use crate::git_panel_settings::StatusStyle;
use crate::repository_selector::RepositorySelectorPopoverMenu;
use crate::ProjectDiff;
use crate::{
    git_panel_settings::GitPanelSettings, git_status_icon, repository_selector::RepositorySelector,
};
use anyhow::Result;
use collections::HashMap;
use db::kvp::KEY_VALUE_STORE;
use editor::actions::MoveToEnd;
use editor::scroll::ScrollbarAutoHide;
use editor::{Editor, EditorMode, EditorSettings, MultiBuffer, ShowScrollbar};
use git::repository::RepoPath;
use git::status::FileStatus;
use git::{CommitAllChanges, CommitChanges, ToggleStaged};
use gpui::*;
use language::Buffer;
use menu::{SelectFirst, SelectLast, SelectNext, SelectPrev};
use panel::PanelHeader;
use project::git::{GitEvent, Repository};
use project::{Fs, Project, ProjectPath};
use serde::{Deserialize, Serialize};
use settings::Settings as _;
use std::{collections::HashSet, path::PathBuf, sync::Arc, time::Duration, usize};
use theme::ThemeSettings;
use ui::{
    prelude::*, ButtonLike, Checkbox, Divider, DividerColor, ElevationIndex, IndentGuideColors,
    ListHeader, ListItem, ListItemSpacing, Scrollbar, ScrollbarState, Tooltip,
};
use util::{maybe, ResultExt, TryFutureExt};
use workspace::notifications::{DetachAndPromptErr, NotificationId};
use workspace::Toast;
use workspace::{
    dock::{DockPosition, Panel, PanelEvent},
    Workspace,
};

actions!(
    git_panel,
    [
        Close,
        ToggleFocus,
        OpenMenu,
        FocusEditor,
        FocusChanges,
        FillCoAuthors,
    ]
);

const GIT_PANEL_KEY: &str = "GitPanel";

const UPDATE_DEBOUNCE: Duration = Duration::from_millis(50);

pub fn init(cx: &mut App) {
    cx.observe_new(
        |workspace: &mut Workspace, _window, _cx: &mut Context<Workspace>| {
            workspace.register_action(|workspace, _: &ToggleFocus, window, cx| {
                workspace.toggle_panel_focus::<GitPanel>(window, cx);
            });
        },
    )
    .detach();
}

#[derive(Debug, Clone)]
pub enum Event {
    Focus,
    OpenedEntry { path: ProjectPath },
}

#[derive(Serialize, Deserialize)]
struct SerializedGitPanel {
    width: Option<Pixels>,
}

#[derive(Debug, PartialEq, Eq, Clone, Copy)]
enum Section {
    Changed,
    Created,
}

impl Section {
    pub fn contains(&self, status: FileStatus) -> bool {
        match self {
            Section::Changed => !status.is_created(),
            Section::Created => status.is_created(),
        }
    }
}

#[derive(Debug, PartialEq, Eq, Clone)]
struct GitHeaderEntry {
    header: Section,
}

impl GitHeaderEntry {
    pub fn contains(&self, status_entry: &GitStatusEntry) -> bool {
        self.header.contains(status_entry.status)
    }
    pub fn title(&self) -> &'static str {
        match self.header {
            Section::Changed => "Changed",
            Section::Created => "New",
        }
    }
}

#[derive(Debug, PartialEq, Eq, Clone)]
enum GitListEntry {
    GitStatusEntry(GitStatusEntry),
    Header(GitHeaderEntry),
}

impl GitListEntry {
    fn status_entry(&self) -> Option<GitStatusEntry> {
        match self {
            GitListEntry::GitStatusEntry(entry) => Some(entry.clone()),
            _ => None,
        }
    }
}

#[derive(Debug, PartialEq, Eq, Clone)]
pub struct GitStatusEntry {
    pub(crate) depth: usize,
    pub(crate) display_name: String,
    pub(crate) repo_path: RepoPath,
    pub(crate) status: FileStatus,
    pub(crate) is_staged: Option<bool>,
}

pub struct PendingOperation {
    finished: bool,
    will_become_staged: bool,
    repo_paths: HashSet<RepoPath>,
    op_id: usize,
}

pub struct GitPanel {
    current_modifiers: Modifiers,
    focus_handle: FocusHandle,
    fs: Arc<dyn Fs>,
    hide_scrollbar_task: Option<Task<()>>,
    pending_serialization: Task<Option<()>>,
    workspace: WeakEntity<Workspace>,
    project: Entity<Project>,
    active_repository: Option<Entity<Repository>>,
    scroll_handle: UniformListScrollHandle,
    scrollbar_state: ScrollbarState,
    selected_entry: Option<usize>,
    show_scrollbar: bool,
    update_visible_entries_task: Task<()>,
    repository_selector: Entity<RepositorySelector>,
    commit_editor: Entity<Editor>,
    entries: Vec<GitListEntry>,
    entries_by_path: collections::HashMap<RepoPath, usize>,
    width: Option<Pixels>,
    pending: Vec<PendingOperation>,
    commit_task: Task<Result<()>>,
    commit_pending: bool,
    can_commit: bool,
    can_commit_all: bool,
}

fn commit_message_editor(
    commit_message_buffer: Option<Entity<Buffer>>,
    window: &mut Window,
    cx: &mut Context<'_, Editor>,
) -> Editor {
    let theme = ThemeSettings::get_global(cx);

    let mut text_style = window.text_style();
    let refinement = TextStyleRefinement {
        font_family: Some(theme.buffer_font.family.clone()),
        font_features: Some(FontFeatures::disable_ligatures()),
        font_size: Some(px(12.).into()),
        color: Some(cx.theme().colors().editor_foreground),
        background_color: Some(gpui::transparent_black()),
        ..Default::default()
    };
    text_style.refine(&refinement);

    let mut commit_editor = if let Some(commit_message_buffer) = commit_message_buffer {
        let buffer = cx.new(|cx| MultiBuffer::singleton(commit_message_buffer, cx));
        Editor::new(
            EditorMode::AutoHeight { max_lines: 10 },
            buffer,
            None,
            false,
            window,
            cx,
        )
    } else {
        Editor::auto_height(10, window, cx)
    };
    commit_editor.set_use_autoclose(false);
    commit_editor.set_show_gutter(false, cx);
    commit_editor.set_show_wrap_guides(false, cx);
    commit_editor.set_show_indent_guides(false, cx);
    commit_editor.set_text_style_refinement(refinement);
    commit_editor.set_placeholder_text("Enter commit message", cx);
    commit_editor
}

