/**
 * MyAi Main Application Logic
 *
 * Page-specific form handlers for contact and subscribe forms.
 * Uses shared utilities from: i18n.js, utils/form-helpers.js, utils/api.js, modules/cookie-consent.js
 *
 * Depends on: jQuery, i18n.js (translation dict), shared utility modules
 */
(function ($) {
	"use strict";

	/* ============================================================
	   PAGE INITIALIZATION
	   ============================================================ */

	// Set footer year
	$('#year').text(new Date().getFullYear());

	// Load and display app version
	$.getJSON('/api/health/version').done(function (data) {
		if (data && data.version) {
			$('#app-version').text('v' + data.version);
		}
	});

	// Initialize language using shared utility
	window.MyAi.applyLanguage(window.MyAi.currentLang());
	$('.lang-flag').on('click', function () {
		window.MyAi.applyLanguage($(this).data('lang'));
	});

	/* ============================================================
	   HEADER / NAVIGATION
	   ============================================================ */

	/**
	 * Toggle mobile hamburger menu.
	 */
	$('#menuToggle').on('click', function () {
		var $nav = $('#mainNav');
		var open = !$nav.hasClass('is-open');
		$nav.toggleClass('is-open', open);
		$(this).attr('aria-expanded', open ? 'true' : 'false');
	});

	/**
	 * Close mobile menu when a nav link is clicked.
	 */
	$('.nav a').on('click', function () {
		$('#mainNav').removeClass('is-open');
		$('#menuToggle').attr('aria-expanded', 'false');
	});

	/* ============================================================
	   FORM HELPERS (imported from utils/form-helpers.js)
	   ============================================================ */
	// showFieldError, clearFieldErrors, isValidEmail, extractApiError
	// are now loaded from utils/form-helpers.js and exposed on window.MyAi

	/* ============================================================
	   CONTACT FORM
	   ============================================================ */

	/* ============================================================
	   CONTACT FORM HANDLER
	   ============================================================ */

	/**
	 * Display success message and reset form.
	 */
	function formSuccess() {
		$('#contactForm')[0].reset();
		submitMSG(true, window.MyAi.t('form.thanks'));
	}

	/**
	 * Play shake animation on form error.
	 */
	function formError() {
		$('#contactForm').removeClass().addClass('contact-form shake').one('animationend', function () {
			$(this).removeClass('shake');
		});
	}

	/**
	 * Update form message element with success/error state and message.
	 * @param {boolean} valid - True for success state, false for error
	 * @param {string} msg - Message to display
	 * @param {string} [severity] - CSS class suffix for color ('danger', 'warning', etc.)
	 */
	function submitMSG(valid, msg, severity) {
		var tone = valid ? 'text-success' : ('text-' + (severity || 'danger'));
		$('#msgSubmit').removeClass().addClass('form-message ' + tone).text(msg);
	}

	/**
	 * Handle contact form submission.
	 */
	$('#contactForm').on('submit', function (event) {
		event.preventDefault();
		var loader = $('#contactLoader'),
			button = $('#submit');

		var name = $('#name').val().trim();
		var email = $('#email').val().trim();
		var message = $('#message').val().trim();
		window.MyAi.clearFieldErrors(['nameError', 'emailError', 'messageError']);
		$('#msgSubmit').removeClass().addClass('form-message').text('');

		// Validate inputs
		var hasError = false;
		if (!name) { window.MyAi.showFieldError('nameError', window.MyAi.t('form.required.name')); hasError = true; }
		if (!email) { window.MyAi.showFieldError('emailError', window.MyAi.t('form.required.email')); hasError = true; }
		else if (!window.MyAi.isValidEmail(email)) { window.MyAi.showFieldError('emailError', window.MyAi.t('form.required.emailInvalid')); hasError = true; }
		if (!message) { window.MyAi.showFieldError('messageError', window.MyAi.t('form.required.message')); hasError = true; }
		if (hasError) return;

		loader.addClass('loader-visible');
		button.prop('disabled', true);

