use crate::{
    display_map::DisplaySnapshot,
    element::PointForPosition,
    hover_popover::{self, InlayHover},
    Anchor, DisplayPoint, Editor, EditorSnapshot, GoToDefinition, GoToTypeDefinition, InlayId,
    SelectPhase,
};
use gpui::{Task, ViewContext};
use language::{Bias, ToOffset};
use lsp::LanguageServerId;
use project::{
    HoverBlock, HoverBlockKind, InlayHintLabelPartTooltip, InlayHintTooltip, LocationLink,
    ResolveState,
};
use std::ops::Range;
use util::TryFutureExt;

#[derive(Debug, Default)]
pub struct LinkGoToDefinitionState {
    pub last_trigger_point: Option<TriggerPoint>,
    pub symbol_range: Option<RangeInEditor>,
    pub kind: Option<LinkDefinitionKind>,
    pub definitions: Vec<GoToDefinitionLink>,
    pub task: Option<Task<Option<()>>>,
}

#[derive(Debug, Eq, PartialEq, Clone)]
pub enum RangeInEditor {
    Text(Range<Anchor>),
    Inlay(InlayHighlight),
}

impl RangeInEditor {
    pub fn as_text_range(&self) -> Option<Range<Anchor>> {
        match self {
            Self::Text(range) => Some(range.clone()),
            Self::Inlay(_) => None,
        }
    }

    fn point_within_range(&self, trigger_point: &TriggerPoint, snapshot: &EditorSnapshot) -> bool {
        match (self, trigger_point) {
            (Self::Text(range), TriggerPoint::Text(point)) => {
                let point_after_start = range.start.cmp(point, &snapshot.buffer_snapshot).is_le();
                point_after_start && range.end.cmp(point, &snapshot.buffer_snapshot).is_ge()
            }
            (Self::Inlay(highlight), TriggerPoint::InlayHint(point, _, _)) => {
                highlight.inlay == point.inlay
                    && highlight.range.contains(&point.range.start)
                    && highlight.range.contains(&point.range.end)
            }
            (Self::Inlay(_), TriggerPoint::Text(_))
            | (Self::Text(_), TriggerPoint::InlayHint(_, _, _)) => false,
        }
    }
}

#[derive(Debug)]
pub enum GoToDefinitionTrigger {
    Text(DisplayPoint),
    InlayHint(InlayHighlight, lsp::Location, LanguageServerId),
}

#[derive(Debug, Clone)]
pub enum GoToDefinitionLink {
    Text(LocationLink),
    InlayHint(lsp::Location, LanguageServerId),
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct InlayHighlight {
    pub inlay: InlayId,
    pub inlay_position: Anchor,
    pub range: Range<usize>,
}

#[derive(Debug, Clone)]
pub enum TriggerPoint {
    Text(Anchor),
    InlayHint(InlayHighlight, lsp::Location, LanguageServerId),
}

impl TriggerPoint {
    pub fn definition_kind(&self, shift: bool) -> LinkDefinitionKind {
        match self {
            TriggerPoint::Text(_) => {
                if shift {
                    LinkDefinitionKind::Type
                } else {
                    LinkDefinitionKind::Symbol
                }
            }
            TriggerPoint::InlayHint(_, _, _) => LinkDefinitionKind::Type,
        }
    }

    fn anchor(&self) -> &Anchor {
        match self {
            TriggerPoint::Text(anchor) => anchor,
            TriggerPoint::InlayHint(inlay_range, _, _) => &inlay_range.inlay_position,
        }
    }
}

pub fn update_go_to_definition_link(
    editor: &mut Editor,
    origin: Option<GoToDefinitionTrigger>,
    cmd_held: bool,
    shift_held: bool,
    cx: &mut ViewContext<Editor>,
) {
    let pending_nonempty_selection = editor.has_pending_nonempty_selection();

    // Store new mouse point as an anchor
    let snapshot = editor.snapshot(cx);
    let trigger_point = match origin {
        Some(GoToDefinitionTrigger::Text(p)) => {
            Some(TriggerPoint::Text(snapshot.buffer_snapshot.anchor_before(
                p.to_offset(&snapshot.display_snapshot, Bias::Left),
            )))
        }
        Some(GoToDefinitionTrigger::InlayHint(p, lsp_location, language_server_id)) => {
            Some(TriggerPoint::InlayHint(p, lsp_location, language_server_id))
        }
        None => None,
    };

