/**
 * ROI APU Search - Analytics Dashboard Scripts
 *
 * @package ROI_APU_Search
 * @since 1.2.0
 */

(function() {
    'use strict';

    // State
    var currentPages = {
        'top-searches': 1,
        'top-clicks': 1,
        'zero-results': 1
    };

    /**
     * Initialize Bootstrap tooltips
     */
    function initTooltips() {
        var tooltipTriggerList = document.querySelectorAll('[data-bs-toggle="tooltip"]');
        if (tooltipTriggerList.length > 0 && typeof bootstrap !== 'undefined') {
            Array.prototype.slice.call(tooltipTriggerList).forEach(function(el) {
                new bootstrap.Tooltip(el);
            });
        }
    }

    /**
     * Show success message
     */
    function showSuccessMessage(message) {
        var container = document.getElementById('alertContainer');
        if (!container) return;
        container.innerHTML = '<div class="admin-notice notice-success mb-3"><i class="bi bi-check-circle me-2"></i><strong>' + message + '</strong></div>';
        setTimeout(function() { container.innerHTML = ''; }, 3000);
    }

    /**
     * Show error message
     */
    function showErrorMessage(message) {
        var container = document.getElementById('alertContainer');
        if (!container) return;
        container.innerHTML = '<div class="admin-notice notice-error mb-3"><i class="bi bi-exclamation-circle me-2"></i><strong>' + message + '</strong></div>';
    }

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

    /**
     * Format number
     */
    function formatNumber(num) {
        return parseInt(num, 10).toLocaleString('es-ES');
    }

    /**
     * Load page via AJAX
     */
    function loadPage(tableId, page) {
        var config = {
            'top-searches': {
                action: 'roi_apu_paginate_searches',
                bodyId: 'top-searches-body',
                paginationId: 'pagination-searches'
            },
            'top-clicks': {
                action: 'roi_apu_paginate_clicks',
                bodyId: 'top-clicks-body',
                paginationId: 'pagination-clicks'
            },
            'zero-results': {
                action: 'roi_apu_paginate_zero_results',
                bodyId: 'zero-results-body',
                paginationId: 'pagination-zero-results'
            }
        };

        var cfg = config[tableId];
        if (!cfg) {
            console.error('Invalid tableId:', tableId);
            return;
        }

        var tbody = document.getElementById(cfg.bodyId);
        var paginationDiv = document.getElementById(cfg.paginationId);

        if (!tbody) {
            console.error('tbody not found:', cfg.bodyId);
            return;
        }

        // Find the card container and add loading state (keeps size, shows overlay)
        var card = tbody.closest('.card');
        if (card) {
            card.classList.add('is-loading-table');
        }

        // Build form data
        var formData = new FormData();
        formData.append('action', cfg.action);
        formData.append('nonce', window.roiApuDashboardAjax.nonce);
        formData.append('page', page);
        formData.append('days', window.roiApuDashboardData ? window.roiApuDashboardData.period : 30);

        // AJAX request
        fetch(window.roiApuDashboardAjax.ajaxUrl, {
            method: 'POST',
            body: formData,
            credentials: 'same-origin'
        })
        .then(function(response) { return response.json(); })
        .then(function(result) {
            if (result.success && result.data && result.data.data) {
                currentPages[tableId] = page;

                // Render rows based on table type
                var html = '';
                var siteUrl = window.roiApuDashboardData ? window.roiApuDashboardData.siteUrl : '';

                result.data.data.forEach(function(row) {
                    if (tableId === 'top-searches') {
                        var ctrClass = parseFloat(row.ctr) > 0 ? 'bg-success' : 'bg-secondary';
                        html += '<tr><td><strong>' + escapeHtml(row.q_term) + '</strong></td>';
                        html += '<td class="text-center">' + formatNumber(row.busquedas) + '</td>';
                        html += '<td class="text-center">' + formatNumber(row.clicks) + '</td>';
                        html += '<td class="text-center"><span class="badge ' + ctrClass + '">' + escapeHtml(row.ctr) + '%</span></td>';
                        html += '<td class="text-center">' + formatNumber(row.resultados) + '</td></tr>';
                    } else if (tableId === 'top-clicks') {
                        var posClass = parseFloat(row.pos_prom) <= 3 ? 'bg-success' : (parseFloat(row.pos_prom) <= 5 ? 'bg-warning text-dark' : 'bg-secondary');
                        var title = row.post_title.length > 80 ? row.post_title.substring(0, 77) + '...' : row.post_title;
                        html += '<tr><td><strong>' + escapeHtml(title) + '</strong></td>';
                        html += '<td class="text-center">' + formatNumber(row.clicks) + '</td>';
                        html += '<td class="text-center"><span class="badge ' + posClass + '">' + escapeHtml(row.pos_prom) + '</span></td>';
                        html += '<td class="text-center"><div class="btn-group btn-group-sm">';
                        html += '<a href="/wp-admin/post.php?post=' + row.post_id + '&action=edit" target="_blank" class="btn btn-outline-primary"><i class="bi bi-pencil"></i></a>';
                        html += '<a href="' + siteUrl + '/' + row.post_name + '/" target="_blank" class="btn btn-outline-secondary"><i class="bi bi-box-arrow-up-right"></i></a>';
                        html += '</div></td></tr>';
                    } else if (tableId === 'zero-results') {
                        var date = new Date(row.ultima_busqueda);
                        var formattedDate = date.toLocaleDateString('es-ES');
                        html += '<tr><td><strong>' + escapeHtml(row.q_term) + '</strong></td>';
                        html += '<td class="text-center"><span class="badge bg-danger">' + formatNumber(row.frecuencia) + '</span></td>';
                        html += '<td class="text-center"><small class="text-muted">' + formattedDate + '</small></td></tr>';
                    }
                });

                tbody.innerHTML = html;

