import 'dart:typed_data';
import 'package:dio/dio.dart';
import '../core/api/api_client.dart';
import '../core/exceptions.dart';
import '../core/models/page_result.dart';
import '../models/product.dart';
import '../models/product_image.dart';

class ProductRepository {
  final ApiClient _client;

  const ProductRepository(this._client);

  Future<PageResult<Product>> list({
    int page = 1,
    int pageSize = 20,
    String? keyword,
    int? categoryId,
  }) async {
    try {
      final params = <String, dynamic>{
        'page': page,
        'page_size': pageSize,
        if (keyword != null && keyword.isNotEmpty) 'keyword': keyword,
        if (categoryId != null) 'category_id': categoryId,
      };
      final resp = await _client.get('/products', params: params);
      return PageResult.fromJson(
        resp.data as Map<String, dynamic>,
        Product.fromJson,
      );
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '获取商品列表失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<Product> create(Map<String, dynamic> data) async {
    try {
      final resp = await _client.post('/products', data: data);
      return Product.fromJson(
          (resp.data as Map<String, dynamic>)['data'] as Map<String, dynamic>);
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '创建商品失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<Product> update(int id, Map<String, dynamic> data) async {
    try {
      final resp = await _client.put('/products/$id', data: data);
      return Product.fromJson(
          (resp.data as Map<String, dynamic>)['data'] as Map<String, dynamic>);
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '更新商品失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<void> delete(int id) async {
    try {
      await _client.delete('/products/$id');
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '删除商品失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<Product> getDetail(int id) async {
    try {
      final resp = await _client.get('/products/$id/detail');
      return Product.fromJson(
          (resp.data as Map<String, dynamic>)['data'] as Map<String, dynamic>);
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '获取商品详情失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<ProductImage> uploadImage(int productId, String? filePath,
      {Uint8List? bytes, String? fileName}) async {
    try {
      final MultipartFile file;
      if (bytes != null) {
        file = MultipartFile.fromBytes(bytes, filename: fileName ?? 'image.jpg');
      } else {
        file = await MultipartFile.fromFile(filePath!);
      }
      final formData = FormData.fromMap({'file': file});
      final resp = await _client.post('/products/$productId/images', data: formData);
      return ProductImage.fromJson(
          (resp.data as Map<String, dynamic>)['data'] as Map<String, dynamic>);
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '上传图片失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<Uint8List> getQRCodeBytes(int productId) async {
    try {
      final bytes = await _client.getBytes('/products/$productId/qrcode');
      return Uint8List.fromList(bytes);
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '获取二维码失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<void> deleteImage(int productId, int imageId) async {
    try {
      await _client.delete('/products/$productId/images/$imageId');
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '删除图片失败',
        statusCode: e.response?.statusCode,
      );
    }
  }

  Future<Product> findOrCreate({
    required String name,
    String series = '',
    String spec = '',
    int? originId,
    int? shelfLifeId,
    int? storageId,
    int? descriptionDocId,
  }) async {
    try {
      final body = <String, dynamic>{
        'name': name,
        'series': series,
        'spec': spec,
      };
      if (originId != null) body['origin_id'] = originId;
      if (shelfLifeId != null) body['shelf_life_id'] = shelfLifeId;
      if (storageId != null) body['storage_id'] = storageId;
      if (descriptionDocId != null) body['description_doc_id'] = descriptionDocId;
      final resp = await _client.post('/products/find-or-create', data: body);
      return Product.fromJson(
          (resp.data as Map<String, dynamic>)['data'] as Map<String, dynamic>);
    } on DioException catch (e) {
      throw AppException(
        e.response?.data?['error'] as String? ?? '查找/创建商品失败',
        statusCode: e.response?.statusCode,
      );
    }
  }
}