    // If the new point is the same as the previously stored one, return early
    if let (Some(a), Some(b)) = (
        &trigger_point,
        &editor.link_go_to_definition_state.last_trigger_point,
    ) {
        match (a, b) {
            (TriggerPoint::Text(anchor_a), TriggerPoint::Text(anchor_b)) => {
                if anchor_a.cmp(anchor_b, &snapshot.buffer_snapshot).is_eq() {
                    return;
                }
            }
            (TriggerPoint::InlayHint(range_a, _, _), TriggerPoint::InlayHint(range_b, _, _)) => {
                if range_a == range_b {
                    return;
                }
            }
            _ => {}
        }
    }

    editor.link_go_to_definition_state.last_trigger_point = trigger_point.clone();

    if pending_nonempty_selection {
        hide_link_definition(editor, cx);
        return;
    }

    if cmd_held {
        if let Some(trigger_point) = trigger_point {
            let kind = trigger_point.definition_kind(shift_held);
            show_link_definition(kind, editor, trigger_point, snapshot, cx);
            return;
        }
    }

    hide_link_definition(editor, cx);
}

pub fn update_inlay_link_and_hover_points(
    snapshot: &DisplaySnapshot,
    point_for_position: PointForPosition,
    editor: &mut Editor,
    cmd_held: bool,
    shift_held: bool,
    cx: &mut ViewContext<'_, Editor>,
) {
    let hovered_offset = if point_for_position.column_overshoot_after_line_end == 0 {
        Some(snapshot.display_point_to_inlay_offset(point_for_position.exact_unclipped, Bias::Left))
    } else {
        None
    };
    let mut go_to_definition_updated = false;
    let mut hover_updated = false;
    if let Some(hovered_offset) = hovered_offset {
        let buffer_snapshot = editor.buffer().read(cx).snapshot(cx);
        let previous_valid_anchor = buffer_snapshot.anchor_at(
            point_for_position.previous_valid.to_point(snapshot),
            Bias::Left,
        );
        let next_valid_anchor = buffer_snapshot.anchor_at(
            point_for_position.next_valid.to_point(snapshot),
            Bias::Right,
        );
        if let Some(hovered_hint) = editor
            .visible_inlay_hints(cx)
            .into_iter()
            .skip_while(|hint| {
                hint.position
                    .cmp(&previous_valid_anchor, &buffer_snapshot)
                    .is_lt()
            })
            .take_while(|hint| {
                hint.position
                    .cmp(&next_valid_anchor, &buffer_snapshot)
                    .is_le()
            })
            .max_by_key(|hint| hint.id)
        {
            let inlay_hint_cache = editor.inlay_hint_cache();
            let excerpt_id = previous_valid_anchor.excerpt_id;
            if let Some(cached_hint) = inlay_hint_cache.hint_by_id(excerpt_id, hovered_hint.id) {
                match cached_hint.resolve_state {
                    ResolveState::CanResolve(_, _) => {
                        if let Some(buffer_id) = previous_valid_anchor.buffer_id {
                            inlay_hint_cache.spawn_hint_resolve(
                                buffer_id,
                                excerpt_id,
                                hovered_hint.id,
                                cx,
                            );
                        }
                    }
                    ResolveState::Resolved => {
                        let mut extra_shift_left = 0;
                        let mut extra_shift_right = 0;
                        if cached_hint.padding_left {
                            extra_shift_left += 1;
                            extra_shift_right += 1;
                        }
                        if cached_hint.padding_right {
                            extra_shift_right += 1;
                        }
                        match cached_hint.label {
                            project::InlayHintLabel::String(_) => {
                                if let Some(tooltip) = cached_hint.tooltip {
                                    hover_popover::hover_at_inlay(
                                        editor,
                                        InlayHover {
                                            excerpt: excerpt_id,
                                            tooltip: match tooltip {
                                                InlayHintTooltip::String(text) => HoverBlock {
                                                    text,
                                                    kind: HoverBlockKind::PlainText,
                                                },
                                                InlayHintTooltip::MarkupContent(content) => {
                                                    HoverBlock {
                                                        text: content.value,
                                                        kind: content.kind,
                                                    }
                                                }
                                            },
                                            range: InlayHighlight {
                                                inlay: hovered_hint.id,
                                                inlay_position: hovered_hint.position,
                                                range: extra_shift_left
                                                    ..hovered_hint.text.len() + extra_shift_right,
                                            },
                                        },
                                        cx,
                                    );
                                    hover_updated = true;
                                }
                            }
                            project::InlayHintLabel::LabelParts(label_parts) => {
                                let hint_start =
                                    snapshot.anchor_to_inlay_offset(hovered_hint.position);
                                if let Some((hovered_hint_part, part_range)) =
                                    hover_popover::find_hovered_hint_part(
                                        label_parts,
                                        hint_start,
                                        hovered_offset,
                                    )
                                {
                                    let highlight_start =
                                        (part_range.start - hint_start).0 + extra_shift_left;
                                    let highlight_end =
                                        (part_range.end - hint_start).0 + extra_shift_right;
                                    let highlight = InlayHighlight {
                                        inlay: hovered_hint.id,
                                        inlay_position: hovered_hint.position,
                                        range: highlight_start..highlight_end,
                                    };
                                    if let Some(tooltip) = hovered_hint_part.tooltip {
                                        hover_popover::hover_at_inlay(
                                            editor,
                                            InlayHover {
                                                excerpt: excerpt_id,
                                                tooltip: match tooltip {
                                                    InlayHintLabelPartTooltip::String(text) => {
                                                        HoverBlock {
                                                            text,
                                                            kind: HoverBlockKind::PlainText,
                                                        }
                                                    }
                                                    InlayHintLabelPartTooltip::MarkupContent(
                                                        content,
                                                    ) => HoverBlock {
                                                        text: content.value,
                                                        kind: content.kind,
                                                    },
                                                },
                                                range: highlight.clone(),
                                            },
                                            cx,
                                        );
                                        hover_updated = true;
                                    }
                                    if let Some((language_server_id, location)) =
                                        hovered_hint_part.location
                                    {
                                        go_to_definition_updated = true;
                                        update_go_to_definition_link(
                                            editor,
                                            Some(GoToDefinitionTrigger::InlayHint(
                                                highlight,
                                                location,
                                                language_server_id,
                                            )),
                                            cmd_held,
                                            shift_held,
                                            cx,
                                        );
                                    }
                                }
                            }
                        };
                    }
                    ResolveState::Resolving => {}
                }
            }
        }
    }

