import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:get_it/get_it.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:tangocard_reader/models/data_entry.dart';
import 'package:tangocard_reader/screens/practise/kanji.dart';

import 'flashcard.dart';

class PractiseView extends StatefulWidget {
  final List<DataEntry> entries;
  final bool isKanji;
  final int index;

  const PractiseView({
    Key? key,
    required this.entries,
    required this.isKanji,
    this.index = 0,
  }) : super(key: key);

  @override
  State<PractiseView> createState() => _PractiseViewState();
}

const encouragingWords = [
  '頑張れ〜！',
  'できるぞ！',
  'ヨッシャー！',
  'いけいけー！',
];

class _PractiseViewState extends State<PractiseView> {
  late int currentCard;

  SharedPreferences get prefs => GetIt.instance.get<SharedPreferences>();

  set isShuffleMode(b) => prefs.setBool('shuffleMode', b);
  set isLanguageSwitchedMode(b) => prefs.setBool('languageSwitchedMode', b);
  set isKanjiDrawingMode(b) => prefs.setBool('kanjiDrawingMode', b);
  set isKanjiAnimationMode(b) => prefs.setBool('kanjiAnimationMode', b);

  bool get isShuffleMode => prefs.getBool('shuffleMode') ?? false;
  bool get isLanguageSwitchedMode =>
      prefs.getBool('languageSwitchedMode') ?? false;
  bool get isKanjiDrawingMode => prefs.getBool('kanjiDrawingMode') ?? false;
  bool get isKanjiAnimationMode => prefs.getBool('kanjiAnimationMode') ?? false;

  List<bool> get _flashcardToggles => [isShuffleMode, isLanguageSwitchedMode];
  List<bool> get _kanjiToggles => [isKanjiDrawingMode, isKanjiAnimationMode];

  int get randomCard => Random().nextInt(widget.entries.length);
  String get randomEncouragingWord =>
      encouragingWords[Random().nextInt(encouragingWords.length)];
  bool get isPhone =>
      MediaQueryData.fromWindow(WidgetsBinding.instance!.window)
          .size
          .shortestSide <
      600;

  @override
  void initState() {
    currentCard = widget.index;

    if (isPhone) {
      if (widget.isKanji) {
        SystemChrome.setPreferredOrientations([
          DeviceOrientation.portraitUp,
          DeviceOrientation.portraitDown,
        ]);
      } else {
        SystemChrome.setPreferredOrientations([
          DeviceOrientation.landscapeLeft,
          DeviceOrientation.landscapeRight,
        ]);
      }
    }

    super.initState();
  }

  @override
  void dispose() {
    SystemChrome.setPreferredOrientations([
      DeviceOrientation.landscapeRight,
      DeviceOrientation.landscapeLeft,
      DeviceOrientation.portraitUp,
      DeviceOrientation.portraitDown,
    ]);
    super.dispose();
  }

  AppBar get flashcardAppBar => AppBar(
        title: Row(
          children: [
            Expanded(child: Container()),
            Text(randomEncouragingWord),
            Expanded(child: Container()),
            IconButton(
              onPressed: () => setState(() => currentCard = 0),
              icon: const Icon(Icons.repeat),
            ),
            ToggleButtons(
                selectedColor: Colors.white,
                children: const [
                  Icon(Icons.shuffle),
                  Icon(Icons.translate),
                ],
                isSelected: _flashcardToggles,
                onPressed: (int index) => setState(
                      () {
                        if (index == 0) {
                          isShuffleMode = !_flashcardToggles[index];
                        } else if (index == 1) {
                          isLanguageSwitchedMode = !_flashcardToggles[index];
                        }
                      },
                    )),
          ],
        ),
        centerTitle: true,
      );

  AppBar get kanjiAppBar => AppBar(
        title: Row(
          children: [
            Expanded(child: Container()),
            Text(randomEncouragingWord),
            Expanded(child: Container()),
            IconButton(
              onPressed: () => setState(() => currentCard = 0),
              icon: const Icon(Icons.repeat),
            ),
            ToggleButtons(
              selectedColor: Colors.white,
              children: const [
                Icon(Icons.edit),
                Icon(Icons.animation),
              ],
              isSelected: _kanjiToggles,
              onPressed: (int index) => setState(
                () {
                  if (index == 0) {
                    isKanjiDrawingMode = !_flashcardToggles[index];
                  } else if (index == 1) {
                    isKanjiAnimationMode = !_flashcardToggles[index];
                  }
                },
              ),
            ),
          ],
        ),
        centerTitle: true,
      );

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: widget.isKanji ? kanjiAppBar : flashcardAppBar,
        body: widget.isKanji
            ? KanjiPage(
                entry: widget.entries[currentCard] as KanjiEntry,
                index: currentCard,
                showDrawingPanel: isKanjiDrawingMode,
                showStrokeOrder: isKanjiAnimationMode,
                onNextCard: () => setState(() {
                  currentCard = isShuffleMode ? randomCard : currentCard + 1;
                  if (currentCard == widget.entries.length) currentCard = 0;
                }),
                onPreviousCard: () => setState(() {
                  currentCard = isShuffleMode ? randomCard : currentCard - 1;
                  if (currentCard == -1) {
                    currentCard = widget.entries.length - 1;
                  }
                }),
              )
            : FlashcardPage(
                card: widget.entries[currentCard] as YokutangoEntry,
                index: currentCard,
                languageFlipped: isLanguageSwitchedMode,
                onNextCard: () => setState(() {
                  currentCard = isShuffleMode ? randomCard : currentCard + 1;
                  if (currentCard == widget.entries.length) currentCard = 0;
                }),
                onPreviousCard: () => setState(() {
                  currentCard = isShuffleMode ? randomCard : currentCard - 1;
                  if (currentCard == -1) {
                    currentCard = widget.entries.length - 1;
                  }
                }),
              ),
      );
}