impl GitPanel {
    pub fn new(
        workspace: &mut Workspace,
        window: &mut Window,
        commit_message_buffer: Option<Entity<Buffer>>,
        cx: &mut Context<Workspace>,
    ) -> Entity<Self> {
        let fs = workspace.app_state().fs.clone();
        let project = workspace.project().clone();
        let git_state = project.read(cx).git_state().clone();
        let active_repository = project.read(cx).active_repository(cx);
        let workspace = cx.entity().downgrade();

        let git_panel = cx.new(|cx| {
            let focus_handle = cx.focus_handle();
            cx.on_focus(&focus_handle, window, Self::focus_in).detach();
            cx.on_focus_out(&focus_handle, window, |this, _, window, cx| {
                this.hide_scrollbar(window, cx);
            })
            .detach();

            let commit_editor =
                cx.new(|cx| commit_message_editor(commit_message_buffer, window, cx));
            commit_editor.update(cx, |editor, cx| {
                editor.clear(window, cx);
            });

            let scroll_handle = UniformListScrollHandle::new();

            cx.subscribe_in(
                &git_state,
                window,
                move |this, git_state, event, window, cx| match event {
                    GitEvent::FileSystemUpdated => {
                        this.schedule_update(false, window, cx);
                    }
                    GitEvent::ActiveRepositoryChanged | GitEvent::GitStateUpdated => {
                        this.active_repository = git_state.read(cx).active_repository();
                        this.schedule_update(true, window, cx);
                    }
                },
            )
            .detach();

            let repository_selector =
                cx.new(|cx| RepositorySelector::new(project.clone(), window, cx));

            let mut git_panel = Self {
                focus_handle: cx.focus_handle(),
                pending_serialization: Task::ready(None),
                entries: Vec::new(),
                entries_by_path: HashMap::default(),
                pending: Vec::new(),
                current_modifiers: window.modifiers(),
                width: Some(px(360.)),
                scrollbar_state: ScrollbarState::new(scroll_handle.clone())
                    .parent_entity(&cx.entity()),
                repository_selector,
                selected_entry: None,
                show_scrollbar: false,
                hide_scrollbar_task: None,
                update_visible_entries_task: Task::ready(()),
                commit_task: Task::ready(Ok(())),
                commit_pending: false,
                active_repository,
                scroll_handle,
                fs,
                commit_editor,
                project,
                workspace,
                can_commit: false,
                can_commit_all: false,
            };
            git_panel.schedule_update(false, window, cx);
            git_panel.show_scrollbar = git_panel.should_show_scrollbar(cx);
            git_panel
        });

        cx.subscribe_in(
            &git_panel,
            window,
            move |workspace, _, event: &Event, window, cx| match event.clone() {
                Event::OpenedEntry { path } => {
                    workspace
                        .open_path_preview(path, None, false, false, window, cx)
                        .detach_and_prompt_err("Failed to open file", window, cx, |e, _, _| {
                            Some(format!("{e}"))
                        });
                }
                Event::Focus => { /* TODO */ }
            },
        )
        .detach();

        git_panel
    }

    pub fn set_focused_path(&mut self, path: ProjectPath, _: &mut Window, cx: &mut Context<Self>) {
        let Some(git_repo) = self.active_repository.as_ref() else {
            return;
        };
        let Some(repo_path) = git_repo.read(cx).project_path_to_repo_path(&path) else {
            return;
        };
        let Some(ix) = self.entries_by_path.get(&repo_path) else {
            return;
        };

        self.selected_entry = Some(*ix);
        cx.notify();
    }

    fn serialize(&mut self, cx: &mut Context<Self>) {
        let width = self.width;
        self.pending_serialization = cx.background_executor().spawn(
            async move {
                KEY_VALUE_STORE
                    .write_kvp(
                        GIT_PANEL_KEY.into(),
                        serde_json::to_string(&SerializedGitPanel { width })?,
                    )
                    .await?;
                anyhow::Ok(())
            }
            .log_err(),
        );
    }

    fn dispatch_context(&self, window: &mut Window, cx: &Context<Self>) -> KeyContext {
        let mut dispatch_context = KeyContext::new_with_defaults();
        dispatch_context.add("GitPanel");

        if self.is_focused(window, cx) {
            dispatch_context.add("menu");
            dispatch_context.add("ChangesList");
        }

        if self.commit_editor.read(cx).is_focused(window) {
            dispatch_context.add("CommitEditor");
        }

        dispatch_context
    }

    fn is_focused(&self, window: &Window, cx: &Context<Self>) -> bool {
        window
            .focused(cx)
            .map_or(false, |focused| self.focus_handle == focused)
    }

    fn close_panel(&mut self, _: &Close, _window: &mut Window, cx: &mut Context<Self>) {
        cx.emit(PanelEvent::Close);
    }

    fn focus_in(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        if !self.focus_handle.contains_focused(window, cx) {
            cx.emit(Event::Focus);
        }
    }

    fn show_scrollbar(&self, cx: &mut Context<Self>) -> ShowScrollbar {
        GitPanelSettings::get_global(cx)
            .scrollbar
            .show
            .unwrap_or_else(|| EditorSettings::get_global(cx).scrollbar.show)
    }

    fn should_show_scrollbar(&self, cx: &mut Context<Self>) -> bool {
        let show = self.show_scrollbar(cx);
        match show {
            ShowScrollbar::Auto => true,
            ShowScrollbar::System => true,
            ShowScrollbar::Always => true,
            ShowScrollbar::Never => false,
        }
    }

    fn should_autohide_scrollbar(&self, cx: &mut Context<Self>) -> bool {
        let show = self.show_scrollbar(cx);
        match show {
            ShowScrollbar::Auto => true,
            ShowScrollbar::System => cx
                .try_global::<ScrollbarAutoHide>()
                .map_or_else(|| cx.should_auto_hide_scrollbars(), |autohide| autohide.0),
            ShowScrollbar::Always => false,
            ShowScrollbar::Never => true,
        }
    }

    fn hide_scrollbar(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        const SCROLLBAR_SHOW_INTERVAL: Duration = Duration::from_secs(1);
        if !self.should_autohide_scrollbar(cx) {
            return;
        }
        self.hide_scrollbar_task = Some(cx.spawn_in(window, |panel, mut cx| async move {
            cx.background_executor()
                .timer(SCROLLBAR_SHOW_INTERVAL)
                .await;
            panel
                .update(&mut cx, |panel, cx| {
                    panel.show_scrollbar = false;
                    cx.notify();
                })
                .log_err();
        }))
    }