    if !go_to_definition_updated {
        update_go_to_definition_link(editor, None, cmd_held, shift_held, cx);
    }
    if !hover_updated {
        hover_popover::hover_at(editor, None, cx);
    }
}

#[derive(Debug, Clone, Copy, PartialEq)]
pub enum LinkDefinitionKind {
    Symbol,
    Type,
}

pub fn show_link_definition(
    definition_kind: LinkDefinitionKind,
    editor: &mut Editor,
    trigger_point: TriggerPoint,
    snapshot: EditorSnapshot,
    cx: &mut ViewContext<Editor>,
) {
    let same_kind = editor.link_go_to_definition_state.kind == Some(definition_kind);
    if !same_kind {
        hide_link_definition(editor, cx);
    }

    if editor.pending_rename.is_some() {
        return;
    }

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

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

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

    // Don't request again if the location is within the symbol region of a previous request with the same kind
    if let Some(symbol_range) = &editor.link_go_to_definition_state.symbol_range {
        if same_kind && symbol_range.point_within_range(&trigger_point, &snapshot) {
            return;
        }
    }

    let task = cx.spawn(|this, mut cx| {
        async move {
            let result = match &trigger_point {
                TriggerPoint::Text(_) => {
                    // query the LSP for definition info
                    project
                        .update(&mut cx, |project, cx| match definition_kind {
                            LinkDefinitionKind::Symbol => {
                                project.definition(&buffer, buffer_position, cx)
                            }

