use editor::EditorSettings;
use gpui::Pixels;
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use settings::{Settings, SettingsKey, SettingsSources, SettingsUi};
use ui::scrollbars::{ScrollbarVisibility, ShowScrollbar};
use workspace::dock::DockPosition;

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

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ScrollbarSettings {
    pub show: Option<ShowScrollbar>,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
// Style of the git status indicator in the panel.
//
// Default: icon
pub enum StatusStyleContent {
    Icon,
    LabelColor,
}

#[derive(Default, Copy, Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum StatusStyle {
    #[default]
    Icon,
    LabelColor,
}

#[derive(Clone, Default, Serialize, Deserialize, JsonSchema, Debug, SettingsUi, SettingsKey)]
#[settings_key(key = "git_panel")]
pub struct GitPanelSettingsContent {
    /// Whether to show the panel button in the status bar.
    ///
    /// Default: true
    pub button: Option<bool>,
    /// Where to dock the panel.
    ///
    /// Default: left
    pub dock: Option<DockPosition>,
    /// Default width of the panel in pixels.
    ///
    /// Default: 360
    pub default_width: Option<f32>,
    /// How entry statuses are displayed.
    ///
    /// Default: icon
    pub status_style: Option<StatusStyle>,
    /// How and when the scrollbar should be displayed.
    ///
    /// Default: inherits editor scrollbar settings
    pub scrollbar: Option<ScrollbarSettings>,

    /// What the default branch name should be when
    /// `init.defaultBranch` is not set in git
    ///
    /// Default: main
    pub fallback_branch_name: Option<String>,

    /// Whether to sort entries in the panel by path
    /// or by status (the default).
    ///
    /// Default: false
    pub sort_by_path: Option<bool>,

    /// Whether to collapse untracked files in the diff panel.
    ///
    /// Default: false
    pub collapse_untracked_diff: Option<bool>,
}

#[derive(Deserialize, Debug, Clone, PartialEq)]
pub struct GitPanelSettings {
    pub button: bool,
    pub dock: DockPosition,
    pub default_width: Pixels,
    pub status_style: StatusStyle,
    pub scrollbar: ScrollbarSettings,
    pub fallback_branch_name: String,
    pub sort_by_path: bool,
    pub collapse_untracked_diff: bool,
}

impl ScrollbarVisibility for GitPanelSettings {
    fn visibility(&self, cx: &ui::App) -> ShowScrollbar {
        // TODO: This PR should have defined Editor's `scrollbar.axis`
        // as an Option<ScrollbarAxis>, not a ScrollbarAxes as it would allow you to
        // `.unwrap_or(EditorSettings::get_global(cx).scrollbar.show)`.
        //
        // Once this is fixed we can extend the GitPanelSettings with a `scrollbar.axis`
        // so we can show each axis based on the settings.
        //
        // We should fix this. PR: https://github.com/zed-industries/zed/pull/19495
        self.scrollbar
            .show
            .unwrap_or_else(|| EditorSettings::get_global(cx).scrollbar.show)
    }
}

impl Settings for GitPanelSettings {
    type FileContent = GitPanelSettingsContent;

    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) {
        vscode.bool_setting("git.enabled", &mut current.button);
        vscode.string_setting("git.defaultBranchName", &mut current.fallback_branch_name);
    }
}