import 'package:flutter/material.dart';
import 'package:get_it/get_it.dart';
import 'package:superport/data/models/dashboard/equipment_status_distribution.dart';
import 'package:superport/data/models/dashboard/expiring_license.dart';
import 'package:superport/data/models/dashboard/overview_stats.dart';
import 'package:superport/data/models/dashboard/recent_activity.dart';
import 'package:superport/services/dashboard_service.dart';
import 'package:superport/screens/common/theme_tailwind.dart';

// 대시보드(Overview) 화면의 상태 및 비즈니스 로직을 담답하는 컨트롤러
class OverviewController extends ChangeNotifier {
  final DashboardService _dashboardService = GetIt.instance<DashboardService>();

  // 상태 데이터
  OverviewStats? _overviewStats;
  List<RecentActivity> _recentActivities = [];
  EquipmentStatusDistribution? _equipmentStatus;
  List<ExpiringLicense> _expiringLicenses = [];
  
  // 로딩 상태
  bool _isLoadingStats = false;
  bool _isLoadingActivities = false;
  bool _isLoadingEquipmentStatus = false;
  bool _isLoadingLicenses = false;
  
  // 에러 상태
  String? _statsError;
  String? _activitiesError;
  String? _equipmentStatusError;
  String? _licensesError;
  
  // Getters
  OverviewStats? get overviewStats => _overviewStats;
  List<RecentActivity> get recentActivities => _recentActivities;
  EquipmentStatusDistribution? get equipmentStatus => _equipmentStatus;
  List<ExpiringLicense> get expiringLicenses => _expiringLicenses;
  
  // 추가 getter
  int get totalCompanies => _overviewStats?.totalCompanies ?? 0;
  int get totalUsers => _overviewStats?.totalUsers ?? 0;
  
  bool get isLoading => _isLoadingStats || _isLoadingActivities || 
                         _isLoadingEquipmentStatus || _isLoadingLicenses;
  
  String? get error {
    return _statsError ?? _activitiesError ?? 
           _equipmentStatusError ?? _licensesError;
  }

  OverviewController();

  // 데이터 로드
  Future<void> loadData() async {
    await Future.wait([
      _loadOverviewStats(),
      _loadRecentActivities(),
      _loadEquipmentStatus(),
      _loadExpiringLicenses(),
    ]);
  }
  
  // 대시보드 데이터 로드 (loadData의 alias)
  Future<void> loadDashboardData() async {
    await loadData();
  }
  
  // 개별 데이터 로드 메서드
  Future<void> _loadOverviewStats() async {
    _isLoadingStats = true;
    _statsError = null;
    notifyListeners();
    
    final result = await _dashboardService.getOverviewStats();
    
    result.fold(
      (failure) {
        _statsError = failure.message;
      },
      (stats) {
        _overviewStats = stats;
      },
    );
    
    _isLoadingStats = false;
    notifyListeners();
  }

  Future<void> _loadRecentActivities() async {
    _isLoadingActivities = true;
    _activitiesError = null;
    notifyListeners();
    
    final result = await _dashboardService.getRecentActivities();
    
    result.fold(
      (failure) {
        _activitiesError = failure.message;
      },
      (activities) {
        _recentActivities = activities;
      },
    );
    
    _isLoadingActivities = false;
    notifyListeners();
  }
  
  Future<void> _loadEquipmentStatus() async {
    _isLoadingEquipmentStatus = true;
    _equipmentStatusError = null;
    notifyListeners();
    
    final result = await _dashboardService.getEquipmentStatusDistribution();
    
    result.fold(
      (failure) {
        _equipmentStatusError = failure.message;
      },
      (status) {
        _equipmentStatus = status;
      },
    );
    
    _isLoadingEquipmentStatus = false;
    notifyListeners();
  }
  
  Future<void> _loadExpiringLicenses() async {
    _isLoadingLicenses = true;
    _licensesError = null;
    notifyListeners();
    
    final result = await _dashboardService.getExpiringLicenses(days: 30);
    
    result.fold(
      (failure) {
        _licensesError = failure.message;
      },
      (licenses) {
        _expiringLicenses = licenses;
      },
    );
    
    _isLoadingLicenses = false;
    notifyListeners();
  }
  
  // 활동 타입별 아이콘과 색상 가져오기
  IconData getActivityIcon(String activityType) {
    switch (activityType.toLowerCase()) {
      case 'equipment_in':
      case '장비 입고':
        return Icons.input;
      case 'equipment_out':
      case '장비 출고':
        return Icons.output;
      case 'user_create':
      case '사용자 추가':
        return Icons.person_add;
      case 'license_create':
      case '라이선스 등록':
        return Icons.vpn_key;
      default:
        return Icons.notifications;
    }
  }
  
  Color getActivityColor(String activityType) {
    switch (activityType.toLowerCase()) {
      case 'equipment_in':
      case '장비 입고':
        return AppThemeTailwind.success;
      case 'equipment_out':
      case '장비 출고':
        return AppThemeTailwind.warning;
      case 'user_create':
      case '사용자 추가':
        return AppThemeTailwind.primary;
      case 'license_create':
      case '라이선스 등록':
        return AppThemeTailwind.info;
      default:
        return AppThemeTailwind.muted;
    }
  }
}