/**
 * HVAC Announcements Admin JavaScript
 *
 * @package HVAC_Community_Events
 */

jQuery(document).ready(function($) {
    'use strict';
    
    // State variables
    let currentPage = 1;
    let totalPages = 1;
    let currentStatus = 'any';
    let searchTerm = '';
    let editorInstance = null;
    
    // Initialize
    init();
    
    /**
     * Initialize the announcements interface
     */
    function init() {
        loadAnnouncements();
        loadCategories();
        initializeEventHandlers();
        initializeEditor();
    }
    
    /**
     * Initialize TinyMCE editor
     */
    function initializeEditor() {
        if (typeof wp !== 'undefined' && wp.editor) {
            // Initialize WordPress editor
            wp.editor.initialize('announcement-content', {
                tinymce: {
                    wpautop: true,
                    plugins: 'lists link image media paste',
                    toolbar1: 'formatselect | bold italic | alignleft aligncenter alignright | bullist numlist | link unlink | wp_adv',
                    toolbar2: 'strikethrough hr forecolor pastetext removeformat charmap outdent indent undo redo wp_help',
                    height: 300
                },
                quicktags: true,
                mediaButtons: true
            });
        }
    }
    
    /**
     * Initialize event handlers
     */
    function initializeEventHandlers() {
        // Add announcement button
        $('#add-announcement-btn').on('click', function() {
            openModal();
        });
        
        // Modal close buttons
        $('.modal-close, .modal-cancel').on('click', function() {
            closeModal();
        });
        
        // Form submission
        $('#announcement-form').on('submit', function(e) {
            e.preventDefault();
            saveAnnouncement();
        });
        
        // Status filter
        $('#status-filter').on('change', function() {
            currentStatus = $(this).val();
            currentPage = 1;
            loadAnnouncements();
        });
        
        // Search
        $('#search-btn').on('click', function() {
            searchTerm = $('#announcement-search').val();
            currentPage = 1;
            loadAnnouncements();
        });
        
        $('#announcement-search').on('keypress', function(e) {
            if (e.which === 13) {
                searchTerm = $(this).val();
                currentPage = 1;
                loadAnnouncements();
            }
        });
        
        // Pagination
        $('#prev-page').on('click', function() {
            if (currentPage > 1) {
                currentPage--;
                loadAnnouncements();
            }
        });
        
        $('#next-page').on('click', function() {
            if (currentPage < totalPages) {
                currentPage++;
                loadAnnouncements();
            }
        });
        
        // Edit/Delete actions (delegated)
        $(document).on('click', '.edit-announcement', function() {
            const id = $(this).data('id');
            editAnnouncement(id);
        });
        
        $(document).on('click', '.delete-announcement', function() {
            const id = $(this).data('id');
            if (confirm(hvac_announcements.strings.confirm_delete)) {
                deleteAnnouncement(id);
            }
        });
        
        // Featured image selection
        $('#select-featured-image').on('click', function(e) {
            e.preventDefault();
            selectFeaturedImage();
        });
        
        $('#remove-featured-image').on('click', function(e) {
            e.preventDefault();
            removeFeaturedImage();
        });
    }
    
    /**
     * Load announcements via AJAX
     */
    function loadAnnouncements() {
        const data = {
            action: 'hvac_get_announcements',
            nonce: hvac_announcements.nonce,
            page: currentPage,
            per_page: 20,
            status: currentStatus,
            search: searchTerm
        };
        
        $.post(hvac_announcements.ajax_url, data, function(response) {
            if (response.success) {
                displayAnnouncements(response.data.announcements);
                updatePagination(response.data.current_page, response.data.pages);
            } else {
                showError(response.data || hvac_announcements.strings.error_loading);
            }
        });
    }
    
    /**
     * Display announcements in table
     */
    function displayAnnouncements(announcements) {
        const tbody = $('#announcements-list');
        tbody.empty();
        
        if (announcements.length === 0) {
            tbody.append('<tr><td colspan="6" class="no-items">No announcements found</td></tr>');
            return;
        }
        
        announcements.forEach(function(announcement) {
            const row = $('<tr>');
            
            // Title
            row.append('<td class="column-title"><strong>' + escapeHtml(announcement.title) + '</strong></td>');
            
