//! Provides `language`-related settings.

use crate::{
    Buffer, BufferSnapshot, File, Language, LanguageName, LanguageServerName, ModelineSettings,
};
use collections::{FxHashMap, HashMap, HashSet};
use ec4rs::{
    Properties as EditorconfigProperties,
    property::{
        EndOfLine, FinalNewline, IndentSize, IndentStyle, MaxLineLen, TabWidth, TrimTrailingWs,
    },
};
use globset::{Glob, GlobMatcher, GlobSet, GlobSetBuilder};
use gpui::{App, Modifiers, SharedString};
use itertools::{Either, Itertools};
use settings::{DocumentFoldingRanges, DocumentSymbols, IntoGpui, SemanticTokens};

pub use settings::{
    AutoIndentMode, CompletionSettingsContent, EditPredictionDataCollectionChoice,
    EditPredictionPromptFormatContent, EditPredictionProvider, EditPredictionsMode, FormatOnSave,
    Formatter, FormatterList, InlayHintKind, LanguageSettingsContent, LineEndingSetting,
    LspInsertMode, RewrapBehavior, ShowWhitespaceSetting, SoftWrap, WordsCompletionMode,
};
use settings::{RegisterSetting, Settings, SettingsLocation, SettingsStore, merge_from::MergeFrom};
use shellexpand;
use std::{borrow::Cow, num::NonZeroU32, path::Path, sync::Arc};
use text::ToOffset;

/// Returns the settings for all languages from the provided file.
pub fn all_language_settings<'a>(
    file: Option<&'a Arc<dyn File>>,
    cx: &'a App,
) -> &'a AllLanguageSettings {
    let location = file.map(|f| SettingsLocation {
        worktree_id: f.worktree_id(cx),
        path: f.path().as_ref(),
    });
    AllLanguageSettings::get(location, cx)
}

/// The settings for all languages.
#[derive(Debug, Clone, RegisterSetting)]
pub struct AllLanguageSettings {
    /// The edit prediction settings.
    pub edit_predictions: EditPredictionSettings,
    pub defaults: LanguageSettings,
    languages: HashMap<LanguageName, LanguageSettings>,
    pub file_types: FxHashMap<Arc<str>, (GlobSet, Vec<String>)>,
}

#[derive(Debug, Clone, PartialEq)]
pub struct WhitespaceMap {
    pub space: SharedString,
    pub tab: SharedString,
}

/// The settings for a particular language.
#[derive(Debug, Clone, PartialEq)]
pub struct LanguageSettings {
    /// How many columns a tab should occupy.
    pub tab_size: NonZeroU32,
    /// Whether to indent lines using tab characters, as opposed to multiple
    /// spaces.
    pub hard_tabs: bool,
    /// How to soft-wrap long lines of text.
    pub soft_wrap: settings::SoftWrap,
    /// The column at which to soft-wrap lines, for buffers where soft-wrap
    /// is enabled.
    pub preferred_line_length: u32,
    /// Whether to show wrap guides (vertical rulers) in the editor.
    /// Setting this to true will show a guide at the 'preferred_line_length' value
    /// if softwrap is set to 'preferred_line_length', and will show any
    /// additional guides as specified by the 'wrap_guides' setting.
    pub show_wrap_guides: bool,
    /// Character counts at which to show wrap guides (vertical rulers) in the editor.
    pub wrap_guides: Vec<usize>,
    /// Indent guide related settings.
    pub indent_guides: IndentGuideSettings,
    /// Whether or not to perform a buffer format before saving.
    pub format_on_save: FormatOnSave,
    /// Whether or not to remove any trailing whitespace from lines of a buffer
    /// before saving it.
    pub remove_trailing_whitespace_on_save: bool,
    /// Whether or not to ensure there's a single newline at the end of a buffer
    /// when saving it.
    pub ensure_final_newline_on_save: bool,
    /// How line endings are initialized for new files and normalized during
    /// format and save.
    pub line_ending: LineEndingSetting,
    /// How to perform a buffer format.
    pub formatter: settings::FormatterList,
    /// Zed's Prettier integration settings.
    pub prettier: PrettierSettings,
    /// Whether to automatically close JSX tags.
    pub jsx_tag_auto_close: bool,
    /// Whether to use language servers to provide code intelligence.
    pub enable_language_server: bool,
    /// The list of language servers to use (or disable) for this language.
    ///
    /// This array should consist of language server IDs, as well as the following
    /// special tokens:
    /// - `"!<language_server_id>"` - A language server ID prefixed with a `!` will be disabled.
    /// - `"..."` - A placeholder to refer to the **rest** of the registered language servers for this language.
    pub language_servers: Vec<String>,
    /// Controls how semantic tokens from language servers are used for syntax highlighting.
    pub semantic_tokens: SemanticTokens,
    /// Controls whether folding ranges from language servers are used instead of
    /// tree-sitter and indent-based folding.
    pub document_folding_ranges: DocumentFoldingRanges,
    /// Controls the source of document symbols used for outlines and breadcrumbs.
    pub document_symbols: DocumentSymbols,
    /// Controls where the `editor::Rewrap` action is allowed for this language.
    ///
    /// Note: This setting has no effect in Vim mode, as rewrap is already
    /// allowed everywhere.
    pub allow_rewrap: RewrapBehavior,
    /// Controls whether edit predictions are shown immediately (true)
    /// or manually by triggering `editor::ShowEditPrediction` (false).
    pub show_edit_predictions: bool,
    /// Controls whether edit predictions are shown in the given language
    /// scopes.
    pub edit_predictions_disabled_in: Vec<String>,
    /// Whether to show tabs and spaces in the editor.
    pub show_whitespaces: settings::ShowWhitespaceSetting,
    /// Visible characters used to render whitespace when show_whitespaces is enabled.
    pub whitespace_map: WhitespaceMap,
    /// Whether to start a new line with a comment when a previous line is a comment as well.
    pub extend_comment_on_newline: bool,
    /// Whether to continue markdown lists when pressing enter.
    pub extend_list_on_newline: bool,
    /// Whether to indent list items when pressing tab after a list marker.
    pub indent_list_on_tab: bool,
    /// Inlay hint related settings.
    pub inlay_hints: InlayHintSettings,
    /// Whether to automatically close brackets.
    pub use_autoclose: bool,
    /// Whether to automatically surround text with brackets.
    pub use_auto_surround: bool,
    /// Whether to use additional LSP queries to format (and amend) the code after
    /// every "trigger" symbol input, defined by LSP server capabilities.
    pub use_on_type_format: bool,
    /// Controls automatic indentation behavior when typing.
    pub auto_indent: AutoIndentMode,
    /// Whether indentation of pasted content should be adjusted based on the context.
    pub auto_indent_on_paste: bool,
    /// Controls how the editor handles the autoclosed characters.
    pub always_treat_brackets_as_autoclosed: bool,
    /// Which code actions to run on save
    pub code_actions_on_format: HashMap<String, bool>,
    /// Whether to perform linked edits
    pub linked_edits: bool,
    /// Task configuration for this language.
    pub tasks: LanguageTaskSettings,
    /// Whether to pop the completions menu while typing in an editor without
    /// explicitly requesting it.
    pub show_completions_on_input: bool,
    /// Whether to display inline and alongside documentation for items in the
    /// completions menu.
    pub show_completion_documentation: bool,
    /// Completion settings for this language.
    pub completions: CompletionSettings,
    /// Preferred debuggers for this language.
    pub debuggers: Vec<String>,
    /// Whether to enable word diff highlighting in the editor.
    ///
    /// When enabled, changed words within modified lines are highlighted
    /// to show exactly what changed.
    ///
    /// Default: `true`
    pub word_diff_enabled: bool,
    /// Whether to use tree-sitter bracket queries to detect and colorize the brackets in the editor.
    pub colorize_brackets: bool,
}