                // Remove loading state
                if (card) {
                    card.classList.remove('is-loading-table');
                }

                // Update pagination
                if (paginationDiv) {
                    paginationDiv.innerHTML = renderPagination(page, result.data.pages, tableId);
                    bindPaginationEvents(paginationDiv, tableId);
                }
            } else {
                if (card) {
                    card.classList.remove('is-loading-table');
                }
                showErrorMessage('Error al cargar datos');
                console.error('AJAX error:', result);
            }
        })
        .catch(function(error) {
            if (card) {
                card.classList.remove('is-loading-table');
            }
            console.error('Fetch error:', error);
            showErrorMessage('Error de conexión');
        });
    }

    /**
     * Render pagination HTML
     */
    function renderPagination(currentPage, totalPages, tableId) {
        if (totalPages <= 1) return '';

        var html = '<nav class="mt-3"><ul class="pagination justify-content-center mb-0 flex-wrap" data-table="' + tableId + '">';

        // Inicio
        var firstDisabled = currentPage <= 1 ? ' disabled' : '';
        html += '<li class="page-item' + firstDisabled + '"><a class="page-link" href="javascript:void(0)" data-page="1">Inicio</a></li>';

        // Page numbers
        var startPage = Math.max(1, currentPage - 2);
        var endPage = Math.min(totalPages, currentPage + 2);
        if (currentPage <= 2) endPage = Math.min(totalPages, 5);
        if (currentPage >= totalPages - 1) startPage = Math.max(1, totalPages - 4);

        for (var i = startPage; i <= endPage; i++) {
            var active = i === currentPage ? ' active' : '';
            html += '<li class="page-item' + active + '"><a class="page-link" href="javascript:void(0)" data-page="' + i + '">' + i + '</a></li>';
        }

        // Ver más
        if (endPage < totalPages) {
            var nextPage = Math.min(currentPage + 5, totalPages);
            html += '<li class="page-item"><a class="page-link" href="javascript:void(0)" data-page="' + nextPage + '">Ver más</a></li>';
        }

        // Fin
        var lastDisabled = currentPage >= totalPages ? ' disabled' : '';
        html += '<li class="page-item' + lastDisabled + '"><a class="page-link" href="javascript:void(0)" data-page="' + totalPages + '">Fin</a></li>';

        html += '</ul></nav>';
        return html;
    }

    /**
     * Bind click events to pagination links
     */
    function bindPaginationEvents(container, tableId) {
        var links = container.querySelectorAll('a[data-page]');
        links.forEach(function(link) {
            link.onclick = function(e) {
                e.preventDefault();
                e.stopPropagation();
                var page = parseInt(this.getAttribute('data-page'), 10);
                if (page && page !== currentPages[tableId]) {
                    loadPage(tableId, page);
                }
                return false;
            };
        });
    }

    /**
     * Initialize all pagination
     */
    function initPagination() {
        // Bind events to existing pagination containers
        var containers = [
            { id: 'pagination-searches', table: 'top-searches' },
            { id: 'pagination-clicks', table: 'top-clicks' },
            { id: 'pagination-zero-results', table: 'zero-results' }
        ];

        containers.forEach(function(cfg) {
            var container = document.getElementById(cfg.id);
            if (container) {
                bindPaginationEvents(container, cfg.table);
            }
        });
    }

    /**
     * Copy markdown to clipboard
     */
    function copyMarkdown() {
        var data = window.roiApuDashboardData;
        if (!data) {
            showErrorMessage('No hay datos disponibles');
            return;
        }

        var md = '# Reporte Analytics - Buscador APUs\n\n';
        md += '**Período**: Últimos ' + data.period + ' días\n';
        md += '**Generado**: ' + data.generated + '\n\n';
        md += '## Métricas Clave\n\n';
        md += '| Métrica | Valor |\n|---------|-------|\n';
        md += '| Búsquedas | ' + data.kpis.totalBusquedas + ' |\n';
        md += '| CTR | ' + data.kpis.ctr + ' |\n';
        md += '| Sin Resultados | ' + data.kpis.sinResultados + ' |\n';
        md += '| Pos. Promedio | ' + data.kpis.posProm + ' |\n\n';
        md += '*Generado por ROI APU Search Dashboard*\n';

        navigator.clipboard.writeText(md).then(function() {
            showSuccessMessage('Copiado al portapapeles');
        }).catch(function() {
            showErrorMessage('Error al copiar');
        });
    }

    /**
     * Initialize
     */
    function init() {
        initTooltips();
        initPagination();

        var exportBtn = document.getElementById('btn-export-md');
        if (exportBtn) {
            exportBtn.onclick = copyMarkdown;
        }
    }

    // Run when ready
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }

    // Global access for debugging
    window.roiApuDashboard = {
        loadPage: loadPage,
        currentPages: currentPages
    };

})();