    fn handle_modifiers_changed(
        &mut self,
        event: &ModifiersChangedEvent,
        _: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.current_modifiers = event.modifiers;
        cx.notify();
    }

    fn calculate_depth_and_difference(
        repo_path: &RepoPath,
        visible_entries: &HashSet<RepoPath>,
    ) -> (usize, usize) {
        let ancestors = repo_path.ancestors().skip(1);
        for ancestor in ancestors {
            if let Some(parent_entry) = visible_entries.get(ancestor) {
                let entry_component_count = repo_path.components().count();
                let parent_component_count = parent_entry.components().count();

                let difference = entry_component_count - parent_component_count;

                let parent_depth = parent_entry
                    .ancestors()
                    .skip(1) // Skip the parent itself
                    .filter(|ancestor| visible_entries.contains(*ancestor))
                    .count();

                return (parent_depth + 1, difference);
            }
        }

        (0, 0)
    }

    fn scroll_to_selected_entry(&mut self, cx: &mut Context<Self>) {
        if let Some(selected_entry) = self.selected_entry {
            self.scroll_handle
                .scroll_to_item(selected_entry, ScrollStrategy::Center);
        }

        cx.notify();
    }

    fn select_first(&mut self, _: &SelectFirst, _window: &mut Window, cx: &mut Context<Self>) {
        if self.entries.first().is_some() {
            self.selected_entry = Some(0);
            self.scroll_to_selected_entry(cx);
        }
    }

    fn select_prev(&mut self, _: &SelectPrev, _window: &mut Window, cx: &mut Context<Self>) {
        let item_count = self.entries.len();
        if item_count == 0 {
            return;
        }

        if let Some(selected_entry) = self.selected_entry {
            let new_selected_entry = if selected_entry > 0 {
                selected_entry - 1
            } else {
                selected_entry
            };

            self.selected_entry = Some(new_selected_entry);

            self.scroll_to_selected_entry(cx);
        }

        cx.notify();
    }

    fn select_next(&mut self, _: &SelectNext, _window: &mut Window, cx: &mut Context<Self>) {
        let item_count = self.entries.len();
        if item_count == 0 {
            return;
        }

        if let Some(selected_entry) = self.selected_entry {
            let new_selected_entry = if selected_entry < item_count - 1 {
                selected_entry + 1
            } else {
                selected_entry
            };

            self.selected_entry = Some(new_selected_entry);

            self.scroll_to_selected_entry(cx);
        }

        cx.notify();
    }

    fn select_last(&mut self, _: &SelectLast, _window: &mut Window, cx: &mut Context<Self>) {
        if self.entries.last().is_some() {
            self.selected_entry = Some(self.entries.len() - 1);
            self.scroll_to_selected_entry(cx);
        }
    }

    fn focus_editor(&mut self, _: &FocusEditor, window: &mut Window, cx: &mut Context<Self>) {
        self.commit_editor.update(cx, |editor, cx| {
            window.focus(&editor.focus_handle(cx));
        });
        cx.notify();
    }

    fn select_first_entry_if_none(&mut self, cx: &mut Context<Self>) {
        let have_entries = self
            .active_repository
            .as_ref()
            .map_or(false, |active_repository| {
                active_repository.read(cx).entry_count() > 0
            });
        if have_entries && self.selected_entry.is_none() {
            self.selected_entry = Some(0);
            self.scroll_to_selected_entry(cx);
            cx.notify();
        }
    }

    fn focus_changes_list(
        &mut self,
        _: &FocusChanges,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.select_first_entry_if_none(cx);

        cx.focus_self(window);
        cx.notify();
    }

    fn get_selected_entry(&self) -> Option<&GitListEntry> {
        self.selected_entry.and_then(|i| self.entries.get(i))
    }

    fn open_selected(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
        if let Some(entry) = self.selected_entry.and_then(|i| self.entries.get(i)) {
            self.open_entry(entry, cx);
        }
    }

    fn toggle_staged_for_entry(
        &mut self,
        entry: &GitListEntry,
        _window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        let Some(active_repository) = self.active_repository.as_ref() else {
            return;
        };
        let (stage, repo_paths) = match entry {
            GitListEntry::GitStatusEntry(status_entry) => {
                if status_entry.status.is_staged().unwrap_or(false) {
                    (false, vec![status_entry.repo_path.clone()])
                } else {
                    (true, vec![status_entry.repo_path.clone()])
                }
            }
            GitListEntry::Header(section) => {
                let goal_staged_state = !self.header_state(section.header).selected();
                let entries = self
                    .entries
                    .iter()
                    .filter_map(|entry| entry.status_entry())
                    .filter(|status_entry| {
                        section.contains(&status_entry)
                            && status_entry.is_staged != Some(goal_staged_state)
                    })
                    .map(|status_entry| status_entry.repo_path)
                    .collect::<Vec<_>>();

                (goal_staged_state, entries)
            }
        };

        let op_id = self.pending.iter().map(|p| p.op_id).max().unwrap_or(0) + 1;
        self.pending.push(PendingOperation {
            op_id,
            will_become_staged: stage,
            repo_paths: repo_paths.iter().cloned().collect(),
            finished: false,
        });

        cx.spawn({
            let repo_paths = repo_paths.clone();
            let active_repository = active_repository.clone();
            |this, mut cx| async move {
                let result = cx
                    .update(|cx| {
                        if stage {
                            active_repository.read(cx).stage_entries(repo_paths.clone())
                        } else {
                            active_repository
                                .read(cx)
                                .unstage_entries(repo_paths.clone())
                        }
                    })?
                    .await?;

                this.update(&mut cx, |this, cx| {
                    for pending in this.pending.iter_mut() {
                        if pending.op_id == op_id {
                            pending.finished = true
                        }
                    }
                    result
                        .map_err(|e| {
                            this.show_err_toast(e, cx);
                        })
                        .ok();
                    cx.notify();
                })
            }
        })
        .detach();
    }

    fn toggle_staged_for_selected(
        &mut self,
        _: &git::ToggleStaged,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        if let Some(selected_entry) = self.get_selected_entry().cloned() {
            self.toggle_staged_for_entry(&selected_entry, window, cx);
        }
    }

    fn open_entry(&self, entry: &GitListEntry, cx: &mut Context<Self>) {
        let Some(status_entry) = entry.status_entry() else {
            return;
        };
        let Some(active_repository) = self.active_repository.as_ref() else {
            return;
        };
        let Some(path) = active_repository
            .read(cx)
            .repo_path_to_project_path(&status_entry.repo_path)
        else {
            return;
        };
        let path_exists = self.project.update(cx, |project, cx| {
            project.entry_for_path(&path, cx).is_some()
        });
        if !path_exists {
            return;
        }
        // TODO maybe move all of this into project?
        cx.emit(Event::OpenedEntry { path });
    }

