(function ($) {
    "use strict";

    var reCaptchaSiteKey = null;
    var gTagManagerId = null;
    var CONSENT_KEY = "myai_cookie_consent";

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

    $('#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');
    });

    $('.nav a').on('click', function () {
        $('#mainNav').removeClass('is-open');
        $('#menuToggle').attr('aria-expanded', 'false');
    });

    function getRecaptchaWebKey() {
        return $.get('/api/contact').done(function (res) {
            reCaptchaSiteKey = res;
            if (reCaptchaSiteKey && !window.__recaptcha_loaded) {
                window.__recaptcha_loaded = true;
                var script = document.createElement('script');
                script.setAttribute('src', 'https://www.google.com/recaptcha/api.js?render=' + reCaptchaSiteKey);
                document.head.appendChild(script);
            }
        }).fail(function () {
            console.warn('Could not load reCaptcha site key from /api/contact');
        });
    }

    function getGoogleTagManagerId() {
        return $.get('/api/google/tagmanager').done(function (res) {
            gTagManagerId = res;
        }).fail(function () {
            console.warn('Could not load Google Tag Manager id from /api/google/tagmanager');
        });
    }

    function loadGoogleTagManager() {
        if (window.__gtm_loaded || !gTagManagerId) return;
        window.__gtm_loaded = true;
        window.dataLayer = window.dataLayer || [];
        window.dataLayer.push({ 'gtm.start': new Date().getTime(), event: 'gtm.js' });
        var script = document.createElement('script');
        script.async = true;
        script.src = 'https://www.googletagmanager.com/gtm/js?id=' + gTagManagerId;
        document.head.appendChild(script);
    }

    function getConsent() {
        try { return JSON.parse(localStorage.getItem(CONSENT_KEY)); } catch { return null; }
    }

    function setConsent(consent) {
        localStorage.setItem(CONSENT_KEY, JSON.stringify(consent));
    }

    function applyConsent(consent) {
        if (consent && consent.analytics === true) loadGoogleTagManager();
    }

    function showBanner() { $('#cookieBanner').fadeIn(200); }
    function hideBanner() { $('#cookieBanner').fadeOut(200); }
    function showManage() { $('#cookieManage').show(); }

    $('#cookieReject, #cookieNecessary').on('click', function () {
        setConsent({ necessary: true, analytics: false, ts: new Date().toISOString() });
        hideBanner();
        showManage();
    });

    $('#cookieAccept').on('click', function () {
        var consent = { necessary: true, analytics: true, ts: new Date().toISOString() };
        setConsent(consent);
        applyConsent(consent);
        hideBanner();
        showManage();
    });

    $('#cookieManage').on('click', function (e) {
        e.preventDefault();
        showBanner();
    });

    function initConsent() {
        var consent = getConsent();
        if (!consent) showBanner();
        else { applyConsent(consent); showManage(); }
    }

    function submitMSG(valid, msg) {
        var msgClasses = valid ? 'form-message text-success' : 'form-message text-danger';
        $('#msgSubmit').removeClass().addClass(msgClasses).text(msg);
    }

    function formSuccess() {
        $('#contactForm')[0].reset();
        submitMSG(true, 'Thank you for your message.');
    }

    function formError() {
        $('#contactForm').removeClass().addClass('contact-form shake').one('animationend', function () {
            $(this).removeClass('shake');
        });
    }

    $('#contactForm').on('submit', function (event) {
        event.preventDefault();
        var loader = $('#contactLoader');
        var button = $('#submit');
        loader.css('display', 'flex');
        button.prop('disabled', true);
        $('#msgSubmit').text('');

        function postContact(token) {
            var message = {
                Name: $('#name').val(),
                Email: $('#email').val(),
                Subject: '[MyAi.ro contact request]',
                Message: $('#message').val(),
                CaptchaToken: token || ''
            };
            $.ajax({
                type: 'POST',
                url: '/api/contact',
                data: JSON.stringify(message),
                contentType: 'application/json; charset=utf-8',
                dataType: 'json'
            }).done(function (resp) {
                if (resp && resp.ok === true) formSuccess();
                else submitMSG(false, 'Captcha verification failed.');
            }).fail(function () {
                submitMSG(false, 'Failed to send the message.');
                formError();
            }).always(function () {
                loader.hide();
                button.prop('disabled', false);
            });
        }

        if (window.grecaptcha && reCaptchaSiteKey) {
            grecaptcha.ready(function () {
                grecaptcha.execute(reCaptchaSiteKey, { action: 'contact' }).then(postContact);
            });
        } else {
            postContact('');
        }
    });