                            LinkDefinitionKind::Type => {
                                project.type_definition(&buffer, buffer_position, cx)
                            }
                        })?
                        .await
                        .ok()
                        .map(|definition_result| {
                            (
                                definition_result.iter().find_map(|link| {
                                    link.origin.as_ref().map(|origin| {
                                        let start = snapshot.buffer_snapshot.anchor_in_excerpt(
                                            excerpt_id.clone(),
                                            origin.range.start,
                                        );
                                        let end = snapshot.buffer_snapshot.anchor_in_excerpt(
                                            excerpt_id.clone(),
                                            origin.range.end,
                                        );
                                        RangeInEditor::Text(start..end)
                                    })
                                }),
                                definition_result
                                    .into_iter()
                                    .map(GoToDefinitionLink::Text)
                                    .collect(),
                            )
                        })
                }
                TriggerPoint::InlayHint(highlight, lsp_location, server_id) => Some((
                    Some(RangeInEditor::Inlay(highlight.clone())),
                    vec![GoToDefinitionLink::InlayHint(
                        lsp_location.clone(),
                        *server_id,
                    )],
                )),
            };

            this.update(&mut cx, |this, cx| {
                // Clear any existing highlights
                this.clear_highlights::<LinkGoToDefinitionState>(cx);
                this.link_go_to_definition_state.kind = Some(definition_kind);
                this.link_go_to_definition_state.symbol_range = result
                    .as_ref()
                    .and_then(|(symbol_range, _)| symbol_range.clone());

                if let Some((symbol_range, definitions)) = result {
                    this.link_go_to_definition_state.definitions = definitions.clone();

                    let buffer_snapshot = buffer.read(cx).snapshot();

                    // Only show highlight if there exists a definition to jump to that doesn't contain
                    // the current location.
                    let any_definition_does_not_contain_current_location =
                        definitions.iter().any(|definition| {
                            match &definition {
                                GoToDefinitionLink::Text(link) => {
                                    if link.target.buffer == buffer {
                                        let range = &link.target.range;
                                        // Expand range by one character as lsp definition ranges include positions adjacent
                                        // but not contained by the symbol range
                                        let start = buffer_snapshot.clip_offset(
                                            range
                                                .start
                                                .to_offset(&buffer_snapshot)
                                                .saturating_sub(1),
                                            Bias::Left,
                                        );
                                        let end = buffer_snapshot.clip_offset(
                                            range.end.to_offset(&buffer_snapshot) + 1,
                                            Bias::Right,
                                        );
                                        let offset = buffer_position.to_offset(&buffer_snapshot);
                                        !(start <= offset && end >= offset)
                                    } else {
                                        true
                                    }
                                }
                                GoToDefinitionLink::InlayHint(_, _) => true,
                            }
                        });

                    if any_definition_does_not_contain_current_location {
                        // todo!()
                        // // Highlight symbol using theme link definition highlight style
                        // let style = theme::current(cx).editor.link_definition;
                        // let highlight_range =
                        //     symbol_range.unwrap_or_else(|| match &trigger_point {
                        //         TriggerPoint::Text(trigger_anchor) => {
                        //             let snapshot = &snapshot.buffer_snapshot;
                        //             // If no symbol range returned from language server, use the surrounding word.
                        //             let (offset_range, _) =
                        //                 snapshot.surrounding_word(*trigger_anchor);
                        //             RangeInEditor::Text(
                        //                 snapshot.anchor_before(offset_range.start)
                        //                     ..snapshot.anchor_after(offset_range.end),
                        //             )
                        //         }
                        //         TriggerPoint::InlayHint(highlight, _, _) => {
                        //             RangeInEditor::Inlay(highlight.clone())
                        //         }
                        //     });

                        // match highlight_range {
                        //     RangeInEditor::Text(text_range) => this
                        //         .highlight_text::<LinkGoToDefinitionState>(
                        //             vec![text_range],
                        //             style,
                        //             cx,
                        //         ),
                        //     RangeInEditor::Inlay(highlight) => this
                        //         .highlight_inlays::<LinkGoToDefinitionState>(
                        //             vec![highlight],
                        //             style,
                        //             cx,
                        //         ),
                        // }
                    } else {
                        hide_link_definition(this, cx);
                    }
                }
            })?;