#[derive(Debug, Clone, PartialEq)]
pub struct CompletionSettings {
    /// Controls how words are completed.
    /// For large documents, not all words may be fetched for completion.
    ///
    /// Default: `fallback`
    pub words: WordsCompletionMode,
    /// How many characters has to be in the completions query to automatically show the words-based completions.
    /// Before that value, it's still possible to trigger the words-based completion manually with the corresponding editor command.
    ///
    /// Default: 3
    pub words_min_length: usize,
    /// Whether to fetch LSP completions or not.
    ///
    /// Default: true
    pub lsp: bool,
    /// When fetching LSP completions, determines how long to wait for a response of a particular server.
    /// When set to 0, waits indefinitely.
    ///
    /// Default: 0
    pub lsp_fetch_timeout_ms: u64,
    /// Controls how LSP completions are inserted.
    ///
    /// Default: "replace_suffix"
    pub lsp_insert_mode: LspInsertMode,
}

/// The settings for indent guides.
#[derive(Debug, Clone, PartialEq)]
pub struct IndentGuideSettings {
    /// Whether to display indent guides in the editor.
    ///
    /// Default: true
    pub enabled: bool,
    /// The width of the indent guides in pixels, between 1 and 10.
    ///
    /// Default: 1
    pub line_width: u32,
    /// The width of the active indent guide in pixels, between 1 and 10.
    ///
    /// Default: 1
    pub active_line_width: u32,
    /// Determines how indent guides are colored.
    ///
    /// Default: Fixed
    pub coloring: settings::IndentGuideColoring,
    /// Determines how indent guide backgrounds are colored.
    ///
    /// Default: Disabled
    pub background_coloring: settings::IndentGuideBackgroundColoring,
}

impl IndentGuideSettings {
    /// Returns the clamped line width in pixels for an indent guide based on
    /// whether it is active, or `None` when line coloring is disabled.
    pub fn visible_line_width(&self, active: bool) -> Option<u32> {
        if self.coloring == settings::IndentGuideColoring::Disabled {
            return None;
        }
        let width = if active {
            self.active_line_width
        } else {
            self.line_width
        };
        Some(width.clamp(1, 10))
    }
}

#[derive(Debug, Clone, PartialEq)]
pub struct LanguageTaskSettings {
    /// Extra task variables to set for a particular language.
    pub variables: HashMap<String, String>,
    pub enabled: bool,
    /// Use LSP tasks over Zed language extension ones.
    /// If no LSP tasks are returned due to error/timeout or regular execution,
    /// Zed language extension tasks will be used instead.
    ///
    /// Other Zed tasks will still be shown:
    /// * Zed task from either of the task config file
    /// * Zed task from history (e.g. one-off task was spawned before)
    pub prefer_lsp: bool,
}

