mod archive_labels;
mod bookmark_files;
mod bookmarks;
pub(crate) mod chrome;
mod command_actions;
mod download_targets;
mod downloads;
mod focus;
mod history;
mod internal_pages;
mod local_data_files;
mod navigation;
mod notes;
mod plugins;
mod reading_list;
mod render;
mod settings_actions;
mod shortcut_files;
mod sidebar;
mod site_permissions;
mod space_files;
mod spaces;
mod splits;
mod tab_groups;
mod tab_lifecycle;
mod web_surface;
mod web_surface_controller;
mod web_surface_frame;
mod web_surface_geometry;
mod web_surface_keyboard;
mod web_surface_permissions;
mod web_surface_runtime;
mod web_surface_state;
mod web_surface_view;

use std::time::Duration;

use ely_browser_core::{BrowserCore, InitialBrowserConfig};
use ely_domain::{DEFAULT_TRANSLUCENCY_PCT, ProfileId, SpaceId, TabId};
use gpui::{AppContext, Context, Entity, FocusHandle, Subscription, Timer, Window};
use gpui_component::input::{InputEvent, InputState};
use gpui_component::slider::{SliderEvent, SliderState, SliderValue};

use crate::shortcuts::ShortcutProfile;
use bookmarks::PendingBookmarkEdit;
use downloads::PendingDownloadFileAction;
use history::{PendingHistoryDomainClear, PendingHistoryTimeClear};
use plugins::{PendingPluginInstall, PendingPluginUninstall};
use web_surface::WebSurfaceStore;

use crate::{
    CloseCurrentTab, DownloadCurrentPage, FocusAddressBar, FocusCommandMode, OpenDownloads,
    OpenHistory, OpenNewTab, OpenSettings, OpenTaskManager, ResetZoom, RestoreClosedTab,
    SelectNextTab, SelectPreviousTab, ToggleFavoriteTab, TogglePinnedTab, ZoomIn, ZoomOut,
};

enum ShellState {
    Ready(Box<BrowserCore>),
    StartupError(String),
}

pub struct ElyShell {
    state: ShellState,
    focus_handle: FocusHandle,
    command_input: Entity<InputState>,
    pub(crate) plugin_search_input: Entity<InputState>,
    pub(crate) translucency_slider: Entity<SliderState>,
    pub(crate) workspace_picker_open: bool,
    pub(crate) sidebar_hover_expanded: bool,
    pub(crate) command_selected_index: usize,
    /// Live state for sidebar-resize drag. While the user holds the
    /// resize handle: `(mouse_x_at_drag_start, sidebar_width_px_at_drag_start)`.
    /// `None` whenever no drag is in flight.
    pub(crate) sidebar_resize_origin: Option<(f32, u16)>,
    download_action_error: Option<String>,
    download_clear_confirmation: bool,
    download_security_confirmation: Option<PendingDownloadFileAction>,
    history_clear_confirmation: Option<ProfileId>,
    pending_history_domain_clear: Option<PendingHistoryDomainClear>,
    pending_history_time_clear: Option<PendingHistoryTimeClear>,
    site_permissions_clear_confirmation: Option<ProfileId>,
    pending_space_trash: Option<SpaceId>,
    space_file_error: Option<String>,
    space_file_notice: Option<String>,
    shortcut_file_error: Option<String>,
    shortcut_file_notice: Option<String>,
    shortcut_profile: ShortcutProfile,
    pending_bookmark_edit: Option<PendingBookmarkEdit>,
    bookmark_edit_error: Option<String>,
    bookmark_file_error: Option<String>,
    bookmark_file_notice: Option<String>,
    local_data_file_error: Option<String>,
    local_data_file_notice: Option<String>,
    plugin_install_error: Option<String>,
    pending_plugin_install: Option<PendingPluginInstall>,
    pending_plugin_uninstall: Option<PendingPluginUninstall>,
    web_surfaces: WebSurfaceStore,
    _command_subscription: Subscription,
    _translucency_subscription: Subscription,
}

impl ElyShell {
    pub fn new(window: &mut Window, cx: &mut Context<Self>) -> Self {
        Self::new_with_config(InitialBrowserConfig::ely_defaults(), window, cx)
    }

