import 'package:flutter/material.dart';
import 'package:youmazgestion/Components/app_bar.dart';
import 'package:youmazgestion/Services/app_database.dart';
import 'package:youmazgestion/Models/role.dart';

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

  @override
  State<HandleUserRole> createState() => _HandleUserRoleState();
}

class _HandleUserRoleState extends State<HandleUserRole> {
  final db = AppDatabase.instance;

  List<Map<String, dynamic>> roles = [];
  Map<String, bool> permissionsMap = {};

  int? selectedRoleId;
  final TextEditingController _roleController = TextEditingController();

  @override
  void initState() {
    super.initState();
    _initData();
  }

  Future<void> _initData() async {
    final roleList = await db.database.then((db) => db.query('roles'));
    final perms = await db.getAllPermissions();

    setState(() {
      roles = roleList;
      for (var perm in perms) {
        permissionsMap[perm.name] = false;
      }
    });
  }

  Future<void> _addRole() async {
    String designation = _roleController.text.trim();
    if (designation.isEmpty) return;

    await db.createRole(Role(designation: designation));
    _roleController.clear();
    await _initData();
  }

  Future<void> _loadRolePermissions(int roleId) async {
    final rolePerms = await db.getPermissionsForRole(roleId);
    final allPerms = await db.getAllPermissions();

    setState(() {
      selectedRoleId = roleId;
      permissionsMap = {
        for (var perm in allPerms)
          perm.name: rolePerms.any((rp) => rp.name == perm.name)
      };
    });
  }

  Future<void> _onPermissionToggle(String permission, bool enabled) async {
    if (selectedRoleId == null) return;

    final allPerms = await db.getAllPermissions();
    final perm = allPerms.firstWhere((p) => p.name == permission);

    if (enabled) {
      await db.assignPermission(selectedRoleId!, perm.id!);
    } else {
      await db.removePermission(selectedRoleId!, perm.id!);
    }

    setState(() {
      permissionsMap[permission] = enabled;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const CustomAppBar(title: "Gestion des rôles"),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            // ✅ Champ pour saisir un nouveau rôle
            Row(
              children: [
                Expanded(
                  child: TextField(
                    controller: _roleController,
                    decoration: const InputDecoration(
                      labelText: 'Nouveau rôle',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
                const SizedBox(width: 10),
                ElevatedButton(
                  onPressed: _addRole,
                  child: const Text('Créer'),
                ),
              ],
            ),

            const SizedBox(height: 20),

            // 🔽 Sélection d'un rôle
            DropdownButton<int>(
              isExpanded: true,
              hint: const Text("Choisir un rôle"),
              value: selectedRoleId,
              items: roles.map((role) {
                return DropdownMenuItem<int>(
                  value: role['id'] as int,
                  child: Text(role['designation'] ?? ''),
                );
              }).toList(),
              onChanged: (value) {
                if (value != null) _loadRolePermissions(value);
              },
            ),

            const SizedBox(height: 16),

            // ✅ Permissions associées
            if (selectedRoleId != null)
              Expanded(
                child: ListView(
                  children: permissionsMap.entries.map((entry) {
                    return CheckboxListTile(
                      title: Text(entry.key),
                      value: entry.value,
                      onChanged: (bool? value) {
                        _onPermissionToggle(entry.key, value ?? false);
                      },
                    );
                  }).toList(),
                ),
              ),
          ],
        ),
      ),
    );
  }
}