use editor::ShowScrollbar;
use gpui::Pixels;
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use settings::{Settings, SettingsSources};

#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema, Copy, PartialEq)]
#[serde(rename_all = "snake_case")]
pub enum OutlinePanelDockPosition {
    Left,
    Right,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum ShowIndentGuides {
    Always,
    Never,
}

#[derive(Deserialize, Debug, Clone, Copy, PartialEq)]
pub struct OutlinePanelSettings {
    pub button: bool,
    pub default_width: Pixels,
    pub dock: OutlinePanelDockPosition,
    pub file_icons: bool,
    pub folder_icons: bool,
    pub git_status: bool,
    pub indent_size: f32,
    pub indent_guides: IndentGuidesSettings,
    pub auto_reveal_entries: bool,
    pub auto_fold_dirs: bool,
    pub scrollbar: ScrollbarSettings,
    pub expand_outlines_with_depth: usize,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ScrollbarSettings {
    /// When to show the scrollbar in the project panel.
    ///
    /// Default: inherits editor scrollbar settings
    pub show: Option<ShowScrollbar>,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ScrollbarSettingsContent {
    /// When to show the scrollbar in the project panel.
    ///
    /// Default: inherits editor scrollbar settings
    pub show: Option<Option<ShowScrollbar>>,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct IndentGuidesSettings {
    pub show: ShowIndentGuides,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct IndentGuidesSettingsContent {
    /// When to show the scrollbar in the outline panel.
    pub show: Option<ShowIndentGuides>,
}

#[derive(Clone, Default, Serialize, Deserialize, JsonSchema, Debug)]
pub struct OutlinePanelSettingsContent {
    /// Whether to show the outline panel button in the status bar.
    ///
    /// Default: true
    pub button: Option<bool>,
    /// Customize default width (in pixels) taken by outline panel
    ///
    /// Default: 240
    pub default_width: Option<f32>,
    /// The position of outline panel
    ///
    /// Default: left
    pub dock: Option<OutlinePanelDockPosition>,
    /// Whether to show file icons in the outline panel.
    ///
    /// Default: true
    pub file_icons: Option<bool>,
    /// Whether to show folder icons or chevrons for directories in the outline panel.
    ///
    /// Default: true
    pub folder_icons: Option<bool>,
    /// Whether to show the git status in the outline panel.
    ///
    /// Default: true
    pub git_status: Option<bool>,
    /// Amount of indentation (in pixels) for nested items.
    ///
    /// Default: 20
    pub indent_size: Option<f32>,
    /// Whether to reveal it in the outline panel automatically,
    /// when a corresponding project entry becomes active.
    /// Gitignored entries are never auto revealed.
    ///
    /// Default: true
    pub auto_reveal_entries: Option<bool>,
    /// Whether to fold directories automatically
    /// when directory has only one directory inside.
    ///
    /// Default: true
    pub auto_fold_dirs: Option<bool>,
    /// Settings related to indent guides in the outline panel.
    pub indent_guides: Option<IndentGuidesSettingsContent>,
    /// Scrollbar-related settings
    pub scrollbar: Option<ScrollbarSettingsContent>,
    /// Default depth to expand outline items in the current file.
    /// The default depth to which outline entries are expanded on reveal.
    /// - Set to 0 to collapse all items that have children
    /// - Set to 1 or higher to collapse items at that depth or deeper
    ///
    /// Default: 100
    pub expand_outlines_with_depth: Option<usize>,
}

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

    type FileContent = OutlinePanelSettingsContent;

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

    fn import_from_vscode(vscode: &settings::VsCodeSettings, current: &mut Self::FileContent) {
        if let Some(b) = vscode.read_bool("outline.icons") {
            current.file_icons = Some(b);
            current.folder_icons = Some(b);
        }

        vscode.bool_setting("git.decorations.enabled", &mut current.git_status);
    }
}