/**
 * WP to HTML Admin JavaScript
 */

(function ($) {
    'use strict';

    var WPToHTML = {

        // State
        isProcessing: false,
        totalPosts: 0,
        processedPosts: 0,
        results: {
            converted: 0,
            skipped: 0,
            errors: 0,
            details: []
        },
        statusPollInterval: null,

        /**
         * Initialize
         */
        init: function () {
            this.bindEvents();
            this.startStatusPolling();
        },

        /**
         * Bind event handlers
         */
        bindEvents: function () {
            $('#wp-to-html-convert-all').on('click', $.proxy(this.startBulkConvert, this));
            $('#wp-to-html-clear-cache').on('click', $.proxy(this.clearCache, this));
        },

        /**
         * Start status polling
         */
        startStatusPolling: function () {
            var self = this;

            // Check status immediately
            this.checkStatus();

            // Poll every 3 seconds
            this.statusPollInterval = setInterval(function () {
                self.checkStatus();
            }, 3000);
        },

        /**
         * Stop status polling
         */
        stopStatusPolling: function () {
            if (this.statusPollInterval) {
                clearInterval(this.statusPollInterval);
                this.statusPollInterval = null;
            }
        },

        /**
         * Check regeneration status
         */
        checkStatus: function () {
            var self = this;

            $.ajax({
                url: wpToHtml.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'wp_to_html_get_status',
                    nonce: wpToHtml.statusNonce
                },
                success: function (response) {
                    if (response.success) {
                        self.updateStatusCard(response.data);
                    }
                }
            });
        },

        /**
         * Update the status card UI
         */
        updateStatusCard: function (status) {
            var $container = $('#wp-to-html-live-status');
            if (!$container.length) return;

            var html = '';
            var strings = wpToHtml.strings;

            // Get source label
            var sourceLabels = {
                'cron': strings.sourceCron,
                'admin_bar': strings.sourceAdminBar,
                'plugin_update': strings.sourcePluginUpdate,
                'settings_page': strings.sourceSettingsPage
            };
            var sourceLabel = status.source ? (sourceLabels[status.source] || '') : '';

            if (status.status === 'running' || status.status === 'pending') {
                var statusText = status.status === 'pending' ? strings.statusPending : strings.statusRunning;

                html = '<div class="status-running">';
                html += '<span class="dashicons dashicons-update spin"></span>';
                html += '<span class="status-text">' + statusText + '</span>';
                if (sourceLabel) {
                    html += '<span class="status-source">' + sourceLabel + '</span>';
                }
                if (status.total && status.total > 0) {
                    html += '<div class="status-progress">' + status.processed + ' / ' + status.total + ' pages processed</div>';
                }
                html += '</div>';
            } else if (status.status === 'complete') {
                html = '<div class="status-complete">';
                html += '<span class="dashicons dashicons-yes-alt"></span>';
                html += '<span class="status-text">' + strings.statusComplete + '</span>';
                html += '<div class="status-details">' + status.converted + ' converted, ' + status.skipped + ' skipped, ' + status.errors + ' errors</div>';
                html += '</div>';
            } else {
                // idle
                html = '<div class="status-idle">';
                html += '<span class="dashicons dashicons-clock"></span>';
                html += '<span class="status-text">' + strings.statusIdle + '</span>';
                html += '</div>';
            }

            $container.html(html);
        },

        /**
         * Start bulk conversion
         */
        startBulkConvert: function (e) {
            e.preventDefault();

            if (this.isProcessing) {
                return;
            }

            this.isProcessing = true;
            this.processedPosts = 0;
            this.results = {
                converted: 0,
                skipped: 0,
                errors: 0,
                details: []
            };

            // Disable buttons
            $('#wp-to-html-convert-all, #wp-to-html-clear-cache').prop('disabled', true);

            // Show progress bar
            $('#wp-to-html-progress').show();
            $('#wp-to-html-results').hide();
            this.updateProgress(0, wpToHtml.strings.processing);

            // Get total posts count first
            this.getTotalPosts();
        },

        /**
         * Get total posts count
         */
        getTotalPosts: function () {
            var self = this;

            $.ajax({
                url: wpToHtml.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'wp_to_html_get_posts_count',
                    nonce: wpToHtml.nonce
                },
                success: function (response) {
                    if (response.success) {
                        self.totalPosts = response.data.total;
                        self.processBatch(0);
                    } else {
                        self.handleError(response.data);
                    }
                },
                error: function () {
                    self.handleError(wpToHtml.strings.error);
                }
            });
        },

        /**
         * Process a batch of posts
         */
        processBatch: function (offset) {
            var self = this;