    /// Commit all staged changes
    fn commit_changes(
        &mut self,
        _: &git::CommitChanges,
        name_and_email: Option<(SharedString, SharedString)>,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        let Some(active_repository) = self.active_repository.clone() else {
            return;
        };
        if !self.can_commit {
            return;
        }
        let message = self.commit_editor.read(cx).text(cx);
        if message.trim().is_empty() {
            return;
        }
        self.commit_pending = true;
        let commit_editor = self.commit_editor.clone();
        self.commit_task = cx.spawn_in(window, |git_panel, mut cx| async move {
            let commit = active_repository.update(&mut cx, |active_repository, _| {
                active_repository.commit(SharedString::from(message), name_and_email)
            })?;
            let result = maybe!(async {
                commit.await??;
                cx.update(|window, cx| {
                    commit_editor.update(cx, |editor, cx| editor.clear(window, cx));
                })
            })
            .await;

            git_panel.update(&mut cx, |git_panel, cx| {
                git_panel.commit_pending = false;
                result
                    .map_err(|e| {
                        git_panel.show_err_toast(e, cx);
                    })
                    .ok();
            })
        });
    }

    /// Commit all changes, regardless of whether they are staged or not
    fn commit_tracked_changes(
        &mut self,
        _: &git::CommitAllChanges,
        name_and_email: Option<(SharedString, SharedString)>,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        let Some(active_repository) = self.active_repository.clone() else {
            return;
        };
        if !self.can_commit_all {
            return;
        }

        let message = self.commit_editor.read(cx).text(cx);
        if message.trim().is_empty() {
            return;
        }
        self.commit_pending = true;
        let commit_editor = self.commit_editor.clone();
        let tracked_files = self
            .entries
            .iter()
            .filter_map(|entry| entry.status_entry())
            .filter(|status_entry| {
                Section::Changed.contains(status_entry.status)
                    && !status_entry.is_staged.unwrap_or(false)
            })
            .map(|status_entry| status_entry.repo_path)
            .collect::<Vec<_>>();

        self.commit_task = cx.spawn_in(window, |git_panel, mut cx| async move {
            let result = maybe!(async {
                cx.update(|_, cx| active_repository.read(cx).stage_entries(tracked_files))?
                    .await??;
                cx.update(|_, cx| {
                    active_repository
                        .read(cx)
                        .commit(SharedString::from(message), name_and_email)
                })?
                .await??;
                Ok(())
            })
            .await;
            cx.update(|window, cx| match result {
                Ok(_) => commit_editor.update(cx, |editor, cx| {
                    editor.clear(window, cx);
                }),

                Err(e) => {
                    git_panel
                        .update(cx, |git_panel, cx| {
                            git_panel.show_err_toast(e, cx);
                        })
                        .ok();
                }
            })?;

            git_panel.update(&mut cx, |git_panel, _| {
                git_panel.commit_pending = false;
            })
        });
    }

    fn fill_co_authors(&mut self, _: &FillCoAuthors, window: &mut Window, cx: &mut Context<Self>) {
        const CO_AUTHOR_PREFIX: &str = "Co-authored-by: ";

        let Some(room) = self
            .workspace
            .upgrade()
            .and_then(|workspace| workspace.read(cx).active_call()?.read(cx).room().cloned())
        else {
            return;
        };

        let mut existing_text = self.commit_editor.read(cx).text(cx);
        existing_text.make_ascii_lowercase();
        let lowercase_co_author_prefix = CO_AUTHOR_PREFIX.to_lowercase();
        let mut ends_with_co_authors = false;
        let existing_co_authors = existing_text
            .lines()
            .filter_map(|line| {
                let line = line.trim();
                if line.starts_with(&lowercase_co_author_prefix) {
                    ends_with_co_authors = true;
                    Some(line)
                } else {
                    ends_with_co_authors = false;
                    None
                }
            })
            .collect::<HashSet<_>>();

        let new_co_authors = room
            .read(cx)
            .remote_participants()
            .values()
            .filter(|participant| participant.can_write())
            .map(|participant| participant.user.as_ref())
            .filter_map(|user| {
                let email = user.email.as_deref()?;
                let name = user.name.as_deref().unwrap_or(&user.github_login);
                Some(format!("{CO_AUTHOR_PREFIX}{name} <{email}>"))
            })
            .filter(|co_author| {
                !existing_co_authors.contains(co_author.to_ascii_lowercase().as_str())
            })
            .collect::<Vec<_>>();
        if new_co_authors.is_empty() {
            return;
        }

        self.commit_editor.update(cx, |editor, cx| {
            let editor_end = editor.buffer().read(cx).read(cx).len();
            let mut edit = String::new();
            if !ends_with_co_authors {
                edit.push('\n');
            }
            for co_author in new_co_authors {
                edit.push('\n');
                edit.push_str(&co_author);
            }

            editor.edit(Some((editor_end..editor_end, edit)), cx);
            editor.move_to_end(&MoveToEnd, window, cx);
            editor.focus_handle(cx).focus(window);
        });
    }

    fn schedule_update(
        &mut self,
        clear_pending: bool,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        let handle = cx.entity().downgrade();
        self.reopen_commit_buffer(window, cx);
        self.update_visible_entries_task = cx.spawn_in(window, |_, mut cx| async move {
            cx.background_executor().timer(UPDATE_DEBOUNCE).await;
            if let Some(git_panel) = handle.upgrade() {
                git_panel
                    .update_in(&mut cx, |git_panel, _, cx| {
                        if clear_pending {
                            git_panel.clear_pending();
                        }
                        git_panel.update_visible_entries(cx);
                    })
                    .ok();
            }
        });
    }

    fn reopen_commit_buffer(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        let Some(active_repo) = self.active_repository.as_ref() else {
            return;
        };
        let load_buffer = active_repo.update(cx, |active_repo, cx| {
            let project = self.project.read(cx);
            active_repo.open_commit_buffer(
                Some(project.languages().clone()),
                project.buffer_store().clone(),
                cx,
            )
        });

        cx.spawn_in(window, |git_panel, mut cx| async move {
            let buffer = load_buffer.await?;
            git_panel.update_in(&mut cx, |git_panel, window, cx| {
                if git_panel
                    .commit_editor
                    .read(cx)
                    .buffer()
                    .read(cx)
                    .as_singleton()
                    .as_ref()
                    != Some(&buffer)
                {
                    git_panel.commit_editor =
                        cx.new(|cx| commit_message_editor(Some(buffer), window, cx));
                }
            })
        })
        .detach_and_log_err(cx);
    }

    fn clear_pending(&mut self) {
        self.pending.retain(|v| !v.finished)
    }

    fn update_visible_entries(&mut self, cx: &mut Context<Self>) {
        self.entries.clear();
        self.entries_by_path.clear();
        let mut changed_entries = Vec::new();
        let mut new_entries = Vec::new();

        let Some(repo) = self.active_repository.as_ref() else {
            // Just clear entries if no repository is active.
            cx.notify();
            return;
        };