    pub fn new_private(window: &mut Window, cx: &mut Context<Self>) -> Self {
        Self::new_with_config(InitialBrowserConfig::private_window(), window, cx)
    }

    fn new_with_config(
        config: Result<InitialBrowserConfig, ely_domain::DomainError>,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> Self {
        let command_input = cx.new(|cx| {
            InputState::new(window, cx).placeholder("Search ELY or type a command…")
        });
        let plugin_search_input =
            cx.new(|cx| InputState::new(window, cx).placeholder("Search plugins…"));
        let translucency_slider = cx.new(|_cx| {
            SliderState::new()
                .min(0.0)
                .max(100.0)
                .step(1.0)
                .default_value(f32::from(DEFAULT_TRANSLUCENCY_PCT))
        });

        let translucency_subscription =
            cx.subscribe(&translucency_slider, |shell: &mut Self, _state, event: &SliderEvent, cx| {
                let SliderEvent::Change(SliderValue::Single(value)) = event else {
                    return;
                };
                let pct = value.clamp(0.0, 100.0).round() as u8;
                shell.set_translucency_pct(pct, cx);
            });

        let command_subscription = cx.subscribe_in(
            &command_input,
            window,
            |shell: &mut Self, input, event: &InputEvent, window, cx| {
                let mut submitted_intent = None;
                let mut sync_address = false;
                let submitted = matches!(event, InputEvent::PressEnter { .. });

                {
                    let ShellState::Ready(core) = &mut shell.state else {
                        return;
                    };

                    let value = input.read(cx).value().to_string();
                    core.set_command_query(value);

                    if submitted {
                        submitted_intent = core.submit_command().ok().flatten();
                        sync_address = core.command_query().is_empty();
                    }
                }

                shell.handle_shell_command_intent(submitted_intent.as_ref(), window, cx);

                if sync_address {
                    shell.sync_address_input(window, cx);
                }

                cx.notify();
            },
        );

        let state = match config.and_then(|config| {
            BrowserCore::new(config).map_err(|error| match error {
                ely_browser_core::CoreError::Domain(source) => source,
                _ => ely_domain::DomainError::InvalidCommand,
            })
        }) {
            Ok(core) => ShellState::Ready(Box::new(core)),
            Err(error) => ShellState::StartupError(error.to_string()),
        };

        let shell = Self {
            state,
            focus_handle: cx.focus_handle(),
            command_input,
            plugin_search_input,
            translucency_slider,
            workspace_picker_open: false,
            sidebar_hover_expanded: false,
            command_selected_index: 0,
            sidebar_resize_origin: None,
            download_action_error: None,
            download_clear_confirmation: false,
            download_security_confirmation: None,
            history_clear_confirmation: None,
            pending_history_domain_clear: None,
            pending_history_time_clear: None,
            site_permissions_clear_confirmation: None,
            pending_space_trash: None,
            space_file_error: None,
            space_file_notice: None,
            shortcut_file_error: None,
            shortcut_file_notice: None,
            shortcut_profile: ShortcutProfile::default_profile(),
            pending_bookmark_edit: None,
            bookmark_edit_error: None,
            bookmark_file_error: None,
            bookmark_file_notice: None,
            local_data_file_error: None,
            local_data_file_notice: None,
            plugin_install_error: None,
            pending_plugin_install: None,
            pending_plugin_uninstall: None,
            web_surfaces: WebSurfaceStore::new(),
            _command_subscription: command_subscription,
            _translucency_subscription: translucency_subscription,
        };
        start_external_web_surface_timer(cx);
        shell
    }

    fn focus_command_mode(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state {
            core.set_command_query(">");
        }

        self.command_input.update(cx, |input, cx| {
            input.set_value(">", window, cx);
            input.focus(window, cx);
        });
        cx.notify();
    }

    fn select_tab(&mut self, tab_id: &TabId, window: &mut Window, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.select_tab(tab_id).is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn select_space(&mut self, space_id: &SpaceId, window: &mut Window, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.select_space(space_id).is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn select_profile(
        &mut self,
        profile_id: &ProfileId,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        if let ShellState::Ready(core) = &mut self.state
            && core.select_profile(profile_id).is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn select_next_tab(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.select_next_tab().is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn select_previous_tab(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.select_previous_tab().is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn close_active_tab(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.close_active_tab().is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn restore_closed_tab(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.restore_last_archived_tab().is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn restore_archived_tab(
        &mut self,
        tab_id: &TabId,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        if let ShellState::Ready(core) = &mut self.state
            && core.restore_archived_tab(tab_id).is_ok()
        {
            self.sync_address_input(window, cx);
            cx.notify();
        }
    }