		/**
		 * Post contact form with captcha token.
		 */
		function postContact(token) {
			var payload = {
				Name: name,
				Email: email,
				Subject: '[MyAi.ro contact request]',
				Message: message,
				CaptchaToken: token || ''
			};
			$.ajax({
				type: 'POST',
				url: '/api/contact',
				data: JSON.stringify(payload),
				contentType: 'application/json; charset=utf-8',
				dataType: 'json'
			}).done(function (resp) {
				if (resp && resp.ok === true) formSuccess();
				else submitMSG(false, window.MyAi.t('form.captchaFailed'));
			}).fail(function (jqXHR) {
				submitMSG(false, window.MyAi.extractApiError(jqXHR.responseJSON, jqXHR.status, 'form.failed'), jqXHR.status === 429 ? 'warning' : 'danger');
				formError();
			}).always(function () {
				loader.removeClass('loader-visible');
				button.prop('disabled', false);
			});
		}

		if (window.grecaptcha && window.MyAi.getReCaptchaSiteKey()) {
			grecaptcha.ready(function () {
				grecaptcha.execute(window.MyAi.getReCaptchaSiteKey(), { action: 'contact' }).then(postContact);
			});
		} else {
			submitMSG(false, window.MyAi.t('form.captchaFailed'));
			formError();
			loader.removeClass('loader-visible');
			button.prop('disabled', false);
		}
	});

	/* ============================================================
	   SUBSCRIBE FORM HANDLER
	   ============================================================ */

	/**
	 * Handle subscribe form submission.
	 */
	$('#subscribeForm').on('submit', function (event) {
		event.preventDefault();
		var $msg = $('#subscribeMsg');
		var $button = $('#subscribeSubmit');
		var $loader = $('#contactLoader');
		var email = $('#subscribeEmail').val().trim();
		var consent = $('#subscribeConsent').is(':checked');

		/**
		 * Update subscribe form message.
		 */
		function setMsg(severity, key) {
			$msg.removeClass().addClass('form-message text-' + severity).text(window.MyAi.t(key));
		}

		window.MyAi.clearFieldErrors(['subscribeEmailError', 'subscribeConsentError']);
		$msg.removeClass().addClass('form-message').text('');

		// Validate inputs
		var hasError = false;
		if (!email) {
			window.MyAi.showFieldError('subscribeEmailError', window.MyAi.t('form.required.email'));
			hasError = true;
		} else if (!window.MyAi.isValidEmail(email)) {
			window.MyAi.showFieldError('subscribeEmailError', window.MyAi.t('form.required.emailInvalid'));
			hasError = true;
		}
		if (!consent) {
			window.MyAi.showFieldError('subscribeConsentError', window.MyAi.t('subscribe.noConsent'));
			hasError = true;
		}
		if (hasError) return;

		$loader.addClass('loader-visible');
		$button.prop('disabled', true);

		/**
		 * Post subscribe with captcha token.
		 */
		function postSubscribe(token) {
			$.ajax({
				type: 'POST',
				url: '/api/contact/subscribe',
				data: JSON.stringify({ Email: email, CaptchaToken: token || '' }),
				contentType: 'application/json; charset=utf-8',
				dataType: 'json'
			}).done(function (resp) {
				if (resp && resp.ok === true) {
					$('#subscribeForm')[0].reset();
					setMsg('success', 'subscribe.thanks');
				} else {
					setMsg('danger', 'form.captchaFailed');
				}
			}).fail(function (jqXHR) {
				$msg.removeClass().addClass('form-message text-' + (jqXHR.status === 429 ? 'warning' : 'danger'))
					.text(window.MyAi.extractApiError(jqXHR.responseJSON, jqXHR.status, 'subscribe.failed'));
			}).always(function () {
				$loader.removeClass('loader-visible');
				$button.prop('disabled', false);
			});
		}

		if (window.grecaptcha && window.MyAi.getReCaptchaSiteKey()) {
			grecaptcha.ready(function () {
				grecaptcha.execute(window.MyAi.getReCaptchaSiteKey(), { action: 'subscribe' }).then(postSubscribe);
			});
		} else {
			$loader.removeClass('loader-visible');
			$button.prop('disabled', false);
			setMsg('danger', 'form.captchaFailed');
		}
	});

	/* ============================================================
	   COOKIE CONSENT (handled by modules/cookie-consent.js)
	   ============================================================ */
	// Cookie banner, consent handlers, and storage are managed by
	// modules/cookie-consent.js and exposed via window.MyAi

	/* ============================================================
	   API & CONFIGURATION LOADING (from utils/api.js)
	   ============================================================ */
	// API utilities (checkApiLive, getRecaptchaWebKey, getGoogleTagManagerId, loadGoogleTagManager)
	// are loaded from utils/api.js and exposed via window.MyAi

	/* ============================================================
	   STARTUP
	   ============================================================ */

	$(window).on('load', function () {
		$.when(
			window.MyAi.checkApiLive(),
			window.MyAi.getRecaptchaWebKey(),
			window.MyAi.getGoogleTagManagerId()
		).always(window.MyAi.initConsent);
	});

})(jQuery);