        // First pass - collect all paths
        let repo = repo.read(cx);
        let path_set = HashSet::from_iter(repo.status().map(|entry| entry.repo_path));

        let mut has_changed_checked_boxes = false;
        let mut has_changed = false;
        let mut has_added_checked_boxes = false;

        // Second pass - create entries with proper depth calculation
        for entry in repo.status() {
            let (depth, difference) =
                Self::calculate_depth_and_difference(&entry.repo_path, &path_set);

            let is_new = entry.status.is_created();
            let is_staged = entry.status.is_staged();

            let display_name = if difference > 1 {
                // Show partial path for deeply nested files
                entry
                    .repo_path
                    .as_ref()
                    .iter()
                    .skip(entry.repo_path.components().count() - difference)
                    .collect::<PathBuf>()
                    .to_string_lossy()
                    .into_owned()
            } else {
                // Just show filename
                entry
                    .repo_path
                    .file_name()
                    .map(|name| name.to_string_lossy().into_owned())
                    .unwrap_or_default()
            };

            let entry = GitStatusEntry {
                depth,
                display_name,
                repo_path: entry.repo_path.clone(),
                status: entry.status,
                is_staged,
            };

            if is_new {
                if entry.is_staged != Some(false) {
                    has_added_checked_boxes = true
                }
                new_entries.push(entry);
            } else {
                has_changed = true;
                if entry.is_staged != Some(false) {
                    has_changed_checked_boxes = true
                }
                changed_entries.push(entry);
            }
        }

        // Sort entries by path to maintain consistent order
        changed_entries.sort_by(|a, b| a.repo_path.cmp(&b.repo_path));
        new_entries.sort_by(|a, b| a.repo_path.cmp(&b.repo_path));

        if changed_entries.len() > 0 {
            self.entries.push(GitListEntry::Header(GitHeaderEntry {
                header: Section::Changed,
            }));
            self.entries.extend(
                changed_entries
                    .into_iter()
                    .map(GitListEntry::GitStatusEntry),
            );
        }
        if new_entries.len() > 0 {
            self.entries.push(GitListEntry::Header(GitHeaderEntry {
                header: Section::Created,
            }));
            self.entries
                .extend(new_entries.into_iter().map(GitListEntry::GitStatusEntry));
        }

        for (ix, entry) in self.entries.iter().enumerate() {
            if let Some(status_entry) = entry.status_entry() {
                self.entries_by_path.insert(status_entry.repo_path, ix);
            }
        }
        self.can_commit = has_changed_checked_boxes || has_added_checked_boxes;
        self.can_commit_all = has_changed || has_added_checked_boxes;

        self.select_first_entry_if_none(cx);

        cx.notify();
    }

    fn header_state(&self, header_type: Section) -> ToggleState {
        let mut count = 0;
        let mut staged_count = 0;
        'outer: for entry in &self.entries {
            let Some(entry) = entry.status_entry() else {
                continue;
            };
            if entry.status.is_created() != (header_type == Section::Created) {
                continue;
            }
            count += 1;
            for pending in self.pending.iter().rev() {
                if pending.repo_paths.contains(&entry.repo_path) {
                    if pending.will_become_staged {
                        staged_count += 1;
                    }
                    continue 'outer;
                }
            }
            staged_count += entry.status.is_staged().unwrap_or(false) as usize;
        }

        if staged_count == 0 {
            ToggleState::Unselected
        } else if count == staged_count {
            ToggleState::Selected
        } else {
            ToggleState::Indeterminate
        }
    }

    fn show_err_toast(&self, e: anyhow::Error, cx: &mut App) {
        let Some(workspace) = self.workspace.upgrade() else {
            return;
        };
        let notif_id = NotificationId::Named("git-operation-error".into());
        let message = e.to_string();
        workspace.update(cx, |workspace, cx| {
            let toast = Toast::new(notif_id, message).on_click("Open Zed Log", |window, cx| {
                window.dispatch_action(workspace::OpenLog.boxed_clone(), cx);
            });
            workspace.show_toast(toast, cx);
        });
    }
}

impl GitPanel {
    pub fn panel_button(
        &self,
        id: impl Into<SharedString>,
        label: impl Into<SharedString>,
    ) -> Button {
        let id = id.into().clone();
        let label = label.into().clone();

        Button::new(id, label)
            .label_size(LabelSize::Small)
            .layer(ElevationIndex::ElevatedSurface)
            .size(ButtonSize::Compact)
            .style(ButtonStyle::Filled)
    }

    pub fn indent_size(&self, window: &Window, cx: &mut Context<Self>) -> Pixels {
        Checkbox::container_size(cx).to_pixels(window.rem_size())
    }

    pub fn render_divider(&self, _cx: &mut Context<Self>) -> impl IntoElement {
        h_flex()
            .items_center()
            .h(px(8.))
            .child(Divider::horizontal_dashed().color(DividerColor::Border))
    }

    pub fn render_panel_header(
        &self,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> impl IntoElement {
        let all_repositories = self
            .project
            .read(cx)
            .git_state()
            .read(cx)
            .all_repositories();
        let entry_count = self
            .active_repository
            .as_ref()
            .map_or(0, |repo| repo.read(cx).entry_count());

        let changes_string = match entry_count {
            0 => "No changes".to_string(),
            1 => "1 change".to_string(),
            n => format!("{} changes", n),
        };

        self.panel_header_container(window, cx)
            .child(h_flex().gap_2().child(if all_repositories.len() <= 1 {
                div()
                    .id("changes-label")
                    .text_buffer(cx)
                    .text_ui_sm(cx)
                    .child(
                        Label::new(changes_string)
                            .single_line()
                            .size(LabelSize::Small),
                    )
                    .into_any_element()
            } else {
                self.render_repository_selector(cx).into_any_element()
            }))
            .child(div().flex_grow())
    }

    pub fn render_repository_selector(&self, cx: &mut Context<Self>) -> impl IntoElement {
        let active_repository = self.project.read(cx).active_repository(cx);
        let repository_display_name = active_repository
            .as_ref()
            .map(|repo| repo.read(cx).display_name(self.project.read(cx), cx))
            .unwrap_or_default();

        let entry_count = self.entries.len();

