let currentFileId = null;
let currentView = 'grid';
let uploadQueue = [];
let selectedFiles = new Set();
let draggedFileId = null;
let currentShareFileId = null;

document.addEventListener('DOMContentLoaded', function() {
    setupEventListeners();
    setupContextMenu();
    setupDragDrop();
    setupNewButton();
    setupFolderDialog();
    setupFileDragDrop();
    setupFileSelection();
});

function setupEventListeners() {
    const searchInput = document.getElementById('searchInput');
    if (searchInput) searchInput.addEventListener('input', handleSearch);

    document.addEventListener('keydown', function(e) {
        if (e.key === 'Escape') {
            closeModal(); 
            closeFolderDialog(); 
            closeShareDialog();
            closeWebFetchDialog();
            hideContextMenu(); 
            hideNewDropdown();
            clearSelection();
        }
    });

    const fileModal = document.getElementById('fileModal');
    if (fileModal) fileModal.addEventListener('click', function(e) {
        if (e.target === fileModal) closeModal();
    });

    const folderModal = document.getElementById('folderModal');
    if (folderModal) folderModal.addEventListener('click', function(e) {
        if (e.target === folderModal) closeFolderDialog();
    });

    const shareModal = document.getElementById('shareModal');
    if (shareModal) shareModal.addEventListener('click', function(e) {
        if (e.target === shareModal) closeShareDialog();
    });

    const webFetchModal = document.getElementById('webFetchModal');
    if (webFetchModal) webFetchModal.addEventListener('click', function(e) {
        if (e.target === webFetchModal) closeWebFetchDialog();
    });

    const urlInput = document.getElementById('webFetchUrlInput');
    const nameInput = document.getElementById('webFetchNameInput');

    if (urlInput) {
        urlInput.addEventListener('keypress', function(e) {
            if (e.key === 'Enter') downloadFromWeb();
        });
    }

    if (nameInput) {
        nameInput.addEventListener('keypress', function(e) {
            if (e.key === 'Enter') downloadFromWeb();
        });
    }
}

function setupFileSelection() {
    document.addEventListener('click', function(e) {
        if (!e.target.closest('.file-item') && !e.ctrlKey && !e.metaKey) {
            clearSelection();
        }
    });
}

function selectFile(event, fileId) {
    event.stopPropagation();

    const fileItem = document.querySelector(`[data-file-id="${fileId}"]`);
    if (!fileItem) return;

    if (event.ctrlKey || event.metaKey) {
        if (selectedFiles.has(fileId)) {
            selectedFiles.delete(fileId);
            fileItem.classList.remove('selected');
        } else {
            selectedFiles.add(fileId);
            fileItem.classList.add('selected');
        }
    } else if (event.shiftKey && selectedFiles.size > 0) {
        const allFiles = Array.from(document.querySelectorAll('.file-item'));
        const lastSelected = Array.from(selectedFiles)[selectedFiles.size - 1];
        const lastIndex = allFiles.findIndex(f => f.dataset.fileId === lastSelected);
        const currentIndex = allFiles.findIndex(f => f.dataset.fileId === fileId);

        const start = Math.min(lastIndex, currentIndex);
        const end = Math.max(lastIndex, currentIndex);

        for (let i = start; i <= end; i++) {
            const id = allFiles[i].dataset.fileId;
            selectedFiles.add(id);
            allFiles[i].classList.add('selected');
        }
    } else {
        clearSelection();
        selectedFiles.add(fileId);
        fileItem.classList.add('selected');
    }

    updateSelectionUI();
}

function clearSelection() {
    selectedFiles.clear();
    document.querySelectorAll('.file-item.selected').forEach(item => {
        item.classList.remove('selected');
    });
    updateSelectionUI();
}

function updateSelectionUI() {
    const count = selectedFiles.size;
    const countElement = document.getElementById('selectedCount');
    const deleteBtn = document.getElementById('deleteSelectedBtn');
    const shareBtn = document.getElementById('shareSelectedBtn');

