/* ============================================
   CONFIG (vem do PHP via window.FM_CONFIG)
   ============================================ */
const BASE_URL = window.FM_CONFIG?.baseUrl || '?dir=';

/* ============================================
   ESTADO GLOBAL
   ============================================ */
let selectedItems = new Set();
let currentCopyAction = 'copy_to';
let editorOriginalContent = '';

/* ============================================
   NAVEGAÇÃO ENTRE TABS
   ============================================ */
function showTab(id, btn) {
    document.querySelectorAll('.tab-content').forEach(t => t.classList.remove('active'));
    document.querySelectorAll('.tab-button').forEach(b => b.classList.remove('active'));
    document.getElementById(id).classList.add('active');
    if (btn) btn.classList.add('active');
}

/* ============================================
   MODAIS
   ============================================ */
function openModal(id) { document.getElementById(id).classList.add('active'); }
function closeModal(id) { document.getElementById(id).classList.remove('active'); }

document.addEventListener('click', function(e) {
    if (e.target.classList.contains('modal')) {
        e.target.classList.remove('active');
    }
});

document.addEventListener('keydown', function(e) {
    if (e.key === 'Escape') {
        document.querySelectorAll('.modal.active').forEach(m => m.classList.remove('active'));
    }
});

/* ============================================
   SELEÇÃO MÚLTIPLA
   ============================================ */
function toggleSelectAll(src) {
    document.querySelectorAll('.item-checkbox').forEach(cb => {
        cb.checked = src.checked;
        if (src.checked) selectedItems.add(cb.value);
        else selectedItems.delete(cb.value);
    });
    updateSelectionBar();
    updateRowHighlight();
}

function toggleItem(cb) {
    if (cb.checked) selectedItems.add(cb.value);
    else selectedItems.delete(cb.value);
    updateSelectionBar();
    updateRowHighlight();
    updateSelectAll();
}

function updateSelectAll() {
    const all = document.querySelectorAll('.item-checkbox');
    const sa = document.getElementById('select-all');
    if (!sa) return;
    sa.checked = all.length > 0 && selectedItems.size === all.length;
    sa.indeterminate = selectedItems.size > 0 && selectedItems.size < all.length;
}

function updateSelectionBar() {
    const bar = document.getElementById('selection-bar');
    const counter = document.getElementById('selection-count');
    if (!bar) return;
    if (counter) counter.textContent = selectedItems.size;
    bar.classList.toggle('active', selectedItems.size > 0);
}

function updateRowHighlight() {
    document.querySelectorAll('.file-row').forEach(row => {
        const cb = row.querySelector('.item-checkbox');
        row.classList.toggle('selected', cb && cb.checked);
    });
}

/* ============================================
   AÇÕES EM LOTE
   ============================================ */
function downloadSelected() {
    if (selectedItems.size === 0) return alert('Selecione itens');
    document.getElementById('download-items-input').value = Array.from(selectedItems).join(',');
    document.getElementById('download-form').submit();
}

function compressSelected() {
    if (selectedItems.size === 0) return alert('Selecione itens');
    if (!confirm('Compactar ' + selectedItems.size + ' item(ns)?')) return;
    document.getElementById('compress-items-input').value = Array.from(selectedItems).join(',');
    document.getElementById('compress-form').submit();
}

function deleteSelected() {
    if (selectedItems.size === 0) return alert('Selecione itens');
    if (!confirm('Deletar ' + selectedItems.size + ' item(ns)? Esta ação não pode ser desfeita!')) return;
    document.getElementById('delete-items-input').value = Array.from(selectedItems).join(',');
    document.getElementById('delete-form').submit();
}

/* ============================================
   COPIAR / MOVER
   ============================================ */
function openCopyModal(action) {
    if (selectedItems.size === 0) return alert('Selecione itens');
    currentCopyAction = action;
    document.getElementById('copy-modal-title').textContent =
        action === 'copy_to' ? '📋 Copiar para' : '📦 Mover para';
    document.getElementById('copy-action-input').value = action;
    document.getElementById('copy-items-input').value = Array.from(selectedItems).join(',');
    document.getElementById('copy-dest-field').value = '';
    document.getElementById('copy-selected').textContent = '/';
    openModal('modal-copy');
}

function pickTreeDir(path, el) {
    document.getElementById('copy-dest-field').value = path;
    document.getElementById('copy-selected').textContent = path || '/';
}

function submitCopy() {
    const dest = document.getElementById('copy-dest-field').value.trim();
    document.getElementById('copy-dest-input').value = dest;
    document.getElementById('copy-form').submit();
}

