use crate::{
    display_map::{InlayOffset, ToDisplayPoint},
    link_go_to_definition::{InlayHighlight, RangeInEditor},
    Anchor, AnchorRangeExt, DisplayPoint, Editor, EditorSettings, EditorSnapshot, EditorStyle,
    ExcerptId, RangeToAnchorExt,
};
use futures::FutureExt;
use gpui::{
    AnyElement, AppContext, CursorStyle, Element, Model, MouseButton, Task, ViewContext, WeakView,
};
use language::{
    markdown, Bias, DiagnosticEntry, DiagnosticSeverity, Language, LanguageRegistry, ParsedMarkdown,
};
use project::{HoverBlock, HoverBlockKind, InlayHintLabelPart, Project};
use std::{ops::Range, sync::Arc, time::Duration};
use util::TryFutureExt;
use workspace::Workspace;

pub const HOVER_DELAY_MILLIS: u64 = 350;
pub const HOVER_REQUEST_DELAY_MILLIS: u64 = 200;

pub const MIN_POPOVER_CHARACTER_WIDTH: f32 = 20.;
pub const MIN_POPOVER_LINE_HEIGHT: f32 = 4.;
pub const HOVER_POPOVER_GAP: f32 = 10.;

// actions!(editor, [Hover]);

pub fn init(cx: &mut AppContext) {
    // cx.add_action(hover);
}

// todo!()
// /// Bindable action which uses the most recent selection head to trigger a hover
// pub fn hover(editor: &mut Editor, _: &Hover, cx: &mut ViewContext<Editor>) {
//     let head = editor.selections.newest_display(cx).head();
//     show_hover(editor, head, true, cx);
// }

/// The internal hover action dispatches between `show_hover` or `hide_hover`
/// depending on whether a point to hover over is provided.
pub fn hover_at(editor: &mut Editor, point: Option<DisplayPoint>, cx: &mut ViewContext<Editor>) {
    if EditorSettings::get_global(cx).hover_popover_enabled {
        if let Some(point) = point {
            show_hover(editor, point, false, cx);
        } else {
            hide_hover(editor, cx);
        }
    }
}

pub struct InlayHover {
    pub excerpt: ExcerptId,
    pub range: InlayHighlight,
    pub tooltip: HoverBlock,
}

pub fn find_hovered_hint_part(
    label_parts: Vec<InlayHintLabelPart>,
    hint_start: InlayOffset,
    hovered_offset: InlayOffset,
) -> Option<(InlayHintLabelPart, Range<InlayOffset>)> {
    if hovered_offset >= hint_start {
        let mut hovered_character = (hovered_offset - hint_start).0;
        let mut part_start = hint_start;
        for part in label_parts {
            let part_len = part.value.chars().count();
            if hovered_character > part_len {
                hovered_character -= part_len;
                part_start.0 += part_len;
            } else {
                let part_end = InlayOffset(part_start.0 + part_len);
                return Some((part, part_start..part_end));
            }
        }
    }
    None
}

pub fn hover_at_inlay(editor: &mut Editor, inlay_hover: InlayHover, cx: &mut ViewContext<Editor>) {
    if EditorSettings::get_global(cx).hover_popover_enabled {
        if editor.pending_rename.is_some() {
            return;
        }

        let Some(project) = editor.project.clone() else {
            return;
        };

        if let Some(InfoPopover { symbol_range, .. }) = &editor.hover_state.info_popover {
            if let RangeInEditor::Inlay(range) = symbol_range {
                if range == &inlay_hover.range {
                    // Hover triggered from same location as last time. Don't show again.
                    return;
                }
            }
            hide_hover(editor, cx);
        }

        let task = cx.spawn(|this, mut cx| {
            async move {
                cx.background()
                    .timer(Duration::from_millis(HOVER_DELAY_MILLIS))
                    .await;
                this.update(&mut cx, |this, _| {
                    this.hover_state.diagnostic_popover = None;
                })?;

                let language_registry = project.update(&mut cx, |p, _| p.languages().clone());
                let blocks = vec![inlay_hover.tooltip];
                let parsed_content = parse_blocks(&blocks, &language_registry, None).await;

                let hover_popover = InfoPopover {
                    project: project.clone(),
                    symbol_range: RangeInEditor::Inlay(inlay_hover.range.clone()),
                    blocks,
                    parsed_content,
                };

                this.update(&mut cx, |this, cx| {
                    // Highlight the selected symbol using a background highlight
                    this.highlight_inlay_background::<HoverState>(
                        vec![inlay_hover.range],
                        |theme| theme.editor.hover_popover.highlight,
                        cx,
                    );
                    this.hover_state.info_popover = Some(hover_popover);
                    cx.notify();
                })?;

                anyhow::Ok(())
            }
            .log_err()
        });

        editor.hover_state.info_task = Some(task);
    }
}

/// Hides the type information popup.
/// Triggered by the `Hover` action when the cursor is not over a symbol or when the
/// selections changed.
pub fn hide_hover(editor: &mut Editor, cx: &mut ViewContext<Editor>) -> bool {
    let did_hide = editor.hover_state.info_popover.take().is_some()
        | editor.hover_state.diagnostic_popover.take().is_some();

    editor.hover_state.info_task = None;
    editor.hover_state.triggered_from = None;

    editor.clear_background_highlights::<HoverState>(cx);