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

    editor.link_go_to_definition_state.task = Some(task);
}

pub fn hide_link_definition(editor: &mut Editor, cx: &mut ViewContext<Editor>) {
    if editor.link_go_to_definition_state.symbol_range.is_some()
        || !editor.link_go_to_definition_state.definitions.is_empty()
    {
        editor.link_go_to_definition_state.symbol_range.take();
        editor.link_go_to_definition_state.definitions.clear();
        cx.notify();
    }

    editor.link_go_to_definition_state.task = None;

    editor.clear_highlights::<LinkGoToDefinitionState>(cx);
}

pub fn go_to_fetched_definition(
    editor: &mut Editor,
    point: PointForPosition,
    split: bool,
    cx: &mut ViewContext<Editor>,
) {
    go_to_fetched_definition_of_kind(LinkDefinitionKind::Symbol, editor, point, split, cx);
}

pub fn go_to_fetched_type_definition(
    editor: &mut Editor,
    point: PointForPosition,
    split: bool,
    cx: &mut ViewContext<Editor>,
) {
    go_to_fetched_definition_of_kind(LinkDefinitionKind::Type, editor, point, split, cx);
}

fn go_to_fetched_definition_of_kind(
    kind: LinkDefinitionKind,
    editor: &mut Editor,
    point: PointForPosition,
    split: bool,
    cx: &mut ViewContext<Editor>,
) {
    let cached_definitions = editor.link_go_to_definition_state.definitions.clone();
    hide_link_definition(editor, cx);
    let cached_definitions_kind = editor.link_go_to_definition_state.kind;

    let is_correct_kind = cached_definitions_kind == Some(kind);
    if !cached_definitions.is_empty() && is_correct_kind {
        if !editor.focus_handle.is_focused(cx) {
            cx.focus(&editor.focus_handle);
        }

        editor.navigate_to_definitions(cached_definitions, split, cx);
    } else {
        editor.select(
            SelectPhase::Begin {
                position: point.next_valid,
                add: false,
                click_count: 1,
            },
            cx,
        );

        if point.as_valid().is_some() {
            match kind {
                LinkDefinitionKind::Symbol => editor.go_to_definition(&GoToDefinition, cx),
                LinkDefinitionKind::Type => editor.go_to_type_definition(&GoToTypeDefinition, cx),
            }
        }
    }
}

// #[cfg(test)]
// mod tests {
//     use super::*;
//     use crate::{
//         display_map::ToDisplayPoint,
//         editor_tests::init_test,
//         inlay_hint_cache::tests::{cached_hint_labels, visible_hint_labels},
//         test::editor_lsp_test_context::EditorLspTestContext,
//     };
//     use futures::StreamExt;
//     use gpui::{
//         platform::{self, Modifiers, ModifiersChangedEvent},
//         View,
//     };
//     use indoc::indoc;
//     use language::language_settings::InlayHintSettings;
//     use lsp::request::{GotoDefinition, GotoTypeDefinition};
//     use util::assert_set_eq;

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

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

//         cx.set_state(indoc! {"
//             struct A;
//             let vˇariable = A;
//         "});

//         // Basic hold cmd+shift, expect highlight in region if response contains type definition
//         let hover_point = cx.display_point(indoc! {"
//             struct A;
//             let vˇariable = A;
//         "});
//         let symbol_range = cx.lsp_range(indoc! {"
//             struct A;
//             let «variable» = A;
//         "});
//         let target_range = cx.lsp_range(indoc! {"
//             struct «A»;
//             let variable = A;
//         "});

//         let mut requests =
//             cx.handle_request::<GotoTypeDefinition, _, _>(move |url, _, _| async move {
//                 Ok(Some(lsp::GotoTypeDefinitionResponse::Link(vec![
//                     lsp::LocationLink {
//                         origin_selection_range: Some(symbol_range),
//                         target_uri: url.clone(),
//                         target_range,
//                         target_selection_range: target_range,
//                     },
//                 ])))
//             });

//         // Press cmd+shift to trigger highlight
//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 true,
//                 true,
//                 cx,
//             );
//         });
//         requests.next().await;
//         cx.foreground().run_until_parked();
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             struct A;
//             let «variable» = A;
//         "});

//         // Unpress shift causes highlight to go away (normal goto-definition is not valid here)
//         cx.update_editor(|editor, cx| {
//             editor.modifiers_changed(
//                 &platform::ModifiersChangedEvent {
//                     modifiers: Modifiers {
//                         cmd: true,
//                         ..Default::default()
//                     },
//                     ..Default::default()
//                 },
//                 cx,
//             );
//         });
//         // Assert no link highlights
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             struct A;
//             let variable = A;
//         "});

//         // Cmd+shift click without existing definition requests and jumps
//         let hover_point = cx.display_point(indoc! {"
//             struct A;
//             let vˇariable = A;
//         "});
//         let target_range = cx.lsp_range(indoc! {"
//             struct «A»;
//             let variable = A;
//         "});