    if (countElement) {
        if (count > 0) {
            countElement.textContent = `${count} selected`;
            countElement.classList.add('show');
        } else {
            countElement.classList.remove('show');
        }
    }

    if (deleteBtn) {
        if (count > 0) {
            deleteBtn.classList.add('show');
            deleteBtn.style.display = 'flex';
        } else {
            deleteBtn.classList.remove('show');
            deleteBtn.style.display = 'none';
        }
    }

    if (shareBtn) {
        if (count > 0) {
            shareBtn.classList.add('show');
            shareBtn.style.display = 'inline-flex';
        } else {
            shareBtn.classList.remove('show');
            shareBtn.style.display = 'none';
        }
    }
}

function deleteSelectedFiles() {
    if (selectedFiles.size === 0) return;

    if (confirm(`Move ${selectedFiles.size} item(s) to trash?`)) {
        const fileIds = Array.from(selectedFiles);

        Promise.all(fileIds.map(fileId => {
            return fetch('trash.php', {
                method: 'POST',
                headers: {'Content-Type': 'application/x-www-form-urlencoded'},
                body: 'fileId=' + fileId
            }).then(r => r.json());
        })).then(() => {
            showToast(`${fileIds.length} item(s) moved to trash`);
            setTimeout(() => location.reload(), 500);
        });
    }
}

function setupFileDragDrop() {
    document.querySelectorAll('.file-item').forEach(item => {
        item.addEventListener('dragstart', handleDragStart);
        item.addEventListener('dragend', handleDragEnd);

        if (item.classList.contains('folder-item')) {
            item.addEventListener('dragover', handleDragOver);
            item.addEventListener('dragleave', handleDragLeave);
            item.addEventListener('drop', handleDrop);
        }
    });
}

function handleDragStart(e) {
    draggedFileId = this.dataset.fileId;
    this.classList.add('dragging');
    e.dataTransfer.effectAllowed = 'move';
    e.dataTransfer.setData('text/html', this.innerHTML);
}

function handleDragEnd(e) {
    this.classList.remove('dragging');
    document.querySelectorAll('.folder-item').forEach(folder => {
        folder.classList.remove('drag-over');
    });
}

function handleDragOver(e) {
    if (e.preventDefault) e.preventDefault();
    e.dataTransfer.dropEffect = 'move';

    if (!this.classList.contains('dragging')) {
        this.classList.add('drag-over');
    }
    return false;
}

function handleDragLeave(e) {
    this.classList.remove('drag-over');
}

function handleDrop(e) {
    if (e.stopPropagation) e.stopPropagation();
    e.preventDefault();

    this.classList.remove('drag-over');
    const targetFolderId = this.dataset.fileId;

    if (draggedFileId && draggedFileId !== targetFolderId) {
        moveFileToFolder(draggedFileId, targetFolderId);
    }

    return false;
}

function moveFileToFolder(fileId, folderId) {
    fetch('move_to_folder.php', {
        method: 'POST',
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        body: `fileId=${fileId}&folderId=${folderId}`
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            showToast('File moved to folder');
            setTimeout(() => location.reload(), 500);
        } else {
            showToast('Failed to move file');
        }
    })
    .catch(error => {
        console.error('Error:', error);
        showToast('Error moving file');
    });
}

function setupNewButton() {
    const newButton = document.getElementById('newButton');
    const newDropdown = document.getElementById('newDropdown');
    if (newButton && newDropdown) {
        newButton.addEventListener('click', function(e) {
            e.stopPropagation();
            newDropdown.classList.toggle('show');
        });
        document.addEventListener('click', function() {
            newDropdown.classList.remove('show');
        });
    }
}

function hideNewDropdown() {
    const newDropdown = document.getElementById('newDropdown');
    if (newDropdown) newDropdown.classList.remove('show');
}

function triggerFileUpload() {
    hideNewDropdown();
    document.getElementById('fileInput').click();
}

function triggerFolderUpload() {
    hideNewDropdown();
    document.getElementById('folderInput').click();
}

