import { ApiProperty, ApiPropertyOptional } from "@nestjs/swagger";
import { ModuleAssignmentRule } from "@prisma/client";
import { Exclude, Expose, Type } from "class-transformer";
import { IsArray, IsDate, IsEnum, IsInt, IsNotEmpty, IsOptional, IsString, MaxLength } from "class-validator";

/**
 * DTO for adding a learning group (license allocation)
 */
@Exclude()
export class AddLearningGroupDto {
  @Expose()
  @ApiProperty({
    description: "Course ID to assign to the learning group",
    example: 1,
  })
  @IsNotEmpty()
  @IsInt()
  @Type(() => Number)
  courseId!: number;

  @Expose()
  @ApiPropertyOptional({
    description: "Team/Group name (participant group name)",
    example: "Sales Team",
  })
  @IsOptional()
  @IsString()
  @MaxLength(200)
  team?: string;

  @Expose()
  @ApiPropertyOptional({
    description: "Due date for completion",
    example: "2025-02-28",
  })
  @IsOptional()
  @Type(() => Date)
  @IsDate()
  dueDate?: Date;

  @Expose()
  @ApiProperty({
    description: "Array of participant IDs to assign to this learning group",
    example: [1, 2, 3],
    type: [Number],
  })
  @IsNotEmpty()
  @IsArray()
  @IsInt({ each: true })
  @Type(() => Number)
  participants!: number[];

  @Expose()
  @ApiPropertyOptional({
    description: "Module assignment rule - determines which eLearning modules to assign based on PRE BAT results",
    enum: ModuleAssignmentRule,
    example: ModuleAssignmentRule.ALL_MODULES,
    default: ModuleAssignmentRule.ALL_MODULES,
  })
  @IsOptional()
  @IsEnum(ModuleAssignmentRule)
  moduleAssignmentRule?: ModuleAssignmentRule;
}