/**
 * Maple Carts - Frontend cart tracking.
 */
(function($) {
    'use strict';

    var MapleCarts = {
        saveTimeout: null,
        lastSavedData: '',
        
        init: function() {
            this.bindEvents();
            this.showGdprNotice();
            
            // Initial save after page load.
            setTimeout(function() {
                MapleCarts.saveCart();
            }, 2000);
        },

        bindEvents: function() {
            // Classic checkout fields.
            $(document).on('change keyup', '#billing_email', this.debounce(this.saveCart, 500));
            $(document).on('change keyup', '#billing_first_name, #billing_last_name, #billing_phone', this.debounce(this.saveCart, 1000));
            $(document).on('change', '#billing_address_1, #billing_city, #billing_state, #billing_postcode, #billing_country', this.debounce(this.saveCart, 1000));
            
            // WooCommerce Blocks checkout.
            $(document).on('change keyup', '[id^="email"]', this.debounce(this.saveCart, 500));
            $(document).on('change keyup', 'input[autocomplete="email"]', this.debounce(this.saveCart, 500));
            
            // Save on blur for email field.
            $(document).on('blur', '#billing_email, [id^="email"], input[autocomplete="email"]', function() {
                MapleCarts.saveCart();
            });
            
            // Cart updates.
            $(document.body).on('updated_cart_totals', this.saveCart);
            $(document.body).on('updated_checkout', this.saveCart);
            
            // Consent checkbox - save when checked.
            $(document).on('change', '#maple_carts_consent', function() {
                if ($(this).is(':checked')) {
                    MapleCarts.saveCart();
                }
            });
        },

        showGdprNotice: function() {
            if (mapleCartsData.gdprNotice && mapleCartsData.gdprNotice.length > 0) {
                var notice = $('<div class="maple-carts-gdpr-notice woocommerce-info">' + mapleCartsData.gdprNotice + '</div>');
                $('.woocommerce-checkout').prepend(notice);
            }
        },

        getFormData: function() {
            var data = {
                session_id: mapleCartsData.sessionId
            };

            // Check for consent checkbox if it exists.
            var consentCheckbox = $('#maple_carts_consent');
            if (consentCheckbox.length > 0 && !consentCheckbox.is(':checked')) {
                // Consent required but not given - don't save.
                return null;
            }
            data.consent = consentCheckbox.length > 0 ? (consentCheckbox.is(':checked') ? '1' : '0') : '1';

            // Get email - try multiple selectors for compatibility.
            var email = $('#billing_email').val() || 
                       $('[id^="email"]').val() || 
                       $('input[autocomplete="email"]').val() || 
                       $('input[type="email"]').first().val() || '';
            
            data.email = email.trim().toLowerCase();

            // Get billing fields.
            var billingFields = [
                'first_name', 'last_name', 'phone', 'address_1', 'address_2',
                'city', 'state', 'postcode', 'country'
            ];

            billingFields.forEach(function(field) {
                var value = $('#billing_' + field).val();
                if (value) {
                    data['billing_' + field] = value;
                }
            });

            // Try Blocks checkout fields.
            if (!data.billing_first_name) {
                data.billing_first_name = $('input[autocomplete="given-name"]').val() || '';
            }
            if (!data.billing_last_name) {
                data.billing_last_name = $('input[autocomplete="family-name"]').val() || '';
            }
            if (!data.billing_phone) {
                data.billing_phone = $('input[autocomplete="tel"]').val() || '';
            }

            return data;
        },

        saveCart: function() {
            var data = MapleCarts.getFormData();
            
            // Don't save if consent not given or data is null.
            if (!data) {
                return;
            }
            
            // Don't save without email or session.
            if (!data.email || !data.session_id) {
                return;
            }

            // Don't save if email is invalid.
            if (!MapleCarts.isValidEmail(data.email)) {
                return;
            }

            // Don't save if data hasn't changed.
            var dataHash = JSON.stringify(data);
            if (dataHash === MapleCarts.lastSavedData) {
                return;
            }

            data.action = 'maple_carts_save';
            data.nonce = mapleCartsData.nonce;

            $.post(mapleCartsData.ajaxUrl, data, function(response) {
                if (response.success) {
                    MapleCarts.lastSavedData = dataHash;
                }
            });
        },

        isValidEmail: function(email) {
            var re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
            return re.test(email);
        },

        debounce: function(func, wait) {
            return function() {
                var context = this, args = arguments;
                clearTimeout(MapleCarts.saveTimeout);
                MapleCarts.saveTimeout = setTimeout(function() {
                    func.apply(context, args);
                }, wait);
            };
        }
    };

    $(document).ready(function() {
        MapleCarts.init();
    });

})(jQuery);