        RepositorySelectorPopoverMenu::new(
            self.repository_selector.clone(),
            ButtonLike::new("active-repository")
                .style(ButtonStyle::Subtle)
                .child(
                    h_flex().w_full().gap_0p5().child(
                        div()
                            .overflow_x_hidden()
                            .flex_grow()
                            .whitespace_nowrap()
                            .child(
                                h_flex()
                                    .gap_1()
                                    .child(
                                        Label::new(repository_display_name).size(LabelSize::Small),
                                    )
                                    .when(entry_count > 0, |flex| {
                                        flex.child(
                                            Label::new(format!("({})", entry_count))
                                                .size(LabelSize::Small)
                                                .color(Color::Muted),
                                        )
                                    })
                                    .into_any_element(),
                            ),
                    ),
                ),
        )
    }

    pub fn render_commit_editor(
        &self,
        name_and_email: Option<(SharedString, SharedString)>,
        cx: &Context<Self>,
    ) -> impl IntoElement {
        let editor = self.commit_editor.clone();
        let can_commit = !self.commit_pending && self.can_commit && !editor.read(cx).is_empty(cx);
        let can_commit_all =
            !self.commit_pending && self.can_commit_all && !editor.read(cx).is_empty(cx);
        let editor_focus_handle = editor.read(cx).focus_handle(cx).clone();

        let focus_handle_1 = self.focus_handle(cx).clone();
        let focus_handle_2 = self.focus_handle(cx).clone();

        let commit_staged_button = self
            .panel_button("commit-staged-changes", "Commit")
            .tooltip(move |window, cx| {
                let focus_handle = focus_handle_1.clone();
                Tooltip::for_action_in(
                    "Commit all staged changes",
                    &CommitChanges,
                    &focus_handle,
                    window,
                    cx,
                )
            })
            .disabled(!can_commit)
            .on_click({
                let name_and_email = name_and_email.clone();
                cx.listener(move |this, _: &ClickEvent, window, cx| {
                    this.commit_changes(&CommitChanges, name_and_email.clone(), window, cx)
                })
            });

        let commit_all_button = self
            .panel_button("commit-all-changes", "Commit All")
            .tooltip(move |window, cx| {
                let focus_handle = focus_handle_2.clone();
                Tooltip::for_action_in(
                    "Commit all changes, including unstaged changes",
                    &CommitAllChanges,
                    &focus_handle,
                    window,
                    cx,
                )
            })
            .disabled(!can_commit_all)
            .on_click({
                let name_and_email = name_and_email.clone();
                cx.listener(move |this, _: &ClickEvent, window, cx| {
                    this.commit_tracked_changes(
                        &CommitAllChanges,
                        name_and_email.clone(),
                        window,
                        cx,
                    )
                })
            });

        div().w_full().h(px(140.)).px_2().pt_1().pb_2().child(
            v_flex()
                .id("commit-editor-container")
                .relative()
                .h_full()
                .py_2p5()
                .px_3()
                .bg(cx.theme().colors().editor_background)
                .on_click(cx.listener(move |_, _: &ClickEvent, window, _cx| {
                    window.focus(&editor_focus_handle);
                }))
                .child(self.commit_editor.clone())
                .child(
                    h_flex()
                        .absolute()
                        .bottom_2p5()
                        .right_3()
                        .gap_1p5()
                        .child(div().gap_1().flex_grow())
                        .child(commit_all_button)
                        .child(commit_staged_button),
                ),
        )
    }

    fn render_empty_state(&self, cx: &mut Context<Self>) -> impl IntoElement {
        h_flex()
            .h_full()
            .flex_1()
            .justify_center()
            .items_center()
            .child(
                v_flex()
                    .gap_3()
                    .child("No changes to commit")
                    .text_ui_sm(cx)
                    .mx_auto()
                    .text_color(Color::Placeholder.color(cx)),
            )
    }

    fn render_scrollbar(&self, cx: &mut Context<Self>) -> Option<Stateful<Div>> {
        let scroll_bar_style = self.show_scrollbar(cx);
        let show_container = matches!(scroll_bar_style, ShowScrollbar::Always);

        if !self.should_show_scrollbar(cx)
            || !(self.show_scrollbar || self.scrollbar_state.is_dragging())
        {
            return None;
        }

        Some(
            div()
                .id("git-panel-vertical-scroll")
                .occlude()
                .flex_none()
                .h_full()
                .cursor_default()
                .when(show_container, |this| this.pl_1().px_1p5())
                .when(!show_container, |this| {
                    this.absolute().right_1().top_1().bottom_1().w(px(12.))
                })
                .on_mouse_move(cx.listener(|_, _, _, cx| {
                    cx.notify();
                    cx.stop_propagation()
                }))
                .on_hover(|_, _, cx| {
                    cx.stop_propagation();
                })
                .on_any_mouse_down(|_, _, cx| {
                    cx.stop_propagation();
                })
                .on_mouse_up(
                    MouseButton::Left,
                    cx.listener(|this, _, window, cx| {
                        if !this.scrollbar_state.is_dragging()
                            && !this.focus_handle.contains_focused(window, cx)
                        {
                            this.hide_scrollbar(window, cx);
                            cx.notify();
                        }

                        cx.stop_propagation();
                    }),
                )
                .on_scroll_wheel(cx.listener(|_, _, _, cx| {
                    cx.notify();
                }))
                .children(Scrollbar::vertical(
                    // percentage as f32..end_offset as f32,
                    self.scrollbar_state.clone(),
                )),
        )
    }

    fn render_entries(
        &self,
        has_write_access: bool,
        window: &Window,
        cx: &mut Context<Self>,
    ) -> impl IntoElement {
        let entry_count = self.entries.len();

        v_flex()
            .size_full()
            .overflow_hidden()
            .child(
                uniform_list(cx.entity().clone(), "entries", entry_count, {
                    move |this, range, window, cx| {
                        let mut items = Vec::with_capacity(range.end - range.start);