    if did_hide {
        cx.notify();
    }

    did_hide
}

/// Queries the LSP and shows type info and documentation
/// about the symbol the mouse is currently hovering over.
/// Triggered by the `Hover` action when the cursor may be over a symbol.
fn show_hover(
    editor: &mut Editor,
    point: DisplayPoint,
    ignore_timeout: bool,
    cx: &mut ViewContext<Editor>,
) {
    if editor.pending_rename.is_some() {
        return;
    }

    let snapshot = editor.snapshot(cx);
    let multibuffer_offset = point.to_offset(&snapshot.display_snapshot, Bias::Left);

    let (buffer, buffer_position) = if let Some(output) = editor
        .buffer
        .read(cx)
        .text_anchor_for_position(multibuffer_offset, cx)
    {
        output
    } else {
        return;
    };

    let excerpt_id = if let Some((excerpt_id, _, _)) = editor
        .buffer()
        .read(cx)
        .excerpt_containing(multibuffer_offset, cx)
    {
        excerpt_id
    } else {
        return;
    };

    let project = if let Some(project) = editor.project.clone() {
        project
    } else {
        return;
    };

    if !ignore_timeout {
        if let Some(InfoPopover { symbol_range, .. }) = &editor.hover_state.info_popover {
            if symbol_range
                .as_text_range()
                .map(|range| {
                    range
                        .to_offset(&snapshot.buffer_snapshot)
                        .contains(&multibuffer_offset)
                })
                .unwrap_or(false)
            {
                // Hover triggered from same location as last time. Don't show again.
                return;
            } else {
                hide_hover(editor, cx);
            }
        }
    }

    // Get input anchor
    let anchor = snapshot
        .buffer_snapshot
        .anchor_at(multibuffer_offset, Bias::Left);

    // Don't request again if the location is the same as the previous request
    if let Some(triggered_from) = &editor.hover_state.triggered_from {
        if triggered_from
            .cmp(&anchor, &snapshot.buffer_snapshot)
            .is_eq()
        {
            return;
        }
    }

    let task = cx.spawn(|this, mut cx| {
        async move {
            // If we need to delay, delay a set amount initially before making the lsp request
            let delay = if !ignore_timeout {
                // Construct delay task to wait for later
                let total_delay = Some(
                    cx.background()
                        .timer(Duration::from_millis(HOVER_DELAY_MILLIS)),
                );

                cx.background()
                    .timer(Duration::from_millis(HOVER_REQUEST_DELAY_MILLIS))
                    .await;
                total_delay
            } else {
                None
            };

            // query the LSP for hover info
            let hover_request = cx.update(|cx| {
                project.update(cx, |project, cx| {
                    project.hover(&buffer, buffer_position, cx)
                })
            });

            if let Some(delay) = delay {
                delay.await;
            }

            // If there's a diagnostic, assign it on the hover state and notify
            let local_diagnostic = snapshot
                .buffer_snapshot
                .diagnostics_in_range::<_, usize>(multibuffer_offset..multibuffer_offset, false)
                // Find the entry with the most specific range
                .min_by_key(|entry| entry.range.end - entry.range.start)
                .map(|entry| DiagnosticEntry {
                    diagnostic: entry.diagnostic,
                    range: entry.range.to_anchors(&snapshot.buffer_snapshot),
                });

            // Pull the primary diagnostic out so we can jump to it if the popover is clicked
            let primary_diagnostic = local_diagnostic.as_ref().and_then(|local_diagnostic| {
                snapshot
                    .buffer_snapshot
                    .diagnostic_group::<usize>(local_diagnostic.diagnostic.group_id)
                    .find(|diagnostic| diagnostic.diagnostic.is_primary)
                    .map(|entry| DiagnosticEntry {
                        diagnostic: entry.diagnostic,
                        range: entry.range.to_anchors(&snapshot.buffer_snapshot),
                    })
            });

            this.update(&mut cx, |this, _| {
                this.hover_state.diagnostic_popover =
                    local_diagnostic.map(|local_diagnostic| DiagnosticPopover {
                        local_diagnostic,
                        primary_diagnostic,
                    });
            })?;

            let hover_result = hover_request.await.ok().flatten();
            let hover_popover = match hover_result {
                Some(hover_result) if !hover_result.is_empty() => {
                    // Create symbol range of anchors for highlighting and filtering of future requests.
                    let range = if let Some(range) = hover_result.range {
                        let start = snapshot
                            .buffer_snapshot
                            .anchor_in_excerpt(excerpt_id.clone(), range.start);
                        let end = snapshot
                            .buffer_snapshot
                            .anchor_in_excerpt(excerpt_id.clone(), range.end);

                        start..end
                    } else {
                        anchor..anchor
                    };

                    let language_registry = project.update(&mut cx, |p, _| p.languages().clone());
                    let blocks = hover_result.contents;
                    let language = hover_result.language;
                    let parsed_content = parse_blocks(&blocks, &language_registry, language).await;

                    Some(InfoPopover {
                        project: project.clone(),
                        symbol_range: RangeInEditor::Text(range),
                        blocks,
                        parsed_content,
                    })
                }

                _ => None,
            };

            this.update(&mut cx, |this, cx| {
                if let Some(symbol_range) = hover_popover
                    .as_ref()
                    .and_then(|hover_popover| hover_popover.symbol_range.as_text_range())
                {
                    // Highlight the selected symbol using a background highlight
                    this.highlight_background::<HoverState>(
                        vec![symbol_range],
                        |theme| theme.editor.hover_popover.highlight,
                        cx,
                    );
                } else {
                    this.clear_background_highlights::<HoverState>(cx);
                }

                this.hover_state.info_popover = hover_popover;
                cx.notify();
            })?;