function setupFolderDialog() {
    const folderInput = document.getElementById('folderNameInput');
    const createBtn = document.getElementById('createFolderBtn');
    if (folderInput && createBtn) {
        folderInput.addEventListener('input', function() {
            createBtn.disabled = this.value.trim() === '';
        });
        folderInput.addEventListener('keypress', function(e) {
            if (e.key === 'Enter' && this.value.trim() !== '') createFolder();
        });
    }
}

function showFolderDialog() {
    hideNewDropdown();
    const modal = document.getElementById('folderModal');
    const input = document.getElementById('folderNameInput');
    const createBtn = document.getElementById('createFolderBtn');
    if (modal && input) {
        modal.classList.add('show');
        input.value = '';
        input.focus();
        createBtn.disabled = true;
    }
}

function closeFolderDialog() {
    const modal = document.getElementById('folderModal');
    if (modal) modal.classList.remove('show');
}

function createFolder() {
    const input = document.getElementById('folderNameInput');
    const folderName = input.value.trim();

    if (!folderName) {
        showToast('Please enter a folder name');
        return;
    }

    const currentFolder = window.currentFolder || 'root';

    fetch('create_folder.php', {
        method: 'POST',
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        body: `folderName=${encodeURIComponent(folderName)}&parentFolder=${encodeURIComponent(currentFolder)}`
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            closeFolderDialog();
            showToast('Folder created: ' + folderName);
            setTimeout(() => location.reload(), 500);
        } else {
            showToast('Failed to create folder: ' + (data.error || 'Unknown error'));
        }
    })
    .catch(error => {
        console.error('Error:', error);
        showToast('Error creating folder');
    });
}

function setupContextMenu() {
    const fileItems = document.querySelectorAll('.file-item');
    const mainContent = document.getElementById('mainContent');

    fileItems.forEach(item => {
        item.addEventListener('contextmenu', function(e) {
            e.preventDefault();
            showFileContextMenu(e, this);
        });
    });

    if (mainContent) {
        mainContent.addEventListener('contextmenu', function(e) {
            if (e.target === mainContent || e.target.classList.contains('file-grid')) {
                e.preventDefault();
                showEmptyContextMenu(e);
            }
        });
    }

    document.addEventListener('click', function() {
        hideContextMenu();
    });
}

function showFileContextMenu(event, fileElement) {
    hideContextMenu();
    const menu = document.getElementById('fileContextMenu');
    currentFileId = fileElement.dataset.fileId;
    const isStarred = fileElement.dataset.starred === 'true';
    const starMenuText = document.getElementById('starMenuText');
    const starMenuItem = document.getElementById('starMenuItem');

    if (isStarred) {
        starMenuText.textContent = 'Remove from starred';
        starMenuItem.querySelector('.material-icons').textContent = 'star_outline';
    } else {
        starMenuText.textContent = 'Add to starred';
        starMenuItem.querySelector('.material-icons').textContent = 'star';
    }

    positionContextMenu(menu, event.clientX, event.clientY);
    menu.classList.add('show');
}

function showEmptyContextMenu(event) {
    hideContextMenu();
    const menu = document.getElementById('emptyContextMenu');
    positionContextMenu(menu, event.clientX, event.clientY);
    menu.classList.add('show');
}

function positionContextMenu(menu, x, y) {
    menu.style.left = x + 'px';
    menu.style.top = y + 'px';
    setTimeout(() => {
        const rect = menu.getBoundingClientRect();
        if (rect.right > window.innerWidth) menu.style.left = (x - rect.width) + 'px';
        if (rect.bottom > window.innerHeight) menu.style.top = (y - rect.height) + 'px';
    }, 0);
}

function hideContextMenu() {
    document.querySelectorAll('.context-menu').forEach(menu => {
        menu.classList.remove('show');
    });
}

function contextMenuAction(action) {
    hideContextMenu();
    const fileElement = document.querySelector(`[data-file-id="${currentFileId}"]`);
    if (!fileElement) return;

    const filePath = fileElement.dataset.filePath;
    const fileName = fileElement.dataset.fileName;
    const fileType = fileElement.dataset.fileType;

