import 'dart:convert';

import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../core/data/api_cache.dart';
import '../../core/navigation/host_app_channel.dart';
import '../../core/network/api_client.dart';
import '../../shared/models/pagination_model.dart';
import '../../app.dart';
import '../expense_apply/expense_apply_api.dart';

export '../expense_apply/expense_apply_api.dart'
    show DepartmentItem, EmployeeItem;
import 'vehicle_apply_model.dart';

final vehicleApplyApiProvider = Provider<VehicleApplyApi>(
  (ref) => VehicleApplyApi(ref.read(apiClientProvider)),
);

class VehicleApplyApi {
  final ApiClient _client;
  final _cache = ApiCache(
    keyPrefix:
        '${HostAppChannel.sn}_${HostAppChannel.compNo}_${HostAppChannel.usr}',
  );
  VehicleApplyApi(this._client);

  /// 清除所有基础资料缓存（picker 下拉刷新时调用）。
  void clearRefCache() => _cache.clear();

  /// 用车申请列表（分页）
  Future<PaginatedData<VehicleApplyModel>> fetchList({
    String status = '',
    String keyword = '',
    String startDate = '',
    String endDate = '',
    String usr = '',
    String sortDir = 'DESC',
    int page = 1,
    int size = 20,
  }) async {
    final response = await _client.get<Map<String, dynamic>>(
      '/OA/GetVehicleApplyList',
      queryParameters: {
        'status': status,
        'keyword': keyword,
        'startDate': startDate,
        'endDate': endDate,
        'usr': usr,
        'sortDir': sortDir,
        'page': page,
        'size': size,
      },
    );
    return PaginatedData.fromJson(response.data!, VehicleApplyModel.fromJson);
  }

  /// 用车申请详情
  Future<VehicleApplyModel> fetchDetail(String billNo) async {
    final response = await _client.get<Map<String, dynamic>>(
      '/OA/GetVehicleApplyDetail',
      queryParameters: {'billNo': billNo},
    );
    return VehicleApplyModel.fromJson(response.data!);
  }

  /// 提交/保存，返回申请单号
  Future<String?> submit(Map<String, dynamic> data) async {
    final response = await _client.post<Map<String, dynamic>>(
      '/OA/BillSave',
      data: {
        'erpCategory': 'MasterService',
        'billId': 'YC',
        'procId': '',
        'data': data,
      },
    );
    final resData = response.data;
    if (resData == null) return null;

    final resultData = resData['resultData'];
    if (resultData is Map<String, dynamic>) {
      final bilNo = resultData['BIL_NO'] as String?;
      if (bilNo != null && bilNo.isNotEmpty) return bilNo;
    }
    if (resultData is String && resultData.isNotEmpty) {
      try {
        final parsed = json.decode(resultData) as Map<String, dynamic>;
        final bilNo = parsed['BIL_NO'] as String?;
        if (bilNo != null && bilNo.isNotEmpty) return bilNo;
      } catch (_) {}
    }
    final rootBilNo = resData['BIL_NO'] as String?;
    if (rootBilNo != null && rootBilNo.isNotEmpty) return rootBilNo;

    return null;
  }

  /// 还车登记（billId="YC"，IS_RETURN="T"）
  Future<String?> submitReturn(
    String billNo,
    Map<String, dynamic> returnData,
  ) async {
    final response = await _client.post<Map<String, dynamic>>(
      '/OA/BillSave',
      data: {
        'erpCategory': 'MasterService',
        'billId': 'YC',
        'procId': '',
        'data': {
          'HeadData': {
            'YC_NO': billNo,
            'IS_RETURN': 'T',
            'RETURN_TIME': returnData['returnTime'],
            'ODOMETER_END': returnData['odometerEnd'],
            'AMTN': returnData['amtn'],
            'REMARK': returnData['remark'],
            'USR_CHECK': returnData['usrCheck'],
          },
        },
      },
    );
    final resData = response.data;
    if (resData == null) return null;

    final resultData = resData['resultData'];
    if (resultData is Map<String, dynamic>) {
      final bilNo = resultData['BIL_NO'] as String?;
      if (bilNo != null && bilNo.isNotEmpty) return bilNo;
    }
    if (resultData is String && resultData.isNotEmpty) {
      try {
        final parsed = json.decode(resultData) as Map<String, dynamic>;
        final bilNo = parsed['BIL_NO'] as String?;
        if (bilNo != null && bilNo.isNotEmpty) return bilNo;
      } catch (_) {}
    }
    return null;
  }

  /// 提交审核流
  Future<bool> shSubmit({
    required String bilId,
    required String bilNo,
    required String bilDd,
    String dep = '',
    String rem = '',
    String usr = '',
  }) async {
    try {
      final response = await _client.post<Map<String, dynamic>>(
        '/OA/SHSubmit',
        data: {
          'erpCategory': 'MasterService',
          'bilId': bilId,
          'bilNo': bilNo,
          'bilDd': bilDd,
          'dep': dep,
          'rem': rem,
          'usr': usr,
        },
      );
      return response.data?['code'] == 0;
    } catch (_) {
      return false;
    }
  }

  /// 获取单据状态（billId="YC"）
  Future<Map<String, dynamic>> getBillStatus(String billNo) async {
    final response = await _client.get<Map<String, dynamic>>(
      '/OA/GetBillStatus',
      queryParameters: {'billId': 'YC', 'billNo': billNo},
    );
    return response.data!;
  }

  /// 部门查询
  Future<List<DepartmentItem>> getDepartments({
    String keyword = '',
    bool onlyActive = true,
    int page = 1,
    int size = 100,
  }) async {
    final cacheKey = 'getDepartments_${keyword}_${onlyActive}_$page';
    return _cache.getOrFetch(cacheKey, () async {
      final response = await _client.get<Map<String, dynamic>>(
        '/OA/GetDepartments',
        queryParameters: {
          'keyword': keyword,
          'onlyActive': onlyActive,
          'page': page,
          'size': size,
        },
      );
      final list = (response.data?['list'] as List<dynamic>?) ?? [];
      return list
          .map((e) => DepartmentItem.fromJson(e as Map<String, dynamic>))
          .toList();
    });
  }

  /// 员工查询
  Future<List<EmployeeItem>> getEmployees({
    String keyword = '',
    String salNo = '',
    int page = 1,
    int size = 100,
  }) async {
    final cacheKey = 'getEmployees_${keyword}_${salNo}_$page';
    return _cache.getOrFetch(cacheKey, () async {
      final response = await _client.get<Map<String, dynamic>>(
        '/OA/GetEmployees',
        queryParameters: {
          'keyword': keyword,
          'salNo': salNo,
          'page': page,
          'size': size,
        },
      );
      final list = (response.data?['list'] as List<dynamic>?) ?? [];
      return list
          .map((e) => EmployeeItem.fromJson(e as Map<String, dynamic>))
          .toList();
    });
  }
}