// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
/* exported ExtensionPrefsDialog */

const { Adw, Gdk, Gio, GLib, GObject, Gtk } = imports.gi;

const ExtensionUtils = imports.misc.extensionUtils;

var ExtensionPrefsDialog = GObject.registerClass({
    GTypeName: 'ExtensionPrefsDialog',
}, class ExtensionPrefsDialog extends Adw.PreferencesWindow {
    _init(extension) {
        super._init({
            title: extension.metadata.name,
            search_enabled: false,
        });

        try {
            ExtensionUtils.installImporter(extension);

            // give extension prefs access to their own extension object
            ExtensionUtils.setCurrentExtension(extension);

            const prefsModule = extension.imports.prefs;
            prefsModule.init(extension.metadata);

            if (prefsModule.fillPreferencesWindow) {
                prefsModule.fillPreferencesWindow(this);

                if (!this.visible_page)
                    throw new Error('Extension did not provide any UI');
            } else {
                const widget = prefsModule.buildPrefsWidget();
                const page = this._wrapWidget(widget);
                this.add(page);
            }
        } catch (e) {
            this._showErrorPage(e);
            logError(e, 'Failed to open preferences');
        }
    }

    set titlebar(w) {
        this.set_titlebar(w);
    }

    // eslint-disable-next-line camelcase
    set_titlebar() {
        // intercept fatal libadwaita error, show error page instead
        GLib.idle_add(GLib.PRIORITY_DEFAULT, () => {
            this._showErrorPage(
                new Error('set_titlebar() is not supported for Adw.Window'));
            return GLib.SOURCE_REMOVE;
        });
    }

    _showErrorPage(e) {
        while (this.visible_page)
            this.remove(this.visible_page);

        const extension = ExtensionUtils.getCurrentExtension();
        this.add(new ExtensionPrefsErrorPage(extension, e));
    }

    _wrapWidget(widget) {
        if (widget instanceof Adw.PreferencesPage)
            return widget;

        const page = new Adw.PreferencesPage();
        if (widget instanceof Adw.PreferencesGroup) {
            page.add(widget);
            return page;
        }

        const group = new Adw.PreferencesGroup();
        group.add(widget);
        page.add(group);

        return page;
    }
});

const ExtensionPrefsErrorPage = GObject.registerClass({
    GTypeName: 'ExtensionPrefsErrorPage',
    Template: 'resource:///org/gnome/Shell/Extensions/ui/extension-error-page.ui',
    InternalChildren: [
        'expander',
        'expanderArrow',
        'revealer',
        'errorView',
    ],
}, class ExtensionPrefsErrorPage extends Adw.PreferencesPage {
    static _classInit(klass) {
        super._classInit(klass);

        klass.install_action('page.copy-error',
            null,
            self => {
                const clipboard = self.get_display().get_clipboard();
                clipboard.set(self._errorMarkdown);
            });
        klass.install_action('page.show-url',
            null,
            self => Gtk.show_uri(self.get_root(), self._url, Gdk.CURRENT_TIME));

        return klass;
    }

    _init(extension, error) {
        super._init();

        this._addCustomStylesheet();

        this._uuid = extension.uuid;
        this._url = extension.metadata.url || '';

        this.action_set_enabled('page.show-url', this._url !== '');

        this._gesture = new Gtk.GestureClick({
            button: 0,
            exclusive: true,
        });
        this._expander.add_controller(this._gesture);

        this._gesture.connect('released', (gesture, nPress) => {
            if (nPress === 1)
                this._revealer.reveal_child = !this._revealer.reveal_child;
        });

        this._revealer.connect('notify::reveal-child', () => {
            this._expanderArrow.icon_name = this._revealer.reveal_child
                ? 'pan-down-symbolic'
                : 'pan-end-symbolic';
            this._syncExpandedStyle();
        });
        this._revealer.connect('notify::child-revealed',
            () => this._syncExpandedStyle());

        this._errorView.buffer.text = `${error}\n\nStack trace:\n`;
        // Indent stack trace.
        this._errorView.buffer.text +=
            error.stack.split('\n').map(line => `  ${line}`).join('\n');

        // markdown for pasting in gitlab issues
        let lines = [
            `The settings of extension ${this._uuid} had an error:`,
            '```',
            `${error}`,
            '```',
            '',
            'Stack trace:',
            '```',
            error.stack.replace(/\n$/, ''), // stack without trailing newline
            '```',
            '',
        ];
        this._errorMarkdown = lines.join('\n');
    }

    _syncExpandedStyle() {
        if (this._revealer.reveal_child)
            this._expander.add_css_class('expanded');
        else if (!this._revealer.child_revealed)
            this._expander.remove_css_class('expanded');
    }

    _addCustomStylesheet() {
        let provider = new Gtk.CssProvider();
        let uri = 'resource:///org/gnome/Shell/Extensions/css/application.css';
        try {
            provider.load_from_file(Gio.File.new_for_uri(uri));
        } catch (e) {
            logError(e, 'Failed to add application style');
        }
        Gtk.StyleContext.add_provider_for_display(Gdk.Display.get_default(),
            provider,
            Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION);
    }
});