use anyhow::Result;
use gpui::AppContext;
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use settings::{Settings, SettingsSources};

#[derive(Deserialize)]
pub struct WorkspaceSettings {
    pub active_pane_magnification: f32,
    pub centered_layout: CenteredLayoutSettings,
    pub confirm_quit: bool,
    pub show_call_status_icon: bool,
    pub autosave: AutosaveSetting,
    pub restore_on_startup: RestoreOnStartupBehaviour,
    pub drop_target_size: f32,
}

#[derive(Copy, Clone, Default, Serialize, Deserialize, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum RestoreOnStartupBehaviour {
    /// Always start with an empty editor
    None,
    /// Restore the workspace that was closed last.
    #[default]
    LastWorkspace,
}

#[derive(Clone, Default, Serialize, Deserialize, JsonSchema)]
pub struct WorkspaceSettingsContent {
    /// Scale by which to zoom the active pane.
    /// When set to 1.0, the active pane has the same size as others,
    /// but when set to a larger value, the active pane takes up more space.
    ///
    /// Default: `1.0`
    pub active_pane_magnification: Option<f32>,
    // Centered layout related settings.
    pub centered_layout: Option<CenteredLayoutSettings>,
    /// Whether or not to prompt the user to confirm before closing the application.
    ///
    /// Default: false
    pub confirm_quit: Option<bool>,
    /// Whether or not to show the call status icon in the status bar.
    ///
    /// Default: true
    pub show_call_status_icon: Option<bool>,
    /// When to automatically save edited buffers.
    ///
    /// Default: off
    pub autosave: Option<AutosaveSetting>,
    /// Controls previous session restoration in freshly launched Zed instance.
    /// Values: none, last_workspace
    /// Default: last_workspace
    pub restore_on_startup: Option<RestoreOnStartupBehaviour>,
    /// The size of the workspace split drop targets on the outer edges.
    /// Given as a fraction that will be multiplied by the smaller dimension of the workspace.
    ///
    /// Default: `0.2` (20% of the smaller dimension of the workspace)
    pub drop_target_size: Option<f32>,
}

#[derive(Deserialize)]
pub struct TabBarSettings {
    pub show_nav_history_buttons: bool,
}

#[derive(Clone, Default, Serialize, Deserialize, JsonSchema)]
pub struct TabBarSettingsContent {
    /// Whether or not to show the navigation history buttons in the tab bar.
    ///
    /// Default: true
    pub show_nav_history_buttons: Option<bool>,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum AutosaveSetting {
    /// Disable autosave.
    Off,
    /// Save after inactivity period of `milliseconds`.
    AfterDelay { milliseconds: u64 },
    /// Autosave when focus changes.
    OnFocusChange,
    /// Autosave when the active window changes.
    OnWindowChange,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub struct CenteredLayoutSettings {
    /// The relative width of the left padding of the central pane from the
    /// workspace when the centered layout is used.
    ///
    /// Default: 0.2
    pub left_padding: Option<f32>,
    // The relative width of the right padding of the central pane from the
    // workspace when the centered layout is used.
    ///
    /// Default: 0.2
    pub right_padding: Option<f32>,
}

impl Settings for WorkspaceSettings {
    const KEY: Option<&'static str> = None;

    type FileContent = WorkspaceSettingsContent;

    fn load(sources: SettingsSources<Self::FileContent>, _: &mut AppContext) -> Result<Self> {
        sources.json_merge()
    }
}

impl Settings for TabBarSettings {
    const KEY: Option<&'static str> = Some("tab_bar");

    type FileContent = TabBarSettingsContent;

    fn load(sources: SettingsSources<Self::FileContent>, _: &mut AppContext) -> Result<Self> {
        sources.json_merge()
    }
}