/// Allows to enable/disable formatting with Prettier
/// and configure default Prettier, used when no project-level Prettier installation is found.
/// Prettier formatting is disabled by default.
#[derive(Debug, Clone, PartialEq)]
pub struct PrettierSettings {
    /// Enables or disables formatting with Prettier for a given language.
    pub allowed: bool,

    /// Forces Prettier integration to use a specific parser name when formatting files with the language.
    pub parser: Option<String>,

    /// Forces Prettier integration to use specific plugins when formatting files with the language.
    /// The default Prettier will be installed with these plugins.
    pub plugins: HashSet<String>,

    /// Default Prettier options, in the format as in package.json section for Prettier.
    /// If project installs Prettier via its package.json, these options will be ignored.
    pub options: HashMap<String, serde_json::Value>,
}

impl LanguageSettings {
    /// A token representing the rest of the available language servers.
    const REST_OF_LANGUAGE_SERVERS: &'static str = "...";

    pub fn for_buffer<'a>(buffer: &'a Buffer, cx: &'a App) -> Cow<'a, LanguageSettings> {
        Self::resolve(Some(buffer), None, cx)
    }

    pub fn for_buffer_at<'a, D: ToOffset>(
        buffer: &'a Buffer,
        position: D,
        cx: &'a App,
    ) -> Cow<'a, LanguageSettings> {
        let language = buffer.language_at(position);
        Self::resolve(Some(buffer), language.map(|l| l.name()).as_ref(), cx)
    }

    pub fn for_buffer_snapshot<'a>(
        buffer: &'a BufferSnapshot,
        offset: Option<usize>,
        cx: &'a App,
    ) -> Cow<'a, LanguageSettings> {
        let location = buffer.file().map(|f| SettingsLocation {
            worktree_id: f.worktree_id(cx),
            path: f.path().as_ref(),
        });

        let language = if let Some(offset) = offset {
            buffer.language_at(offset)
        } else {
            buffer.language()
        };

        let mut settings = AllLanguageSettings::get(location, cx).language(
            location,
            language.map(|l| l.name()).as_ref(),
            cx,
        );

        if let Some(modeline) = buffer.modeline() {
            merge_with_modeline(settings.to_mut(), modeline);
        }

        settings
    }

    pub fn resolve<'a>(
        buffer: Option<&'a Buffer>,
        override_language: Option<&LanguageName>,
        cx: &'a App,
    ) -> Cow<'a, LanguageSettings> {
        let Some(buffer) = buffer else {
            return AllLanguageSettings::get(None, cx).language(None, override_language, cx);
        };
        let location = buffer.file().map(|f| SettingsLocation {
            worktree_id: f.worktree_id(cx),
            path: f.path().as_ref(),
        });
        let all = AllLanguageSettings::get(location, cx);
        let mut settings = if override_language.is_none() {
            all.language(location, buffer.language().map(|l| l.name()).as_ref(), cx)
        } else {
            all.language(location, override_language, cx)
        };

        if let Some(modeline) = buffer.modeline() {
            merge_with_modeline(settings.to_mut(), modeline);
        }

        settings
    }

    /// Returns the customized list of language servers from the list of
    /// available language servers.
    pub fn customized_language_servers(
        &self,
        available_language_servers: &[LanguageServerName],
    ) -> Vec<LanguageServerName> {
        Self::resolve_language_servers(&self.language_servers, available_language_servers)
    }

    pub(crate) fn resolve_language_servers(
        configured_language_servers: &[String],
        available_language_servers: &[LanguageServerName],
    ) -> Vec<LanguageServerName> {
        let (disabled_language_servers, enabled_language_servers): (
            Vec<LanguageServerName>,
            Vec<LanguageServerName>,
        ) = configured_language_servers.iter().partition_map(
            |language_server| match language_server.strip_prefix('!') {
                Some(disabled) => Either::Left(LanguageServerName(disabled.to_string().into())),
                None => Either::Right(LanguageServerName(language_server.clone().into())),
            },
        );

        let rest = available_language_servers
            .iter()
            .filter(|&available_language_server| {
                !disabled_language_servers.contains(available_language_server)
                    && !enabled_language_servers.contains(available_language_server)
            })
            .cloned()
            .collect::<Vec<_>>();

        enabled_language_servers
            .into_iter()
            .flat_map(|language_server| {
                if language_server.0.as_ref() == Self::REST_OF_LANGUAGE_SERVERS {
                    rest.clone()
                } else {
                    vec![language_server]
                }
            })
            .collect::<Vec<_>>()
    }
}

// The settings for inlay hints.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct InlayHintSettings {
    /// Global switch to toggle hints on and off.
    ///
    /// Default: false
    pub enabled: bool,
    /// Global switch to toggle inline values on and off when debugging.
    ///
    /// Default: true
    pub show_value_hints: bool,
    /// Whether type hints should be shown.
    ///
    /// Default: true
    pub show_type_hints: bool,
    /// Whether parameter hints should be shown.
    ///
    /// Default: true
    pub show_parameter_hints: bool,
    /// Whether other hints should be shown.
    ///
    /// Default: true
    pub show_other_hints: bool,
    /// Whether to show a background for inlay hints.
    ///
    /// If set to `true`, the background will use the `hint.background` color
    /// from the current theme.
    ///
    /// Default: false
    pub show_background: bool,
    /// Whether or not to debounce inlay hints updates after buffer edits.
    ///
    /// Set to 0 to disable debouncing.
    ///
    /// Default: 700
    pub edit_debounce_ms: u64,
    /// Whether or not to debounce inlay hints updates after buffer scrolls.
    ///
    /// Set to 0 to disable debouncing.
    ///
    /// Default: 50
    pub scroll_debounce_ms: u64,
    /// Toggles inlay hints (hides or shows) when the user presses the modifiers specified.
    /// If only a subset of the modifiers specified is pressed, hints are not toggled.
    /// If no modifiers are specified, this is equivalent to `None`.
    ///
    /// Default: None
    pub toggle_on_modifiers_press: Option<Modifiers>,
}

