/// Visual browser for decoded sprite assets and their inferred gameplay roles.
library;

import 'package:flutter/material.dart';
import 'package:wolf_3d_dart/wolf_3d_data_types.dart';
import 'package:wolf_3d_dart/wolf_3d_entities.dart';
import 'package:wolf_3d_flutter/wolf_3d_flutter.dart';
import 'package:wolf_3d_gui/screens/gallery_game_selector.dart';
import 'package:wolf_3d_renderer/wolf_3d_asset_painter.dart';

/// Displays every sprite frame in the active game along with enemy metadata.
class SpriteGallery extends StatefulWidget {
  /// Shared application facade used to access the active game's sprite set.
  final Wolf3d wolf3d;

  /// Creates the sprite gallery for [wolf3d].
  const SpriteGallery({super.key, required this.wolf3d});

  @override
  State<SpriteGallery> createState() => _SpriteGalleryState();
}

class _SpriteGalleryState extends State<SpriteGallery> {
  late WolfensteinData _selectedGame;

  @override
  void initState() {
    super.initState();
    _selectedGame =
        widget.wolf3d.maybeActiveGame ?? widget.wolf3d.availableGames.first;
  }

  bool get isShareware => _selectedGame.version == GameVersion.shareware;

  List<Sprite> get _sprites => _selectedGame.sprites;

  void _selectGame(WolfensteinData game) {
    if (identical(_selectedGame, game)) {
      return;
    }

    widget.wolf3d.setActiveGame(game);
    setState(() {
      _selectedGame = game;
    });
  }

  String _buildSpriteLabel(int index) {
    String label = 'Sprite Index: $index';
    for (final enemy in EnemyType.values) {
      // The gallery infers likely ownership from sprite index ranges so
      // debugging art packs does not require cross-referencing source.
      if (enemy.claimsSpriteIndex(index, isShareware: isShareware)) {
        final EnemyAnimation? animation = enemy.getAnimationFromSprite(
          index,
          isShareware: isShareware,
        );

        label += '\n${enemy.name}';
        if (animation != null) {
          label += '\n${animation.name}';
        }
        break;
      }
    }

    return label;
  }

  void _showImagePreviewDialog(BuildContext context, int index) {
    final Sprite sprite = _sprites[index];

    showDialog<void>(
      context: context,
      builder: (dialogContext) {
        return AlertDialog(
          title: Text(
            '${_buildSpriteLabel(index)}\n64 x 64',
            style: const TextStyle(
              fontSize: 14,
              fontWeight: FontWeight.w600,
            ),
          ),
          actions: [
            TextButton(
              onPressed: () => Navigator.of(dialogContext).pop(),
              child: const Text('Close'),
            ),
          ],
          content: Center(
            child: AspectRatio(
              aspectRatio: 1,
              child: WolfAssetPainter.sprite(sprite),
            ),
          ),
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Sprite Gallery'),
        automaticallyImplyLeading: true,
        actions: [
          if (widget.wolf3d.availableGames.length > 1)
            GalleryGameSelector(
              wolf3d: widget.wolf3d,
              selectedGame: _selectedGame,
              onSelected: _selectGame,
            ),
        ],
      ),
      backgroundColor: Colors.black,
      body: GridView.builder(
        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 8,
          crossAxisSpacing: 8,
          mainAxisSpacing: 8,
        ),
        itemCount: _sprites.length,
        itemBuilder: (context, index) {
          final String label = _buildSpriteLabel(index);

          return Card(
            color: Colors.blueGrey,
            child: InkWell(
              onTap: () => _showImagePreviewDialog(context, index),
              child: Column(
                spacing: 8,
                children: [
                  Text(
                    label,
                    style: const TextStyle(color: Colors.white, fontSize: 10),
                    textAlign: TextAlign.center,
                  ),
                  Expanded(
                    child: Center(
                      child: AspectRatio(
                        aspectRatio: 1,
                        child: WolfAssetPainter.sprite(_sprites[index]),
                      ),
                    ),
                  ),
                ],
              ),
            ),
          );
        },
      ),
    );
  }
}