    $('#cvFile').on('change', function () {
        var file = this.files && this.files[0];
        $('#cvFileName').text(file ? file.name : 'PDF only, max size handled by backend');
    });

    $('#cvMatcherForm').on('submit', async function (event) {
        event.preventDefault();
        var file = $('#cvFile')[0] && $('#cvFile')[0].files[0];
        var jobUrl = $('#jobUrl').val();
        var jobDescription = $('#jobDescription').val();
        var consent = $('#gdprConsent').is(':checked');
        var $msg = $('#matcherMsg');
        var $button = $('#matchSubmit');
        var $result = $('#matchResult');

        if (!file) { $msg.removeClass().addClass('form-message text-danger').text('Please upload a CV PDF.'); return; }
        if (!jobUrl && !jobDescription) { $msg.removeClass().addClass('form-message text-danger').text('Add a job link or paste a job description.'); return; }
        if (!consent) { $msg.removeClass().addClass('form-message text-danger').text('GDPR consent is required.'); return; }

        $button.prop('disabled', true).text('Processing...');
        $msg.removeClass().addClass('form-message').text('Extracting CV and matching job...');
        $result.html('<div class="empty-result">Processing CV PDF and job input. Backend endpoints must be available.</div>');

        try {
            var formData = new FormData();
            formData.append('cv', file);
            formData.append('gdprConsent', String(consent));

            var cvResponse = await fetch('/api/rag/cv', { method: 'POST', body: formData });
            if (!cvResponse.ok) throw new Error('CV extraction failed');
            var cvData = await cvResponse.json();

            var matchResponse = await fetch('/api/rag/match-job', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    cvDocumentId: cvData.documentId || cvData.cvDocumentId,
                    jobUrl: jobUrl,
                    jobDescription: jobDescription,
                    gdprConsent: consent
                })
            });
            if (!matchResponse.ok) throw new Error('Job matching failed');
            var match = await matchResponse.json();
            renderMatchResult(match);
            $msg.removeClass().addClass('form-message text-success').text('Match completed.');
        } catch (err) {
            console.error(err);
            $msg.removeClass().addClass('form-message text-danger').text(err.message || 'Failed to run the matcher.');
            $result.html('<div class="empty-result">The frontend is ready, but the backend endpoints /api/rag/cv and /api/rag/match-job must be implemented.</div>');
        } finally {
            $button.prop('disabled', false).text('Extract CV and match job');
        }
    });

    function renderMatchResult(match) {
        var score = match.score || match.matchScore || 0;
        var summary = match.summary || 'No summary returned.';
        var strengths = match.strengths || [];
        var gaps = match.gaps || match.missingSkills || [];
        var evidence = match.evidence || match.retrievedChunks || [];

        function list(items) {
            if (!items || !items.length) return '<p class="empty-result">No items returned.</p>';
            return '<ul class="result-list">' + items.map(function (x) {
                var text = typeof x === 'string' ? x : (x.text || x.title || JSON.stringify(x));
                return '<li>' + escapeHtml(text) + '</li>';
            }).join('') + '</ul>';
        }

        $('#matchResult').html(
            '<div class="score-badge">' + Number(score).toFixed(0) + '%</div>' +
            '<p>' + escapeHtml(summary) + '</p>' +
            '<h3>Strengths</h3>' + list(strengths) +
            '<h3>Gaps</h3>' + list(gaps) +
            '<h3>Retrieved CV evidence</h3>' + list(evidence)
        );
    }

    function escapeHtml(value) {
        return String(value).replace(/[&<>'"]/g, function (char) {
            return ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', "'": '&#39;', '"': '&quot;' })[char];
        });
    }

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