import { ApiProperty } from '@midwayjs/swagger';
import { Rule, RuleType } from '@midwayjs/validate';

/**
 * 属性输入DTO
 */
export class AttributeInputDTO {
  @ApiProperty({ description: '属性字典标识', example: 'brand' })
  @Rule(RuleType.string())
  dictName?: string;

  @ApiProperty({ description: '属性值', example: 'ZYN' })
  @Rule(RuleType.string())
  value?: string;
  
  @ApiProperty({ description: '属性ID', example: 1 })
  @Rule(RuleType.number())
  id?: number;

  @ApiProperty({ description: '属性名称', example: 'ZYN' })
  @Rule(RuleType.string())
  name?: string;

  @ApiProperty({ description: '属性显示名称', example: 'ZYN' })
  @Rule(RuleType.string())
  title?: string;
}

/**
 * DTO 用于创建产品
 */
export class CreateProductDTO {
  @ApiProperty({
    example: 'ZYN 6MG WINTERGREEN',
    description: '产品名称',
    required: true,
  })
  @Rule(RuleType.string().required().empty({ message: '产品名称不能为空' }))
  name: string;

  @ApiProperty({ example: '产品描述', description: '产品描述' })
  @Rule(RuleType.string())
  description: string;

  @ApiProperty({ description: '产品 SKU', required: false })
  @Rule(RuleType.string())
  sku?: string;

  @ApiProperty({ description: '分类ID (DictItem ID)', required: false })
  @Rule(RuleType.number())
  categoryId?: number;

  // 通用属性输入（中文注释：通过 attributes 统一提交品牌/口味/强度/尺寸/干湿等）
  @ApiProperty({ description: '属性列表', type: 'array' })
  @Rule(RuleType.array().required())
  attributes: AttributeInputDTO[];

  // 商品价格
  @ApiProperty({ description: '价格', example: 99.99, required: false })
  @Rule(RuleType.number())
  price?: number;

  // 促销价格
  @ApiProperty({ description: '促销价格', example: 99.99, required: false })
  @Rule(RuleType.number())
  promotionPrice?: number;

  // 中文注释：商品类型（默认 simple；bundle 需手动设置组成）
  @ApiProperty({ description: '商品类型', enum: ['simple', 'bundle'], default: 'simple', required: false })
  @Rule(RuleType.string().valid('simple', 'bundle').default('simple'))
  type?: string;

  // 中文注释：仅当 type 为 'bundle' 时，才需要提供 components
  @ApiProperty({ description: '产品组成', type: 'array', required: false })
  @Rule(
    RuleType.array()
      .items(
        RuleType.object({
          sku: RuleType.string().required(),
          quantity: RuleType.number().required(),
        })
      )
      .when('type', {
        is: 'bundle',
        then: RuleType.array().required(),
      })
  )
  components?: { sku: string; quantity: number }[];
}

/**
 * DTO 用于更新产品
 */
export class UpdateProductDTO {
  @ApiProperty({ example: 'ZYN 6MG WINTERGREEN', description: '产品名称' })
  @Rule(RuleType.string())
  name?: string;

  @ApiProperty({ example: '产品描述', description: '产品描述' })
  @Rule(RuleType.string())
  description?: string;

  @ApiProperty({ description: '产品 SKU', required: false })
  @Rule(RuleType.string())
  sku?: string;

  @ApiProperty({ description: '分类ID (DictItem ID)', required: false })
  @Rule(RuleType.number())
  categoryId?: number;

  // 商品价格
  @ApiProperty({ description: '价格', example: 99.99, required: false })
  @Rule(RuleType.number())
  price?: number;

  // 促销价格
  @ApiProperty({ description: '促销价格', example: 99.99, required: false })
  @Rule(RuleType.number())
  promotionPrice?: number;

  // 属性更新（中文注释：可选，支持增量替换指定字典的属性项）
  @ApiProperty({ description: '属性列表', type: 'array', required: false })
  @Rule(RuleType.array())
  attributes?: AttributeInputDTO[];

  // 中文注释：商品类型更新（simple 或 bundle）
  @ApiProperty({ description: '商品类型', enum: ['simple', 'bundle'], required: false })
  @Rule(RuleType.string().valid('simple', 'bundle'))
  type?: string;
}

/**
 * DTO 用于创建分类属性绑定
 */
export class CreateCategoryAttributeDTO {
  @ApiProperty({ description: '分类字典项ID', example: 1 })
  @Rule(RuleType.number().required())
  categoryItemId: number;

  @ApiProperty({ description: '属性字典ID列表', example: [2, 3] })
  @Rule(RuleType.array().items(RuleType.number()).required())
  attributeDictIds: number[];
}

/**
 * DTO 用于分页查询产品
 */
export class QueryProductDTO {
  @ApiProperty({ description: '当前页', example: 1 })
  @Rule(RuleType.number().default(1))
  current: number;

  @ApiProperty({ description: '每页数量', example: 10 })
  @Rule(RuleType.number().default(10))
  pageSize: number;

  @ApiProperty({ description: '搜索关键字', required: false })
  @Rule(RuleType.string())
  name?: string;

  @ApiProperty({ description: '分类ID', required: false })
  @Rule(RuleType.number())
  categoryId?: number;

  @ApiProperty({ description: '品牌ID', required: false })
  @Rule(RuleType.number())
  brandId?: number;
}

/**
 * DTO 用于设置产品组成
 */
export class SetProductComponentsDTO {
  @ApiProperty({ description: '产品组成', type: 'array', required: true })
  @Rule(
    RuleType.array()
      .items(
        RuleType.object({
          sku: RuleType.string().required(),
          quantity: RuleType.number().required(),
        })
      )
      .required()
  )
  components: { sku: string; quantity: number }[];
}