    switch(action) {
        case 'open':
        case 'preview':
            if (fileType === 'folder') {
                window.location.href = `index.php?view=my-drive&folder=${currentFileId}`;
            } else {
                openFile(filePath, fileName, fileType, currentFileId);
            }
            break;
        case 'download':
            downloadFile(filePath, fileName);
            break;
        case 'rename':
            renameFile(currentFileId, fileName);
            break;
        case 'copy':
            copyFile(currentFileId);
            break;
        case 'star':
            toggleStar(currentFileId);
            break;
        case 'trash':
            moveToTrash(currentFileId);
            break;
        case 'share':
            if (currentFileId) {
                const fileElement = document.querySelector(`[data-file-id="${currentFileId}"]`);
                if (fileElement) {
                    const fileName = fileElement.dataset.fileName;
                    hideContextMenu();
                    showShareDialog(currentFileId, fileName);
                }
            }
            break;
    }
}

function emptyContextAction(action) {
    hideContextMenu();
    switch(action) {
        case 'upload':
            triggerFileUpload();
            break;
        case 'folder':
            showFolderDialog();
            break;
        case 'refresh':
            location.reload();
            break;
    }
}

function setupDragDrop() {
    const mainContent = document.getElementById('mainContent');
    const dragOverlay = document.getElementById('dragOverlay');
    let dragCounter = 0;

    if (!mainContent || !dragOverlay) return;

    document.addEventListener('dragenter', function(e) {
        if (e.dataTransfer.types.includes('Files')) {
            e.preventDefault();
            dragCounter++;
            if (dragCounter === 1) dragOverlay.classList.add('show');
        }
    });

    document.addEventListener('dragleave', function(e) {
        if (e.dataTransfer.types.includes('Files')) {
            e.preventDefault();
            dragCounter--;
            if (dragCounter === 0) dragOverlay.classList.remove('show');
        }
    });

    document.addEventListener('dragover', function(e) {
        if (e.dataTransfer.types.includes('Files')) {
            e.preventDefault();
        }
    });

    document.addEventListener('drop', function(e) {
        if (e.dataTransfer.files.length > 0) {
            e.preventDefault();
            dragCounter = 0;
            dragOverlay.classList.remove('show');
            const files = e.dataTransfer.files;
            if (files.length > 0) handleFilesUpload(files);
        }
    });
}

function handleFilesUpload(files) {
    uploadQueue = Array.from(files);
    showUploadProgress();
    uploadFiles();
}

function showUploadProgress() {
    const progress = document.getElementById('uploadProgress');
    const statusText = document.getElementById('uploadStatusText');
    const fileList = document.getElementById('uploadFileList');

    if (!progress || !statusText || !fileList) return;

    progress.classList.add('show');
    statusText.textContent = `Uploading ${uploadQueue.length} file${uploadQueue.length > 1 ? 's' : ''}`;
    fileList.innerHTML = '';

    uploadQueue.forEach((file, index) => {
        const fileItem = document.createElement('div');
        fileItem.className = 'upload-file-item';
        fileItem.id = 'upload-file-' + index;
        fileItem.innerHTML = `
            <span class="material-icons file-icon">insert_drive_file</span>
            <div class="file-info-upload">
                <div class="file-name-upload">${file.name}</div>
                <div class="file-progress">
                    <div class="file-progress-fill" id="progress-${index}" style="width: 0%"></div>
                </div>
                <div class="file-status" id="status-${index}">Waiting...</div>
            </div>
        `;
        fileList.appendChild(fileItem);
    });
}

function uploadFiles() {
    let completed = 0;
    let totalSize = uploadQueue.reduce((sum, file) => sum + file.size, 0);
    const currentFolder = window.currentFolder || 'root';

    uploadQueue.forEach((file, index) => {
        const xhr = new XMLHttpRequest();
        const formData = new FormData();
        formData.append('files[]', file);
        formData.append('targetFolder', currentFolder);