            // Status
            const statusClass = 'status-' + announcement.status;
            row.append('<td class="column-status"><span class="' + statusClass + '">' + announcement.status + '</span></td>');
            
            // Categories
            const categories = announcement.categories.join(', ') || '-';
            row.append('<td class="column-categories">' + escapeHtml(categories) + '</td>');
            
            // Author
            row.append('<td class="column-author">' + escapeHtml(announcement.author) + '</td>');
            
            // Date
            row.append('<td class="column-date">' + announcement.date + '</td>');
            
            // Actions
            let actions = '<td class="column-actions">';
            if (announcement.can_edit) {
                actions += '<button class="button button-small edit-announcement" data-id="' + announcement.id + '">Edit</button> ';
            }
            if (announcement.can_delete) {
                actions += '<button class="button button-small delete-announcement" data-id="' + announcement.id + '">Delete</button>';
            }
            actions += '</td>';
            row.append(actions);
            
            tbody.append(row);
        });
    }
    
    /**
     * Update pagination controls
     */
    function updatePagination(current, total) {
        currentPage = current;
        totalPages = total;
        
        $('#current-page').text(current);
        $('#total-pages').text(total);
        
        $('#prev-page').prop('disabled', current <= 1);
        $('#next-page').prop('disabled', current >= total);
    }
    
    /**
     * Load categories for the form
     */
    function loadCategories() {
        $.post(hvac_announcements.ajax_url, {
            action: 'hvac_get_announcement_categories',
            nonce: hvac_announcements.nonce
        }, function(response) {
            if (response.success) {
                displayCategories(response.data);
            }
        });
    }
    
    /**
     * Display categories as checkboxes
     */
    function displayCategories(categories) {
        const container = $('#categories-container');
        container.empty();
        
        if (categories.length === 0) {
            container.append('<p class="no-categories">No categories available</p>');
            return;
        }
        
        categories.forEach(function(category) {
            const checkbox = $('<label class="category-checkbox">');
            checkbox.append('<input type="checkbox" name="categories[]" value="' + category.id + '">');
            checkbox.append(' ' + escapeHtml(category.name));
            container.append(checkbox);
        });
    }
    
    /**
     * Open the modal for adding/editing
     */
    function openModal(announcementId) {
        $('#announcement-modal').fadeIn();
        
        if (announcementId) {
            $('#modal-title').text('Edit Announcement');
            loadAnnouncementForEdit(announcementId);
        } else {
            $('#modal-title').text('Add New Announcement');
            resetForm();
        }
    }
    
    /**
     * Close the modal
     */
    function closeModal() {
        $('#announcement-modal').fadeOut();
        resetForm();
    }
    
    /**
     * Reset the form
     */
    function resetForm() {
        $('#announcement-form')[0].reset();
        $('#announcement-id').val('');
        
        // Reset editor
        if (wp.editor) {
            wp.editor.setContent('announcement-content', '');
        }
        
        // Reset featured image
        removeFeaturedImage();
        
        // Uncheck all categories
        $('#categories-container input[type="checkbox"]').prop('checked', false);
    }
    
    /**
     * Load announcement for editing
     */
    function loadAnnouncementForEdit(id) {
        $.post(hvac_announcements.ajax_url, {
            action: 'hvac_get_announcement',
            nonce: hvac_announcements.nonce,
            id: id
        }, function(response) {
            if (response.success) {
                populateForm(response.data);
            } else {
                showError(response.data || 'Failed to load announcement');
                closeModal();
            }
        });
    }
    
    /**
     * Populate form with announcement data
     */
    function populateForm(announcement) {
        $('#announcement-id').val(announcement.id);
        $('#announcement-title').val(announcement.title);
        $('#announcement-excerpt').val(announcement.excerpt);
        $('#announcement-status').val(announcement.status);
        $('#announcement-tags').val(announcement.tags);
        
        // Set content in editor
        if (wp.editor) {
            wp.editor.setContent('announcement-content', announcement.content);
        }
        
        // Set publish date
        if (announcement.date) {
            const date = new Date(announcement.date);
            const localDate = date.toISOString().slice(0, 16);
            $('#announcement-date').val(localDate);
        }
        