            Ok::<_, anyhow::Error>(())
        }
        .log_err()
    });

    editor.hover_state.info_task = Some(task);
}

async fn parse_blocks(
    blocks: &[HoverBlock],
    language_registry: &Arc<LanguageRegistry>,
    language: Option<Arc<Language>>,
) -> markdown::ParsedMarkdown {
    let mut text = String::new();
    let mut highlights = Vec::new();
    let mut region_ranges = Vec::new();
    let mut regions = Vec::new();

    for block in blocks {
        match &block.kind {
            HoverBlockKind::PlainText => {
                markdown::new_paragraph(&mut text, &mut Vec::new());
                text.push_str(&block.text);
            }

            HoverBlockKind::Markdown => {
                markdown::parse_markdown_block(
                    &block.text,
                    language_registry,
                    language.clone(),
                    &mut text,
                    &mut highlights,
                    &mut region_ranges,
                    &mut regions,
                )
                .await
            }

            HoverBlockKind::Code { language } => {
                if let Some(language) = language_registry
                    .language_for_name(language)
                    .now_or_never()
                    .and_then(Result::ok)
                {
                    markdown::highlight_code(&mut text, &mut highlights, &block.text, &language);
                } else {
                    text.push_str(&block.text);
                }
            }
        }
    }

    ParsedMarkdown {
        text: text.trim().to_string(),
        highlights,
        region_ranges,
        regions,
    }
}

#[derive(Default)]
pub struct HoverState {
    pub info_popover: Option<InfoPopover>,
    pub diagnostic_popover: Option<DiagnosticPopover>,
    pub triggered_from: Option<Anchor>,
    pub info_task: Option<Task<Option<()>>>,
}

impl HoverState {
    pub fn visible(&self) -> bool {
        self.info_popover.is_some() || self.diagnostic_popover.is_some()
    }

    pub fn render(
        &mut self,
        snapshot: &EditorSnapshot,
        style: &EditorStyle,
        visible_rows: Range<u32>,
        workspace: Option<WeakView<Workspace>>,
        cx: &mut ViewContext<Editor>,
    ) -> Option<(DisplayPoint, Vec<AnyElement<Editor>>)> {
        // If there is a diagnostic, position the popovers based on that.
        // Otherwise use the start of the hover range
        let anchor = self
            .diagnostic_popover
            .as_ref()
            .map(|diagnostic_popover| &diagnostic_popover.local_diagnostic.range.start)
            .or_else(|| {
                self.info_popover
                    .as_ref()
                    .map(|info_popover| match &info_popover.symbol_range {
                        RangeInEditor::Text(range) => &range.start,
                        RangeInEditor::Inlay(range) => &range.inlay_position,
                    })
            })?;
        let point = anchor.to_display_point(&snapshot.display_snapshot);

        // Don't render if the relevant point isn't on screen
        if !self.visible() || !visible_rows.contains(&point.row()) {
            return None;
        }

        let mut elements = Vec::new();

        if let Some(diagnostic_popover) = self.diagnostic_popover.as_ref() {
            elements.push(diagnostic_popover.render(style, cx));
        }
        if let Some(info_popover) = self.info_popover.as_mut() {
            elements.push(info_popover.render(style, workspace, cx));
        }

        Some((point, elements))
    }
}

#[derive(Debug, Clone)]
pub struct InfoPopover {
    pub project: Model<Project>,
    symbol_range: RangeInEditor,
    pub blocks: Vec<HoverBlock>,
    parsed_content: ParsedMarkdown,
}

// impl InfoPopover {
//     pub fn render(
//         &mut self,
//         style: &EditorStyle,
//         workspace: Option<WeakView<Workspace>>,
//         cx: &mut ViewContext<Editor>,
//     ) -> AnyElement<Editor> {
//         MouseEventHandler::new::<InfoPopover, _>(0, cx, |_, cx| {
//             Flex::column()
//                 .scrollable::<HoverBlock>(0, None, cx)
//                 .with_child(crate::render_parsed_markdown::<HoverBlock>(
//                     &self.parsed_content,
//                     style,
//                     workspace,
//                     cx,
//                 ))
//                 .contained()
//                 .with_style(style.hover_popover.container)
//         })
//         .on_move(|_, _, _| {}) // Consume move events so they don't reach regions underneath.
//         .with_cursor_style(CursorStyle::Arrow)
//         .with_padding(Padding {
//             bottom: HOVER_POPOVER_GAP,
//             top: HOVER_POPOVER_GAP,
//             ..Default::default()
//         })
//         .into_any()
//     }
// }

#[derive(Debug, Clone)]
pub struct DiagnosticPopover {
    local_diagnostic: DiagnosticEntry<Anchor>,
    primary_diagnostic: Option<DiagnosticEntry<Anchor>>,
}

impl DiagnosticPopover {
    pub fn render(&self, style: &EditorStyle, cx: &mut ViewContext<Editor>) -> AnyElement<Editor> {
        todo!()
        // enum PrimaryDiagnostic {}

        // let mut text_style = style.hover_popover.prose.clone();
        // text_style.font_size = style.text.font_size;
        // let diagnostic_source_style = style.hover_popover.diagnostic_source_highlight.clone();

        // let text = match &self.local_diagnostic.diagnostic.source {
        //     Some(source) => Text::new(
        //         format!("{source}: {}", self.local_diagnostic.diagnostic.message),
        //         text_style,
        //     )
        //     .with_highlights(vec![(0..source.len(), diagnostic_source_style)]),