/* ============================================
   RENOMEAR
   ============================================ */
function renameItem(name) {
    document.getElementById('rename-old').value = name;
    document.getElementById('rename-new').value = name;
    openModal('modal-rename');
    setTimeout(() => {
        const inp = document.getElementById('rename-new');
        inp.focus();
        const dot = name.lastIndexOf('.');
        if (dot > 0) inp.setSelectionRange(0, dot);
        else inp.select();
    }, 100);
}

/* ============================================
   CHMOD
   ============================================ */
function chmodItem(name, current) {
    document.getElementById('chmod-item').value = name;
    document.getElementById('chmod-mode').value = current;
    openModal('modal-chmod');
}

/* ============================================
   VISUALIZAR IMAGEM
   ============================================ */
function openImage(name) {
    document.getElementById('image-title').textContent = '🖼️ ' + name;
    document.getElementById('image-preview').src = BASE_URL + '&raw=' + encodeURIComponent(name);
    openModal('modal-image');
}

/* ============================================
   EDITOR DE CÓDIGO
   ============================================ */
function openEditor(name) {
    document.getElementById('editor-title').textContent = '✏️ ' + name;
    document.getElementById('editor-filename').value = name;
    document.getElementById('editor-textarea').value = 'Carregando...';
    document.getElementById('editor-info').textContent = '';
    openModal('modal-editor');

    fetch(BASE_URL + '&raw=' + encodeURIComponent(name) + '&_t=' + Date.now())
        .then(r => {
            if (!r.ok) throw new Error('HTTP ' + r.status);
            return r.text();
        })
        .then(text => {
            editorOriginalContent = text;
            const ta = document.getElementById('editor-textarea');
            ta.value = text;
            updateLineNumbers();
            document.getElementById('editor-info').textContent =
                'Linhas: ' + text.split('\n').length +
                ' | Caracteres: ' + text.length;
        })
        .catch(err => {
            document.getElementById('editor-textarea').value =
                '// Erro ao carregar arquivo: ' + err.message;
            document.getElementById('editor-info').textContent = '❌ Falha ao carregar';
        });
}

function updateLineNumbers() {
    const ta = document.getElementById('editor-textarea');
    const lines = ta.value.split('\n').length;
    let html = '';
    for (let i = 1; i <= lines; i++) html += i + '\n';
    document.getElementById('line-numbers').textContent = html;
}

function syncScroll() {
    const ta = document.getElementById('editor-textarea');
    const ln = document.getElementById('line-numbers');
    if (ln) ln.scrollTop = ta.scrollTop;
}

document.addEventListener('DOMContentLoaded', function() {
    const ta = document.getElementById('editor-textarea');
    if (!ta) return;

    ta.addEventListener('keydown', function(e) {
        if ((e.ctrlKey || e.metaKey) && e.key === 's') {
            e.preventDefault();
            document.getElementById('editor-form').submit();
        }
        if (e.key === 'Tab') {
            e.preventDefault();
            const start = this.selectionStart;
            const end = this.selectionEnd;
            this.value = this.value.substring(0, start) + '\t' + this.value.substring(end);
            this.selectionStart = this.selectionEnd = start + 1;
            updateLineNumbers();
        }
    });
});

/* ============================================
   UTILITÁRIOS
   ============================================ */
function copyPath(path) {
    navigator.clipboard.writeText(path).then(() => {
        const btn = event.target;
        const old = btn.textContent;
        btn.textContent = '✅';
        setTimeout(() => btn.textContent = old, 1000);
    });
}

function filterRows(query) {
    query = query.toLowerCase().trim();
    document.querySelectorAll('.file-row').forEach(row => {
        const name = row.getAttribute('data-name') || '';
        row.style.display = (!query || name.includes(query)) ? '' : 'none';
    });
}

function toggleTreeNode(el) {
    const div = el.nextElementSibling;
    if (div && div.tagName === 'DIV' && div.classList.contains('tree-children')) {
        div.style.display = div.style.display === 'none' ? 'block' : 'none';
    }
}

/* ============================================
   INICIALIZAÇÃO
   ============================================ */
window.addEventListener('load', function() {
    updateSelectionBar();
    updateSelectAll();
});