        // Set categories
        if (announcement.categories && announcement.categories.length > 0) {
            announcement.categories.forEach(function(catId) {
                $('#categories-container input[value="' + catId + '"]').prop('checked', true);
            });
        }
        
        // Set featured image
        if (announcement.featured_image_id) {
            $('#featured-image-id').val(announcement.featured_image_id);
            if (announcement.featured_image_url) {
                $('#featured-image-preview').html('<img src="' + announcement.featured_image_url + '" />');
                $('#remove-featured-image').show();
            }
        }
    }
    
    /**
     * Save announcement (create or update)
     */
    function saveAnnouncement() {
        // Get editor content
        let content = '';
        if (wp.editor) {
            content = wp.editor.getContent('announcement-content');
        }
        
        // Gather form data
        const formData = {
            action: $('#announcement-id').val() ? 'hvac_update_announcement' : 'hvac_create_announcement',
            nonce: hvac_announcements.nonce,
            id: $('#announcement-id').val(),
            title: $('#announcement-title').val(),
            content: content,
            excerpt: $('#announcement-excerpt').val(),
            status: $('#announcement-status').val(),
            publish_date: $('#announcement-date').val(),
            tags: $('#announcement-tags').val(),
            categories: [],
            featured_image_id: $('#featured-image-id').val()
        };
        
        // Get selected categories
        $('#categories-container input:checked').each(function() {
            formData.categories.push($(this).val());
        });
        
        // Send AJAX request
        $.post(hvac_announcements.ajax_url, formData, function(response) {
            if (response.success) {
                showSuccess(response.data.message);
                closeModal();
                loadAnnouncements();
            } else {
                showError(response.data || hvac_announcements.strings.error_saving);
            }
        });
    }
    
    /**
     * Edit announcement
     */
    function editAnnouncement(id) {
        openModal(id);
    }
    
    /**
     * Delete announcement
     */
    function deleteAnnouncement(id) {
        $.post(hvac_announcements.ajax_url, {
            action: 'hvac_delete_announcement',
            nonce: hvac_announcements.nonce,
            id: id
        }, function(response) {
            if (response.success) {
                showSuccess(response.data.message || hvac_announcements.strings.success_deleted);
                loadAnnouncements();
            } else {
                showError(response.data || 'Failed to delete announcement');
            }
        });
    }
    
    /**
     * Select featured image using WordPress media uploader
     */
    function selectFeaturedImage() {
        if (typeof wp.media === 'undefined') {
            return;
        }
        
        const mediaUploader = wp.media({
            title: 'Select Featured Image',
            button: {
                text: 'Use this image'
            },
            multiple: false
        });
        
        mediaUploader.on('select', function() {
            const attachment = mediaUploader.state().get('selection').first().toJSON();
            $('#featured-image-id').val(attachment.id);
            
            let imageUrl = attachment.url;
            if (attachment.sizes && attachment.sizes.medium) {
                imageUrl = attachment.sizes.medium.url;
            }
            
            $('#featured-image-preview').html('<img src="' + imageUrl + '" />');
            $('#remove-featured-image').show();
        });
        
        mediaUploader.open();
    }
    
    /**
     * Remove featured image
     */
    function removeFeaturedImage() {
        $('#featured-image-id').val('');
        $('#featured-image-preview').empty();
        $('#remove-featured-image').hide();
    }
    
    /**
     * Show success message
     */
    function showSuccess(message) {
        const notice = $('<div class="notice notice-success is-dismissible"><p>' + message + '</p></div>');
        $('.hvac-announcements-wrapper').prepend(notice);
        
        setTimeout(function() {
            notice.fadeOut(function() {
                notice.remove();
            });
        }, 3000);
    }
    
    /**
     * Show error message
     */
    function showError(message) {
        const notice = $('<div class="notice notice-error is-dismissible"><p>' + message + '</p></div>');
        $('.hvac-announcements-wrapper').prepend(notice);
        
        setTimeout(function() {
            notice.fadeOut(function() {
                notice.remove();
            });
        }, 5000);
    }
    
    /**
     * Escape HTML
     */
    function escapeHtml(text) {
        const map = {
            '&': '&amp;',
            '<': '&lt;',
            '>': '&gt;',
            '"': '&quot;',
            "'": '&#039;'
        };
        
        return text.replace(/[&<>"']/g, function(m) { return map[m]; });
    }
});