import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../core/config/app_constants.dart';
import '../../domain/game/game_state.dart';
import '../providers/gen_filter_provider.dart';
import '../providers/game_provider.dart';
import '../providers/navigation_provider.dart';
import '../widgets/pokemon_image.dart';

class GuessPage extends ConsumerStatefulWidget {
  const GuessPage({Key? key}) : super(key: key);

  @override
  ConsumerState<GuessPage> createState() => _GuessPageState();
}

class _GuessPageState extends ConsumerState<GuessPage> {
  final TextEditingController _guessController = TextEditingController();
  bool _started = false;
  bool _genFilterOpen = false;

  @override
  void initState() {
    super.initState();
    // Démarre la partie après le premier frame (le provider est prêt).
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (!_started) {
        _started = true;
        ref.read(gameProvider.notifier).startNewGame();
      }
    });
  }

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

  Future<void> _onGuess() async {
    final result = await ref.read(gameProvider.notifier).submitGuess(_guessController.text);
    if (!mounted) return;
    final state = ref.read(gameProvider);

    switch (result) {
      case GuessResult.correct:
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
          content: Text(state.isShiny
              ? '✨ SHINY! You caught ${state.currentPokemon!.formatedName}! (+20 pts) ✨'
              : 'Correct! You caught ${state.currentPokemon!.formatedName}!'),
          backgroundColor: state.isShiny ? Colors.amber[800] : Colors.green,
        ));
        break;
      case GuessResult.wrong:
        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
            content: Text('Wrong guess! Try again.'), backgroundColor: Colors.orange));
        break;
      case GuessResult.gameOver:
        await _showGameOver();
        break;
      case GuessResult.invalid:
        break;
    }
    _guessController.clear();
  }

  Future<void> _showGameOver() async {
    final state = ref.read(gameProvider);
    final playAgain = await Navigator.pushNamed(
      context,
      '/game-over',
      arguments: {
        'pokemonName': state.currentPokemon!.formatedName,
        'score': state.currentScore,
        'streak': state.sessionCorrectCount,
        'pokemonImage': state.currentPokemon!.imageUrl,
      },
    ) as bool?;

    if (!mounted) return;
    if (playAgain == false) {
      ref.read(selectedTabProvider.notifier).set(0); // onglet LIST
    }
    // true (Try Again), false (Back to Pokédex) et null (geste retour système)
    // relancent tous une nouvelle partie pour ne pas rester bloqué en game over.
    await ref.read(gameProvider.notifier).startNewGame();
  }

  String _maskedName(String name) {
    if (name.length <= 2) return name; // trop court pour masquer utilement
    return '${name[0]}${List.filled(name.length - 2, '_').join()}${name[name.length - 1]}';
  }

  @override
  Widget build(BuildContext context) {
    final state = ref.watch(gameProvider);

    if (state.status == GameStatus.loading) {
      return const Center(child: CircularProgressIndicator());
    }
    if (state.currentPokemon == null || state.status == GameStatus.error) {
      return const Center(child: Text("Error loading Pokémon"));
    }

    final pokemon = state.currentPokemon!;
    final isGuessed = state.status == GameStatus.roundWon;

