// tamayouz.js
jQuery(function ($) {
  'use strict';

  const section = $('#tamayouz_redemption_section');
  const phoneInput = section.find('#tamayouz_phone');
  const sendOtpBtn = section.find('#tamayouz_send_otp');
  const verifyOtpBtn = section.find('#tamayouz_verify_otp');
  const step1 = section.find('.tamayouz_step.step1');
  const step2 = section.find('.tamayouz_step.step2');
  const otpInputs = section.find('.otp_digit');

  const msgSuccess = section.find('.woocommerce-message');
  const msgError = section.find('.woocommerce-error');
  const successMessage = $('#tamayouz_success_message');

  let countdownInterval = null;

  function clearMessages() {
    msgSuccess.hide().text('');
    msgError.hide().text('');
  }

  function showError(msg) {
    msgError.text(msg).show();
    msgSuccess.hide();
  }

  function showSuccess(msg) {
    msgSuccess.text(msg).show();
    msgError.hide();
  }

  function showPending(msg) {
    msgSuccess.text(msg).css({
      display: 'block',
      backgroundColor: '#fffbe6',
      borderColor: '#ffe58f',
      color: '#ad8b00'
    });
    msgError.hide();
  }

  function toggleButtons(disabled) {
    sendOtpBtn.prop('disabled', disabled);
    verifyOtpBtn.prop('disabled', disabled);
  }

  function validateOtpInput() {
    const otp = otpInputs.map(function () {
      return $(this).val();
    }).get().join('');
    verifyOtpBtn.prop('disabled', otp.length !== 4 || !/^\d{4}$/.test(otp));
  }

  function startCountdown(seconds) {
    let remaining = seconds;
    sendOtpBtn.prop('disabled', true).text(`${TamayouzAjax.messages.resend_otp_in || 'Resend OTP in'} ${remaining}s`);
    countdownInterval = setInterval(() => {
      remaining--;
      if (remaining > 0) {
        sendOtpBtn.text(`${TamayouzAjax.messages.resend_otp_in || 'Resend OTP in'} ${remaining}s`);
      } else {
        stopCountdown();
      }
    }, 1000);
  }

  function stopCountdown() {
    clearInterval(countdownInterval);
    sendOtpBtn.prop('disabled', false).text(TamayouzAjax.messages.request_otp || 'Get OTP');
  }

  // Auto advance OTP fields
  otpInputs.on('input', function () {
    const val = $(this).val();
    if (!/^\d?$/.test(val)) $(this).val('');
    if (val.length === 1) $(this).next('.otp_digit').focus();
    validateOtpInput();
  });

  // If coupon already applied (from PHP session), show success and disable UI
  if (TamayouzAjax.already_applied) {
    step1.hide();
    step2.hide();
    successMessage.text(TamayouzAjax.messages.discount_applied || '10% Tamayouz discount successfully applied to eligible items.').show();
  }

  sendOtpBtn.on('click', function () {
    clearMessages();
    let phone = phoneInput.val().trim();

    if (!/^05\d{8}$/.test(phone)) {
      showError(TamayouzAjax.messages.invalid_phone || 'Enter a valid STC number starting with 05');
      return;
    }

    if (phone.startsWith('0')) phone = phone.substring(1);

    toggleButtons(true);
    startCountdown(60);

    $.post(TamayouzAjax.ajax_url, {
      action: 'tamayouz_apply_discount',
      nonce: TamayouzAjax.nonce,
      step: 'send_otp',
      phone: phone
    }, function (res) {
      toggleButtons(false);
      if (res.success) {
        step1.hide();
        step2.show();
        msgSuccess.hide();
      } else {
        stopCountdown();
        showError(res.data || TamayouzAjax.messages.default_error || 'Failed to send OTP.');
      }
    }).fail(() => {
      toggleButtons(false);
      stopCountdown();
      showError(TamayouzAjax.messages.default_error || 'Something went wrong.');
    });
  });

  verifyOtpBtn.on('click', function () {
    clearMessages();
    let phone = phoneInput.val().trim();
    const otp = otpInputs.map(function () {
      return $(this).val();
    }).get().join('');

    if (!/^05\d{8}$/.test(phone)) {
      showError(TamayouzAjax.messages.invalid_phone || 'Enter a valid STC number starting with 05');
      return;
    }

    if (!/^\d{4}$/.test(otp)) {
      showError(TamayouzAjax.messages.invalid_otp || 'Please enter a valid 4-digit OTP.');
      return;
    }

    if (phone.startsWith('0')) phone = phone.substring(1);

    toggleButtons(true);
    showPending(TamayouzAjax.messages.verifying || 'Verifying...');

    $.post(TamayouzAjax.ajax_url, {
      action: 'tamayouz_apply_discount',
      nonce: TamayouzAjax.nonce,
      step: 'verify_otp',
      phone: phone,
      otp: otp
    }, function (res) {
      toggleButtons(false);
      if (res.success) {
        showSuccess(res.data || TamayouzAjax.messages.discount_applied || 'Discount applied successfully!');
        step2.hide();
        $('#tamayouz_info_message').hide();
        successMessage.text(TamayouzAjax.messages.discount_applied || '10% Tamayouz discount successfully applied to eligible items.').show();
        $('body').trigger('update_checkout');
      } else {
        step2.show();
        showError(res.data || TamayouzAjax.messages.otp_failed || 'OTP verification failed. Try again.');
      }
    }).fail(() => {
      toggleButtons(false);
      step2.show();
      showError(TamayouzAjax.messages.default_error || 'Something went wrong. Please try again.');
    });
  });

  validateOtpInput();
});
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'CodeFig_Tamayouz_Checkout' not found in /home/thestorefromstc.tariq.work/public_html/wp-content/plugins/tamayouz/tamayouz.php:32
Stack trace:
#0 /home/thestorefromstc.tariq.work/public_html/wp-includes/class-wp-hook.php(324): {closure}()
#1 /home/thestorefromstc.tariq.work/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters()
#2 /home/thestorefromstc.tariq.work/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action()
#3 /home/thestorefromstc.tariq.work/public_html/wp-settings.php(578): do_action()
#4 /home/thestorefromstc.tariq.work/public_html/wp-config.php(103): require_once('/home/thestoref...')
#5 /home/thestorefromstc.tariq.work/public_html/wp-load.php(50): require_once('/home/thestoref...')
#6 /home/thestorefromstc.tariq.work/public_html/wp-blog-header.php(13): require_once('/home/thestoref...')
#7 /home/thestorefromstc.tariq.work/public_html/index.php(17): require('/home/thestoref...')
#8 {main}
  thrown in <b>/home/thestorefromstc.tariq.work/public_html/wp-content/plugins/tamayouz/tamayouz.php</b> on line <b>32</b><br />
<br />
<b>Notice</b>:  Function _load_textdomain_just_in_time was called <strong>incorrectly</strong>. Translation loading for the <code>woocommerce</code> domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the <code>init</code> action or later. Please see <a href="https://developer.wordpress.org/advanced-administration/debug/debug-wordpress/">Debugging in WordPress</a> for more information. (This message was added in version 6.7.0.) in <b>/home/thestorefromstc.tariq.work/public_html/wp-includes/functions.php</b> on line <b>6121</b><br />