        xhr.upload.addEventListener('progress', function(e) {
            if (e.lengthComputable) {
                const percent = Math.round((e.loaded / e.total) * 100);
                const progressBar = document.getElementById('progress-' + index);
                const status = document.getElementById('status-' + index);

                if (progressBar) progressBar.style.width = percent + '%';
                if (status) {
                    const speed = formatBytes(e.loaded / ((Date.now() - xhr.startTime) / 1000)) + '/s';
                    status.textContent = `${percent}% • ${speed}`;
                }

                const currentUploadedSize = uploadQueue.slice(0, index).reduce((sum, f) => sum + f.size, 0) + e.loaded;
                const overallPercent = Math.round((currentUploadedSize / totalSize) * 100);
                updateOverallProgress(overallPercent);
            }
        });

        xhr.addEventListener('load', function() {
            completed++;
            const status = document.getElementById('status-' + index);

            if (xhr.status === 200) {
                if (status) {
                    status.textContent = 'Complete';
                    status.classList.add('complete');
                }
                try {
                    const response = JSON.parse(xhr.responseText);
                    if (response.storageUsed && response.storageQuota) {
                        updateStorageBar(response.storageUsed, response.storageQuota);
                    }
                } catch (e) {}
            } else {
                if (status) {
                    status.textContent = 'Failed';
                    status.classList.add('error');
                }
            }

            if (completed === uploadQueue.length) {
                setTimeout(() => {
                    closeUploadProgress();
                    showToast('Upload complete');
                    location.reload();
                }, 2000);
            }
        });

        xhr.addEventListener('error', function() {
            const status = document.getElementById('status-' + index);
            if (status) {
                status.textContent = 'Failed';
                status.classList.add('error');
            }
        });

        xhr.startTime = Date.now();
        xhr.open('POST', 'index.php');
        xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
        xhr.send(formData);
    });
}

function updateOverallProgress(percent) {
    const progressBar = document.getElementById('overallProgress');
    const progressText = document.getElementById('overallProgressText');
    if (progressBar) progressBar.style.width = percent + '%';
    if (progressText) progressText.textContent = percent + '%';
}

function closeUploadProgress() {
    const progress = document.getElementById('uploadProgress');
    if (progress) progress.classList.remove('show');
    uploadQueue = [];
}

function minimizeUploadProgress() {
    closeUploadProgress();
}

function updateStorageBar(used, quota) {
    const percentage = (used / quota) * 100;
    const storageUsed = document.querySelector('.storage-used');
    const storageText = document.querySelectorAll('.storage-text')[1];

    if (storageUsed) {
        storageUsed.style.width = Math.min(percentage, 100) + '%';
        if (percentage >= 95) storageUsed.style.backgroundColor = '#ea4335';
        else if (percentage >= 80) storageUsed.style.backgroundColor = '#f9ab00';
        else storageUsed.style.backgroundColor = '#1a73e8';
    }

    if (storageText) {
        storageText.textContent = formatBytes(used) + ' of ' + formatBytes(quota) + ' used';
    }
}

function openFile(filePath, fileName, mimeType, fileId) {
    fetch('update_accessed.php', {
        method: 'POST',
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        body: 'fileId=' + fileId
    });

    const modal = document.getElementById('fileModal');
    const modalTitle = document.getElementById('modalTitle');
    const modalBody = document.getElementById('modalBody');

    modalTitle.textContent = fileName;
    modalBody.innerHTML = '';

    if (mimeType.startsWith('image/')) {
        const img = document.createElement('img');
        img.src = filePath;
        img.alt = fileName;
        modalBody.appendChild(img);
    } else if (mimeType === 'application/pdf') {
        const iframe = document.createElement('iframe');
        iframe.src = filePath + '#toolbar=1';
        modalBody.appendChild(iframe);
    } else if (mimeType.startsWith('video/')) {
        const video = document.createElement('video');
        video.src = filePath;
        video.controls = true;
        video.autoplay = false;
        video.style.width = '100%';
        video.style.maxHeight = '70vh';
        modalBody.appendChild(video);
    } else if (mimeType.startsWith('audio/')) {
        const audio = document.createElement('audio');
        audio.src = filePath;
        audio.controls = true;
        modalBody.appendChild(audio);
    } else if (mimeType.startsWith('text/')) {
        fetch(filePath).then(response => response.text()).then(text => {
            const pre = document.createElement('pre');
            pre.textContent = text;
            modalBody.appendChild(pre);
        });
    } else {
        const container = document.createElement('div');
        container.style.textAlign = 'center';
        container.style.padding = '40px';