                        for ix in range {
                            match &this.entries.get(ix) {
                                Some(GitListEntry::GitStatusEntry(entry)) => {
                                    items.push(this.render_entry(
                                        ix,
                                        entry,
                                        has_write_access,
                                        window,
                                        cx,
                                    ));
                                }
                                Some(GitListEntry::Header(header)) => {
                                    items.push(this.render_list_header(
                                        ix,
                                        header,
                                        has_write_access,
                                        window,
                                        cx,
                                    ));
                                }
                                None => {}
                            }
                        }

                        items
                    }
                })
                .with_decoration(
                    ui::indent_guides(
                        cx.entity().clone(),
                        self.indent_size(window, cx),
                        IndentGuideColors::panel(cx),
                        |this, range, _windows, _cx| {
                            this.entries
                                .iter()
                                .skip(range.start)
                                .map(|entry| match entry {
                                    GitListEntry::GitStatusEntry(_) => 1,
                                    GitListEntry::Header(_) => 0,
                                })
                                .collect()
                        },
                    )
                    .with_render_fn(
                        cx.entity().clone(),
                        move |_, params, _, _| {
                            let indent_size = params.indent_size;
                            let left_offset = indent_size - px(3.0);
                            let item_height = params.item_height;

                            params
                                .indent_guides
                                .into_iter()
                                .enumerate()
                                .map(|(_, layout)| {
                                    let offset = if layout.continues_offscreen {
                                        px(0.)
                                    } else {
                                        px(4.0)
                                    };
                                    let bounds = Bounds::new(
                                        point(
                                            px(layout.offset.x as f32) * indent_size + left_offset,
                                            px(layout.offset.y as f32) * item_height + offset,
                                        ),
                                        size(
                                            px(1.),
                                            px(layout.length as f32) * item_height
                                                - px(offset.0 * 2.),
                                        ),
                                    );
                                    ui::RenderedIndentGuide {
                                        bounds,
                                        layout,
                                        is_active: false,
                                        hitbox: None,
                                    }
                                })
                                .collect()
                        },
                    ),
                )
                .size_full()
                .with_sizing_behavior(ListSizingBehavior::Infer)
                .with_horizontal_sizing_behavior(ListHorizontalSizingBehavior::Unconstrained)
                .track_scroll(self.scroll_handle.clone()),
            )
            .children(self.render_scrollbar(cx))
    }

    fn entry_label(&self, label: impl Into<SharedString>, color: Color) -> Label {
        Label::new(label.into()).color(color).single_line()
    }

    fn render_list_header(
        &self,
        ix: usize,
        header: &GitHeaderEntry,
        has_write_access: bool,
        _window: &Window,
        cx: &Context<Self>,
    ) -> AnyElement {
        let checkbox = Checkbox::new(header.title(), self.header_state(header.header))
            .disabled(!has_write_access)
            .fill()
            .elevation(ElevationIndex::Surface);
        let selected = self.selected_entry == Some(ix);

        div()
            .w_full()
            .child(
                ListHeader::new(header.title())
                    .start_slot(checkbox)
                    .toggle_state(selected)
                    .on_toggle({
                        let header = header.clone();
                        cx.listener(move |this, _, window, cx| {
                            if !has_write_access {
                                return;
                            }
                            this.selected_entry = Some(ix);
                            this.toggle_staged_for_entry(
                                &GitListEntry::Header(header.clone()),
                                window,
                                cx,
                            )
                        })
                    })
                    .inset(true),
            )
            .into_any_element()
    }

    fn render_entry(
        &self,
        ix: usize,
        entry: &GitStatusEntry,
        has_write_access: bool,
        window: &Window,
        cx: &Context<Self>,
    ) -> AnyElement {
        let display_name = entry
            .repo_path
            .file_name()
            .map(|name| name.to_string_lossy().into_owned())
            .unwrap_or_else(|| entry.repo_path.to_string_lossy().into_owned());

        let pending = self.pending.iter().rev().find_map(|pending| {
            if pending.repo_paths.contains(&entry.repo_path) {
                Some(pending.will_become_staged)
            } else {
                None
            }
        });

        let repo_path = entry.repo_path.clone();
        let selected = self.selected_entry == Some(ix);
        let status_style = GitPanelSettings::get_global(cx).status_style;
        let status = entry.status;
        let has_conflict = status.is_conflicted();
        let is_modified = status.is_modified();
        let is_deleted = status.is_deleted();

        let label_color = if status_style == StatusStyle::LabelColor {
            if has_conflict {
                Color::Conflict
            } else if is_modified {
                Color::Modified
            } else if is_deleted {
                // We don't want a bunch of red labels in the list
                Color::Disabled
            } else {
                Color::Created
            }
        } else {
            Color::Default
        };

        let path_color = if status.is_deleted() {
            Color::Disabled
        } else {
            Color::Muted
        };

        let id: ElementId = ElementId::Name(format!("entry_{}", display_name).into());

        let is_staged = pending
            .or_else(|| entry.is_staged)
            .map(ToggleState::from)
            .unwrap_or(ToggleState::Indeterminate);

        let checkbox = Checkbox::new(id, is_staged)
            .disabled(!has_write_access)
            .fill()
            .elevation(ElevationIndex::Surface)
            .on_click({
                let entry = entry.clone();
                cx.listener(move |this, _, window, cx| {
                    this.toggle_staged_for_entry(
                        &GitListEntry::GitStatusEntry(entry.clone()),
                        window,
                        cx,
                    );
                    cx.stop_propagation();
                })
            });

        let start_slot = h_flex()
            .id(("start-slot", ix))
            .gap(DynamicSpacing::Base04.rems(cx))
            .child(checkbox)
            .child(git_status_icon(status, cx))
            .on_mouse_down(MouseButton::Left, |_, _, cx| {
                // prevent the list item active state triggering when toggling checkbox
                cx.stop_propagation();
            });

        let id = ElementId::Name(format!("entry_{}", display_name).into());

        div()
            .w_full()
            .px_0p5()
            .child(
                ListItem::new(id)
                    .indent_level(1)
                    .indent_step_size(Checkbox::container_size(cx).to_pixels(window.rem_size()))
                    .spacing(ListItemSpacing::Sparse)
                    .start_slot(start_slot)
                    .toggle_state(selected)
                    .disabled(!has_write_access)
                    .on_click({
                        let entry = entry.clone();
                        cx.listener(move |this, _, window, cx| {
                            this.selected_entry = Some(ix);
                            let Some(workspace) = this.workspace.upgrade() else {
                                return;
                            };
                            workspace.update(cx, |workspace, cx| {
                                ProjectDiff::deploy_at(workspace, Some(entry.clone()), window, cx);
                            })
                        })
                    })
                    .child(
                        h_flex()
                            .when_some(repo_path.parent(), |this, parent| {
                                let parent_str = parent.to_string_lossy();
                                if !parent_str.is_empty() {
                                    this.child(
                                        self.entry_label(format!("{}/", parent_str), path_color)
                                            .when(status.is_deleted(), |this| {
                                                this.strikethrough(true)
                                            }),
                                    )
                                } else {
                                    this
                                }
                            })
                            .child(
                                self.entry_label(display_name.clone(), label_color)
                                    .when(status.is_deleted(), |this| this.strikethrough(true)),
                            ),
                    ),
            )
            .into_any_element()
    }
}

