import { IsString, IsNotEmpty, IsOptional, IsEnum, ValidateNested, IsArray, IsNumber, Min, Max } from 'class-validator';
import { Type } from 'class-transformer';

export enum OtpMethodEnum {
  SMS = 'SMS',
  USSD = 'USSD',
  IVR = 'IVR'
}

export enum IdentifierTypeEnum {
  MSISDN = 'MSISDN',
  ISE2 = 'ISE2',
  SUBSCRIBER_ID = 'SUBSCRIBER_ID'
}

export class IdentifierDto {
  @IsEnum(IdentifierTypeEnum)
  @IsNotEmpty()
  type: IdentifierTypeEnum;

  @IsString()
  @IsNotEmpty()
  value: string;
}

export class OtpConfigDto {
  @IsOptional()
  @IsString()
  message?: string;

  @IsOptional()
  @IsNumber()
  @Min(4)
  @Max(8)
  length?: number;

  @IsOptional()
  @IsString()
  senderName?: string;

  @IsOptional()
  @IsString()
  language?: string;
}

export class OtpChallengeRequestDto {
  @IsString()
  @IsNotEmpty()
  merchantId: string;

  @IsString()
  @IsNotEmpty()
  transactionId: string;

  @ValidateNested()
  @Type(() => IdentifierDto)
  identifier: IdentifierDto;

  @IsEnum(OtpMethodEnum)
  @IsNotEmpty()
  method: OtpMethodEnum;

  @IsString()
  @IsNotEmpty()
  country: string;

  @IsString()
  @IsNotEmpty()
  service: string;

  @IsOptional()
  @ValidateNested()
  @Type(() => OtpConfigDto)
  config?: OtpConfigDto;

  @IsOptional()
  @IsString()
  confirmationCode?: string;

  @IsOptional()
  metadata?: Record<string, any>;
}