    return Container(
      decoration: const BoxDecoration(color: Color(0xFFC8D1D8)),
      child: Stack(
        children: [
          Positioned.fill(
            child: ListView.builder(
              itemCount: 100,
              physics: const NeverScrollableScrollPhysics(),
              itemBuilder: (context, index) => Container(
                height: 4,
                margin: const EdgeInsets.only(bottom: 4),
                color: Colors.black.withAlpha(2),
              ),
            ),
          ),
          SingleChildScrollView(
            child: Column(
              children: [
                // Silhouette screen
                Container(
                  height: 250,
                  width: double.infinity,
                  margin: const EdgeInsets.all(16),
                  decoration: BoxDecoration(
                    color: const Color(0xFF3B6EE3),
                    borderRadius: BorderRadius.circular(12),
                    border: Border.all(color: const Color(0xFF1B2333), width: 8),
                  ),
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      Expanded(
                        child: Padding(
                          padding: const EdgeInsets.all(16.0),
                          child: isGuessed
                              ? PokemonImage(
                                  imageUrl: state.isShiny ? pokemon.shinyImageUrl : pokemon.imageUrl,
                                  fallbackUrl: pokemon.imageUrl,
                                  fit: BoxFit.contain,
                                )
                              : PokemonImage(
                                  imageUrl: state.isShiny ? pokemon.shinyImageUrl : pokemon.imageUrl,
                                  fallbackUrl: pokemon.imageUrl,
                                  fit: BoxFit.contain,
                                  color: state.isShiny ? Colors.yellow[700]! : Colors.black,
                                  colorBlendMode: BlendMode.srcIn,
                                ),
                        ),
                      ),
                      Container(
                        color: const Color(0xFF1B2333),
                        width: double.infinity,
                        padding: const EdgeInsets.symmetric(vertical: 8),
                        child: Text(
                          state.isShiny ? "✨ SHINY POKÉMON DETECTED! ✨" : "WHO'S THAT POKÉMON?",
                          textAlign: TextAlign.center,
                          style: TextStyle(
                            color: state.isShiny ? Colors.yellow[400] : Colors.white,
                            fontSize: state.isShiny ? 18 : 22,
                            fontWeight: FontWeight.bold,
                            letterSpacing: 2,
                          ),
                        ),
                      )
                    ],
                  ),
                ),
                // Gen filter
                Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 16.0),
                  child: Column(
                    children: [
                      SizedBox(
                        width: double.infinity,
                        child: OutlinedButton.icon(
                          onPressed: () => setState(() => _genFilterOpen = !_genFilterOpen),
                          icon: Icon(
                            _genFilterOpen ? Icons.expand_less : Icons.filter_list,
                            color: const Color(0xFF1B2333),
                          ),
                          label: const Text(
                            'GEN FILTER',
                            style: TextStyle(
                              color: Color(0xFF1B2333),
                              fontWeight: FontWeight.bold,
                              fontSize: 16,
                              letterSpacing: 2,
                            ),
                          ),
                          style: OutlinedButton.styleFrom(
                            side: const BorderSide(color: Color(0xFF1B2333), width: 2),
                            padding: const EdgeInsets.symmetric(vertical: 12),
                            shape: const RoundedRectangleBorder(borderRadius: BorderRadius.zero),
                          ),
                        ),
                      ),
                      AnimatedSize(
                        duration: const Duration(milliseconds: 250),
                        curve: Curves.easeInOut,
                        child: _genFilterOpen
                            ? _GenFilterPanel(
                                selectedGens: ref.watch(genFilterProvider),
                                onToggle: (i) => ref.read(genFilterProvider.notifier).toggle(i),
                              )
                            : const SizedBox.shrink(),
                      ),
                    ],
                  ),
                ),
                const SizedBox(height: 12),
                // Lives
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: List.generate(AppConstants.startingLives, (index) {
                    return Icon(
                      index < state.lives ? Icons.favorite : Icons.favorite_border,
                      color: Colors.red,
                      size: 32,
                    );
                  }),
                ),
                const SizedBox(height: 16),
                // Guess section
                Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 24.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      const Text("IDENTIFICATION INPUT",
                          style: TextStyle(color: Colors.black54, fontSize: 12, fontWeight: FontWeight.bold)),
                      const SizedBox(height: 4),
                      if (state.isHintUsed)
                        Container(
                          width: double.infinity,
                          margin: const EdgeInsets.only(bottom: 12),
                          padding: const EdgeInsets.symmetric(vertical: 12),
                          decoration: BoxDecoration(
                            color: Colors.amber[100],
                            border: Border.all(color: Colors.amber[600]!, width: 2),
                            borderRadius: BorderRadius.circular(8),
                          ),
                          child: Text(
                            "HINT: ${_maskedName(pokemon.formatedName)}",
                            textAlign: TextAlign.center,
                            style: TextStyle(fontSize: 22, fontWeight: FontWeight.bold, color: Colors.amber[900], letterSpacing: 4),
                          ),
                        ),
                      Container(
                        decoration: BoxDecoration(
                          color: Colors.white,
                          border: Border.all(color: Colors.grey[400]!),
                        ),
                        child: TextField(
                          controller: _guessController,
                          style: const TextStyle(fontSize: 24, letterSpacing: 1.5),
                          decoration: const InputDecoration(
                            contentPadding: EdgeInsets.symmetric(horizontal: 16, vertical: 12),
                            border: InputBorder.none,
                            hintText: 'Enter Pokémon name...',
                          ),
                          onSubmitted: (_) => _onGuess(),
                        ),
                      ),
                      const SizedBox(height: 16),
                      if (isGuessed)
                        SizedBox(
                          width: double.infinity,
                          height: 60,
                          child: ElevatedButton(
                            onPressed: () => ref.read(gameProvider.notifier).loadNextPokemon(),
                            style: ElevatedButton.styleFrom(
                              backgroundColor: Colors.green,
                              shape: const RoundedRectangleBorder(borderRadius: BorderRadius.zero),
                            ),
                            child: const Text("CONTINUE",
                                style: TextStyle(fontSize: 24, color: Colors.white, fontWeight: FontWeight.bold, letterSpacing: 2)),
                          ),
                        )
                      else ...[
                        SizedBox(
                          width: double.infinity,
                          height: 60,
                          child: ElevatedButton(
                            onPressed: _onGuess,
                            style: ElevatedButton.styleFrom(
                              backgroundColor: const Color(0xFF3B6EE3),
                              shape: const RoundedRectangleBorder(borderRadius: BorderRadius.zero),
                            ),
                            child: const Text("GUESS!",
                                style: TextStyle(fontSize: 24, color: Colors.white, fontWeight: FontWeight.bold, letterSpacing: 2)),
                          ),
                        ),
                        const SizedBox(height: 16),
                        Row(
                          children: [
                            Expanded(
                              child: ElevatedButton.icon(
                                onPressed: (state.isHintUsed || state.hints <= 0)
                                    ? null
                                    : () => ref.read(gameProvider.notifier).useHint(),
                                icon: const Icon(Icons.lightbulb, color: Colors.black87),
                                label: Text("HINT (${state.hints})",
                                    style: const TextStyle(color: Colors.black87, fontWeight: FontWeight.bold, fontSize: 18)),
                                style: ElevatedButton.styleFrom(
                                  backgroundColor: Colors.amber,
                                  padding: const EdgeInsets.symmetric(vertical: 16),
                                  shape: const RoundedRectangleBorder(borderRadius: BorderRadius.zero),
                                ),
                              ),
                            ),
                            const SizedBox(width: 8),
                            Expanded(
                              child: ElevatedButton.icon(
                                onPressed: state.skips > 0
                                    ? () => ref.read(gameProvider.notifier).useSkip()
                                    : null,
                                icon: const Icon(Icons.skip_next, color: Colors.black87),
                                label: Text("SKIP (${state.skips})",
                                    style: const TextStyle(color: Colors.black87, fontWeight: FontWeight.bold, fontSize: 18)),
                                style: ElevatedButton.styleFrom(
                                  backgroundColor: Colors.grey[400],
                                  padding: const EdgeInsets.symmetric(vertical: 16),
                                  shape: const RoundedRectangleBorder(borderRadius: BorderRadius.zero),
                                ),
                              ),
                            ),
                          ],
                        ),
                      ],
                      const SizedBox(height: 24),
                      // Score
                      Container(
                        width: double.infinity,
                        padding: const EdgeInsets.all(16),
                        decoration: BoxDecoration(
                          color: Colors.white.withAlpha(153),
                          border: Border.all(color: Colors.black12),
                          borderRadius: BorderRadius.circular(8),
                        ),
                        child: Column(
                          children: [
                            const Text("CURRENT SCORE",
                                style: TextStyle(color: Colors.black54, fontSize: 14, fontWeight: FontWeight.bold)),
                            Text("${state.currentScore}",
                                style: const TextStyle(fontSize: 32, fontWeight: FontWeight.bold, color: Color(0xFF3B6EE3))),
                            const Divider(height: 24),
                            Text("PERSONAL BEST: ${state.bestScore}",
                                style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: Colors.black87)),
                          ],
                        ),
                      ),
                    ],
                  ),
                ),
                const SizedBox(height: 32),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