        //     None => Text::new(self.local_diagnostic.diagnostic.message.clone(), text_style),
        // };

        // let container_style = match self.local_diagnostic.diagnostic.severity {
        //     DiagnosticSeverity::HINT => style.hover_popover.info_container,
        //     DiagnosticSeverity::INFORMATION => style.hover_popover.info_container,
        //     DiagnosticSeverity::WARNING => style.hover_popover.warning_container,
        //     DiagnosticSeverity::ERROR => style.hover_popover.error_container,
        //     _ => style.hover_popover.container,
        // };

        // let tooltip_style = theme::current(cx).tooltip.clone();

        // MouseEventHandler::new::<DiagnosticPopover, _>(0, cx, |_, _| {
        //     text.with_soft_wrap(true)
        //         .contained()
        //         .with_style(container_style)
        // })
        // .with_padding(Padding {
        //     top: HOVER_POPOVER_GAP,
        //     bottom: HOVER_POPOVER_GAP,
        //     ..Default::default()
        // })
        // .on_move(|_, _, _| {}) // Consume move events so they don't reach regions underneath.
        // .on_click(MouseButton::Left, |_, this, cx| {
        //     this.go_to_diagnostic(&Default::default(), cx)
        // })
        // .with_cursor_style(CursorStyle::PointingHand)
        // .with_tooltip::<PrimaryDiagnostic>(
        //     0,
        //     "Go To Diagnostic".to_string(),
        //     Some(Box::new(crate::GoToDiagnostic)),
        //     tooltip_style,
        //     cx,
        // )
        // .into_any()
    }

    pub fn activation_info(&self) -> (usize, Anchor) {
        let entry = self
            .primary_diagnostic
            .as_ref()
            .unwrap_or(&self.local_diagnostic);

        (entry.diagnostic.group_id, entry.range.start.clone())
    }
}

// #[cfg(test)]
// mod tests {
//     use super::*;
//     use crate::{
//         editor_tests::init_test,
//         element::PointForPosition,
//         inlay_hint_cache::tests::{cached_hint_labels, visible_hint_labels},
//         link_go_to_definition::update_inlay_link_and_hover_points,
//         test::editor_lsp_test_context::EditorLspTestContext,
//         InlayId,
//     };
//     use collections::BTreeSet;
//     use gpui::fonts::{HighlightStyle, Underline, Weight};
//     use indoc::indoc;
//     use language::{language_settings::InlayHintSettings, Diagnostic, DiagnosticSet};
//     use lsp::LanguageServerId;
//     use project::{HoverBlock, HoverBlockKind};
//     use smol::stream::StreamExt;
//     use unindent::Unindent;
//     use util::test::marked_text_ranges;

//     #[gpui::test]
//     async fn test_mouse_hover_info_popover(cx: &mut gpui::TestAppContext) {
//         init_test(cx, |_| {});

//         let mut cx = EditorLspTestContext::new_rust(
//             lsp::ServerCapabilities {
//                 hover_provider: Some(lsp::HoverProviderCapability::Simple(true)),
//                 ..Default::default()
//             },
//             cx,
//         )
//         .await;

//         // Basic hover delays and then pops without moving the mouse
//         cx.set_state(indoc! {"
//             fn ˇtest() { println!(); }
//         "});
//         let hover_point = cx.display_point(indoc! {"
//             fn test() { printˇln!(); }
//         "});

//         cx.update_editor(|editor, cx| hover_at(editor, Some(hover_point), cx));
//         assert!(!cx.editor(|editor, _| editor.hover_state.visible()));

//         // After delay, hover should be visible.
//         let symbol_range = cx.lsp_range(indoc! {"
//             fn test() { «println!»(); }
//         "});
//         let mut requests =
//             cx.handle_request::<lsp::request::HoverRequest, _, _>(move |_, _, _| async move {
//                 Ok(Some(lsp::Hover {
//                     contents: lsp::HoverContents::Markup(lsp::MarkupContent {
//                         kind: lsp::MarkupKind::Markdown,
//                         value: "some basic docs".to_string(),
//                     }),
//                     range: Some(symbol_range),
//                 }))
//             });
//         cx.foreground()
//             .advance_clock(Duration::from_millis(HOVER_DELAY_MILLIS + 100));
//         requests.next().await;

//         cx.editor(|editor, _| {
//             assert!(editor.hover_state.visible());
//             assert_eq!(
//                 editor.hover_state.info_popover.clone().unwrap().blocks,
//                 vec![HoverBlock {
//                     text: "some basic docs".to_string(),
//                     kind: HoverBlockKind::Markdown,
//                 },]
//             )
//         });

//         // Mouse moved with no hover response dismisses
//         let hover_point = cx.display_point(indoc! {"
//             fn teˇst() { println!(); }
//         "});
//         let mut request = cx
//             .lsp
//             .handle_request::<lsp::request::HoverRequest, _, _>(|_, _| async move { Ok(None) });
//         cx.update_editor(|editor, cx| hover_at(editor, Some(hover_point), cx));
//         cx.foreground()
//             .advance_clock(Duration::from_millis(HOVER_DELAY_MILLIS + 100));
//         request.next().await;
//         cx.editor(|editor, _| {
//             assert!(!editor.hover_state.visible());
//         });
//     }

//     #[gpui::test]
//     async fn test_keyboard_hover_info_popover(cx: &mut gpui::TestAppContext) {
//         init_test(cx, |_| {});