        const p = document.createElement('p');
        p.textContent = 'Preview not available for this file type.';
        p.style.marginBottom = '20px';

        const downloadBtn = document.createElement('a');
        downloadBtn.href = filePath;
        downloadBtn.download = fileName;
        downloadBtn.textContent = 'Download File';
        downloadBtn.className = 'button-primary';
        downloadBtn.style.textDecoration = 'none';

        container.appendChild(p);
        container.appendChild(downloadBtn);
        modalBody.appendChild(container);
    }

    modal.classList.add('show');
}

function closeModal() {
    const modal = document.getElementById('fileModal');
    if (modal) {
        modal.classList.remove('show');
        const videos = modal.querySelectorAll('video');
        videos.forEach(v => v.pause());
    }
}

function downloadFile(filePath, fileName) {
    const link = document.createElement('a');
    link.href = filePath;
    link.download = fileName;
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
    showToast('Download started');
}

function toggleStar(fileId, event) {
    if (event) event.stopPropagation();

    fetch('star.php', {
        method: 'POST',
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        body: 'fileId=' + fileId
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            showToast(data.starred ? 'Added to starred' : 'Removed from starred');
            setTimeout(() => location.reload(), 500);
        }
    });
}

function moveToTrash(fileId) {
    if (confirm('Move this item to trash?')) {
        fetch('trash.php', {
            method: 'POST',
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            body: 'fileId=' + fileId
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showToast('Moved to trash');
                setTimeout(() => location.reload(), 500);
            }
        });
    }
}

function restoreSelected() {
    if (selectedFiles.size === 0) {
        const firstFile = document.querySelector('.file-item');
        if (firstFile) selectedFiles.add(firstFile.dataset.fileId);
    }

    if (selectedFiles.size === 0) return;

    Promise.all(Array.from(selectedFiles).map(fileId => {
        return fetch('restore.php', {
            method: 'POST',
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            body: 'fileId=' + fileId
        }).then(r => r.json());
    })).then(() => {
        showToast('File(s) restored');
        setTimeout(() => location.reload(), 500);
    });
}

function deleteForeverSelected() {
    if (selectedFiles.size === 0) {
        const firstFile = document.querySelector('.file-item');
        if (firstFile) selectedFiles.add(firstFile.dataset.fileId);
    }

    if (selectedFiles.size === 0) return;

    if (confirm(`Delete ${selectedFiles.size} item(s) forever? You cannot undo this action.`)) {
        const fileIds = Array.from(selectedFiles);
        fetch('delete.php', {
            method: 'POST',
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            body: 'fileIds=' + JSON.stringify(fileIds)
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showToast(`${data.deletedCount} item(s) deleted forever`);
                setTimeout(() => location.reload(), 500);
            }
        });
    }
}

function emptyTrash() {
    if (confirm('Empty trash? All items will be deleted forever. You cannot undo this action.')) {
        fetch('empty_trash.php', {
            method: 'POST'
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showToast('Trash emptied');
                setTimeout(() => location.reload(), 500);
            }
        });
    }
}

function renameFile(fileId, currentName) {
    const newName = prompt('Rename file:', currentName);
    if (newName && newName !== currentName) {
        fetch('rename.php', {
            method: 'POST',
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            body: 'fileId=' + fileId + '&newName=' + encodeURIComponent(newName)
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showToast('File renamed');
                setTimeout(() => location.reload(), 500);
            }
        });
    }
}