//         let mut requests =
//             cx.handle_request::<GotoTypeDefinition, _, _>(move |url, _, _| async move {
//                 Ok(Some(lsp::GotoTypeDefinitionResponse::Link(vec![
//                     lsp::LocationLink {
//                         origin_selection_range: None,
//                         target_uri: url,
//                         target_range,
//                         target_selection_range: target_range,
//                     },
//                 ])))
//             });

//         cx.update_editor(|editor, cx| {
//             go_to_fetched_type_definition(editor, PointForPosition::valid(hover_point), false, cx);
//         });
//         requests.next().await;
//         cx.foreground().run_until_parked();

//         cx.assert_editor_state(indoc! {"
//             struct «Aˇ»;
//             let variable = A;
//         "});
//     }

//     #[gpui::test]
//     async fn test_link_go_to_definition(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;

//         cx.set_state(indoc! {"
//             fn ˇtest() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         // Basic hold cmd, expect highlight in region if response contains definition
//         let hover_point = cx.display_point(indoc! {"
//             fn test() { do_wˇork(); }
//             fn do_work() { test(); }
//         "});
//         let symbol_range = cx.lsp_range(indoc! {"
//             fn test() { «do_work»(); }
//             fn do_work() { test(); }
//         "});
//         let target_range = cx.lsp_range(indoc! {"
//             fn test() { do_work(); }
//             fn «do_work»() { test(); }
//         "});

//         let mut requests = cx.handle_request::<GotoDefinition, _, _>(move |url, _, _| async move {
//             Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
//                 lsp::LocationLink {
//                     origin_selection_range: Some(symbol_range),
//                     target_uri: url.clone(),
//                     target_range,
//                     target_selection_range: target_range,
//                 },
//             ])))
//         });

//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         requests.next().await;
//         cx.foreground().run_until_parked();
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { «do_work»(); }
//             fn do_work() { test(); }
//         "});

//         // Unpress cmd causes highlight to go away
//         cx.update_editor(|editor, cx| {
//             editor.modifiers_changed(&Default::default(), cx);
//         });

//         // Assert no link highlights
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         // Response without source range still highlights word
//         cx.update_editor(|editor, _| editor.link_go_to_definition_state.last_trigger_point = None);
//         let mut requests = cx.handle_request::<GotoDefinition, _, _>(move |url, _, _| async move {
//             Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
//                 lsp::LocationLink {
//                     // No origin range
//                     origin_selection_range: None,
//                     target_uri: url.clone(),
//                     target_range,
//                     target_selection_range: target_range,
//                 },
//             ])))
//         });
//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         requests.next().await;
//         cx.foreground().run_until_parked();

//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { «do_work»(); }
//             fn do_work() { test(); }
//         "});

//         // Moving mouse to location with no response dismisses highlight
//         let hover_point = cx.display_point(indoc! {"
//             fˇn test() { do_work(); }
//             fn do_work() { test(); }
//         "});
//         let mut requests = cx
//             .lsp
//             .handle_request::<GotoDefinition, _, _>(move |_, _| async move {
//                 // No definitions returned
//                 Ok(Some(lsp::GotoDefinitionResponse::Link(vec![])))
//             });
//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         requests.next().await;
//         cx.foreground().run_until_parked();

//         // Assert no link highlights
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         // Move mouse without cmd and then pressing cmd triggers highlight
//         let hover_point = cx.display_point(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { teˇst(); }
//         "});
//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 false,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground().run_until_parked();

//         // Assert no link highlights
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         let symbol_range = cx.lsp_range(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { «test»(); }
//         "});
//         let target_range = cx.lsp_range(indoc! {"
//             fn «test»() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         let mut requests = cx.handle_request::<GotoDefinition, _, _>(move |url, _, _| async move {
//             Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
//                 lsp::LocationLink {
//                     origin_selection_range: Some(symbol_range),
//                     target_uri: url,
//                     target_range,
//                     target_selection_range: target_range,
//                 },
//             ])))
//         });
//         cx.update_editor(|editor, cx| {
//             editor.modifiers_changed(
//                 &ModifiersChangedEvent {
//                     modifiers: Modifiers {
//                         cmd: true,
//                         ..Default::default()
//                     },
//                 },
//                 cx,
//             );
//         });
//         requests.next().await;
//         cx.foreground().run_until_parked();