//         let mut cx = EditorLspTestContext::new_rust(
//             lsp::ServerCapabilities {
//                 hover_provider: Some(lsp::HoverProviderCapability::Simple(true)),
//                 ..Default::default()
//             },
//             cx,
//         )
//         .await;

//         // Hover with keyboard has no delay
//         cx.set_state(indoc! {"
//             fˇn test() { println!(); }
//         "});
//         cx.update_editor(|editor, cx| hover(editor, &Hover, cx));
//         let symbol_range = cx.lsp_range(indoc! {"
//             «fn» test() { println!(); }
//         "});
//         cx.handle_request::<lsp::request::HoverRequest, _, _>(move |_, _, _| async move {
//             Ok(Some(lsp::Hover {
//                 contents: lsp::HoverContents::Markup(lsp::MarkupContent {
//                     kind: lsp::MarkupKind::Markdown,
//                     value: "some other basic docs".to_string(),
//                 }),
//                 range: Some(symbol_range),
//             }))
//         })
//         .next()
//         .await;

//         cx.condition(|editor, _| editor.hover_state.visible()).await;
//         cx.editor(|editor, _| {
//             assert_eq!(
//                 editor.hover_state.info_popover.clone().unwrap().blocks,
//                 vec![HoverBlock {
//                     text: "some other basic docs".to_string(),
//                     kind: HoverBlockKind::Markdown,
//                 }]
//             )
//         });
//     }

//     #[gpui::test]
//     async fn test_empty_hovers_filtered(cx: &mut gpui::TestAppContext) {
//         init_test(cx, |_| {});

//         let mut cx = EditorLspTestContext::new_rust(
//             lsp::ServerCapabilities {
//                 hover_provider: Some(lsp::HoverProviderCapability::Simple(true)),
//                 ..Default::default()
//             },
//             cx,
//         )
//         .await;

//         // Hover with keyboard has no delay
//         cx.set_state(indoc! {"
//             fˇn test() { println!(); }
//         "});
//         cx.update_editor(|editor, cx| hover(editor, &Hover, cx));
//         let symbol_range = cx.lsp_range(indoc! {"
//             «fn» test() { println!(); }
//         "});
//         cx.handle_request::<lsp::request::HoverRequest, _, _>(move |_, _, _| async move {
//             Ok(Some(lsp::Hover {
//                 contents: lsp::HoverContents::Array(vec![
//                     lsp::MarkedString::String("regular text for hover to show".to_string()),
//                     lsp::MarkedString::String("".to_string()),
//                     lsp::MarkedString::LanguageString(lsp::LanguageString {
//                         language: "Rust".to_string(),
//                         value: "".to_string(),
//                     }),
//                 ]),
//                 range: Some(symbol_range),
//             }))
//         })
//         .next()
//         .await;

//         cx.condition(|editor, _| editor.hover_state.visible()).await;
//         cx.editor(|editor, _| {
//             assert_eq!(
//                 editor.hover_state.info_popover.clone().unwrap().blocks,
//                 vec![HoverBlock {
//                     text: "regular text for hover to show".to_string(),
//                     kind: HoverBlockKind::Markdown,
//                 }],
//                 "No empty string hovers should be shown"
//             );
//         });
//     }

//     #[gpui::test]
//     async fn test_line_ends_trimmed(cx: &mut gpui::TestAppContext) {
//         init_test(cx, |_| {});

//         let mut cx = EditorLspTestContext::new_rust(
//             lsp::ServerCapabilities {
//                 hover_provider: Some(lsp::HoverProviderCapability::Simple(true)),
//                 ..Default::default()
//             },
//             cx,
//         )
//         .await;

//         // Hover with keyboard has no delay
//         cx.set_state(indoc! {"
//             fˇn test() { println!(); }
//         "});
//         cx.update_editor(|editor, cx| hover(editor, &Hover, cx));
//         let symbol_range = cx.lsp_range(indoc! {"
//             «fn» test() { println!(); }
//         "});

//         let code_str = "\nlet hovered_point: Vector2F // size = 8, align = 0x4\n";
//         let markdown_string = format!("\n```rust\n{code_str}```");

//         let closure_markdown_string = markdown_string.clone();
//         cx.handle_request::<lsp::request::HoverRequest, _, _>(move |_, _, _| {
//             let future_markdown_string = closure_markdown_string.clone();
//             async move {
//                 Ok(Some(lsp::Hover {
//                     contents: lsp::HoverContents::Markup(lsp::MarkupContent {
//                         kind: lsp::MarkupKind::Markdown,
//                         value: future_markdown_string,
//                     }),
//                     range: Some(symbol_range),
//                 }))
//             }
//         })
//         .next()
//         .await;

//         cx.condition(|editor, _| editor.hover_state.visible()).await;
//         cx.editor(|editor, _| {
//             let blocks = editor.hover_state.info_popover.clone().unwrap().blocks;
//             assert_eq!(
//                 blocks,
//                 vec![HoverBlock {
//                     text: markdown_string,
//                     kind: HoverBlockKind::Markdown,
//                 }],
//             );

//             let rendered = smol::block_on(parse_blocks(&blocks, &Default::default(), None));
//             assert_eq!(
//                 rendered.text,
//                 code_str.trim(),
//                 "Should not have extra line breaks at end of rendered hover"
//             );
//         });
//     }

//     #[gpui::test]
//     async fn test_hover_diagnostic_and_info_popovers(cx: &mut gpui::TestAppContext) {
//         init_test(cx, |_| {});

//         let mut cx = EditorLspTestContext::new_rust(
//             lsp::ServerCapabilities {
//                 hover_provider: Some(lsp::HoverProviderCapability::Simple(true)),
//                 ..Default::default()
//             },
//             cx,
//         )
//         .await;