function copyFile(fileId) {
    fetch('copy.php', {
        method: 'POST',
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        body: 'fileId=' + fileId
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            showToast('File copied');
            setTimeout(() => location.reload(), 500);
        }
    });
}

function toggleView(view) {
    currentView = view;
    const gridBtn = document.getElementById('gridViewBtn');
    const listBtn = document.getElementById('listViewBtn');

    if (view === 'grid') {
        gridBtn.classList.add('active');
        listBtn.classList.remove('active');
    } else {
        listBtn.classList.add('active');
        gridBtn.classList.remove('active');
    }
}

function handleSearch(e) {
    const searchTerm = e.target.value.toLowerCase();
    const fileItems = document.querySelectorAll('.file-item');

    fileItems.forEach(item => {
        const fileName = item.dataset.fileName.toLowerCase();
        if (fileName.includes(searchTerm)) {
            item.style.display = '';
        } else {
            item.style.display = 'none';
        }
    });
}

function showToast(message) {
    const toast = document.getElementById('toast');
    if (toast) {
        toast.textContent = message;
        toast.classList.add('show');
        setTimeout(() => {
            toast.classList.remove('show');
        }, 3000);
    }
}

function formatBytes(bytes) {
    if (bytes >= 1073741824) return (bytes / 1073741824).toFixed(2) + ' GB';
    else if (bytes >= 1048576) return (bytes / 1048576).toFixed(2) + ' MB';
    else if (bytes >= 1024) return (bytes / 1024).toFixed(2) + ' KB';
    else return bytes + ' bytes';
}

const fileInput = document.getElementById('fileInput');
const folderInput = document.getElementById('folderInput');

if (fileInput) {
    fileInput.addEventListener('change', function() {
        if (this.files.length > 0) handleFilesUpload(this.files);
    });
}

if (folderInput) {
    folderInput.addEventListener('change', function() {
        if (this.files.length > 0) handleFilesUpload(this.files);
    });
}

// =====================================================
// WEB FETCH FEATURE
// =====================================================

function showWebFetchDialog() {
    hideNewDropdown();
    const modal = document.getElementById('webFetchModal');
    const urlInput = document.getElementById('webFetchUrlInput');
    const nameInput = document.getElementById('webFetchNameInput');
    const downloadBtn = document.getElementById('webFetchDownloadBtn');
    const progress = document.getElementById('webFetchProgress');

    if (modal && urlInput) {
        modal.classList.add('show');
        urlInput.value = '';
        nameInput.value = '';
        urlInput.focus();
        downloadBtn.disabled = false;
        progress.style.display = 'none';
    }
}

function closeWebFetchDialog() {
    const modal = document.getElementById('webFetchModal');
    if (modal) modal.classList.remove('show');
}

function downloadFromWeb() {
    const urlInput = document.getElementById('webFetchUrlInput');
    const nameInput = document.getElementById('webFetchNameInput');
    const downloadBtn = document.getElementById('webFetchDownloadBtn');
    const progress = document.getElementById('webFetchProgress');

    const url = urlInput.value.trim();
    const customName = nameInput.value.trim();

    if (!url) {
        showToast('Please enter a URL');
        urlInput.focus();
        return;
    }

    try {
        new URL(url);
    } catch (e) {
        showToast('Invalid URL format');
        urlInput.focus();
        return;
    }

    const currentFolder = window.currentFolder || 'root';

    downloadBtn.disabled = true;
    progress.style.display = 'block';

    fetch('download_from_url.php', {
        method: 'POST',
        headers: {'Content-Type': 'application/x-www-form-urlencoded'},
        body: `url=${encodeURIComponent(url)}&fileName=${encodeURIComponent(customName)}&targetFolder=${encodeURIComponent(currentFolder)}`
    })
    .then(response => response.json())
    .then(data => {
        progress.style.display = 'none';
        downloadBtn.disabled = false;

        if (data.success) {
            closeWebFetchDialog();
            showToast('File downloaded: ' + data.file.name);
            setTimeout(() => location.reload(), 1000);
        } else {
            showToast('Download failed: ' + (data.error || 'Unknown error'));
        }
    })
    .catch(error => {
        console.error('Error:', error);
        progress.style.display = 'none';
        downloadBtn.disabled = false;
        showToast('Error downloading file');
    });
}