//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { «test»(); }
//         "});

//         // Deactivating the window dismisses the highlight
//         cx.update_workspace(|workspace, cx| {
//             workspace.on_window_activation_changed(false, cx);
//         });
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         // Moving the mouse restores the highlights.
//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground().run_until_parked();
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { «test»(); }
//         "});

//         // Moving again within the same symbol range doesn't re-request
//         let hover_point = cx.display_point(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { tesˇt(); }
//         "});
//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground().run_until_parked();
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { «test»(); }
//         "});

//         // Cmd click with existing definition doesn't re-request and dismisses highlight
//         cx.update_editor(|editor, cx| {
//             go_to_fetched_definition(editor, PointForPosition::valid(hover_point), false, cx);
//         });
//         // Assert selection moved to to definition
//         cx.lsp
//             .handle_request::<GotoDefinition, _, _>(move |_, _| async move {
//                 // Empty definition response to make sure we aren't hitting the lsp and using
//                 // the cached location instead
//                 Ok(Some(lsp::GotoDefinitionResponse::Link(vec![])))
//             });
//         cx.foreground().run_until_parked();
//         cx.assert_editor_state(indoc! {"
//             fn «testˇ»() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         // Assert no link highlights after jump
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { test(); }
//         "});

//         // Cmd click without existing definition requests and jumps
//         let hover_point = cx.display_point(indoc! {"
//             fn test() { do_wˇork(); }
//             fn do_work() { test(); }
//         "});
//         let target_range = cx.lsp_range(indoc! {"
//             fn test() { do_work(); }
//             fn «do_work»() { test(); }
//         "});

//         let mut requests = cx.handle_request::<GotoDefinition, _, _>(move |url, _, _| async move {
//             Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
//                 lsp::LocationLink {
//                     origin_selection_range: None,
//                     target_uri: url,
//                     target_range,
//                     target_selection_range: target_range,
//                 },
//             ])))
//         });
//         cx.update_editor(|editor, cx| {
//             go_to_fetched_definition(editor, PointForPosition::valid(hover_point), false, cx);
//         });
//         requests.next().await;
//         cx.foreground().run_until_parked();
//         cx.assert_editor_state(indoc! {"
//             fn test() { do_work(); }
//             fn «do_workˇ»() { test(); }
//         "});

//         // 1. We have a pending selection, mouse point is over a symbol that we have a response for, hitting cmd and nothing happens
//         // 2. Selection is completed, hovering
//         let hover_point = cx.display_point(indoc! {"
//             fn test() { do_wˇork(); }
//             fn do_work() { test(); }
//         "});
//         let target_range = cx.lsp_range(indoc! {"
//             fn test() { do_work(); }
//             fn «do_work»() { test(); }
//         "});
//         let mut requests = cx.handle_request::<GotoDefinition, _, _>(move |url, _, _| async move {
//             Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
//                 lsp::LocationLink {
//                     origin_selection_range: None,
//                     target_uri: url,
//                     target_range,
//                     target_selection_range: target_range,
//                 },
//             ])))
//         });

//         // create a pending selection
//         let selection_range = cx.ranges(indoc! {"
//             fn «test() { do_w»ork(); }
//             fn do_work() { test(); }
//         "})[0]
//             .clone();
//         cx.update_editor(|editor, cx| {
//             let snapshot = editor.buffer().read(cx).snapshot(cx);
//             let anchor_range = snapshot.anchor_before(selection_range.start)
//                 ..snapshot.anchor_after(selection_range.end);
//             editor.change_selections(Some(crate::Autoscroll::fit()), cx, |s| {
//                 s.set_pending_anchor_range(anchor_range, crate::SelectMode::Character)
//             });
//         });
//         cx.update_editor(|editor, cx| {
//             update_go_to_definition_link(
//                 editor,
//                 Some(GoToDefinitionTrigger::Text(hover_point)),
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground().run_until_parked();
//         assert!(requests.try_next().is_err());
//         cx.assert_editor_text_highlights::<LinkGoToDefinitionState>(indoc! {"
//             fn test() { do_work(); }
//             fn do_work() { test(); }
//         "});
//         cx.foreground().run_until_parked();
//     }

