import { Transform, Type } from 'class-transformer';
import {
  IsArray,
  IsBoolean,
  IsInt,
  IsNumber,
  IsOptional,
  IsString,
  Min,
  MinLength,
  ValidateNested,
} from 'class-validator';

export class StoreItemVariantSelectionDto {
  @IsString()
  @MinLength(1)
  variationId!: string;

  @IsString()
  @MinLength(1)
  optionId!: string;
}

export class CreateStoreItemVariantDto {
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => StoreItemVariantSelectionDto)
  selections!: StoreItemVariantSelectionDto[];

  @IsOptional()
  @IsNumber()
  @Min(0)
  price?: number;

  @IsOptional()
  @IsInt()
  @Min(0)
  stockQuantity?: number;
}

export class BatchCreateStoreItemsDto {
  @IsString()
  @MinLength(1)
  productId!: string;

  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => CreateStoreItemVariantDto)
  items!: CreateStoreItemVariantDto[];
}

export class ListStoreItemsDto {
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  page?: number;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  pageSize?: number;
}

export class ListPublicStoreItemsDto {
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  page?: number;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  pageSize?: number;

  @IsOptional()
  @IsString()
  categoryId?: string;

  @IsOptional()
  @IsString()
  brandId?: string;

  @IsOptional()
  @IsString()
  productId?: string;

  @IsOptional()
  @IsString()
  name?: string;

  @IsOptional()
  @Transform(({ value }) => value === 'true' || value === true)
  @IsBoolean()
  inStock?: boolean;

  @IsOptional()
  @Transform(({ value }) => value === 'true' || value === true)
  @IsBoolean()
  isFestival?: boolean;

  @IsOptional()
  @Type(() => Number)
  @IsNumber()
  @Min(0)
  minPrice?: number;

  @IsOptional()
  @Type(() => Number)
  @IsNumber()
  @Min(0)
  maxPrice?: number;
}

export class UpdateStoreItemVariantDto {
  @IsOptional()
  @IsNumber()
  @Min(0)
  price?: number;

  @IsOptional()
  @IsInt()
  @Min(0)
  stockQuantity?: number;

  @IsOptional()
  @IsNumber()
  @Min(0)
  discountedPrice?: number | null;

  @IsOptional()
  isFestival?: boolean;
}

export class BatchUpdateStoreItemDiscountDto {
  @IsString()
  @MinLength(1)
  id!: string;

  @IsOptional()
  @IsNumber()
  @Min(0)
  discountedPrice?: number | null;
}

export class BatchUpdateStoreItemDiscountsDto {
  @IsString()
  @MinLength(1)
  productId!: string;

  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => BatchUpdateStoreItemDiscountDto)
  items!: BatchUpdateStoreItemDiscountDto[];
}

export class SyncStoreItemVariantRowDto {
  @IsOptional()
  @IsString()
  id?: string;

  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => StoreItemVariantSelectionDto)
  selections!: StoreItemVariantSelectionDto[];

  @IsNumber()
  @Min(0)
  price!: number;

  @IsInt()
  @Min(0)
  stockQuantity!: number;
}

export class SyncProductStoreItemVariantsDto {
  @IsString()
  @MinLength(1)
  productId!: string;

  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => SyncStoreItemVariantRowDto)
  items!: SyncStoreItemVariantRowDto[];

  @IsArray()
  @IsString({ each: true })
  removedIds!: string[];
}

export class BatchUpdateFestivalRewardDto {
  @IsString()
  @MinLength(1)
  id!: string;

  @IsOptional()
  @IsInt()
  @Min(0)
  rewardPoints?: number | null;
}

export class BatchUpdateFestivalRewardsDto {
  @IsString()
  @MinLength(1)
  productId!: string;

  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => BatchUpdateFestivalRewardDto)
  items!: BatchUpdateFestivalRewardDto[];
}

// Backward-compatible aliases for existing imports
export {
  StoreItemVariantSelectionDto as StoreItemSelectionDto,
  CreateStoreItemVariantDto as CreateStoreItemDto,
  UpdateStoreItemVariantDto as UpdateStoreItemDto,
  SyncStoreItemVariantRowDto as SyncStoreItemRowDto,
  SyncProductStoreItemVariantsDto as SyncProductStoreItemsDto,
};