// Author: fruit.com.cn

import 'dart:async';

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

import '../../core/data/models/drama.dart';
import '../../core/data/models/watch_progress.dart';
import '../../core/data/repositories/watch_history_repository.dart';
import '../../core/data/services/auth_controller.dart';
import '../../core/data/services/catalog_controller.dart';
import '../../core/data/services/download_controller.dart';
import '../../core/data/services/wallet_controller.dart';
import '../../core/theme/app_colors.dart';
import '../../core/theme/app_theme.dart';
import '../../core/widgets/app_bottom_nav.dart';
import '../../core/widgets/auth_gate.dart';
import '../../l10n/app_localizations.dart';
import '../downloads/downloads_page.dart';
import '../favorites/favorites_page.dart';
import '../player/player_view.dart';
import '../settings/settings_page.dart';
import '../store/vip_page.dart';
import '../wallet/wallet_page.dart';
import '../watch_records/watch_records_page.dart';
import 'mine_binding.dart';
import 'mine_logic.dart';
import 'mine_types.dart';
import 'widgets/continue_watching_card.dart';
import 'widgets/mine_header.dart';
import 'widgets/mine_menu.dart';

/// 极简「我的」页：续看 + 追剧 / 历史 / 下载 / 钱包 / 会员 / 设置。
class MyPage extends StatefulWidget {
  const MyPage({
    super.key,
    this.active = true,
    this.callbacks = const MyPageCallbacks(),
  });

  final bool active;
  final MyPageCallbacks callbacks;

  @override
  State<MyPage> createState() => _MyPageState();
}

class _MyPageState extends State<MyPage> {
  late final MineLogic logic;

  bool get embedded => widget.callbacks.embedded;

  @override
  void initState() {
    super.initState();
    logic = MineBinding().create(
      history: context.read<WatchHistoryRepository>(),
    );
  }

  @override
  void didUpdateWidget(covariant MyPage oldWidget) {
    super.didUpdateWidget(oldWidget);
    logic.syncPage(active: widget.active, wasActive: oldWidget.active);
  }

  @override
  void dispose() {
    logic.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ListenableBuilder(
      listenable: logic,
      builder: (context, _) => _page(context),
    );
  }

  Widget _page(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final content = SafeArea(
      bottom: !embedded,
      child: Column(
        children: [
          _topBar(l10n),
          Expanded(child: _body(context, l10n)),
          if (!embedded) _bottomNav(l10n),
        ],
      ),
    );
    return Theme(
      data: AppTheme.light(),
      child: embedded
          ? content
          : Scaffold(backgroundColor: AppColors.ink, body: content),
    );
  }

  Widget _topBar(AppLocalizations l10n) {
    return SizedBox(
      height: 46,
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 14),
        child: Row(
          children: [
            Container(
              width: 24,
              height: 24,
              alignment: Alignment.center,
              decoration: BoxDecoration(
                color: AppColors.blue,
                borderRadius: BorderRadius.circular(7),
              ),
              child: const Icon(
                Icons.play_arrow_rounded,
                color: AppColors.onPrimary,
                size: 16,
              ),
            ),
            const SizedBox(width: 8),
            Text(
              l10n.myTab,
              style: const TextStyle(
                fontFamily: 'Outfit',
                color: AppColors.onSurface,
                fontSize: 15,
                fontWeight: FontWeight.w800,
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _body(BuildContext context, AppLocalizations l10n) {
    final auth = context.watch<AuthController>();
    final wallet = context.watch<WalletController>();
    final record = _continueRecord;
    final drama = _dramaFor(record);
    return ListView(
      padding: const EdgeInsets.only(bottom: 18),
      children: [
        const MineHeader(),
        if (drama != null && record != null)
          ContinueWatchingCard(
            drama: drama,
            record: record,
            onResume: () => _resume(drama),
          ),
        const SizedBox(height: 14),
        Padding(
          padding: const EdgeInsets.symmetric(horizontal: 14),
          child: MineMenu(
            walletValue: _walletValue(l10n, auth, wallet),
            onOpen: _openDestination,
          ),
        ),
      ],
    );
  }

  String _walletValue(
    AppLocalizations l10n,
    AuthController auth,
    WalletController wallet,
  ) {
    if (!auth.isSignedIn) return l10n.logInHint;
    if (wallet.snapshot == null) return l10n.coins;
    return l10n.walletBalanceShort(wallet.balance);
  }

  WatchProgress? get _continueRecord {
    for (final record in logic.recent) {
      if (!record.finished && record.hasPosition) return record;
    }
    return null;
  }

  Drama? _dramaFor(WatchProgress? record) {
    if (record == null) return null;
    for (final drama in context.read<CatalogController>().dramas) {
      if (drama.id == record.dramaId) return drama;
    }
    return null;
  }

  void _resume(Drama drama) {
    final callback = widget.callbacks.onDramaSelected;
    if (callback != null) {
      callback(drama);
      return;
    }
    Navigator.of(context).push<void>(
      MaterialPageRoute(
        builder: (_) => PlayerPage(
          drama: drama,
          initialIndex: 0,
          wallet: context.read<WalletController>(),
          downloads: context.read<DownloadController>(),
        ),
      ),
    );
  }

  void _openDestination(MineDestination destination) {
    switch (destination) {
      case MineDestination.watchlist:
        _push(const FavoritesPage());
      case MineDestination.history:
        _push(const WatchRecordsPage());
      case MineDestination.downloads:
        _push(const DownloadsPage());
      case MineDestination.wallet:
        _openProtected(const WalletPage());
      case MineDestination.vip:
        _openVip();
      case MineDestination.settings:
        _push(const SettingsPage());
    }
  }

  void _push(Widget page) {
    Navigator.of(context).push<void>(MaterialPageRoute(builder: (_) => page));
  }

  Future<void> _openProtected(Widget page) async {
    if (!context.read<AuthController>().isSignedIn) {
      await ensureSignedIn(context);
      return;
    }
    if (mounted) _push(page);
  }

  void _openVip() {
    final wallet = context.read<WalletController>();
    _openProtected(VipPage(onPurchased: () => unawaited(wallet.load())));
  }

  Widget _bottomNav(AppLocalizations l10n) {
    return AppBottomNav(
      items: [
        AppBottomNavItem(
          tabKey: const Key('mine-nav-home'),
          icon: Icons.home_outlined,
          selectedIcon: Icons.home_rounded,
          label: l10n.homeTab,
          onTap: () => _act(MyPageAction.home),
        ),
        AppBottomNavItem(
          tabKey: const Key('mine-nav-discover'),
          icon: Icons.explore_outlined,
          selectedIcon: Icons.explore_rounded,
          label: l10n.theaterTab,
          onTap: () => _act(MyPageAction.discover),
        ),
        AppBottomNavItem(
          tabKey: const Key('mine-nav-create'),
          icon: Icons.add_box_outlined,
          selectedIcon: Icons.add_box_rounded,
          label: l10n.createTab,
          onTap: () => _act(MyPageAction.create),
        ),
        AppBottomNavItem(
          tabKey: const Key('mine-nav-current'),
          icon: Icons.video_library_outlined,
          selectedIcon: Icons.video_library_rounded,
          label: l10n.myTab,
          selected: true,
          onTap: () {},
        ),
      ],
    );
  }

  void _act(MyPageAction action) {
    logic.act(
      context,
      action,
      embedded: embedded,
      onAction: widget.callbacks.onAction,
    );
  }
}