impl Render for GitPanel {
    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
        let project = self.project.read(cx);
        let has_entries = self
            .active_repository
            .as_ref()
            .map_or(false, |active_repository| {
                active_repository.read(cx).entry_count() > 0
            });
        let room = self
            .workspace
            .upgrade()
            .and_then(|workspace| workspace.read(cx).active_call()?.read(cx).room().cloned());

        let has_write_access = room
            .as_ref()
            .map_or(true, |room| room.read(cx).local_participant().can_write());
        let (can_commit, name_and_email) = match &room {
            Some(room) => {
                if project.is_via_collab() {
                    if has_write_access {
                        let name_and_email =
                            room.read(cx).local_participant_user(cx).and_then(|user| {
                                let email = SharedString::from(user.email.clone()?);
                                let name = user
                                    .name
                                    .clone()
                                    .map(SharedString::from)
                                    .unwrap_or(SharedString::from(user.github_login.clone()));
                                Some((name, email))
                            });
                        (name_and_email.is_some(), name_and_email)
                    } else {
                        (false, None)
                    }
                } else {
                    (has_write_access, None)
                }
            }
            None => (has_write_access, None),
        };
        let can_commit = !self.commit_pending && can_commit;

        let has_co_authors = can_commit
            && has_write_access
            && room.map_or(false, |room| {
                room.read(cx)
                    .remote_participants()
                    .values()
                    .any(|remote_participant| remote_participant.can_write())
            });

        v_flex()
            .id("git_panel")
            .key_context(self.dispatch_context(window, cx))
            .track_focus(&self.focus_handle)
            .on_modifiers_changed(cx.listener(Self::handle_modifiers_changed))
            .when(has_write_access && !project.is_read_only(cx), |this| {
                this.on_action(cx.listener(|this, &ToggleStaged, window, cx| {
                    this.toggle_staged_for_selected(&ToggleStaged, window, cx)
                }))
                .when(can_commit, |git_panel| {
                    git_panel
                        .on_action({
                            let name_and_email = name_and_email.clone();
                            cx.listener(move |git_panel, &CommitChanges, window, cx| {
                                git_panel.commit_changes(
                                    &CommitChanges,
                                    name_and_email.clone(),
                                    window,
                                    cx,
                                )
                            })
                        })
                        .on_action({
                            let name_and_email = name_and_email.clone();
                            cx.listener(move |git_panel, &CommitAllChanges, window, cx| {
                                git_panel.commit_tracked_changes(
                                    &CommitAllChanges,
                                    name_and_email.clone(),
                                    window,
                                    cx,
                                )
                            })
                        })
                })
            })
            .when(self.is_focused(window, cx), |this| {
                this.on_action(cx.listener(Self::select_first))
                    .on_action(cx.listener(Self::select_next))
                    .on_action(cx.listener(Self::select_prev))
                    .on_action(cx.listener(Self::select_last))
                    .on_action(cx.listener(Self::close_panel))
            })
            .on_action(cx.listener(Self::open_selected))
            .on_action(cx.listener(Self::focus_changes_list))
            .on_action(cx.listener(Self::focus_editor))
            .on_action(cx.listener(Self::toggle_staged_for_selected))
            .when(has_co_authors, |git_panel| {
                git_panel.on_action(cx.listener(Self::fill_co_authors))
            })
            // .on_action(cx.listener(|this, &OpenSelected, cx| this.open_selected(&OpenSelected, cx)))
            .on_hover(cx.listener(|this, hovered, window, cx| {
                if *hovered {
                    this.show_scrollbar = true;
                    this.hide_scrollbar_task.take();
                    cx.notify();
                } else if !this.focus_handle.contains_focused(window, cx) {
                    this.hide_scrollbar(window, cx);
                }
            }))
            .size_full()
            .overflow_hidden()
            .bg(ElevationIndex::Surface.bg(cx))
            .child(self.render_panel_header(window, cx))
            .child(if has_entries {
                self.render_entries(has_write_access, window, cx)
                    .into_any_element()
            } else {
                self.render_empty_state(cx).into_any_element()
            })
            .child(self.render_commit_editor(name_and_email, cx))
    }
}

impl Focusable for GitPanel {
    fn focus_handle(&self, _: &App) -> gpui::FocusHandle {
        self.focus_handle.clone()
    }
}

impl EventEmitter<Event> for GitPanel {}

impl EventEmitter<PanelEvent> for GitPanel {}

impl Panel for GitPanel {
    fn persistent_name() -> &'static str {
        "GitPanel"
    }

    fn position(&self, _: &Window, cx: &App) -> DockPosition {
        GitPanelSettings::get_global(cx).dock
    }

    fn position_is_valid(&self, position: DockPosition) -> bool {
        matches!(position, DockPosition::Left | DockPosition::Right)
    }

    fn set_position(&mut self, position: DockPosition, _: &mut Window, cx: &mut Context<Self>) {
        settings::update_settings_file::<GitPanelSettings>(
            self.fs.clone(),
            cx,
            move |settings, _| settings.dock = Some(position),
        );
    }

    fn size(&self, _: &Window, cx: &App) -> Pixels {
        self.width
            .unwrap_or_else(|| GitPanelSettings::get_global(cx).default_width)
    }

    fn set_size(&mut self, size: Option<Pixels>, _: &mut Window, cx: &mut Context<Self>) {
        self.width = size;
        self.serialize(cx);
        cx.notify();
    }

    fn icon(&self, _: &Window, cx: &App) -> Option<ui::IconName> {
        Some(ui::IconName::GitBranch).filter(|_| GitPanelSettings::get_global(cx).button)
    }

    fn icon_tooltip(&self, _window: &Window, _cx: &App) -> Option<&'static str> {
        Some("Git Panel")
    }

    fn toggle_action(&self) -> Box<dyn Action> {
        Box::new(ToggleFocus)
    }

    fn activation_priority(&self) -> u32 {
        2
    }
}

impl PanelHeader for GitPanel {}
