import { IsOptional, IsString, IsNumber, Min, IsEnum, IsIn } from 'class-validator';
import { Type } from 'class-transformer';
import { ApiPropertyOptional } from '@nestjs/swagger';
import { UserRole, UserStatus } from '../user.entity';

export class QueryUserDto {
    @ApiPropertyOptional({
        description: '用户名',
        example: 'admin',
    })
    @IsOptional()
    @IsString()
    username?: string;

    @ApiPropertyOptional({
        description: '真实姓名',
        example: '张三',
    })
    @IsOptional()
    @IsString()
    realName?: string;

    @ApiPropertyOptional({
        description: '邮箱',
        example: 'admin@example.com',
    })
    @IsOptional()
    @IsString()
    email?: string;

    @ApiPropertyOptional({
        description: '角色',
        enum: UserRole,
        example: UserRole.ADMIN,
    })
    @IsOptional()
    @IsEnum(UserRole)
    role?: UserRole;

    @ApiPropertyOptional({
        description: '状态',
        enum: UserStatus,
        example: UserStatus.ACTIVE,
    })
    @IsOptional()
    @IsEnum(UserStatus)
    status?: UserStatus;

    @ApiPropertyOptional({
        description: '页码',
        example: 1,
        minimum: 1,
        default: 1,
    })
    @IsOptional()
    @Type(() => Number)
    @IsNumber()
    @Min(1)
    page?: number = 1;

    @ApiPropertyOptional({
        description: '每页数量',
        example: 10,
        minimum: 1,
        default: 10,
    })
    @IsOptional()
    @Type(() => Number)
    @IsNumber()
    @Min(1)
    limit?: number = 10;

    @ApiPropertyOptional({
        description: '排序字段',
        example: 'createdAt',
        default: 'createdAt',
    })
    @IsOptional()
    @IsString()
    @IsIn(['createdAt', 'updatedAt', 'lastLoginAt'])
    sortBy?: string = 'createdAt';

    @ApiPropertyOptional({
        description: '排序方向',
        example: 'DESC',
        enum: ['ASC', 'DESC'],
        default: 'DESC',
    })
    @IsOptional()
    @IsString()
    @IsIn(['ASC', 'DESC'])
    sortOrder?: 'ASC' | 'DESC' = 'DESC';
}