impl InlayHintSettings {
    /// Returns the kinds of inlay hints that are enabled based on the settings.
    pub fn enabled_inlay_hint_kinds(&self) -> HashSet<Option<InlayHintKind>> {
        let mut kinds = HashSet::default();
        if self.show_type_hints {
            kinds.insert(Some(InlayHintKind::Type));
        }
        if self.show_parameter_hints {
            kinds.insert(Some(InlayHintKind::Parameter));
        }
        if self.show_other_hints {
            kinds.insert(None);
        }
        kinds
    }
}

/// The settings for edit predictions, such as [GitHub Copilot](https://github.com/features/copilot).
#[derive(Clone, Debug, Default)]
pub struct EditPredictionSettings {
    /// The provider that supplies edit predictions.
    pub provider: settings::EditPredictionProvider,
    /// A list of globs representing files that edit predictions should be disabled for.
    /// This list adds to a pre-existing, sensible default set of globs.
    /// Any additional ones you add are combined with them.
    pub disabled_globs: Vec<DisabledGlob>,
    /// Configures how edit predictions are displayed in the buffer.
    pub mode: settings::EditPredictionsMode,
    /// Settings specific to GitHub Copilot.
    pub copilot: CopilotSettings,
    /// Settings specific to Codestral.
    pub codestral: CodestralSettings,
    /// Settings specific to Ollama.
    pub ollama: Option<OpenAiCompatibleEditPredictionSettings>,
    pub open_ai_compatible_api: Option<OpenAiCompatibleEditPredictionSettings>,
    pub examples_dir: Option<Arc<Path>>,
    /// Controls whether training data collection is enabled.
    ///
    /// `Default` means the value stored in the legacy KV store is used as a fallback,
    /// preserving existing users' choices without a migration.
    pub allow_data_collection: EditPredictionDataCollectionChoice,
}

impl EditPredictionSettings {
    /// Returns whether edit predictions are enabled for the given path.
    pub fn enabled_for_file(&self, file: &Arc<dyn File>, cx: &App) -> bool {
        !self.disabled_globs.iter().any(|glob| {
            if glob.is_absolute {
                file.as_local()
                    .is_some_and(|local| glob.matcher.is_match(local.abs_path(cx)))
            } else {
                glob.matcher.is_match(file.path().as_std_path())
            }
        })
    }
}

#[derive(Clone, Debug)]
pub struct DisabledGlob {
    matcher: GlobMatcher,
    is_absolute: bool,
}

#[derive(Clone, Debug, Default)]
pub struct CopilotSettings {
    /// HTTP/HTTPS proxy to use for Copilot.
    pub proxy: Option<String>,
    /// Disable certificate verification for proxy (not recommended).
    pub proxy_no_verify: Option<bool>,
    /// Enterprise URI for Copilot.
    pub enterprise_uri: Option<String>,
    /// Whether the Copilot Next Edit Suggestions feature is enabled.
    pub enable_next_edit_suggestions: Option<bool>,
}

#[derive(Clone, Debug, Default)]
pub struct CodestralSettings {
    /// Model to use for completions.
    pub model: Option<String>,
    /// Maximum tokens to generate.
    pub max_tokens: Option<u32>,
    /// Custom API URL to use for Codestral.
    pub api_url: Option<String>,
}

#[derive(Clone, Debug, Default)]
pub struct OpenAiCompatibleEditPredictionSettings {
    /// Model to use for completions.
    pub model: String,
    /// Maximum tokens to generate.
    pub max_output_tokens: u32,
    /// Custom API URL to use for Ollama.
    pub api_url: Arc<str>,
    /// The prompt format to use for completions. When `None`, the format
    /// will be derived from the model name at request time.
    pub prompt_format: EditPredictionPromptFormat,
}

#[derive(Copy, Clone, Debug, Default, Eq, PartialEq)]
pub enum EditPredictionPromptFormat {
    #[default]
    Infer,
    Zeta(ZetaVersion),
    CodeLlama,
    StarCoder,
    DeepseekCoder,
    Qwen,
    CodeGemma,
    Codestral,
    Glm,
}

