import 'package:flutter/material.dart';
import 'package:playmaker/screens/team_stats_page.dart';
import '../controllers/team_controller.dart';
import '../models/team_model.dart';
import '../utils/size_extension.dart'; 
import 'dart:math' as math;

class TeamsPage extends StatefulWidget {
  const TeamsPage({super.key});

  @override
  State<TeamsPage> createState() => _TeamsPageState();
}

class _TeamsPageState extends State<TeamsPage> {
  final TeamController controller = TeamController();
  final TextEditingController _searchController = TextEditingController();
  
  String _selectedSeason = 'Todas';
  String _currentSort = 'Recentes';
  String _searchQuery = '';

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

  void _showFilterDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (context) {
        return StatefulBuilder(
          builder: (context, setModalState) {
            return AlertDialog(
              backgroundColor: const Color(0xFF2C3E50), 
              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20 * context.sf)),
              title: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Text("Filtros de pesquisa", style: TextStyle(color: Colors.white, fontSize: 18 * context.sf, fontWeight: FontWeight.bold)),
                  IconButton(
                    icon: Icon(Icons.close, color: Colors.white, size: 20 * context.sf),
                    onPressed: () => Navigator.pop(context),
                  )
                ],
              ),
              content: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  const Divider(color: Colors.white24),
                  SizedBox(height: 16 * context.sf),
                  Row(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Expanded(
                        child: _buildPopupColumn(
                          title: "TEMPORADA",
                          options: ['Todas', '2023/24', '2024/25', '2025/26'],
                          currentValue: _selectedSeason,
                          onSelect: (val) {
                            setState(() => _selectedSeason = val);
                            setModalState(() {}); 
                          },
                        ),
                      ),
                      SizedBox(width: 20 * context.sf),
                      Expanded(
                        child: _buildPopupColumn(
                          title: "ORDENAR POR",
                          options: ['Recentes', 'Nome', 'Tamanho'],
                          currentValue: _currentSort,
                          onSelect: (val) {
                            setState(() => _currentSort = val);
                            setModalState(() {});
                          },
                        ),
                      ),
                    ],
                  ),
                ],
              ),
              actions: [
                TextButton(
                  onPressed: () => Navigator.pop(context),
                  child: Text("CONCLUÍDO", style: TextStyle(color: const Color(0xFFE74C3C), fontWeight: FontWeight.bold, fontSize: 14 * context.sf)),
                ),
              ],
            );
          },
        );
      },
    );
  }

  Widget _buildPopupColumn({required String title, required List<String> options, required String currentValue, required Function(String) onSelect}) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(title, style: TextStyle(color: Colors.grey, fontSize: 11 * context.sf, fontWeight: FontWeight.bold)),
        SizedBox(height: 12 * context.sf),
        ...options.map((opt) {
          final isSelected = currentValue == opt;
          return InkWell(
            onTap: () => onSelect(opt),
            child: Padding(
              padding: EdgeInsets.symmetric(vertical: 8.0 * context.sf),
              child: Text(
                opt,
                style: TextStyle(
                  color: isSelected ? const Color(0xFFE74C3C) : Colors.white70,
                  fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
                  fontSize: 14 * context.sf,
                ),
              ),
            ),
          );
        }).toList(),
      ],
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: const Color(0xFFF5F7FA),
      appBar: AppBar(
        title: Text("Minhas Equipas", style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20 * context.sf)),
        backgroundColor: const Color(0xFFF5F7FA),
        elevation: 0,
        actions: [
          IconButton(
            icon: Icon(Icons.filter_list, color: const Color(0xFFE74C3C), size: 24 * context.sf),
            onPressed: () => _showFilterDialog(context),
          ),
        ],
      ),
      body: Column(
        children: [
          _buildSearchBar(),
          Expanded(child: _buildTeamsList()),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        heroTag: 'add_team_btn',
        backgroundColor: const Color(0xFFE74C3C),
        child: Icon(Icons.add, color: Colors.white, size: 24 * context.sf),
        onPressed: () => _showCreateDialog(context),
      ),
    );
  }

  Widget _buildSearchBar() {
    final double safeSf = math.min(context.sf, 1.15); // Travão para a barra não ficar com margens gigantes
    return Padding(
      padding: EdgeInsets.all(16.0 * safeSf),
      child: TextField(
        controller: _searchController,
        onChanged: (v) => setState(() => _searchQuery = v.toLowerCase()),
        style: TextStyle(fontSize: 16 * safeSf),
        decoration: InputDecoration(
          hintText: 'Pesquisar equipa...',
          hintStyle: TextStyle(fontSize: 16 * safeSf),
          prefixIcon: Icon(Icons.search, color: const Color(0xFFE74C3C), size: 22 * safeSf),
          filled: true,
          fillColor: Colors.white,
          border: OutlineInputBorder(borderRadius: BorderRadius.circular(15 * safeSf), borderSide: BorderSide.none),
        ),
      ),
    );
  }

