import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../../providers/trakt_scrobble_status_provider.dart';
import '../../../providers/trakt_settings_provider.dart';
import '../../../shared/widgets/app_inline_alert.dart';
import '../../../shared/widgets/app_loading_ring.dart';
import '../widgets/settings_card.dart';

class TraktSettingsTab extends ConsumerWidget {
  final void Function(String message, {AppAlertTone tone}) onFeedback;

  const TraktSettingsTab({super.key, required this.onFeedback});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final trakt = ref.watch(traktSettingsProvider);

    return SettingsTabScroll(
      children: [
        trakt.when(
          data: (data) => TraktSection(state: data, onFeedback: onFeedback),
          loading: () => const Padding(
            padding: EdgeInsets.symmetric(vertical: 32),
            child: Center(child: AppLoadingRing()),
          ),
          error: (e, _) => SettingsCard(children: [settingsLoadError(e)]),
        ),
      ],
    );
  }
}

class TraktSection extends ConsumerStatefulWidget {
  final TraktState state;
  final void Function(String message, {AppAlertTone tone}) onFeedback;

  const TraktSection({
    super.key,
    required this.state,
    required this.onFeedback,
  });

  @override
  ConsumerState<TraktSection> createState() => TraktSectionState();
}

class TraktSectionState extends ConsumerState<TraktSection> {
  bool _busy = false;

  @override
  Widget build(BuildContext context) {
    final s = widget.state;

    if (s.isConnected) {
      return SettingsCard(
        children: [
          SettingRow(
            title: '已连接',
            subtitle: s.username.isEmpty ? 'Trakt 账号' : '@${s.username}',
            trailing: const Icon(
              Icons.check_circle,
              size: 18,
              color: Color(0xFF52C41A),
            ),
          ),
          SettingRow(
            title: '断开连接',
            subtitle: '清除本地保存的 Trakt 令牌',
            trailing: _busy
                ? const AppLoadingRing(size: 18)
                : const Icon(Icons.logout, size: 18),
            onTap: _busy ? null : _disconnect,
          ),
        ],
      );
    }

    return SettingsCard(
      children: [
        SettingRow(
          title: '连接 Trakt',
          subtitle: '通过浏览器授权你的 Trakt 账号',
          trailing: _busy
              ? const AppLoadingRing(size: 18)
              : const Icon(Icons.open_in_new, size: 18),
          onTap: _busy ? null : _connect,
        ),
      ],
    );
  }

  Future<void> _connect() async {
    setState(() => _busy = true);
    String? message;
    var tone = AppAlertTone.success;
    try {
      await ref.read(traktSettingsProvider.notifier).connect();
      message = '已连接 Trakt';
      unawaited(ref.read(traktScrobbleStatusProvider.notifier).retryPending());
    } on TraktConnectException catch (e) {
      message = e.message;
      tone = AppAlertTone.error;
    } catch (_) {
      message = '连接失败';
      tone = AppAlertTone.error;
    }
    if (!mounted) return;
    setState(() => _busy = false);
    _toast(message, tone: tone);
  }

  Future<void> _disconnect() async {
    setState(() => _busy = true);
    await ref.read(traktSettingsProvider.notifier).disconnect();
    if (!mounted) return;
    setState(() => _busy = false);
    _toast('已断开 Trakt', tone: AppAlertTone.success);
  }

  void _toast(String message, {AppAlertTone tone = AppAlertTone.info}) {
    widget.onFeedback(message, tone: tone);
  }
}