//         // Hover with just diagnostic, pops DiagnosticPopover immediately and then
//         // info popover once request completes
//         cx.set_state(indoc! {"
//             fn teˇst() { println!(); }
//         "});

//         // Send diagnostic to client
//         let range = cx.text_anchor_range(indoc! {"
//             fn «test»() { println!(); }
//         "});
//         cx.update_buffer(|buffer, cx| {
//             let snapshot = buffer.text_snapshot();
//             let set = DiagnosticSet::from_sorted_entries(
//                 vec![DiagnosticEntry {
//                     range,
//                     diagnostic: Diagnostic {
//                         message: "A test diagnostic message.".to_string(),
//                         ..Default::default()
//                     },
//                 }],
//                 &snapshot,
//             );
//             buffer.update_diagnostics(LanguageServerId(0), set, cx);
//         });

//         // Hover pops diagnostic immediately
//         cx.update_editor(|editor, cx| hover(editor, &Hover, cx));
//         cx.foreground().run_until_parked();

//         cx.editor(|Editor { hover_state, .. }, _| {
//             assert!(hover_state.diagnostic_popover.is_some() && hover_state.info_popover.is_none())
//         });

//         // Info Popover shows after request responded to
//         let range = cx.lsp_range(indoc! {"
//             fn «test»() { println!(); }
//         "});
//         cx.handle_request::<lsp::request::HoverRequest, _, _>(move |_, _, _| async move {
//             Ok(Some(lsp::Hover {
//                 contents: lsp::HoverContents::Markup(lsp::MarkupContent {
//                     kind: lsp::MarkupKind::Markdown,
//                     value: "some new docs".to_string(),
//                 }),
//                 range: Some(range),
//             }))
//         });
//         cx.foreground()
//             .advance_clock(Duration::from_millis(HOVER_DELAY_MILLIS + 100));

//         cx.foreground().run_until_parked();
//         cx.editor(|Editor { hover_state, .. }, _| {
//             hover_state.diagnostic_popover.is_some() && hover_state.info_task.is_some()
//         });
//     }

//     #[gpui::test]
//     fn test_render_blocks(cx: &mut gpui::TestAppContext) {
//         init_test(cx, |_| {});

//         cx.add_window(|cx| {
//             let editor = Editor::single_line(None, cx);
//             let style = editor.style(cx);

//             struct Row {
//                 blocks: Vec<HoverBlock>,
//                 expected_marked_text: String,
//                 expected_styles: Vec<HighlightStyle>,
//             }

//             let rows = &[
//                 // Strong emphasis
//                 Row {
//                     blocks: vec![HoverBlock {
//                         text: "one **two** three".to_string(),
//                         kind: HoverBlockKind::Markdown,
//                     }],
//                     expected_marked_text: "one «two» three".to_string(),
//                     expected_styles: vec![HighlightStyle {
//                         weight: Some(Weight::BOLD),
//                         ..Default::default()
//                     }],
//                 },
//                 // Links
//                 Row {
//                     blocks: vec![HoverBlock {
//                         text: "one [two](https://the-url) three".to_string(),
//                         kind: HoverBlockKind::Markdown,
//                     }],
//                     expected_marked_text: "one «two» three".to_string(),
//                     expected_styles: vec![HighlightStyle {
//                         underline: Some(Underline {
//                             thickness: 1.0.into(),
//                             ..Default::default()
//                         }),
//                         ..Default::default()
//                     }],
//                 },
//                 // Lists
//                 Row {
//                     blocks: vec![HoverBlock {
//                         text: "
//                             lists:
//                             * one
//                                 - a
//                                 - b
//                             * two
//                                 - [c](https://the-url)
//                                 - d"
//                         .unindent(),
//                         kind: HoverBlockKind::Markdown,
//                     }],
//                     expected_marked_text: "
//                         lists:
//                         - one
//                           - a
//                           - b
//                         - two
//                           - «c»
//                           - d"
//                     .unindent(),
//                     expected_styles: vec![HighlightStyle {
//                         underline: Some(Underline {
//                             thickness: 1.0.into(),
//                             ..Default::default()
//                         }),
//                         ..Default::default()
//                     }],
//                 },
//                 // Multi-paragraph list items
//                 Row {
//                     blocks: vec![HoverBlock {
//                         text: "
//                             * one two
//                               three

//                             * four five
//                                 * six seven
//                                   eight

//                                   nine
//                                 * ten
//                             * six"
//                             .unindent(),
//                         kind: HoverBlockKind::Markdown,
//                     }],
//                     expected_marked_text: "
//                         - one two three
//                         - four five
//                           - six seven eight

//                             nine
//                           - ten
//                         - six"
//                         .unindent(),
//                     expected_styles: vec![HighlightStyle {
//                         underline: Some(Underline {
//                             thickness: 1.0.into(),
//                             ..Default::default()
//                         }),
//                         ..Default::default()
//                     }],
//                 },
//             ];

//             for Row {
//                 blocks,
//                 expected_marked_text,
//                 expected_styles,
//             } in &rows[0..]
//             {
//                 let rendered = smol::block_on(parse_blocks(&blocks, &Default::default(), None));

//                 let (expected_text, ranges) = marked_text_ranges(expected_marked_text, false);
//                 let expected_highlights = ranges
//                     .into_iter()
//                     .zip(expected_styles.iter().cloned())
//                     .collect::<Vec<_>>();
//                 assert_eq!(
//                     rendered.text, expected_text,
//                     "wrong text for input {blocks:?}"
//                 );