  Widget _buildTeamsList() {
    final double safeSf = math.min(context.sf, 1.15);

    return StreamBuilder<List<Map<String, dynamic>>>(
      stream: controller.teamsStream,
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) return const Center(child: CircularProgressIndicator());
        if (!snapshot.hasData || snapshot.data!.isEmpty) return Center(child: Text("Nenhuma equipa encontrada.", style: TextStyle(fontSize: 16 * safeSf)));

        var data = List<Map<String, dynamic>>.from(snapshot.data!);

        if (_selectedSeason != 'Todas') data = data.where((t) => t['season'] == _selectedSeason).toList();
        if (_searchQuery.isNotEmpty) data = data.where((t) => t['name'].toString().toLowerCase().contains(_searchQuery)).toList();

        data.sort((a, b) {
          bool favA = a['is_favorite'] ?? false;
          bool favB = b['is_favorite'] ?? false;
          if (favA && !favB) return -1; 
          if (!favA && favB) return 1;  
          if (_currentSort == 'Nome') return a['name'].toString().compareTo(b['name'].toString());
          else return (b['created_at'] ?? '').toString().compareTo((a['created_at'] ?? '').toString());
        });

        return ListView.builder(
          padding: EdgeInsets.symmetric(horizontal: 16 * safeSf), // Margem perfeitamente alinhada
          itemCount: data.length,
          itemBuilder: (context, index) {
            final team = Team.fromMap(data[index]);
            return GestureDetector(
              onTap: () => Navigator.push(context, MaterialPageRoute(builder: (context) => TeamStatsPage(team: team))),
              child: TeamCard(
                team: team, 
                controller: controller,
                onFavoriteTap: () => controller.toggleFavorite(team.id, team.isFavorite),
              ),
            );
          },
        );
      },
    );
  }

  void _showCreateDialog(BuildContext context) {
    showDialog(context: context, builder: (context) => CreateTeamDialog(onConfirm: (name, season, imageUrl) => controller.createTeam(name, season, imageUrl)));
  }
}

// --- TEAM CARD ---
class TeamCard extends StatelessWidget {
  final Team team;
  final TeamController controller;
  final VoidCallback onFavoriteTap;

  const TeamCard({super.key, required this.team, required this.controller, required this.onFavoriteTap});

  @override
  Widget build(BuildContext context) {
    final double safeSf = math.min(context.sf, 1.15); // O verdadeiro salvador do tablet

    return Card(
      color: Colors.white, elevation: 3, margin: EdgeInsets.only(bottom: 12 * safeSf),
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15 * safeSf)),
      child: ListTile(
        contentPadding: EdgeInsets.symmetric(horizontal: 16 * safeSf, vertical: 8 * safeSf),
        leading: Stack(
          clipBehavior: Clip.none,
          children: [
            CircleAvatar(
              radius: 28 * safeSf, backgroundColor: Colors.grey[200],
              backgroundImage: (team.imageUrl.isNotEmpty && team.imageUrl.startsWith('http')) ? NetworkImage(team.imageUrl) : null,
              child: (team.imageUrl.isEmpty || !team.imageUrl.startsWith('http')) ? Text(team.imageUrl.isEmpty ? "🏀" : team.imageUrl, style: TextStyle(fontSize: 24 * safeSf)) : null,
            ),
            Positioned(
              left: -15 * safeSf, top: -10 * safeSf,
              child: IconButton(
                icon: Icon(team.isFavorite ? Icons.star : Icons.star_border, color: team.isFavorite ? Colors.amber : Colors.black.withOpacity(0.1), size: 28 * safeSf, shadows: [Shadow(color: Colors.black.withOpacity(team.isFavorite ? 0.3 : 0.1), blurRadius: 4 * safeSf)]),
                onPressed: onFavoriteTap,
              ),
            ),
          ],
        ),
        title: Text(team.name, style: TextStyle(fontWeight: FontWeight.bold, fontSize: 16 * safeSf), overflow: TextOverflow.ellipsis),
        subtitle: Padding(
          padding: EdgeInsets.only(top: 6.0 * safeSf),
          child: Row(
            children: [
              Icon(Icons.groups_outlined, size: 16 * safeSf, color: Colors.grey),
              SizedBox(width: 4 * safeSf),
              StreamBuilder<int>(
                stream: controller.getPlayerCountStream(team.id),
                initialData: 0,
                builder: (context, snapshot) {
                  final count = snapshot.data ?? 0;
                  return Text("$count Jogs.", style: TextStyle(color: count > 0 ? Colors.green[700] : Colors.orange, fontWeight: FontWeight.bold, fontSize: 13 * safeSf));
                },
              ),
              SizedBox(width: 8 * safeSf),
              Expanded(child: Text("|  ${team.season}", style: TextStyle(color: Colors.grey, fontSize: 13 * safeSf), overflow: TextOverflow.ellipsis)),
            ],
          ),
        ),
        trailing: Row(
          mainAxisSize: MainAxisSize.min,
          children: [
            IconButton(tooltip: 'Ver Estatísticas', icon: Icon(Icons.bar_chart_rounded, color: Colors.blue, size: 24 * safeSf), onPressed: () => Navigator.push(context, MaterialPageRoute(builder: (context) => TeamStatsPage(team: team)))),
            IconButton(tooltip: 'Eliminar Equipa', icon: Icon(Icons.delete_outline, color: const Color(0xFFE74C3C), size: 24 * safeSf), onPressed: () => _confirmDelete(context, safeSf)),
          ],
        ),
      ),
    );
  }