            $.ajax({
                url: wpToHtml.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'wp_to_html_bulk_convert',
                    nonce: wpToHtml.nonce,
                    offset: offset
                },
                success: function (response) {
                    if (response.success) {
                        // Update results
                        self.processedPosts += response.data.processed;
                        self.results.converted += response.data.converted;
                        self.results.skipped += response.data.skipped;
                        self.results.errors += response.data.errors;
                        self.results.details = self.results.details.concat(response.data.details);

                        // Update progress
                        var percent = self.totalPosts > 0
                            ? Math.round((self.processedPosts / self.totalPosts) * 100)
                            : 100;
                        self.updateProgress(percent, self.processedPosts + ' / ' + self.totalPosts);

                        // Continue or finish
                        if (response.data.has_more) {
                            self.processBatch(response.data.next_offset);
                        } else {
                            self.finishBulkConvert();
                        }
                    } else {
                        self.handleError(response.data);
                    }
                },
                error: function () {
                    self.handleError(wpToHtml.strings.error);
                }
            });
        },

        /**
         * Finish bulk conversion
         */
        finishBulkConvert: function () {
            this.isProcessing = false;

            // Update progress to complete
            this.updateProgress(100, wpToHtml.strings.complete);

            // Show results
            this.showResults();

            // Re-enable buttons
            $('#wp-to-html-convert-all, #wp-to-html-clear-cache').prop('disabled', false);

            // Refresh status immediately
            this.checkStatus();
        },

        /**
         * Update progress bar
         */
        updateProgress: function (percent, text) {
            $('.wp-to-html-progress-fill').css('width', percent + '%');
            $('.wp-to-html-progress-text').text(text);
        },

        /**
         * Show results
         */
        showResults: function () {
            var html = '<div class="result-summary">';
            html += '<div class="result-stat converted"><span class="number">' + this.results.converted + '</span><span class="label">Converted</span></div>';
            html += '<div class="result-stat skipped"><span class="number">' + this.results.skipped + '</span><span class="label">Skipped</span></div>';
            html += '<div class="result-stat errors"><span class="number">' + this.results.errors + '</span><span class="label">Errors</span></div>';
            html += '</div>';

            if (this.results.details.length > 0) {
                html += '<div class="result-details">';

                // Show up to 50 items
                var items = this.results.details.slice(0, 50);

                for (var i = 0; i < items.length; i++) {
                    var item = items[i];
                    var icon = 'yes-alt';
                    var statusClass = item.status;

                    if (item.status === 'skipped') {
                        icon = 'warning';
                    } else if (item.status === 'error') {
                        icon = 'dismiss';
                    }

                    html += '<div class="result-item ' + statusClass + '">';
                    html += '<span class="dashicons dashicons-' + icon + '"></span>';
                    html += '<strong>' + this.escapeHtml(item.title) + '</strong>';
                    html += '<span class="message">' + this.escapeHtml(item.message) + '</span>';
                    html += '</div>';
                }

                if (this.results.details.length > 50) {
                    html += '<p><em>Showing first 50 results...</em></p>';
                }

                html += '</div>';
            }

            $('#wp-to-html-results').html(html).show();
        },

        /**
         * Clear cache
         */
        clearCache: function (e) {
            e.preventDefault();

            if (this.isProcessing) {
                return;
            }

            if (!confirm(wpToHtml.strings.confirmClear)) {
                return;
            }

            this.isProcessing = true;
            $('#wp-to-html-convert-all, #wp-to-html-clear-cache').prop('disabled', true);

            var self = this;

            $.ajax({
                url: wpToHtml.ajaxUrl,
                type: 'POST',
                data: {
                    action: 'wp_to_html_clear_cache',
                    nonce: wpToHtml.nonce
                },
                success: function (response) {
                    self.isProcessing = false;
                    $('#wp-to-html-convert-all, #wp-to-html-clear-cache').prop('disabled', false);

                    if (response.success) {
                        alert(response.data.message);
                        location.reload();
                    } else {
                        self.handleError(response.data);
                    }
                },
                error: function () {
                    self.isProcessing = false;
                    $('#wp-to-html-convert-all, #wp-to-html-clear-cache').prop('disabled', false);
                    self.handleError(wpToHtml.strings.error);
                }
            });
        },

        /**
         * Handle error
         */
        handleError: function (message) {
            this.isProcessing = false;
            $('#wp-to-html-convert-all, #wp-to-html-clear-cache').prop('disabled', false);
            $('#wp-to-html-progress').hide();
            alert(message);
        },

        /**
         * Escape HTML
         */
        escapeHtml: function (text) {
            var div = document.createElement('div');
            div.textContent = text;
            return div.innerHTML;
        }
    };

    // Initialize on document ready
    $(document).ready(function () {
        WPToHTML.init();
    });

})(jQuery);