import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:siro_driver/constant/box_name.dart';
import 'package:siro_driver/constant/links.dart';
import 'package:siro_driver/controller/functions/crud.dart';
import 'package:siro_driver/models/model/driver/rides_summary_model.dart';
import '../../../main.dart';

class StatisticsController extends GetxController {
  bool isLoading = false;

  // ═══ Weekly Data ═══
  List<DayStat> weeklyStats = [];
  double weeklyEarnings = 0;
  int weeklyTrips = 0;
  double weeklyHours = 0;

  // ═══ Monthly Data ═══
  List<MonthlyPriceDriverModel> monthlyEarnings = [];
  List<MonthlyRideModel> monthlyRides = [];
  List<MonthlyDataModel> monthlyDuration = [];
  double monthlyTotalEarnings = 0;
  int monthlyTotalTrips = 0;
  double monthlyTotalHours = 0;
  String bestDay = '--';
  double bestDayEarnings = 0;

  // ═══ Tab State ═══
  int selectedTab = 0; // 0=weekly, 1=monthly

  @override
  void onInit() {
    super.onInit();
    reloadData();
  }

  void changeTab(int tab) {
    selectedTab = tab;
    update();
  }

  // ═══════ جلب البيانات الأسبوعية ═══════
  Future<void> fetchWeeklyData() async {
    isLoading = true;
    update();

    try {
      var res = await CRUD().get(
        link: AppLink.getWeeklyAggregate,
        payload: {
          'driver_id': box.read(BoxName.driverID).toString(),
        },
      );

      if (res != null && res != 'failure') {
        box.write('stats_weekly_cache', res);
        var data = jsonDecode(res);
        if (data['message'] is List) {
          weeklyStats = (data['message'] as List)
              .map((e) => DayStat.fromJson(e))
              .toList();
          weeklyEarnings = weeklyStats.fold(0, (s, d) => s + d.earnings);
          weeklyTrips = weeklyStats.fold(0, (s, d) => s + d.trips);
          weeklyHours = weeklyStats.fold(0, (s, d) => s + d.hours);
        }
      }
    } catch (e) {
      debugPrint('❌ [Stats] Weekly fetch error: $e');
      // Fallback: generate from local data
      _generateLocalWeeklyData();
    }

    isLoading = false;
    update();
  }

  // ═══════ جلب البيانات الشهرية ═══════
  Future<void> fetchMonthlyData() async {
    try {
      // 1. أرباح شهرية
      var earningsRes = await CRUD().getWallet(
        link: AppLink.getAllPaymentFromRide,
        payload: {'driverID': box.read(BoxName.driverID).toString()},
      );
      if (earningsRes != null && earningsRes != 'failure') {
        box.write('stats_monthly_earnings_cache', earningsRes);
        var data = jsonDecode(earningsRes);
        if (data['message'] is List) {
          monthlyEarnings = (data['message'] as List)
              .map((e) => MonthlyPriceDriverModel.fromJson(e))
              .toList();
          monthlyTotalEarnings =
              monthlyEarnings.fold(0, (s, d) => s + d.pricePerDay);

          // أفضل يوم
          if (monthlyEarnings.isNotEmpty) {
            var best = monthlyEarnings
                .reduce((a, b) => a.pricePerDay > b.pricePerDay ? a : b);
            bestDay = best.day.toString();
            bestDayEarnings = best.pricePerDay;
          }
        }
      }

      // 2. رحلات شهرية
      var ridesRes = await CRUD().get(
        link: AppLink.getRidesDriverByDay,
        payload: {'driver_id': box.read(BoxName.driverID).toString()},
      );
      if (ridesRes != null && ridesRes != 'failure') {
        box.write('stats_monthly_rides_cache', ridesRes);
        var data = jsonDecode(ridesRes);
        if (data['message'] is List) {
          monthlyRides = (data['message'] as List)
              .map((e) => MonthlyRideModel.fromJson(e))
              .toList();
          monthlyTotalTrips = monthlyRides.fold(0, (s, d) => s + d.countRide);
        }
      }

      // 3. ساعات شهرية
      var durationRes = await CRUD().get(
        link: AppLink.getTotalDriverDuration,
        payload: {'driver_id': box.read(BoxName.driverID).toString()},
      );
      if (durationRes != null && durationRes != 'failure') {
        box.write('stats_monthly_duration_cache', durationRes);
        var data = jsonDecode(durationRes);
        if (data['message'] is List) {
          monthlyDuration = (data['message'] as List)
              .map((e) => MonthlyDataModel.fromJson(e))
              .toList();
          monthlyTotalHours =
              monthlyDuration.fold(0, (s, d) => s + d.totalDuration.toDouble());
        }
      }
    } catch (e) {
      debugPrint('❌ [Stats] Monthly fetch error: $e');
    }

    update();
  }

  void _generateLocalWeeklyData() {
    // Fallback بيانات محلية عند عدم توفر الـ API
    final now = DateTime.now();
    weeklyStats = List.generate(7, (i) {
      final day = now.subtract(Duration(days: 6 - i));
      return DayStat(
        date: day,
        dayName: _getDayName(day.weekday),
        earnings: 0,
        trips: 0,
        hours: 0,
      );
    });
  }

