import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import {
  IsString,
  IsNumber,
  IsOptional,
  IsUUID,
  IsEnum,
  IsArray,
  ValidateNested,
  Min,
  MaxLength,
} from 'class-validator';
import { Type } from 'class-transformer';
import { OrderChannel, OrderType, OrderStatus } from '../entities/order.entity';

export class OrderItemDto {
  @ApiPropertyOptional({ description: 'ID del producto' })
  @IsOptional()
  @IsUUID()
  productId?: string;

  @ApiProperty({ description: 'Nombre del producto' })
  @IsString()
  @MaxLength(100)
  productName: string;

  @ApiProperty({ description: 'Cantidad', example: 2 })
  @IsNumber()
  @Min(0.001)
  quantity: number;

  @ApiProperty({ description: 'Precio unitario', example: 25.5 })
  @IsNumber()
  @Min(0)
  unitPrice: number;

  @ApiPropertyOptional({ description: 'Notas del item' })
  @IsOptional()
  @IsString()
  notes?: string;
}

export class CreateOrderDto {
  @ApiPropertyOptional({ description: 'ID del cliente' })
  @IsOptional()
  @IsUUID()
  customerId?: string;

  @ApiPropertyOptional({ enum: OrderChannel, default: OrderChannel.WHATSAPP })
  @IsOptional()
  @IsEnum(OrderChannel)
  channel?: OrderChannel;

  @ApiPropertyOptional({ enum: OrderType, default: OrderType.PICKUP })
  @IsOptional()
  @IsEnum(OrderType)
  orderType?: OrderType;

  @ApiProperty({ type: [OrderItemDto], description: 'Items del pedido' })
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => OrderItemDto)
  items: OrderItemDto[];

  @ApiPropertyOptional({ description: 'Cargo por delivery', default: 0 })
  @IsOptional()
  @IsNumber()
  @Min(0)
  deliveryFee?: number;

  @ApiPropertyOptional({ description: 'Descuento', default: 0 })
  @IsOptional()
  @IsNumber()
  @Min(0)
  discountAmount?: number;

  @ApiPropertyOptional({ description: 'Dirección de entrega' })
  @IsOptional()
  @IsString()
  deliveryAddress?: string;

  @ApiPropertyOptional({ description: 'Notas de entrega' })
  @IsOptional()
  @IsString()
  deliveryNotes?: string;

  @ApiPropertyOptional({ description: 'Notas del cliente' })
  @IsOptional()
  @IsString()
  customerNotes?: string;

  @ApiPropertyOptional({ description: 'Método de pago' })
  @IsOptional()
  @IsString()
  paymentMethod?: string;
}

export class UpdateOrderStatusDto {
  @ApiProperty({ enum: OrderStatus, description: 'Nuevo estado' })
  @IsEnum(OrderStatus)
  status: OrderStatus;

  @ApiPropertyOptional({ description: 'Razón (para cancelación)' })
  @IsOptional()
  @IsString()
  reason?: string;

  @ApiPropertyOptional({ description: 'Notas internas' })
  @IsOptional()
  @IsString()
  internalNotes?: string;
}