import { IsString, IsArray, ValidateNested, IsOptional } from 'class-validator';
import { Type } from 'class-transformer';
import { ApiProperty } from '@nestjs/swagger';

class WebhookMessageText {
  @ApiProperty()
  @IsString()
  body: string;
}

class WebhookMessageInteractive {
  @IsString()
  type: string;

  @IsOptional()
  button_reply?: { id: string; title: string };

  @IsOptional()
  list_reply?: { id: string; title: string; description?: string };
}

class WebhookMessage {
  @IsString()
  from: string;

  @IsString()
  id: string;

  @IsString()
  timestamp: string;

  @IsString()
  type: string;

  @IsOptional()
  @ValidateNested()
  @Type(() => WebhookMessageText)
  text?: WebhookMessageText;

  @IsOptional()
  interactive?: WebhookMessageInteractive;

  @IsOptional()
  image?: { id: string; mime_type: string; caption?: string };

  @IsOptional()
  audio?: { id: string; mime_type: string };

  @IsOptional()
  document?: { id: string; mime_type: string; filename?: string };

  @IsOptional()
  location?: { latitude: number; longitude: number; name?: string; address?: string };
}

class WebhookContact {
  profile: { name: string };
  wa_id: string;
}

class WebhookStatus {
  @IsString()
  id: string;

  @IsString()
  status: string;

  @IsString()
  timestamp: string;

  @IsString()
  recipient_id: string;

  @IsOptional()
  errors?: Array<{ code: number; title: string; message: string }>;
}

class WebhookMetadata {
  @IsString()
  display_phone_number: string;

  @IsString()
  phone_number_id: string;
}

class WebhookValue {
  @IsString()
  messaging_product: string;

  @ValidateNested()
  @Type(() => WebhookMetadata)
  metadata: WebhookMetadata;

  @IsOptional()
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => WebhookContact)
  contacts?: WebhookContact[];

  @IsOptional()
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => WebhookMessage)
  messages?: WebhookMessage[];

  @IsOptional()
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => WebhookStatus)
  statuses?: WebhookStatus[];
}

class WebhookChange {
  @ValidateNested()
  @Type(() => WebhookValue)
  value: WebhookValue;

  @IsString()
  field: string;
}

class WebhookEntry {
  @IsString()
  id: string;

  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => WebhookChange)
  changes: WebhookChange[];
}

export class WebhookPayloadDto {
  @ApiProperty({ description: 'Always "whatsapp_business_account"' })
  @IsString()
  object: string;

  @ApiProperty({ description: 'Array of webhook entries' })
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => WebhookEntry)
  entry: WebhookEntry[];
}