// Author: fruit.com.cn

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

import '../../core/data/models/drama.dart';
import '../discover/discover_types.dart';
import '../drama_detail/drama_detail_view.dart';
import '../favorites/favorites_page.dart';
import '../mine/mine_types.dart';
import '../player/open_player.dart';
import '../watch_records/watch_records_page.dart';

class HomeLogic extends ChangeNotifier {
  HomeLogic(List<Drama> dramas) : currentDrama = dramas.first;

  final scaffoldKey = GlobalKey<ScaffoldState>();
  Drama currentDrama;
  int tab = 0;
  int searchRequest = 0;
  int resumeRequest = 0;
  int backRequest = 0;
  bool drawerOpen = false;
  bool detailOpen = false;
  bool videoImmersive = false;
  bool _dramaNotifyScheduled = false;
  bool _disposed = false;

  void notify() {
    if (!_disposed) notifyListeners();
  }

  void select(int nextTab, {bool search = false, bool resume = false}) {
    FocusManager.instance.primaryFocus?.unfocus();
    tab = nextTab;
    if (search) searchRequest++;
    if (resume) resumeRequest++;
    notify();
  }

  void setMenuOpen(bool value) {
    if (drawerOpen == value) return;
    drawerOpen = value;
    notify();
  }

  Future<void> openCurrentSeries(BuildContext context) async {
    detailOpen = true;
    notify();
    await WidgetsBinding.instance.endOfFrame;
    if (!context.mounted) return;
    try {
      await Navigator.of(context).push<void>(
        MaterialPageRoute(builder: (_) => DramaDetailPage(drama: currentDrama)),
      );
    } finally {
      if (context.mounted) {
        detailOpen = false;
        notify();
      }
    }
  }

  void openDrama(BuildContext context, Drama drama) {
    Navigator.of(context).push(
      MaterialPageRoute<void>(builder: (_) => DramaDetailPage(drama: drama)),
    );
  }

  Future<void> playDrama(
    BuildContext context,
    Drama drama, {
    String? episodeId,
  }) => playDramaFromCatalog(context, drama, episodeId: episodeId);

  void openProfile() => select(3);

  void discoverAction(DiscoverPageAction action) {
    switch (action) {
      case DiscoverPageAction.home:
        select(0);
      case DiscoverPageAction.recommend:
        select(1, search: true);
      case DiscoverPageAction.following:
        select(2);
      case DiscoverPageAction.mine:
        select(3);
    }
  }

  void openFavorites(BuildContext context) {
    Navigator.of(
      context,
    ).push(MaterialPageRoute<void>(builder: (_) => const FavoritesPage()));
  }

  void openHistory(BuildContext context) {
    Navigator.of(
      context,
    ).push(MaterialPageRoute<void>(builder: (_) => const WatchRecordsPage()));
  }

  void myAction(MyPageAction action) {
    switch (action) {
      case MyPageAction.home:
        select(0);
      case MyPageAction.recommend:
        select(1, search: true);
      case MyPageAction.following:
        select(2);
      case MyPageAction.mine:
        select(3);
      case MyPageAction.resume:
        select(0, resume: true);
    }
  }

  void onSystemBack() {
    if (videoImmersive) {
      backRequest++;
      notify();
    } else if (tab != 0) {
      select(0);
    }
  }

  void onDramaChanged(Drama drama) {
    currentDrama = drama;
    if (SchedulerBinding.instance.schedulerPhase == SchedulerPhase.idle) {
      notify();
      return;
    }
    if (_dramaNotifyScheduled || _disposed) return;
    _dramaNotifyScheduled = true;
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _dramaNotifyScheduled = false;
      if (!_disposed) notify();
    });
    SchedulerBinding.instance.scheduleFrame();
  }

  void onImmersiveChanged(bool value) {
    videoImmersive = value;
    notify();
  }

  @override
  void dispose() {
    _disposed = true;
    super.dispose();
  }
}