#[derive(Copy, Clone, Debug, Default, Eq, PartialEq)]
pub enum ZetaVersion {
    Zeta1,
    Zeta2,
    #[default] // NOTE: make latest version default when adding
    Zeta2_1,
}

impl From<EditPredictionPromptFormatContent> for EditPredictionPromptFormat {
    fn from(value: EditPredictionPromptFormatContent) -> Self {
        match value {
            EditPredictionPromptFormatContent::Infer => Self::Infer,
            EditPredictionPromptFormatContent::Zeta => Self::Zeta(ZetaVersion::Zeta1),
            EditPredictionPromptFormatContent::Zeta2 => Self::Zeta(ZetaVersion::Zeta2),
            EditPredictionPromptFormatContent::Zeta2_1 => Self::Zeta(ZetaVersion::Zeta2_1),
            EditPredictionPromptFormatContent::CodeLlama => Self::CodeLlama,
            EditPredictionPromptFormatContent::StarCoder => Self::StarCoder,
            EditPredictionPromptFormatContent::DeepseekCoder => Self::DeepseekCoder,
            EditPredictionPromptFormatContent::Qwen => Self::Qwen,
            EditPredictionPromptFormatContent::CodeGemma => Self::CodeGemma,
            EditPredictionPromptFormatContent::Codestral => Self::Codestral,
            EditPredictionPromptFormatContent::Glm => Self::Glm,
        }
    }
}

impl AllLanguageSettings {
    /// Returns the [`LanguageSettings`] for the language with the specified name.
    pub fn language<'a>(
        &'a self,
        location: Option<SettingsLocation<'a>>,
        language_name: Option<&LanguageName>,
        cx: &'a App,
    ) -> Cow<'a, LanguageSettings> {
        let settings = language_name
            .and_then(|name| self.languages.get(name))
            .unwrap_or(&self.defaults);

        let editorconfig_properties = location.and_then(|location| {
            cx.global::<SettingsStore>()
                .editorconfig_store
                .read(cx)
                .properties(location.worktree_id, location.path)
        });
        if let Some(editorconfig_properties) = editorconfig_properties {
            let mut settings = settings.clone();
            merge_with_editorconfig(&mut settings, &editorconfig_properties);
            Cow::Owned(settings)
        } else {
            Cow::Borrowed(settings)
        }
    }

    /// Returns whether edit predictions are enabled for the given path.
    pub fn edit_predictions_enabled_for_file(&self, file: &Arc<dyn File>, cx: &App) -> bool {
        self.edit_predictions.enabled_for_file(file, cx)
    }

    /// Returns whether edit predictions are enabled for the given language and path.
    pub fn show_edit_predictions(&self, language: Option<&Arc<Language>>, cx: &App) -> bool {
        self.language(None, language.map(|l| l.name()).as_ref(), cx)
            .show_edit_predictions
    }

    /// Returns the edit predictions preview mode for the given language and path.
    pub fn edit_predictions_mode(&self) -> EditPredictionsMode {
        self.edit_predictions.mode
    }
}

fn merge_with_modeline(settings: &mut LanguageSettings, modeline: &ModelineSettings) {
    let show_whitespaces = modeline.show_trailing_whitespace.and_then(|v| {
        if v {
            Some(ShowWhitespaceSetting::Trailing)
        } else {
            None
        }
    });

    settings
        .tab_size
        .merge_from_option(modeline.tab_size.as_ref());
    settings
        .hard_tabs
        .merge_from_option(modeline.hard_tabs.as_ref());
    settings
        .preferred_line_length
        .merge_from_option(modeline.preferred_line_length.map(u32::from).as_ref());
    let auto_indent_mode = modeline.auto_indent.map(|enabled| {
        if enabled {
            AutoIndentMode::SyntaxAware
        } else {
            AutoIndentMode::None
        }
    });
    settings
        .auto_indent
        .merge_from_option(auto_indent_mode.as_ref());
    settings
        .show_whitespaces
        .merge_from_option(show_whitespaces.as_ref());
    settings
        .ensure_final_newline_on_save
        .merge_from_option(modeline.ensure_final_newline.as_ref());
}

fn merge_with_editorconfig(settings: &mut LanguageSettings, cfg: &EditorconfigProperties) {
    let preferred_line_length = cfg.get::<MaxLineLen>().ok().and_then(|v| match v {
        MaxLineLen::Value(u) => Some(u as u32),
        MaxLineLen::Off => None,
    });
    let tab_size = cfg.get::<IndentSize>().ok().and_then(|v| match v {
        IndentSize::Value(u) => NonZeroU32::new(u as u32),
        IndentSize::UseTabWidth => cfg.get::<TabWidth>().ok().and_then(|w| match w {
            TabWidth::Value(u) => NonZeroU32::new(u as u32),
        }),
    });
    let hard_tabs = cfg
        .get::<IndentStyle>()
        .map(|v| v.eq(&IndentStyle::Tabs))
        .ok();
    let ensure_final_newline_on_save = cfg
        .get::<FinalNewline>()
        .map(|v| match v {
            FinalNewline::Value(b) => b,
        })
        .ok();
    let remove_trailing_whitespace_on_save = cfg
        .get::<TrimTrailingWs>()
        .map(|v| match v {
            TrimTrailingWs::Value(b) => b,
        })
        .ok();
    let line_ending = cfg.get::<EndOfLine>().ok().and_then(|v| match v {
        EndOfLine::Lf => Some(LineEndingSetting::EnforceLf),
        EndOfLine::CrLf => Some(LineEndingSetting::EnforceCrlf),
        EndOfLine::Cr => None,
    });

    settings
        .preferred_line_length
        .merge_from_option(preferred_line_length.as_ref());
    settings.tab_size.merge_from_option(tab_size.as_ref());
    settings.hard_tabs.merge_from_option(hard_tabs.as_ref());
    settings
        .remove_trailing_whitespace_on_save
        .merge_from_option(remove_trailing_whitespace_on_save.as_ref());
    settings
        .ensure_final_newline_on_save
        .merge_from_option(ensure_final_newline_on_save.as_ref());
    settings.line_ending.merge_from_option(line_ending.as_ref());
}

