import 'package:dio/dio.dart';
import '../core/api/api_client.dart';
import '../core/exceptions.dart';
import '../core/models/page_result.dart';
import '../models/inventory.dart';

class InventoryRepository {
  final ApiClient _client;

  const InventoryRepository(this._client);

  Future<PageResult<Inventory>> listInventory({
    int? warehouseId,
    int? productId,
    String? keyword,
    String? code,
    List<String>? series,
    List<String>? spec,
    String? status, // 三态筛选：stock/on_sale/sold（逗号可多值）；空=后端默认（排除已售）
    String? sortBy, // 列头排序：qty/cost/price/prod_date/in_time（后端白名单）
    bool sortAsc = true,
    int page = 1,
    int pageSize = 50,
  }) async {
    try {
      final params = <String, dynamic>{
        'page': page,
        'page_size': pageSize,
        if (warehouseId != null) 'warehouse_id': warehouseId,
        if (productId != null) 'product_id': productId,
        if (keyword != null && keyword.isNotEmpty) 'keyword': keyword,
        if (code != null && code.isNotEmpty) 'code': code,
        if (series != null && series.isNotEmpty) 'series': series.join(','),
        if (spec != null && spec.isNotEmpty) 'spec': spec.join(','),
        if (status != null && status.isNotEmpty) 'status': status,
        if (sortBy != null && sortBy.isNotEmpty) ...{
          'sort_by': sortBy,
          'sort_dir': sortAsc ? 'asc' : 'desc',
        },
      };
      final resp = await _client.get('/inventory', params: params);
      return PageResult.fromJson(
        resp.data as Map<String, dynamic>,
        Inventory.fromJson,
      );
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '获取库存失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<InventorySummary> getSummary() async {
    try {
      final resp = await _client.get('/inventory/summary');
      return InventorySummary.fromJson(resp.data as Map<String, dynamic>);
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '获取库存汇总失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<Map<String, dynamic>> createCheck(Map<String, dynamic> data) async {
    try {
      final resp = await _client.post('/inventory/checks', data: data);
      return resp.data as Map<String, dynamic>;
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '提交盘点失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 库存⇄在售 挂售切换（status 仅收 stock/on_sale；sold 由出库流程专属）
  Future<void> updateStatus(int id, String status) async {
    try {
      await _client.put('/inventory/$id/status', data: {'status': status});
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '状态更新失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<void> updateRemark(int id, String remark) async {
    try {
      await _client.put('/inventory/$id/remark', data: {'remark': remark});
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '更新备注失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<PageResult<InventoryLog>> listLogs({
    int? warehouseId,
    int? productId,
    int page = 1,
    int pageSize = 50,
  }) async {
    try {
      final params = <String, dynamic>{
        'page': page,
        'page_size': pageSize,
        if (warehouseId != null) 'warehouse_id': warehouseId,
        if (productId != null) 'product_id': productId,
      };
      final resp = await _client.get('/inventory/logs', params: params);
      return PageResult.fromJson(
        resp.data as Map<String, dynamic>,
        InventoryLog.fromJson,
      );
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '获取流水失败',
        statusCode: e.response?.statusCode,
      );
    }
  }
}