//     #[gpui::test]
//     async fn test_link_go_to_inlay(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::Left(true)),
//                 ..Default::default()
//             },
//             cx,
//         )
//         .await;
//         cx.set_state(indoc! {"
//             struct TestStruct;

//             fn main() {
//                 let variableˇ = TestStruct;
//             }
//         "});
//         let hint_start_offset = cx.ranges(indoc! {"
//             struct TestStruct;

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

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

//         let expected_uri = cx.buffer_lsp_url.clone();
//         let hint_label = ": TestStruct";
//         cx.lsp
//             .handle_request::<lsp::request::InlayHintRequest, _, _>(move |params, _| {
//                 let expected_uri = expected_uri.clone();
//                 async move {
//                     assert_eq!(params.text_document.uri, expected_uri);
//                     Ok(Some(vec![lsp::InlayHint {
//                         position: hint_position,
//                         label: lsp::InlayHintLabel::LabelParts(vec![lsp::InlayHintLabelPart {
//                             value: hint_label.to_string(),
//                             location: Some(lsp::Location {
//                                 uri: params.text_document.uri,
//                                 range: target_range,
//                             }),
//                             ..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![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;

//             fn main() {
//                 let variable« »= TestStruct;
//             }
//         "})
//             .get(0)
//             .cloned()
//             .unwrap();
//         let hint_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() + (hint_label.len() / 2) as u32,
//             );
//             PointForPosition {
//                 previous_valid,
//                 next_valid,
//                 exact_unclipped,
//                 column_overshoot_after_line_end: 0,
//             }
//         });
//         // Press cmd to trigger highlight
//         cx.update_editor(|editor, cx| {
//             update_inlay_link_and_hover_points(
//                 &editor.snapshot(cx),
//                 hint_hover_position,
//                 editor,
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground().run_until_parked();
//         cx.update_editor(|editor, cx| {
//             let snapshot = editor.snapshot(cx);
//             let actual_highlights = snapshot
//                 .inlay_highlights::<LinkGoToDefinitionState>()
//                 .into_iter()
//                 .flat_map(|highlights| highlights.values().map(|(_, highlight)| highlight))
//                 .collect::<Vec<_>>();

//             let buffer_snapshot = editor.buffer().update(cx, |buffer, cx| buffer.snapshot(cx));
//             let expected_highlight = InlayHighlight {
//                 inlay: InlayId::Hint(0),
//                 inlay_position: buffer_snapshot.anchor_at(inlay_range.start, Bias::Right),
//                 range: 0..hint_label.len(),
//             };
//             assert_set_eq!(actual_highlights, vec![&expected_highlight]);
//         });

//         // Unpress cmd causes highlight to go away
//         cx.update_editor(|editor, cx| {
//             editor.modifiers_changed(
//                 &platform::ModifiersChangedEvent {
//                     modifiers: Modifiers {
//                         cmd: false,
//                         ..Default::default()
//                     },
//                     ..Default::default()
//                 },
//                 cx,
//             );
//         });
//         // Assert no link highlights
//         cx.update_editor(|editor, cx| {
//             let snapshot = editor.snapshot(cx);
//             let actual_ranges = snapshot
//                 .text_highlight_ranges::<LinkGoToDefinitionState>()
//                 .map(|ranges| ranges.as_ref().clone().1)
//                 .unwrap_or_default();

//             assert!(actual_ranges.is_empty(), "When no cmd is pressed, should have no hint label selected, but got: {actual_ranges:?}");
//         });

//         // Cmd+click without existing definition requests and jumps
//         cx.update_editor(|editor, cx| {
//             editor.modifiers_changed(
//                 &platform::ModifiersChangedEvent {
//                     modifiers: Modifiers {
//                         cmd: true,
//                         ..Default::default()
//                     },
//                     ..Default::default()
//                 },
//                 cx,
//             );
//             update_inlay_link_and_hover_points(
//                 &editor.snapshot(cx),
//                 hint_hover_position,
//                 editor,
//                 true,
//                 false,
//                 cx,
//             );
//         });
//         cx.foreground().run_until_parked();
//         cx.update_editor(|editor, cx| {
//             go_to_fetched_type_definition(editor, hint_hover_position, false, cx);
//         });
//         cx.foreground().run_until_parked();
//         cx.assert_editor_state(indoc! {"
//             struct «TestStructˇ»;

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