impl settings::Settings for AllLanguageSettings {
    fn from_settings(content: &settings::SettingsContent) -> Self {
        let all_languages = &content.project.all_languages;

        fn load_from_content(settings: LanguageSettingsContent) -> LanguageSettings {
            let inlay_hints = settings.inlay_hints.unwrap();
            let completions = settings.completions.unwrap();
            let prettier = settings.prettier.unwrap();
            let indent_guides = settings.indent_guides.unwrap();
            let tasks = settings.tasks.unwrap();
            let whitespace_map = settings.whitespace_map.unwrap();

            LanguageSettings {
                tab_size: settings.tab_size.unwrap(),
                hard_tabs: settings.hard_tabs.unwrap(),
                soft_wrap: settings.soft_wrap.unwrap(),
                preferred_line_length: settings.preferred_line_length.unwrap(),
                show_wrap_guides: settings.show_wrap_guides.unwrap(),
                wrap_guides: settings.wrap_guides.unwrap(),
                indent_guides: IndentGuideSettings {
                    enabled: indent_guides.enabled.unwrap(),
                    line_width: indent_guides.line_width.unwrap(),
                    active_line_width: indent_guides.active_line_width.unwrap(),
                    coloring: indent_guides.coloring.unwrap(),
                    background_coloring: indent_guides.background_coloring.unwrap(),
                },
                format_on_save: settings.format_on_save.unwrap(),
                remove_trailing_whitespace_on_save: settings
                    .remove_trailing_whitespace_on_save
                    .unwrap(),
                ensure_final_newline_on_save: settings.ensure_final_newline_on_save.unwrap(),
                line_ending: settings.line_ending.unwrap(),
                formatter: settings.formatter.unwrap(),
                prettier: PrettierSettings {
                    allowed: prettier.allowed.unwrap(),
                    parser: prettier.parser.filter(|parser| !parser.is_empty()),
                    plugins: prettier.plugins.unwrap_or_default(),
                    options: prettier.options.unwrap_or_default(),
                },
                jsx_tag_auto_close: settings.jsx_tag_auto_close.unwrap().enabled.unwrap(),
                enable_language_server: settings.enable_language_server.unwrap(),
                language_servers: settings.language_servers.unwrap(),
                semantic_tokens: settings.semantic_tokens.unwrap(),
                document_folding_ranges: settings.document_folding_ranges.unwrap(),
                document_symbols: settings.document_symbols.unwrap(),
                allow_rewrap: settings.allow_rewrap.unwrap(),
                show_edit_predictions: settings.show_edit_predictions.unwrap(),
                edit_predictions_disabled_in: settings.edit_predictions_disabled_in.unwrap(),
                show_whitespaces: settings.show_whitespaces.unwrap(),
                whitespace_map: WhitespaceMap {
                    space: SharedString::new(whitespace_map.space.unwrap().to_string()),
                    tab: SharedString::new(whitespace_map.tab.unwrap().to_string()),
                },
                extend_comment_on_newline: settings.extend_comment_on_newline.unwrap(),
                extend_list_on_newline: settings.extend_list_on_newline.unwrap(),
                indent_list_on_tab: settings.indent_list_on_tab.unwrap(),
                inlay_hints: InlayHintSettings {
                    enabled: inlay_hints.enabled.unwrap(),
                    show_value_hints: inlay_hints.show_value_hints.unwrap(),
                    show_type_hints: inlay_hints.show_type_hints.unwrap(),
                    show_parameter_hints: inlay_hints.show_parameter_hints.unwrap(),
                    show_other_hints: inlay_hints.show_other_hints.unwrap(),
                    show_background: inlay_hints.show_background.unwrap(),
                    edit_debounce_ms: inlay_hints.edit_debounce_ms.unwrap(),
                    scroll_debounce_ms: inlay_hints.scroll_debounce_ms.unwrap(),
                    toggle_on_modifiers_press: inlay_hints
                        .toggle_on_modifiers_press
                        .map(|m| m.into_gpui()),
                },
                use_autoclose: settings.use_autoclose.unwrap(),
                use_auto_surround: settings.use_auto_surround.unwrap(),
                use_on_type_format: settings.use_on_type_format.unwrap(),
                auto_indent: settings.auto_indent.unwrap(),
                auto_indent_on_paste: settings.auto_indent_on_paste.unwrap(),
                always_treat_brackets_as_autoclosed: settings
                    .always_treat_brackets_as_autoclosed
                    .unwrap(),
                code_actions_on_format: settings.code_actions_on_format.unwrap(),
                linked_edits: settings.linked_edits.unwrap(),
                tasks: LanguageTaskSettings {
                    variables: tasks.variables.unwrap_or_default(),
                    enabled: tasks.enabled.unwrap(),
                    prefer_lsp: tasks.prefer_lsp.unwrap(),
                },
                show_completions_on_input: settings.show_completions_on_input.unwrap(),
                show_completion_documentation: settings.show_completion_documentation.unwrap(),
                colorize_brackets: settings.colorize_brackets.unwrap(),
                completions: CompletionSettings {
                    words: completions.words.unwrap(),
                    words_min_length: completions.words_min_length.unwrap() as usize,
                    lsp: completions.lsp.unwrap(),
                    lsp_fetch_timeout_ms: completions.lsp_fetch_timeout_ms.unwrap(),
                    lsp_insert_mode: completions.lsp_insert_mode.unwrap(),
                },
                debuggers: settings.debuggers.unwrap(),
                word_diff_enabled: settings.word_diff_enabled.unwrap(),
            }
        }

