import 'package:get/get.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:intl/intl.dart';

class RiwayatBulananController extends GetxController {
  final FirebaseFirestore _firestore = FirebaseFirestore.instance;
  final FirebaseAuth _auth = FirebaseAuth.instance;

  var isLoading = false.obs;
  var monthlySummary = <Map<String, dynamic>>[].obs;

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

  /// 🔹 Ambil ringkasan resi per bulan
  Future<void> fetchMonthlySummary() async {
    try {
      isLoading.value = true;
      monthlySummary.clear();

      final user = _auth.currentUser;
      if (user == null) return;
      final userId = user.uid;

      final snapshot = await _firestore
          .collection('resis')
          .where('store_id', isEqualTo: userId)
          .get();

      // 🔸 Kelompokkan data berdasarkan bulan & tahun
      Map<String, Map<String, dynamic>> grouped = {};

      for (var doc in snapshot.docs) {
        final data = doc.data();
        if (data['created_at'] == null) continue;

        final createdAt = (data['created_at'] as Timestamp).toDate();
        final monthKey = DateFormat('MMMM yyyy', 'id_ID').format(createdAt);

        final pembayaran = (data['pembayaran'] ?? '').toString().toUpperCase();
        final total = double.tryParse(data['total'].toString()) ?? 0;

        if (!grouped.containsKey(monthKey)) {
          grouped[monthKey] = {
            'month': monthKey,
            'rawDate': createdAt,
            'total': 0,
            'cod': 0,
            'nonCod': 0,
            'incomeCod': 0.0,
            'incomeNonCod': 0.0,
          };
        }

        grouped[monthKey]!['total'] += 1;
        if (pembayaran == 'COD') {
          grouped[monthKey]!['cod'] += 1;
          grouped[monthKey]!['incomeCod'] += total;
        } else {
          grouped[monthKey]!['nonCod'] += 1;
          grouped[monthKey]!['incomeNonCod'] += total;
        }
      }

      // 🔸 Konversi ke List dan urutkan dari bulan terbaru
      final sorted = grouped.values.toList()
        ..sort((a, b) => b['rawDate'].compareTo(a['rawDate']));

      monthlySummary.assignAll(sorted);
    } catch (e) {
      print('Error fetchMonthlySummary: $e');
      Get.snackbar('Error', 'Gagal mengambil data: $e');
      monthlySummary.clear();
    } finally {
      isLoading.value = false;
    }
  }

  /// 🔹 Ambil pendapatan per bulan (COD & Non COD)
  Future<Map<String, dynamic>> getPendapatanBulanan(String monthLabel) async {
    try {
      final user = _auth.currentUser;
      if (user == null) return {};

      final parsedMonth = DateFormat('MMMM yyyy', 'id_ID').parse(monthLabel);
      final start = DateTime(parsedMonth.year, parsedMonth.month, 1);
      final end =
          DateTime(parsedMonth.year, parsedMonth.month + 1, 0, 23, 59, 59);

      final snapshot = await _firestore
          .collection('resis')
          .where('store_id', isEqualTo: user.uid)
          .where('created_at', isGreaterThanOrEqualTo: start)
          .where('created_at', isLessThanOrEqualTo: end)
          .get();

      double codIncome = 0;
      double nonCodIncome = 0;

      for (var doc in snapshot.docs) {
        final data = doc.data();
        final pembayaran = (data['pembayaran'] ?? '').toString().toUpperCase();
        final total = double.tryParse(data['total'].toString()) ?? 0;

        if (pembayaran == 'COD') {
          codIncome += total;
        } else {
          nonCodIncome += total;
        }
      }

      return {
        'cod': codIncome,
        'nonCod': nonCodIncome,
      };
    } catch (e) {
      print('Error getPendapatanBulanan: $e');
      return {};
    }
  }

  /// 🔹 Ambil semua resi di bulan tertentu
  Future<List<Map<String, dynamic>>> fetchResiByMonth(String monthLabel) async {
    try {
      final user = _auth.currentUser;
      if (user == null) return [];

      final parsedMonth = DateFormat('MMMM yyyy', 'id_ID').parse(monthLabel);
      final start = DateTime(parsedMonth.year, parsedMonth.month, 1);
      final end =
          DateTime(parsedMonth.year, parsedMonth.month + 1, 0, 23, 59, 59);

      final snapshot = await _firestore
          .collection('resis')
          .where('store_id', isEqualTo: user.uid)
          .where('created_at', isGreaterThanOrEqualTo: start)
          .where('created_at', isLessThanOrEqualTo: end)
          .orderBy('created_at', descending: true)
          .get();

      return snapshot.docs.map((doc) {
        final data = doc.data();
        return {
          'resi_id': doc.id,
          'penerima': data['penerima'] ?? '-',
          'barang': data['barang'] ?? '-',
          'alamat': data['alamat'] ?? '-',
          'pembayaran': data['pembayaran'] ?? '-',
          'no_wa': data['no_wa'] ?? '-',
          'total': data['total'] ?? 0,
          'created_at': data['created_at'],
        };
      }).toList();
    } catch (e) {
      print('Error fetchResiByMonth: $e');
      return [];
    }
  }
}