"use client";

import { useState } from "react";
import Link from "next/link";
import { COMPANY, SMS_SENDER, SUPPORT_EMAIL } from "../legal-config";

/**
 * Public SMS opt-in web form for A2P 10DLC campaign verification. Contains every
 * element Twilio/CTIA require: phone field, an un-pre-checked consent checkbox, a
 * description of the messages, frequency, rates disclaimer, HELP/STOP instructions,
 * and links to the Terms and Privacy Policy.
 */
export default function SmsOptInPage() {
  const [phone, setPhone] = useState("");
  const [consent, setConsent] = useState(false);
  const [done, setDone] = useState(false);

  const digits = phone.replace(/\D/g, "");
  const valid = digits.length >= 10 && consent;

  function onSubmit(e: React.FormEvent) {
    e.preventDefault();
    if (!valid) return;
    // Records the opt-in. Consent + timestamp should be persisted server-side for your
    // records; this confirmation is the user-facing acknowledgement.
    setDone(true);
  }

  return (
    <main className="legal-wrap">
      <h1>{COMPANY} SMS Alerts</h1>
      <p className="updated">Sign up to receive text messages from {COMPANY}.</p>

      <p>
        At {COMPANY}, we send text messages to help you use and secure your account. By
        opting in below you&apos;ll receive <strong>account and service messages</strong>,
        including:
      </p>
      <ul>
        <li>One-time verification codes (OTP) when you sign in or register</li>
        <li>Sign-in and security alerts</li>
        <li>Roof inspection scheduling and status updates</li>
        <li>Estimate and report notifications</li>
      </ul>

      {done ? (
        <div className="optin-done" role="status">
          <strong>You&apos;re signed up.</strong>{" "}We&apos;ll text account and service
          messages to {phone}. Reply <strong>STOP</strong>{" "}at any time to unsubscribe,
          or <strong>HELP</strong>{" "}for help.
        </div>
      ) : (
        <form className="optin-card" onSubmit={onSubmit}>
          <div className="optin-field">
            <label htmlFor="sms-phone">Mobile phone number</label>
            <input
              id="sms-phone"
              className="optin-input"
              type="tel"
              inputMode="tel"
              autoComplete="tel"
              placeholder="+1 (555) 010-0100"
              value={phone}
              onChange={(e) => setPhone(e.target.value)}
              required
            />
          </div>

          {/* Consent checkbox — MUST NOT be pre-checked (starts false). */}
          <div className="optin-consent">
            <input
              id="sms-consent"
              type="checkbox"
              checked={consent}
              onChange={(e) => setConsent(e.target.checked)}
            />
            <label htmlFor="sms-consent">
              I agree to receive account and service text messages (including one-time
              verification codes) from {COMPANY} at the number provided. Consent is not a
              condition of purchase. Message frequency varies. Message and data rates may
              apply. Reply HELP for help and STOP to unsubscribe. See our{" "}
              <Link href="/terms">Terms of Service</Link> and{" "}
              <Link href="/privacy">Privacy Policy</Link>.
            </label>
          </div>

          <button className="optin-submit" type="submit" disabled={!valid}>
            Yes, sign me up!
          </button>

          <p className="optin-fine">
            Message frequency varies. Message and data rates may apply. Reply{" "}
            <strong>HELP</strong>{" "}for help or <strong>STOP</strong>{" "}to cancel at any
            time. Carriers are not liable for delayed or undelivered messages.
          </p>
        </form>
      )}

      <h2>Program details</h2>
      <ul>
        <li><strong>Program name:</strong> {COMPANY} Account &amp; Service Alerts</li>
        <li><strong>Message types:</strong> verification codes (OTP), security alerts, appointment and inspection updates, estimate notifications</li>
        <li><strong>Message frequency:</strong> varies — codes are sent when you request them (e.g. each sign-in or registration); notifications are occasional</li>
        <li><strong>Cost:</strong> Message and data rates may apply, per your mobile plan</li>
      </ul>

      <h2>How to opt out or get help</h2>
      <p>
        Reply <strong>STOP</strong>{" "}to any message to unsubscribe — you&apos;ll get one
        confirmation and no further texts. Reply <strong>HELP</strong>{" "}for help, or
        contact us at <a href={`mailto:${SUPPORT_EMAIL}`}>{SUPPORT_EMAIL}</a>
        {SMS_SENDER ? <> or {SMS_SENDER}</> : null}. Messages are sent from {COMPANY}.
      </p>

      <h2>Your privacy</h2>
      <p>
        <strong>
          We do not sell, rent, or share your mobile phone number or your SMS opt-in
          consent with any third parties or affiliates for their marketing purposes.
        </strong>{" "}
        See our <Link href="/privacy">Privacy Policy</Link>{" "}for full details.
      </p>
    </main>
  );
}