        let default_language_settings = load_from_content(all_languages.defaults.clone());

        let mut languages = HashMap::default();
        for (language_name, settings) in &all_languages.languages.0 {
            let mut language_settings = all_languages.defaults.clone();
            settings::merge_from::MergeFrom::merge_from(&mut language_settings, settings);
            languages.insert(
                LanguageName(language_name.clone().into()),
                load_from_content(language_settings),
            );
        }

        let edit_prediction_provider = all_languages
            .edit_predictions
            .as_ref()
            .and_then(|ep| ep.provider);

        let edit_predictions = all_languages.edit_predictions.clone().unwrap();
        let edit_predictions_mode = edit_predictions.mode.unwrap();

        let disabled_globs: HashSet<&String> = edit_predictions
            .disabled_globs
            .as_ref()
            .unwrap()
            .iter()
            .collect();

        let copilot = edit_predictions.copilot.unwrap();
        let copilot_settings = CopilotSettings {
            proxy: copilot.proxy,
            proxy_no_verify: copilot.proxy_no_verify,
            enterprise_uri: copilot.enterprise_uri,
            enable_next_edit_suggestions: copilot.enable_next_edit_suggestions,
        };

        let codestral = edit_predictions.codestral.unwrap();
        let codestral_settings = CodestralSettings {
            model: codestral.model,
            max_tokens: codestral.max_tokens,
            api_url: codestral.api_url,
        };

        let ollama = edit_predictions.ollama.unwrap();
        let ollama_settings = ollama
            .model
            .filter(|model| !model.0.is_empty())
            .map(|model| OpenAiCompatibleEditPredictionSettings {
                model: model.0,
                max_output_tokens: ollama.max_output_tokens.unwrap(),
                api_url: ollama.api_url.unwrap().into(),
                prompt_format: ollama.prompt_format.unwrap().into(),
            });
        let openai_compatible_settings = edit_predictions.open_ai_compatible_api.unwrap();
        let openai_compatible_settings = openai_compatible_settings
            .model
            .filter(|model| !model.is_empty())
            .zip(
                openai_compatible_settings
                    .api_url
                    .filter(|api_url| !api_url.is_empty()),
            )
            .map(|(model, api_url)| OpenAiCompatibleEditPredictionSettings {
                model,
                max_output_tokens: openai_compatible_settings.max_output_tokens.unwrap(),
                api_url: api_url.into(),
                prompt_format: openai_compatible_settings.prompt_format.unwrap().into(),
            });

        let mut file_types: FxHashMap<Arc<str>, (GlobSet, Vec<String>)> = FxHashMap::default();

        for (language, patterns) in all_languages.file_types.iter().flatten() {
            let mut builder = GlobSetBuilder::new();

            for pattern in &patterns.0 {
                builder.add(Glob::new(pattern).unwrap());
            }

            file_types.insert(
                language.clone(),
                (builder.build().unwrap(), patterns.0.clone()),
            );
        }

        Self {
            edit_predictions: EditPredictionSettings {
                provider: if let Some(provider) = edit_prediction_provider {
                    provider
                } else {
                    EditPredictionProvider::None
                },
                disabled_globs: disabled_globs
                    .iter()
                    .filter_map(|g| {
                        let expanded_g = shellexpand::tilde(g).into_owned();
                        Some(DisabledGlob {
                            matcher: globset::Glob::new(&expanded_g).ok()?.compile_matcher(),
                            is_absolute: Path::new(&expanded_g).is_absolute(),
                        })
                    })
                    .collect(),
                mode: edit_predictions_mode,
                copilot: copilot_settings,
                codestral: codestral_settings,
                ollama: ollama_settings,
                open_ai_compatible_api: openai_compatible_settings,
                examples_dir: edit_predictions.examples_dir,
                allow_data_collection: edit_predictions.allow_data_collection.unwrap_or_default(),
            },
            defaults: default_language_settings,
            languages,
            file_types,
        }
    }
}

#[derive(Default, Debug, Clone, PartialEq, Eq)]
pub struct JsxTagAutoCloseSettings {
    /// Enables or disables auto-closing of JSX tags.
    pub enabled: bool,
}

#[cfg(test)]
mod tests {
    use super::*;
    use gpui::TestAppContext;
    use util::rel_path::rel_path;

    #[gpui::test]
    fn test_edit_predictions_enabled_for_file(cx: &mut TestAppContext) {
        use crate::TestFile;
        use std::path::PathBuf;

        let cx = cx.app.borrow_mut();

        let build_settings = |globs: &[&str]| -> EditPredictionSettings {
            EditPredictionSettings {
                disabled_globs: globs
                    .iter()
                    .map(|glob_str| {
                        #[cfg(windows)]
                        let glob_str = {
                            let mut g = String::new();

                            if glob_str.starts_with('/') {
                                g.push_str("C:");
                            }

