/**
 * HVAC Announcements View Handler
 * Handles modal popup for viewing announcements
 *
 * @package HVAC_Community_Events
 */

jQuery(document).ready(function($) {
    'use strict';
    
    // Cache DOM elements
    var $modal = $('#announcement-modal');
    var $modalContent = $modal.find('.modal-body');
    var $modalClose = $modal.find('.modal-close');
    var isLoading = false;
    
    // Handle announcement link clicks
    $(document).on('click', '.announcement-link', function(e) {
        e.preventDefault();
        
        if (isLoading) {
            return;
        }
        
        var announcementId = $(this).data('id');
        
        if (!announcementId) {
            console.error('No announcement ID found');
            return;
        }
        
        openAnnouncementModal(announcementId);
    });
    
    // Handle modal close button
    $modalClose.on('click', function() {
        closeModal();
    });
    
    // Close modal when clicking outside
    $modal.on('click', function(e) {
        if (e.target === this) {
            closeModal();
        }
    });
    
    // Close modal with ESC key
    $(document).on('keydown', function(e) {
        if (e.key === 'Escape' && $modal.is(':visible')) {
            closeModal();
        }
    });
    
    /**
     * Open announcement in modal
     */
    function openAnnouncementModal(announcementId) {
        isLoading = true;
        
        // Show modal with loading state
        $modalContent.html('<div class="modal-loading"><span class="spinner is-active"></span><p>Loading announcement...</p></div>');
        $modal.fadeIn(300);
        
        // Prevent body scroll
        $('body').addClass('modal-open');
        
        // Make AJAX request to get announcement content
        $.ajax({
            url: hvac_ajax.ajax_url,
            type: 'POST',
            data: {
                action: 'hvac_view_announcement',
                id: announcementId,
                nonce: hvac_ajax.nonce
            },
            success: function(response) {
                if (response.success && response.data.content) {
                    $modalContent.html(response.data.content);
                    
                    // Focus on modal for accessibility
                    $modal.attr('aria-hidden', 'false');
                    $modalContent.focus();
                } else {
                    var errorMsg = response.data || 'Failed to load announcement';
                    $modalContent.html('<div class="modal-error"><p>' + errorMsg + '</p></div>');
                }
            },
            error: function(xhr, status, error) {
                console.error('AJAX error:', error);
                $modalContent.html('<div class="modal-error"><p>Error loading announcement. Please try again.</p></div>');
            },
            complete: function() {
                isLoading = false;
            }
        });
    }
    
    /**
     * Close modal
     */
    function closeModal() {
        $modal.fadeOut(300, function() {
            $modalContent.empty();
            $('body').removeClass('modal-open');
            $modal.attr('aria-hidden', 'true');
        });
    }
    
    /**
     * Handle Load More button for timeline
     */
    $(document).on('click', '.load-more-announcements', function(e) {
        e.preventDefault();
        
        var $button = $(this);
        var currentPage = parseInt($button.data('page'));
        var maxPages = parseInt($button.data('max'));
        
        if (currentPage > maxPages) {
            return;
        }
        
        $button.prop('disabled', true).text('Loading...');
        
        $.ajax({
            url: hvac_ajax.ajax_url,
            type: 'POST',
            data: {
                action: 'hvac_get_announcements',
                page: currentPage,
                per_page: 10,
                status: 'publish',
                nonce: hvac_ajax.nonce
            },
            success: function(response) {
                if (response.success && response.data.announcements) {
                    var announcements = response.data.announcements;
                    var $timeline = $('.timeline-wrapper');
                    
                    // Append new announcements to timeline
                    announcements.forEach(function(announcement) {
                        var html = buildAnnouncementItem(announcement);
                        $timeline.append(html);
                    });
                    
                    // Update button
                    if (currentPage >= maxPages) {
                        $button.parent().remove();
                    } else {
                        $button.data('page', currentPage + 1);
                        $button.prop('disabled', false).text('Load More Announcements');
                    }
                }
            },
            error: function() {
                $button.prop('disabled', false).text('Load More Announcements');
                alert('Error loading more announcements. Please try again.');
            }
        });
    });
    
    /**
     * Build announcement item HTML
     */
    function buildAnnouncementItem(announcement) {
        var html = '<article class="timeline-item">';
        html += '<div class="timeline-marker"></div>';
        html += '<div class="timeline-content">';
        html += '<header class="timeline-header">';
        html += '<h3 class="timeline-title">';
        // Ensure ID is numeric to prevent attribute injection
        html += '<a href="#" class="announcement-link" data-id="' + parseInt(announcement.id, 10) + '">';
        html += escapeHtml(announcement.title);
        html += '</a>';
        html += '</h3>';
        html += '<div class="timeline-meta">';
        html += '<span class="timeline-date">' + formatDate(announcement.date) + '</span>';
        html += '<span class="timeline-author">' + escapeHtml(announcement.author) + '</span>';
        html += '</div>';
        html += '</header>';
        
        if (announcement.featured_image) {
            html += '<div class="timeline-thumbnail">';
            // Safely build image element
            var imgSrc = String(announcement.featured_image || '').replace(/"/g, '&quot;');
            html += '<img src="' + imgSrc + '" alt="">';
            html += '</div>';
        }
        
        if (announcement.excerpt) {
            // Excerpt is pre-sanitized server-side with wp_kses_post, safe to insert as HTML
            html += '<div class="timeline-excerpt">' + announcement.excerpt + '</div>';
        }
        
        if (announcement.categories && announcement.categories.length > 0) {
            html += '<div class="timeline-categories">';
            announcement.categories.forEach(function(category) {
                html += '<span class="category-badge">' + escapeHtml(category) + '</span>';
            });
            html += '</div>';
        }
        
        html += '</div>';
        html += '</article>';
        
        return html;
    }
    
    /**
     * Format date string
     */
    function formatDate(dateString) {
        var date = new Date(dateString);
        var options = { year: 'numeric', month: 'long', day: 'numeric' };
        return date.toLocaleDateString('en-US', options);
    }
    
    /**
     * Escape HTML for security
     */
    function escapeHtml(text) {
        var map = {
            '&': '&amp;',
            '<': '&lt;',
            '>': '&gt;',
            '"': '&quot;',
            "'": '&#039;'
        };
        return text.replace(/[&<>"']/g, function(m) { return map[m]; });
    }
});