import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { IsIn, IsNotEmpty, IsString, IsUrl, ValidateIf } from 'class-validator';

/** OAuth2 token request (RFC 6749), as JSON or application/x-www-form-urlencoded. */
export class IssueTokenDto {
  @ApiProperty({ enum: ['authorization_code', 'password', 'refresh_token'] })
  @IsIn(['authorization_code', 'password', 'refresh_token'])
  grant_type!: 'authorization_code' | 'password' | 'refresh_token';

  @ValidateIf((dto: IssueTokenDto) => dto.grant_type === 'authorization_code')
  @IsString()
  @IsNotEmpty()
  @ApiPropertyOptional({
    description: 'authorization_code: code returned by Pireon',
  })
  code?: string;

  @ValidateIf((dto: IssueTokenDto) => dto.grant_type === 'authorization_code')
  @IsString()
  @IsNotEmpty()
  @ApiPropertyOptional({ description: 'authorization_code: PKCE verifier' })
  code_verifier?: string;

  @ValidateIf((dto: IssueTokenDto) => dto.grant_type === 'authorization_code')
  @IsUrl({ require_tld: false })
  @ApiPropertyOptional({
    description: 'authorization_code: redirect URI used to authorize',
  })
  redirect_uri?: string;

  @ValidateIf((dto: IssueTokenDto) => dto.grant_type === 'password')
  @IsString()
  @IsNotEmpty()
  @ApiPropertyOptional({ description: 'password: Pireon email' })
  username?: string;

  @ValidateIf((dto: IssueTokenDto) => dto.grant_type === 'password')
  @IsString()
  @IsNotEmpty()
  @ApiPropertyOptional({ description: 'password: Pireon password' })
  password?: string;

  @ValidateIf((dto: IssueTokenDto) => dto.grant_type === 'refresh_token')
  @IsString()
  @IsNotEmpty()
  @ApiPropertyOptional({ description: 'refresh_token' })
  refresh_token?: string;
}