import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import '../models/person_model.dart';

class StatsController {
  final FirebaseFirestore _db = FirebaseFirestore.instance;

  // --- LÓGICA DE FIREBASE ---

  // GRAVAR: Cria o personagem numa sub-coleção dentro da equipa
  Future<void> addPerson(String teamId, String name, String type, String number) async {
    await _db.collection('teams').doc(teamId).collection('members').add({
      'name': name,
      'type': type,
      'number': number,
      'createdAt': FieldValue.serverTimestamp(),
    });
  }

  // LER: Vai buscar todos os membros da equipa em tempo real
  Stream<List<Person>> getMembers(String teamId) {
    return _db
        .collection('teams')
        .doc(teamId)
        .collection('members')
        .orderBy('createdAt', descending: false) // Organiza por ordem de criação
        .snapshots()
        .map((snapshot) => snapshot.docs
            .map((doc) => Person.fromFirestore(doc.data(), doc.id))
            .toList());
  }

  // --- LÓGICA DE INTERFACE (POPUP) ---

  void showAddPersonDialog(BuildContext context, String teamId) {
    String selectedType = 'Jogador';
    final TextEditingController nameController = TextEditingController();
    final TextEditingController numberController = TextEditingController();

    showDialog(
      context: context,
      builder: (context) {
        return StatefulBuilder(
          builder: (context, setPopupState) {
            return AlertDialog(
              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15)),
              title: const Text('Novo Personagem'),
              content: SingleChildScrollView(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    // Seletor: Jogador ou Treinador
                    DropdownButtonFormField<String>(
                      value: selectedType,
                      decoration: const InputDecoration(labelText: 'Tipo'),
                      items: ['Jogador', 'Treinador']
                          .map((t) => DropdownMenuItem(value: t, child: Text(t)))
                          .toList(),
                      onChanged: (val) {
                        setPopupState(() {
                          selectedType = val!;
                        });
                      },
                    ),
                    const SizedBox(height: 15),
                    // Campo Nome
                    TextField(
                      controller: nameController,
                      textCapitalization: TextCapitalization.words,
                      decoration: const InputDecoration(
                        labelText: 'Nome Completo',
                        hintText: 'Ex: Stephen Curry',
                      ),
                    ),
                    // Campo Número (Aparece apenas se for Jogador)
                    if (selectedType == 'Jogador') ...[
                      const SizedBox(height: 15),
                      TextField(
                        controller: numberController,
                        keyboardType: TextInputType.number,
                        decoration: const InputDecoration(
                          labelText: 'Número da Camisola',
                          hintText: 'Ex: 30',
                        ),
                      ),
                    ],
                  ],
                ),
              ),
              actions: [
                TextButton(
                  onPressed: () => Navigator.pop(context),
                  child: const Text('Cancelar'),
                ),
                ElevatedButton(
                  style: ElevatedButton.styleFrom(
                    backgroundColor: const Color(0xFF00C853),
                  ),
                  onPressed: () async {
                    if (nameController.text.isNotEmpty) {
                      // CHAMA A FUNÇÃO DE GRAVAR DO FIREBASE
                      await addPerson(
                        teamId,
                        nameController.text,
                        selectedType,
                        selectedType == 'Jogador' ? numberController.text : '',
                      );
                      
                      if (context.mounted) Navigator.pop(context);
                    }
                  },
                  child: const Text('Guardar', style: TextStyle(color: Colors.white)),
                ),
              ],
            );
          },
        );
      },
    );
  }
}