"use server";

import { createTransport } from "nodemailer";

export async function getReCaptchaSiteKey() {
  return process.env.RECAPTCHA_SITE_KEY;
}

const RECAPTCHA_SERVER_KEY = process.env.RECAPTCHA_SERVER_KEY;

export type SubmitContactReturn = { error: string } | { success: true };

export default async function SubmitContact(
  prevState: unknown,
  data: FormData
): Promise<SubmitContactReturn> {
  if (!RECAPTCHA_SERVER_KEY) {
    console.error(
      "RECAPTCHA_SERVER_KEY is not set. Please check your environment variables."
    );
    throw new Error("Server error: RECAPTCHA not configure correctly.");
  }

  const name = data.get("name");
  const email = data.get("email");
  const message = data.get("message");
  const recaptcha = data.get("g-recaptcha-response");

  if (!name || !email || !message) {
    return { error: "All fields are required." };
  }

  if (!recaptcha) {
    return { error: "Please complete the reCAPTCHA." };
  }

  try {
    const recaptchaResponse = await fetch(
      `https://www.google.com/recaptcha/api/siteverify`,
      {
        method: "POST",
        headers: {
          "Content-Type": "application/x-www-form-urlencoded",
        },
        body: `secret=${RECAPTCHA_SERVER_KEY}&response=${recaptcha}`,
      }
    );
    const recaptchaData = await recaptchaResponse.json();
    if (!recaptchaData.success) {
      return { error: "reCAPTCHA verification failed." };
    }
  } catch (e) {
    console.error(e);
    return { error: "Could not reach reCAPTCHA for verification." };
  }

  try {
    const transporter = createTransport({
      host: process.env.MAIL_HOST ?? "localhost",
      port: process.env.MAIL_PORT ? parseInt(process.env.MAIL_PORT) : undefined,
      secure: true,
      auth: {
        user: process.env.MAIL_USER,
        pass: process.env.MAIL_PASS,
      },
    });
    await transporter.sendMail({
      from: process.env.MAIL_FROM,
      to: process.env.MAIL_TO,
      subject: `From ${name}`,
      replyTo: email.toString(),
      text: `Name:${name}\nEmail: ${email}\nMessage:\n ${message}`,
    });
  } catch (e) {
    console.error(e);
    return { error: "Failed to send email." };
  }

  return { success: true };
}