window.TableEnhancer = {
    init(selector, options = {}) {
        const defaults = {
            perPage: 10,
            searchable: true,
            sortable: true,
            persistKey: null
        };
        const config = { ...defaults, ...options };
        document.querySelectorAll(selector).forEach(table => this.enhance(table, config));
    },

    enhance(table, config) {
        const container = table.closest('.table-container') || table.parentElement;
        if (!container.querySelector('.table-search')) {
            this.addControls(container, table, config);
        }
        this.setupSearch(container, table, config);
        this.setupSort(container, table, config);
        this.setupPagination(container, table, config);
    },

    addControls(container, table, config) {
        const controls = document.createElement('div');
        controls.className = 'table-controls flex justify-between items-center mb-4 p-4 bg-gray-50 rounded-t-lg';
        controls.innerHTML = `
            ${config.searchable ? `
            <div class="relative">
                <input type="text" class="table-search pl-10 pr-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-primary-500 focus:border-primary-500 w-64" placeholder="Search...">
                <svg class="absolute left-3 top-2.5 h-5 w-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z"/>
                </svg>
            </div>
            ` : ''}
            <div class="table-info text-sm text-gray-500"></div>
        `;
        container.insertBefore(controls, table);

        const pagination = document.createElement('div');
        pagination.className = 'table-pagination flex justify-center items-center space-x-2 mt-4';
        container.appendChild(pagination);
    },

    setupSearch(container, table, config) {
        const searchInput = container.querySelector('.table-search');
        if (!searchInput) return;

        const key = config.persistKey ? `table_search_${config.persistKey}` : null;
        if (key && localStorage.getItem(key)) {
            searchInput.value = localStorage.getItem(key);
        }

        searchInput.addEventListener('input', (e) => {
            if (key) localStorage.setItem(key, e.target.value);
            this.filterTable(table, e.target.value);
            this.updatePagination(container, table, 1, config);
        });
    },

    setupSort(container, table, config) {
        if (!config.sortable) return;

        const headers = table.querySelectorAll('th');
        headers.forEach((th, index) => {
            if (th.textContent.trim()) {
                th.classList.add('cursor-pointer', 'hover:bg-gray-100');
                th.dataset.sortCol = index;
                th.innerHTML += `
                    <svg class="inline h-4 w-4 ml-1 text-gray-400 sort-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 16V4m0 0L3 8m4-4l4 4m6 0v12m0 0l4-4m-4 4l-4-4"/>
                    </svg>
                `;
            }
        });

        container.querySelectorAll('th[data-sort-col]').forEach(th => {
            th.addEventListener('click', () => {
                const col = th.dataset.sortCol;
                const currentSort = th.dataset.sort || 'none';
                const newSort = currentSort === 'asc' ? 'desc' : 'asc';
                this.sortTable(table, col, newSort);
                th.dataset.sort = newSort;
                th.querySelector('.sort-icon').innerHTML = newSort === 'asc'
                    ? '<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 15l7-7 7 7"/>'
                    : '<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/>';
            });
        });
    },

    setupPagination(container, table, config) {
        this.updatePagination(container, table, 1, config);
    },

    filterTable(table, query) {
        const rows = table.querySelectorAll('tbody tr');
        const lowerQuery = query.toLowerCase();
        let visibleCount = 0;

        rows.forEach(row => {
            const text = row.textContent.toLowerCase();
            const match = text.includes(lowerQuery);
            row.style.display = match ? '' : 'none';
            if (match) visibleCount++;
        });

        const infoEl = container.querySelector('.table-info');
        if (infoEl) {
            infoEl.textContent = `${visibleCount} row${visibleCount !== 1 ? 's' : ''} found`;
        }
    },

    sortTable(table, col, direction) {
        const tbody = table.querySelector('tbody');
        const rows = Array.from(tbody.querySelectorAll('tr'));

        rows.sort((a, b) => {
            const aVal = a.querySelectorAll('td')[col]?.textContent.trim() || '';
            const bVal = b.querySelectorAll('td')[col]?.textContent.trim() || '';
            const aNum = parseFloat(aVal);
            const bNum = parseFloat(bVal);

            if (!isNaN(aNum) && !isNaN(bNum)) {
                return direction === 'asc' ? aNum - bNum : bNum - aNum;
            }
            return direction === 'asc'
                ? aVal.localeCompare(bVal)
                : bVal.localeCompare(aVal);
        });

        rows.forEach(row => tbody.appendChild(row));
    },

    updatePagination(container, table, page, config) {
        const rows = Array.from(table.querySelectorAll('tbody tr:not([style*=\"display: none\"])'));
        const totalPages = Math.ceil(rows.length / config.perPage);
        const pagination = container.querySelector('.table-pagination');
        if (!pagination) return;

        const start = (page - 1) * config.perPage;
        const end = start + config.perPage;

        rows.forEach((row, index) => {
            row.style.display = index >= start && index < end ? '' : 'none';
        });

        if (totalPages <= 1) {
            pagination.innerHTML = '';
            return;
        }

        let html = `
            <button class="px-3 py-1 border rounded hover:bg-gray-100" ${page === 1 ? 'disabled' : ''} onclick="TableEnhancer.goToPage('${container.querySelector('table').id || ''}', ${page - 1})">Prev</button>
        `;

        for (let i = 1; i <= totalPages; i++) {
            if (i === 1 || i === totalPages || (i >= page - 1 && i <= page + 1)) {
                html += `<button class="px-3 py-1 border rounded ${i === page ? 'bg-primary-600 text-white' : 'hover:bg-gray-100'}" onclick="TableEnhancer.goToPage('${container.querySelector('table').id || ''}', ${i})">${i}</button>`;
            } else if (i === page - 2 || i === page + 2) {
                html += `<span class="px-2">...</span>`;
            }
        }

        html += `
            <button class="px-3 py-1 border rounded hover:bg-gray-100" ${page === totalPages ? 'disabled' : ''} onclick="TableEnhancer.goToPage('${container.querySelector('table').id || ''}', ${page + 1})">Next</button>
        `;

        pagination.innerHTML = html;
    },

    goToPage(tableId, page) {
        const table = tableId ? document.getElementById(tableId) : document.querySelector('table');
        if (!table) return;
        const container = table.closest('.table-container') || table.parentElement;
        const config = { perPage: 10 };
        this.updatePagination(container, table, page, config);
    },

    goToPageBySelector(selector, page) {
        const container = document.querySelector(selector);
        if (!container) return;
        const table = container.querySelector('table');
        if (!table) return;
        const config = { perPage: 10 };
        this.updatePagination(container, table, page, config);
    }
};