    fn toggle_active_tab_favorite(&mut self, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.toggle_active_tab_favorite().is_ok()
        {
            cx.notify();
        }
    }

    fn toggle_active_tab_pinned(&mut self, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.toggle_active_tab_pinned().is_ok()
        {
            cx.notify();
        }
    }

    fn zoom_active_tab_in(&mut self, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.zoom_active_tab_in().is_ok()
        {
            cx.notify();
        }
    }

    fn zoom_active_tab_out(&mut self, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.zoom_active_tab_out().is_ok()
        {
            cx.notify();
        }
    }

    fn reset_active_tab_zoom(&mut self, cx: &mut Context<Self>) {
        if let ShellState::Ready(core) = &mut self.state
            && core.reset_active_tab_zoom().is_ok()
        {
            cx.notify();
        }
    }

    fn on_close_current_tab(
        &mut self,
        _: &CloseCurrentTab,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.close_active_tab(window, cx);
    }

    fn on_focus_address_bar(
        &mut self,
        _: &FocusAddressBar,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.focus_address_bar(window, cx);
    }

    fn on_focus_command_mode(
        &mut self,
        _: &FocusCommandMode,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.focus_command_mode(window, cx);
    }

    fn on_open_new_tab(&mut self, _: &OpenNewTab, window: &mut Window, cx: &mut Context<Self>) {
        self.open_new_tab(window, cx);
    }

    fn on_open_downloads(
        &mut self,
        _: &OpenDownloads,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.open_downloads(window, cx);
    }

    fn on_download_current_page(
        &mut self,
        _: &DownloadCurrentPage,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.download_active_tab(window, cx);
    }

    fn on_open_history(&mut self, _: &OpenHistory, window: &mut Window, cx: &mut Context<Self>) {
        self.open_history(window, cx);
    }

    fn on_open_settings(&mut self, _: &OpenSettings, window: &mut Window, cx: &mut Context<Self>) {
        self.open_settings(window, cx);
    }

    fn on_open_task_manager(
        &mut self,
        _: &OpenTaskManager,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.open_task_manager(window, cx);
    }

    fn on_restore_closed_tab(
        &mut self,
        _: &RestoreClosedTab,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.restore_closed_tab(window, cx);
    }

    fn on_reset_zoom(&mut self, _: &ResetZoom, _: &mut Window, cx: &mut Context<Self>) {
        self.reset_active_tab_zoom(cx);
    }

    fn on_select_next_tab(
        &mut self,
        _: &SelectNextTab,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.select_next_tab(window, cx);
    }

    fn on_select_previous_tab(
        &mut self,
        _: &SelectPreviousTab,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.select_previous_tab(window, cx);
    }

    fn on_toggle_favorite_tab(
        &mut self,
        _: &ToggleFavoriteTab,
        _: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.toggle_active_tab_favorite(cx);
    }

    fn on_toggle_pinned_tab(
        &mut self,
        _: &TogglePinnedTab,
        _: &mut Window,
        cx: &mut Context<Self>,
    ) {
        self.toggle_active_tab_pinned(cx);
    }

    fn on_zoom_in(&mut self, _: &ZoomIn, _: &mut Window, cx: &mut Context<Self>) {
        self.zoom_active_tab_in(cx);
    }

    fn on_zoom_out(&mut self, _: &ZoomOut, _: &mut Window, cx: &mut Context<Self>) {
        self.zoom_active_tab_out(cx);
    }
}

fn start_external_web_surface_timer(cx: &mut Context<ElyShell>) {
    cx.spawn(async move |shell, cx| {
        loop {
            Timer::after(Duration::from_millis(16)).await;
            let result = shell.update(cx, |shell, cx| {
                if shell.tick_external_web_surfaces() {
                    cx.notify();
                }
            });
            if result.is_err() {
                break;
            }
        }
    })
    .detach();
}