import { IsNotEmpty, IsString, IsEnum, IsNumber, IsOptional, IsBoolean, IsDateString, Min } from 'class-validator';
import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { Type } from 'class-transformer';
import { CouponType } from '../entities/coupon.entity';

export class CreateCouponDto {
  @IsNotEmpty()
  @IsString()
  @ApiProperty({ example: 'DISCOUNT10', description: 'Unique coupon code' })
  code!: string;

  @IsNotEmpty()
  @IsString()
  @ApiProperty({ example: '10% Off', description: 'Coupon name' })
  name!: string;

  @IsOptional()
  @IsString()
  @ApiPropertyOptional({ example: 'Get 10% off on your order', description: 'Coupon description' })
  description?: string;

  @IsNotEmpty()
  @IsEnum(CouponType)
  @ApiProperty({ enum: CouponType, example: CouponType.PERCENTAGE, description: 'Coupon type' })
  type!: CouponType;

  @IsNotEmpty()
  @IsNumber()
  @Min(0)
  @Type(() => Number)
  @ApiProperty({ example: 10, description: 'Discount value (amount or percentage)' })
  value!: number;

  @IsOptional()
  @IsNumber()
  @Min(0)
  @Type(() => Number)
  @ApiPropertyOptional({ example: 50000, description: 'Maximum discount amount (for percentage coupons)' })
  maxDiscount?: number;

  @IsOptional()
  @IsNumber()
  @Min(0)
  @Type(() => Number)
  @ApiPropertyOptional({ example: 100000, description: 'Minimum order amount to use coupon' })
  minOrderAmount?: number;

  @IsOptional()
  @IsNumber()
  @Min(1)
  @Type(() => Number)
  @ApiPropertyOptional({ example: 100, description: 'Maximum number of times coupon can be used' })
  maxUses?: number;

  @IsOptional()
  @IsNumber()
  @Min(1)
  @Type(() => Number)
  @ApiPropertyOptional({ example: 1, description: 'Maximum uses per user' })
  maxUsesPerUser?: number;

  @IsOptional()
  @IsDateString()
  @ApiPropertyOptional({ example: '2024-01-01T00:00:00Z', description: 'Coupon validity start date' })
  startDate?: string;

  @IsOptional()
  @IsDateString()
  @ApiPropertyOptional({ example: '2024-12-31T23:59:59Z', description: 'Coupon validity end date' })
  endDate?: string;

  @IsOptional()
  @IsBoolean()
  @Type(() => Boolean)
  @ApiPropertyOptional({ example: true, description: 'Whether coupon is active' })
  isActive?: boolean;
}