  String _getDayName(int weekday) {
    const days = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];
    return days[weekday - 1];
  }

  bool _isFetching = false;

  Future<void> reloadData({bool force = false}) async {
    if (_isFetching) return;
    _isFetching = true;

    // التحقق من التخزين المؤقت (3 ساعات)
    String? lastFetchStr = box.read('stats_last_fetch');
    if (!force && lastFetchStr != null) {
      try {
        DateTime lastFetch = DateTime.parse(lastFetchStr);
        if (DateTime.now().difference(lastFetch).inHours < 3) {
          debugPrint('ℹ️ [Statistics] Loading cached statistics (last fetch: $lastFetchStr)');
          
          // تحميل الكاش الأسبوعي
          String? weeklyCache = box.read('stats_weekly_cache');
          if (weeklyCache != null) {
            var data = jsonDecode(weeklyCache);
            if (data['message'] is List) {
              weeklyStats = (data['message'] as List)
                  .map((e) => DayStat.fromJson(e))
                  .toList();
              weeklyEarnings = weeklyStats.fold(0, (s, d) => s + d.earnings);
              weeklyTrips = weeklyStats.fold(0, (s, d) => s + d.trips);
              weeklyHours = weeklyStats.fold(0, (s, d) => s + d.hours);
            }
          }

          // تحميل الكاش الشهري (الأرباح)
          String? earningsCache = box.read('stats_monthly_earnings_cache');
          if (earningsCache != null) {
            var data = jsonDecode(earningsCache);
            if (data['message'] is List) {
              monthlyEarnings = (data['message'] as List)
                  .map((e) => MonthlyPriceDriverModel.fromJson(e))
                  .toList();
              monthlyTotalEarnings =
                  monthlyEarnings.fold(0, (s, d) => s + d.pricePerDay);
              if (monthlyEarnings.isNotEmpty) {
                var best = monthlyEarnings
                    .reduce((a, b) => a.pricePerDay > b.pricePerDay ? a : b);
                bestDay = best.day.toString();
                bestDayEarnings = best.pricePerDay;
              }
            }
          }

          // تحميل الكاش الشهري (الرحلات)
          String? ridesCache = box.read('stats_monthly_rides_cache');
          if (ridesCache != null) {
            var data = jsonDecode(ridesCache);
            if (data['message'] is List) {
              monthlyRides = (data['message'] as List)
                  .map((e) => MonthlyRideModel.fromJson(e))
                  .toList();
              monthlyTotalTrips = monthlyRides.fold(0, (s, d) => s + d.countRide);
            }
          }

          // تحميل الكاش الشهري (المدد)
          String? durationCache = box.read('stats_monthly_duration_cache');
          if (durationCache != null) {
            var data = jsonDecode(durationCache);
            if (data['message'] is List) {
              monthlyDuration = (data['message'] as List)
                  .map((e) => MonthlyDataModel.fromJson(e))
                  .toList();
              monthlyTotalHours =
                  monthlyDuration.fold(0, (s, d) => s + d.totalDuration.toDouble());
            }
          }

          _isFetching = false;
          update();
          return;
        }
      } catch (e) {
        debugPrint('⚠️ [Statistics] Failed to load cached statistics: $e');
      }
    }

    isLoading = true;
    update();

    try {
      debugPrint('📊 [Statistics] Reloading data from server...');
      await fetchWeeklyData();
      await fetchMonthlyData();
      box.write('stats_last_fetch', DateTime.now().toIso8601String());
      debugPrint('📊 [Statistics] Data reload complete.');
    } catch (e) {
      debugPrint('❌ [Statistics] Error reloading data: $e');
    } finally {
      _isFetching = false;
      isLoading = false;
      update();
    }
  }
}

// ═══════ نموذج إحصائية اليوم ═══════
class DayStat {
  final DateTime date;
  final String dayName;
  final double earnings;
  final int trips;
  final double hours;

  DayStat({
    required this.date,
    required this.dayName,
    required this.earnings,
    required this.trips,
    required this.hours,
  });

  factory DayStat.fromJson(Map<String, dynamic> json) {
    final date =
        DateTime.tryParse(json['day']?.toString() ?? '') ?? DateTime.now();
    const dayNames = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];
    return DayStat(
      date: date,
      dayName: dayNames[date.weekday - 1],
      earnings: double.tryParse(json['earnings']?.toString() ?? '0') ?? 0,
      trips: int.tryParse(json['trips']?.toString() ?? '0') ?? 0,
      hours: double.tryParse(json['hours']?.toString() ?? '0') ?? 0,
    );
  }
}