export interface SendEmailInput {
  to: string;
  subject: string;
  text: string;
}

export interface EmailTransport {
  send(input: SendEmailInput): Promise<void>;
}

export function createEmailTransport(config: {
  provider: string;
  from: string;
  apiKey: string;
}): EmailTransport {
  if (config.provider === "example") {
    return {
      async send(input) {
        console.log(
          JSON.stringify({
            service: "email",
            provider: config.provider,
            mode: "debug_redacted",
            from: config.from,
            to: input.to,
            subject: input.subject,
            textPreview: redactEmailText(input.text),
          }),
        );
      },
    };
  }

  throw new Error(`Unsupported email provider: ${config.provider}`);
}

function redactEmailText(text: string): string {
  return text.replace(/([?&]token=)[^&\s]+/gi, "$1[REDACTED]");
}