//                 let rendered_highlights: Vec<_> = rendered
//                     .highlights
//                     .iter()
//                     .filter_map(|(range, highlight)| {
//                         let highlight = highlight.to_highlight_style(&style.syntax)?;
//                         Some((range.clone(), highlight))
//                     })
//                     .collect();

//                 assert_eq!(
//                     rendered_highlights, expected_highlights,
//                     "wrong highlights for input {blocks:?}"
//                 );
//             }

//             editor
//         });
//     }

//     #[gpui::test]
//     async fn test_hover_inlay_label_parts(cx: &mut gpui::TestAppContext) {
//         init_test(cx, |settings| {
//             settings.defaults.inlay_hints = Some(InlayHintSettings {
//                 enabled: true,
//                 show_type_hints: true,
//                 show_parameter_hints: true,
//                 show_other_hints: true,
//             })
//         });

//         let mut cx = EditorLspTestContext::new_rust(
//             lsp::ServerCapabilities {
//                 inlay_hint_provider: Some(lsp::OneOf::Right(
//                     lsp::InlayHintServerCapabilities::Options(lsp::InlayHintOptions {
//                         resolve_provider: Some(true),
//                         ..Default::default()
//                     }),
//                 )),
//                 ..Default::default()
//             },
//             cx,
//         )
//         .await;

//         cx.set_state(indoc! {"
//             struct TestStruct;

//             // ==================

//             struct TestNewType<T>(T);

//             fn main() {
//                 let variableˇ = TestNewType(TestStruct);
//             }
//         "});

//         let hint_start_offset = cx.ranges(indoc! {"
//             struct TestStruct;

//             // ==================

//             struct TestNewType<T>(T);

//             fn main() {
//                 let variableˇ = TestNewType(TestStruct);
//             }
//         "})[0]
//             .start;
//         let hint_position = cx.to_lsp(hint_start_offset);
//         let new_type_target_range = cx.lsp_range(indoc! {"
//             struct TestStruct;

//             // ==================

//             struct «TestNewType»<T>(T);

//             fn main() {
//                 let variable = TestNewType(TestStruct);
//             }
//         "});
//         let struct_target_range = cx.lsp_range(indoc! {"
//             struct «TestStruct»;

//             // ==================

//             struct TestNewType<T>(T);

//             fn main() {
//                 let variable = TestNewType(TestStruct);
//             }
//         "});

//         let uri = cx.buffer_lsp_url.clone();
//         let new_type_label = "TestNewType";
//         let struct_label = "TestStruct";
//         let entire_hint_label = ": TestNewType<TestStruct>";
//         let closure_uri = uri.clone();
//         cx.lsp
//             .handle_request::<lsp::request::InlayHintRequest, _, _>(move |params, _| {
//                 let task_uri = closure_uri.clone();
//                 async move {
//                     assert_eq!(params.text_document.uri, task_uri);
//                     Ok(Some(vec![lsp::InlayHint {
//                         position: hint_position,
//                         label: lsp::InlayHintLabel::LabelParts(vec![lsp::InlayHintLabelPart {
//                             value: entire_hint_label.to_string(),
//                             ..Default::default()
//                         }]),
//                         kind: Some(lsp::InlayHintKind::TYPE),
//                         text_edits: None,
//                         tooltip: None,
//                         padding_left: Some(false),
//                         padding_right: Some(false),
//                         data: None,
//                     }]))
//                 }
//             })
//             .next()
//             .await;
//         cx.foreground().run_until_parked();
//         cx.update_editor(|editor, cx| {
//             let expected_layers = vec![entire_hint_label.to_string()];
//             assert_eq!(expected_layers, cached_hint_labels(editor));
//             assert_eq!(expected_layers, visible_hint_labels(editor, cx));
//         });

//         let inlay_range = cx
//             .ranges(indoc! {"
//                 struct TestStruct;

//                 // ==================

//                 struct TestNewType<T>(T);

//                 fn main() {
//                     let variable« »= TestNewType(TestStruct);
//                 }
//         "})
//             .get(0)
//             .cloned()
//             .unwrap();
//         let new_type_hint_part_hover_position = cx.update_editor(|editor, cx| {
//             let snapshot = editor.snapshot(cx);
//             let previous_valid = inlay_range.start.to_display_point(&snapshot);
//             let next_valid = inlay_range.end.to_display_point(&snapshot);
//             assert_eq!(previous_valid.row(), next_valid.row());
//             assert!(previous_valid.column() < next_valid.column());
//             let exact_unclipped = DisplayPoint::new(
//                 previous_valid.row(),
//                 previous_valid.column()
//                     + (entire_hint_label.find(new_type_label).unwrap() + new_type_label.len() / 2)
//                         as u32,
//             );
//             PointForPosition {
//                 previous_valid,
//                 next_valid,
//                 exact_unclipped,
//                 column_overshoot_after_line_end: 0,
//             }
//         });
//         cx.update_editor(|editor, cx| {
//             update_inlay_link_and_hover_points(
//                 &editor.snapshot(cx),
//                 new_type_hint_part_hover_position,
//                 editor,
//                 true,
//                 false,
//                 cx,
//             );
//         });