                            g.push_str(&glob_str.replace('/', "\\"));
                            g
                        };
                        #[cfg(windows)]
                        let glob_str = glob_str.as_str();
                        let expanded_glob_str = shellexpand::tilde(glob_str).into_owned();
                        DisabledGlob {
                            matcher: globset::Glob::new(&expanded_glob_str)
                                .unwrap()
                                .compile_matcher(),
                            is_absolute: Path::new(&expanded_glob_str).is_absolute(),
                        }
                    })
                    .collect(),
                ..Default::default()
            }
        };

        const WORKTREE_NAME: &str = "project";
        let make_test_file = |segments: &[&str]| -> Arc<dyn File> {
            let path = segments.join("/");
            let path = rel_path(&path);

            Arc::new(TestFile {
                path: path.into(),
                root_name: WORKTREE_NAME.to_string(),
                local_root: Some(PathBuf::from(if cfg!(windows) {
                    "C:\\absolute\\"
                } else {
                    "/absolute/"
                })),
            })
        };

        let test_file = make_test_file(&["src", "test", "file.rs"]);

        // Test relative globs
        let settings = build_settings(&["*.rs"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["*.txt"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test absolute globs
        let settings = build_settings(&["/absolute/**/*.rs"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["/other/**/*.rs"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test exact path match relative
        let settings = build_settings(&["src/test/file.rs"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["src/test/otherfile.rs"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test exact path match absolute
        let settings = build_settings(&[&format!("/absolute/{}/src/test/file.rs", WORKTREE_NAME)]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["/other/test/otherfile.rs"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test * glob
        let settings = build_settings(&["*"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["*.txt"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test **/* glob
        let settings = build_settings(&["**/*"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["other/**/*"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test directory/** glob
        let settings = build_settings(&["src/**"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));

        let test_file_root: Arc<dyn File> = Arc::new(TestFile {
            path: rel_path("file.rs").into(),
            root_name: WORKTREE_NAME.to_string(),
            local_root: Some(PathBuf::from("/absolute/")),
        });
        assert!(settings.enabled_for_file(&test_file_root, &cx));

        let settings = build_settings(&["other/**"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test **/directory/* glob
        let settings = build_settings(&["**/test/*"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["**/other/*"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test multiple globs
        let settings = build_settings(&["*.rs", "*.txt", "src/**"]);
        assert!(!settings.enabled_for_file(&test_file, &cx));
        let settings = build_settings(&["*.txt", "*.md", "other/**"]);
        assert!(settings.enabled_for_file(&test_file, &cx));

        // Test dot files
        let dot_file = make_test_file(&[".config", "settings.json"]);
        let settings = build_settings(&[".*/**"]);
        assert!(!settings.enabled_for_file(&dot_file, &cx));

        let dot_env_file = make_test_file(&[".env"]);
        let settings = build_settings(&[".env"]);
        assert!(!settings.enabled_for_file(&dot_env_file, &cx));

        // Test tilde expansion
        let home = shellexpand::tilde("~").into_owned();
        let home_file = Arc::new(TestFile {
            path: rel_path("test.rs").into(),
            root_name: "the-dir".to_string(),
            local_root: Some(PathBuf::from(home)),
        }) as Arc<dyn File>;
        let settings = build_settings(&["~/the-dir/test.rs"]);
        assert!(!settings.enabled_for_file(&home_file, &cx));
    }

    #[test]
    fn test_resolve_language_servers() {
        fn language_server_names(names: &[&str]) -> Vec<LanguageServerName> {
            names
                .iter()
                .copied()
                .map(|name| LanguageServerName(name.to_string().into()))
                .collect::<Vec<_>>()
        }

        let available_language_servers = language_server_names(&[
            "typescript-language-server",
            "biome",
            "deno",
            "eslint",
            "tailwind",
        ]);

        // A value of just `["..."]` is the same as taking all of the available language servers.
        assert_eq!(
            LanguageSettings::resolve_language_servers(
                &[LanguageSettings::REST_OF_LANGUAGE_SERVERS.into()],
                &available_language_servers,
            ),
            available_language_servers
        );

        // Referencing one of the available language servers will change its order.
        assert_eq!(
            LanguageSettings::resolve_language_servers(
                &[
                    "biome".into(),
                    LanguageSettings::REST_OF_LANGUAGE_SERVERS.into(),
                    "deno".into()
                ],
                &available_language_servers
            ),
            language_server_names(&[
                "biome",
                "typescript-language-server",
                "eslint",
                "tailwind",
                "deno",
            ])
        );

        // Negating an available language server removes it from the list.
        assert_eq!(
            LanguageSettings::resolve_language_servers(
                &[
                    "deno".into(),
                    "!typescript-language-server".into(),
                    "!biome".into(),
                    LanguageSettings::REST_OF_LANGUAGE_SERVERS.into()
                ],
                &available_language_servers
            ),
            language_server_names(&["deno", "eslint", "tailwind"])
        );

        // Adding a language server not in the list of available language servers adds it to the list.
        assert_eq!(
            LanguageSettings::resolve_language_servers(
                &[
                    "my-cool-language-server".into(),
                    LanguageSettings::REST_OF_LANGUAGE_SERVERS.into()
                ],
                &available_language_servers
            ),
            language_server_names(&[
                "my-cool-language-server",
                "typescript-language-server",
                "biome",
                "deno",
                "eslint",
                "tailwind",
            ])
        );
    }
}
