import 'dart:developer';

import 'package:data_channel/data_channel.dart';
import 'package:injectable/injectable.dart';

import '../../../common/api/api_client.dart';
import '../../../common/api/api_failure.dart';
import '../../../common/extension/extension.dart';
import '../../../common/function/app_function.dart';
import '../../../common/url/api_path.dart';
import '../../../domain/order/order.dart';
import '../order_dtos.dart';

@injectable
class OrderRemoteDataProvider {
  final ApiClient _apiClient;
  final String _logName = 'OrderRemoteDataProvider';

  OrderRemoteDataProvider(this._apiClient);

  Future<DC<OrderFailure, List<OrderDto>>> fetch({
    int page = 1,
    int limit = 10,
    String? status,
    String? search,
    String? outletId,
    required DateTime dateFrom,
    required DateTime dateTo,
  }) async {
    try {
      Map<String, dynamic> params = {
        'page': page,
        'limit': limit,
        'date_from': dateFrom.toServerDate,
        'date_to': dateTo.toServerDate,
      };

      if (status != null && status.isNotEmpty) {
        params['status'] = status;
      }

      if (search != null && search.isNotEmpty) {
        params['search'] = search;
      }

      if (outletId != null) {
        params['outlet_id'] = outletId;
      }

      final response = await _apiClient.get(
        ApiPath.order,
        params: params,
        headers: getAuthorizationHeader(),
      );

      if (response.data['data'] == null) {
        return DC.error(OrderFailure.empty());
      }

      final dto = (response.data['data']['orders'] as List)
          .map((item) => OrderDto.fromJson(item))
          .toList();

      return DC.data(dto);
    } on ApiFailure catch (e, s) {
      log('fetchOrderError', name: _logName, error: e, stackTrace: s);
      return DC.error(OrderFailure.serverError(e));
    }
  }

  /// Backend belum punya endpoint ringkasan order, jadi jumlahnya diambil
  /// dari `total_count` list order, dan nominalnya dijumlahkan dari
  /// `total_amount` tiap order (diambil per halaman sampai habis).
  Future<DC<OrderFailure, OrderTotal>> fetchTotal({
    String? status,
    String? outletId,
    required DateTime dateFrom,
    required DateTime dateTo,
  }) async {
    const limit = 100;

    try {
      Map<String, dynamic> params = {
        'limit': limit,
        'date_from': dateFrom.toServerDate,
        'date_to': dateTo.toServerDate,
      };

      if (status != null && status.isNotEmpty) {
        params['status'] = status;
      }

      if (outletId != null) {
        params['outlet_id'] = outletId;
      }

      int page = 1;
      int count = 0;
      int fetched = 0;
      int amount = 0;

      while (true) {
        final response = await _apiClient.get(
          ApiPath.order,
          params: {...params, 'page': page},
          headers: getAuthorizationHeader(),
        );

        if (response.data['data'] == null) {
          if (page == 1) return DC.error(OrderFailure.empty());
          break;
        }

        final data = response.data['data'];
        count = (data['total_count'] as num? ?? 0).toInt();

        final orders = (data['orders'] as List? ?? [])
            .map((item) => OrderDto.fromJson(item))
            .toList();

        for (final order in orders) {
          amount += order.totalAmount ?? 0;
        }
        fetched += orders.length;

        if (orders.isEmpty || fetched >= count) break;
        page++;
      }

      return DC.data(OrderTotal(count: count, amount: amount));
    } on ApiFailure catch (e, s) {
      log('fetchOrderTotalError', name: _logName, error: e, stackTrace: s);
      return DC.error(OrderFailure.serverError(e));
    }
  }
}