class _GenFilterPanel extends StatelessWidget {
  final Set<int> selectedGens;
  final void Function(int) onToggle;

  const _GenFilterPanel({required this.selectedGens, required this.onToggle});

  static const _genNames = ['Gen I', 'Gen II', 'Gen III', 'Gen IV', 'Gen V', 'Gen VI', 'Gen VII', 'Gen VIII', 'Gen IX'];

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: const EdgeInsets.only(top: 4),
      decoration: BoxDecoration(
        color: Colors.white,
        border: Border.all(color: const Color(0xFF1B2333), width: 2),
      ),
      child: Column(
        children: List.generate(AppConstants.genRanges.length, (i) {
          final range = AppConstants.genRanges[i];
          final isSelected = selectedGens.contains(i);
          final isLast = i == AppConstants.genRanges.length - 1;
          return InkWell(
            onTap: () => onToggle(i),
            child: Container(
              padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
              decoration: BoxDecoration(
                color: isSelected ? const Color(0xFF1B2333).withAlpha(12) : Colors.transparent,
                border: isLast ? null : Border(bottom: BorderSide(color: Colors.grey.shade200)),
              ),
              child: Row(
                children: [
                  AnimatedContainer(
                    duration: const Duration(milliseconds: 150),
                    width: 20,
                    height: 20,
                    decoration: BoxDecoration(
                      color: isSelected ? const Color(0xFF3B6EE3) : Colors.transparent,
                      border: Border.all(
                        color: isSelected ? const Color(0xFF3B6EE3) : Colors.grey.shade400,
                        width: 2,
                      ),
                      borderRadius: BorderRadius.circular(3),
                    ),
                    child: isSelected ? const Icon(Icons.check, size: 13, color: Colors.white) : null,
                  ),
                  const SizedBox(width: 12),
                  Expanded(
                    child: Text(
                      _genNames[i],
                      style: TextStyle(
                        fontSize: 16,
                        fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
                        color: isSelected ? const Color(0xFF1B2333) : Colors.black54,
                      ),
                    ),
                  ),
                  Text(
                    '#${range.$1}–#${range.$2}',
                    style: TextStyle(fontSize: 12, color: Colors.grey.shade500),
                  ),
                ],
              ),
            ),
          );
        }),
      ),
    );
  }
}