//         let resolve_closure_uri = uri.clone();
//         cx.lsp
//             .handle_request::<lsp::request::InlayHintResolveRequest, _, _>(
//                 move |mut hint_to_resolve, _| {
//                     let mut resolved_hint_positions = BTreeSet::new();
//                     let task_uri = resolve_closure_uri.clone();
//                     async move {
//                         let inserted = resolved_hint_positions.insert(hint_to_resolve.position);
//                         assert!(inserted, "Hint {hint_to_resolve:?} was resolved twice");

//                         // `: TestNewType<TestStruct>`
//                         hint_to_resolve.label = lsp::InlayHintLabel::LabelParts(vec![
//                             lsp::InlayHintLabelPart {
//                                 value: ": ".to_string(),
//                                 ..Default::default()
//                             },
//                             lsp::InlayHintLabelPart {
//                                 value: new_type_label.to_string(),
//                                 location: Some(lsp::Location {
//                                     uri: task_uri.clone(),
//                                     range: new_type_target_range,
//                                 }),
//                                 tooltip: Some(lsp::InlayHintLabelPartTooltip::String(format!(
//                                     "A tooltip for `{new_type_label}`"
//                                 ))),
//                                 ..Default::default()
//                             },
//                             lsp::InlayHintLabelPart {
//                                 value: "<".to_string(),
//                                 ..Default::default()
//                             },
//                             lsp::InlayHintLabelPart {
//                                 value: struct_label.to_string(),
//                                 location: Some(lsp::Location {
//                                     uri: task_uri,
//                                     range: struct_target_range,
//                                 }),
//                                 tooltip: Some(lsp::InlayHintLabelPartTooltip::MarkupContent(
//                                     lsp::MarkupContent {
//                                         kind: lsp::MarkupKind::Markdown,
//                                         value: format!("A tooltip for `{struct_label}`"),
//                                     },
//                                 )),
//                                 ..Default::default()
//                             },
//                             lsp::InlayHintLabelPart {
//                                 value: ">".to_string(),
//                                 ..Default::default()
//                             },
//                         ]);

//                         Ok(hint_to_resolve)
//                     }
//                 },
//             )
//             .next()
//             .await;
//         cx.foreground().run_until_parked();

//         cx.update_editor(|editor, cx| {
//             update_inlay_link_and_hover_points(
//                 &editor.snapshot(cx),
//                 new_type_hint_part_hover_position,
//                 editor,
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground()
//             .advance_clock(Duration::from_millis(HOVER_DELAY_MILLIS + 100));
//         cx.foreground().run_until_parked();
//         cx.update_editor(|editor, cx| {
//             let hover_state = &editor.hover_state;
//             assert!(hover_state.diagnostic_popover.is_none() && hover_state.info_popover.is_some());
//             let popover = hover_state.info_popover.as_ref().unwrap();
//             let buffer_snapshot = editor.buffer().update(cx, |buffer, cx| buffer.snapshot(cx));
//             assert_eq!(
//                 popover.symbol_range,
//                 RangeInEditor::Inlay(InlayHighlight {
//                     inlay: InlayId::Hint(0),
//                     inlay_position: buffer_snapshot.anchor_at(inlay_range.start, Bias::Right),
//                     range: ": ".len()..": ".len() + new_type_label.len(),
//                 }),
//                 "Popover range should match the new type label part"
//             );
//             assert_eq!(
//                 popover.parsed_content.text,
//                 format!("A tooltip for `{new_type_label}`"),
//                 "Rendered text should not anyhow alter backticks"
//             );
//         });

//         let struct_hint_part_hover_position = cx.update_editor(|editor, cx| {
//             let snapshot = editor.snapshot(cx);
//             let previous_valid = inlay_range.start.to_display_point(&snapshot);
//             let next_valid = inlay_range.end.to_display_point(&snapshot);
//             assert_eq!(previous_valid.row(), next_valid.row());
//             assert!(previous_valid.column() < next_valid.column());
//             let exact_unclipped = DisplayPoint::new(
//                 previous_valid.row(),
//                 previous_valid.column()
//                     + (entire_hint_label.find(struct_label).unwrap() + struct_label.len() / 2)
//                         as u32,
//             );
//             PointForPosition {
//                 previous_valid,
//                 next_valid,
//                 exact_unclipped,
//                 column_overshoot_after_line_end: 0,
//             }
//         });
//         cx.update_editor(|editor, cx| {
//             update_inlay_link_and_hover_points(
//                 &editor.snapshot(cx),
//                 struct_hint_part_hover_position,
//                 editor,
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground()
//             .advance_clock(Duration::from_millis(HOVER_DELAY_MILLIS + 100));
//         cx.foreground().run_until_parked();
//         cx.update_editor(|editor, cx| {
//             let hover_state = &editor.hover_state;
//             assert!(hover_state.diagnostic_popover.is_none() && hover_state.info_popover.is_some());
//             let popover = hover_state.info_popover.as_ref().unwrap();
//             let buffer_snapshot = editor.buffer().update(cx, |buffer, cx| buffer.snapshot(cx));
//             assert_eq!(
//                 popover.symbol_range,
//                 RangeInEditor::Inlay(InlayHighlight {
//                     inlay: InlayId::Hint(0),
//                     inlay_position: buffer_snapshot.anchor_at(inlay_range.start, Bias::Right),
//                     range: ": ".len() + new_type_label.len() + "<".len()
//                         ..": ".len() + new_type_label.len() + "<".len() + struct_label.len(),
//                 }),
//                 "Popover range should match the struct label part"
//             );
//             assert_eq!(
//                 popover.parsed_content.text,
//                 format!("A tooltip for {struct_label}"),
//                 "Rendered markdown element should remove backticks from text"
//             );
//         });
//     }
// }