  void _confirmDelete(BuildContext context, double safeSf) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: Text('Eliminar Equipa?', style: TextStyle(fontSize: 18 * safeSf, fontWeight: FontWeight.bold)),
        content: Text('Tens a certeza que queres eliminar "${team.name}"?', style: TextStyle(fontSize: 14 * safeSf)),
        actions: [
          TextButton(onPressed: () => Navigator.pop(context), child: Text('Cancelar', style: TextStyle(fontSize: 14 * safeSf))),
          TextButton(onPressed: () { controller.deleteTeam(team.id); Navigator.pop(context); }, child: Text('Eliminar', style: TextStyle(color: Colors.red, fontSize: 14 * safeSf))),
        ],
      ),
    );
  }
}

// --- DIALOG DE CRIAÇÃO ---
class CreateTeamDialog extends StatefulWidget {
  final Function(String name, String season, String imageUrl) onConfirm;
  const CreateTeamDialog({super.key, required this.onConfirm});

  @override
  State<CreateTeamDialog> createState() => _CreateTeamDialogState();
}

class _CreateTeamDialogState extends State<CreateTeamDialog> {
  final TextEditingController _nameController = TextEditingController();
  final TextEditingController _imageController = TextEditingController();
  String _selectedSeason = '2024/25';

  @override
  Widget build(BuildContext context) {
    final double safeSf = math.min(context.sf, 1.15); 
    
    return AlertDialog(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15 * safeSf)),
      title: Text('Nova Equipa', style: TextStyle(fontSize: 18 * safeSf, fontWeight: FontWeight.bold)),
      content: SingleChildScrollView(
        child: Container(
          constraints: BoxConstraints(maxWidth: 450 * safeSf), // O popup pode ter um travão para não cobrir a tela toda, fica mais bonito
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              TextField(controller: _nameController, style: TextStyle(fontSize: 14 * safeSf), decoration: InputDecoration(labelText: 'Nome da Equipa', labelStyle: TextStyle(fontSize: 14 * safeSf)), textCapitalization: TextCapitalization.words),
              SizedBox(height: 15 * safeSf),
              DropdownButtonFormField<String>(
                value: _selectedSeason, decoration: InputDecoration(labelText: 'Temporada', labelStyle: TextStyle(fontSize: 14 * safeSf)),
                style: TextStyle(fontSize: 14 * safeSf, color: Colors.black87),
                items: ['2023/24', '2024/25', '2025/26'].map((s) => DropdownMenuItem(value: s, child: Text(s))).toList(),
                onChanged: (val) => setState(() => _selectedSeason = val!),
              ),
              SizedBox(height: 15 * safeSf),
              TextField(controller: _imageController, style: TextStyle(fontSize: 14 * safeSf), decoration: InputDecoration(labelText: 'URL Imagem ou Emoji', labelStyle: TextStyle(fontSize: 14 * safeSf), hintText: 'Ex: 🏀 ou https://...', hintStyle: TextStyle(fontSize: 14 * safeSf))),
            ],
          ),
        ),
      ),
      actions: [
        TextButton(onPressed: () => Navigator.pop(context), child: Text('Cancelar', style: TextStyle(fontSize: 14 * safeSf))),
        ElevatedButton(
          style: ElevatedButton.styleFrom(backgroundColor: const Color(0xFFE74C3C), padding: EdgeInsets.symmetric(horizontal: 16 * safeSf, vertical: 10 * safeSf)),
          onPressed: () { if (_nameController.text.trim().isNotEmpty) { widget.onConfirm(_nameController.text.trim(), _selectedSeason, _imageController.text.trim()); Navigator.pop(context); } },
          child: Text('Criar', style: TextStyle(color: Colors.white, fontSize: 14 * safeSf)),
        ),
      ],
    );
  }
}