import Adw from 'gi://Adw';
import Gtk from 'gi://Gtk';
import Gio from 'gi://Gio';
import GLib from 'gi://GLib';

import { ExtensionPreferences, gettext as _ } from 'resource:///org/gnome/Shell/Extensions/js/extensions/prefs.js';

export default class ClaudeCodeStatusPreferences extends ExtensionPreferences {
    fillPreferencesWindow(window) {
        const settings = this.getSettings();

        const page = new Adw.PreferencesPage({
            title: _('General'),
            icon_name: 'utilities-terminal-symbolic',
        });
        window.add(page);

        const dispGroup = new Adw.PreferencesGroup({ title: _('Panel') });
        page.add(dispGroup);

        dispGroup.add(this._switchRow(settings, 'show-project-name',
            _('Label chips with the project'),
            _('Name the sessions, not just their states.')));
        dispGroup.add(this._switchRow(settings, 'abbreviate-names',
            _('Shorten names to three characters'),
            _('“dev-skills” becomes “ds”. Collisions get a digit by seniority, so a label already on screen never changes.')));
        dispGroup.add(this._spinRow(settings, 'max-chips',
            _('Chips shown'),
            _('The most urgent sessions get a chip; the rest are counted as “+N”.'),
            1, 12));
        dispGroup.add(this._switchRow(settings, 'show-age',
            _('Show time in state'),
            _('Shown on the most urgent session only.')));

        const zellijGroup = new Adw.PreferencesGroup({
            title: _('zellij'),
            description: _('Sessions running inside zellij can be located by tab name instead of by path.'),
        });
        page.add(zellijGroup);

        zellijGroup.add(this._switchRow(settings, 'zellij-integration',
            _('Resolve tab names'),
            _('Name the zellij tab each session runs in. Ignored when zellij is not installed.')));

        // --- Hooks ---------------------------------------------------------
        // The indicator is only as good as the hooks feeding it, and a silent
        // panel looks identical whether nothing is running or nothing is
        // installed. Say which it is.
        const hooksGroup = new Adw.PreferencesGroup({
            title: _('Hooks'),
            description: _('Claude Code writes one state file per session; the panel watches them.'),
        });
        page.add(hooksGroup);

        hooksGroup.add(new Adw.ActionRow({
            title: _('Status'),
            subtitle: this._hooksStatus(),
        }));
        hooksGroup.add(new Adw.ActionRow({
            title: _('State directory'),
            subtitle: this._stateDir(),
        }));

        const installRow = new Adw.ActionRow({
            title: _('Install command'),
            subtitle: `${this.path}/hooks/install.py`,
        });
        const copyButton = new Gtk.Button({
            icon_name: 'edit-copy-symbolic',
            valign: Gtk.Align.CENTER,
            tooltip_text: _('Copy to clipboard'),
        });
        copyButton.connect('clicked', () => {
            window.get_clipboard().set(`${this.path}/hooks/install.py`);
        });
        installRow.add_suffix(copyButton);
        hooksGroup.add(installRow);
    }

    _stateDir() {
        const base = GLib.getenv('XDG_STATE_HOME') ||
            GLib.build_filenamev([GLib.get_home_dir(), '.local', 'state']);
        return GLib.build_filenamev([base, 'claude-code-status']);
    }

    _hooksStatus() {
        const path = GLib.build_filenamev([GLib.get_home_dir(), '.claude', 'settings.json']);
        // Checked before reading: file_get_contents throws on a missing file,
        // so without this the person who has installed nothing -- the one who
        // most needs the instructions -- is told the file cannot be parsed.
        if (!GLib.file_test(path, GLib.FileTest.EXISTS))
            return _('No ~/.claude/settings.json yet — run the install command below');
        try {
            const [ok, bytes] = GLib.file_get_contents(path);
            if (!ok)
                return _('~/.claude/settings.json is unreadable');
            const settings = JSON.parse(new TextDecoder().decode(bytes));
            const events = Object.entries(settings.hooks ?? {})
                .filter(([, groups]) => groups.some(g =>
                    (g.hooks ?? []).some(h => (h.command ?? '').includes('claude-status-hook.py'))))
                .map(([event]) => event);
            if (!events.length)
                return _('Not installed — run the install command below');
            return `${_('Installed for')}: ${events.join(', ')}`;
        } catch (e) {
            return _('~/.claude/settings.json could not be parsed');
        }
    }

    _spinRow(settings, key, title, subtitle, lower, upper) {
        const row = new Adw.SpinRow({
            title, subtitle,
            adjustment: new Gtk.Adjustment({
                lower, upper, step_increment: 1, page_increment: 1,
            }),
        });
        settings.bind(key, row, 'value', Gio.SettingsBindFlags.DEFAULT);
        return row;
    }

    _switchRow(settings, key, title, subtitle) {
        const row = new Adw.SwitchRow({ title, subtitle });
        settings.bind(key, row, 'active', Gio.SettingsBindFlags.DEFAULT);
        return row;
    }
}