// =====================================================
// SHARE FEATURE
// =====================================================

function shareSelected() {
    const selected = document.querySelectorAll('.file-item.selected');

    if (selected.length === 0) {
        showToast('Please select a file to share');
        return;
    }

    if (selected.length > 1) {
        showToast('Please select only one file to share');
        return;
    }

    const fileId = selected[0].dataset.fileId;
    const fileName = selected[0].dataset.fileName;
    showShareDialog(fileId, fileName);
}

function showShareDialog(fileId, fileName) {
    currentShareFileId = fileId;

    const modal = document.getElementById('shareModal');
    const fileNameEl = document.getElementById('shareFileName');

    if (modal && fileNameEl) {
        fileNameEl.textContent = fileName;
        modal.classList.add('show');
        
        const baseUrl = window.location.origin + window.location.pathname;
        const shareLink = `${baseUrl}?share=${fileId}`;
        const shareLinkInput = document.getElementById('shareLinkInput');
        const linkBox = document.getElementById('linkSharingBox');
        
        if (shareLinkInput) {
            shareLinkInput.value = shareLink;
        }
        if (linkBox) {
            linkBox.style.display = 'block';
        }
    }
}

function closeShareDialog() {
    const modal = document.getElementById('shareModal');
    if (modal) {
        modal.classList.remove('show');
        currentShareFileId = null;
    }
}

function updateShareAccess(accessType) {
    const linkSharingBox = document.getElementById('linkSharingBox');
    const shareLinkInput = document.getElementById('shareLinkInput');
    const shareStatusText = document.getElementById('shareStatusText');

    if (accessType === 'link') {
        const baseUrl = window.location.origin + window.location.pathname;
        const shareLink = `${baseUrl}?share=${currentShareFileId}`;

        shareLinkInput.value = shareLink;
        linkSharingBox.style.display = 'block';
        shareStatusText.textContent = 'Public - Anyone with the link';

        fetch('update_share.php', {
            method: 'POST',
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            body: `fileId=${encodeURIComponent(currentShareFileId)}&action=enable_link`
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showToast('Link sharing enabled');
                setTimeout(() => location.reload(), 1000);
            }
        })
        .catch(error => console.error('Error:', error));
    } else {
        linkSharingBox.style.display = 'none';
        shareStatusText.textContent = 'Private';

        fetch('update_share.php', {
            method: 'POST',
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            body: `fileId=${encodeURIComponent(currentShareFileId)}&action=disable_link`
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showToast('Link sharing disabled');
                setTimeout(() => location.reload(), 1000);
            }
        })
        .catch(error => console.error('Error:', error));
    }
}

function copyShareLink() {
    const shareLinkInput = document.getElementById('shareLinkInput');
    if (!shareLinkInput) return;

    shareLinkInput.select();
    shareLinkInput.setSelectionRange(0, 99999);

    try {
        document.execCommand('copy');
        showToast('Link copied to clipboard!');
    } catch (err) {
        navigator.clipboard.writeText(shareLinkInput.value)
            .then(() => showToast('Link copied to clipboard!'))
            .catch(() => showToast('Failed to copy link'));
    }
}

function loadShareStatus(fileId) {
    fetch(`get_shares.php?fileId=${encodeURIComponent(fileId)}`)
    .then(response => response.json())
    .then(data => {
        const restrictedRadio = document.querySelector('input[value="restricted"]');
        const linkRadio = document.querySelector('input[value="link"]');
        const linkSharingBox = document.getElementById('linkSharingBox');
        const shareLinkInput = document.getElementById('shareLinkInput');
        const shareStatusText = document.getElementById('shareStatusText');

        if (data.linkSharing) {
            linkRadio.checked = true;
            const baseUrl = window.location.origin + window.location.pathname;
            shareLinkInput.value = `${baseUrl}?share=${fileId}`;
            linkSharingBox.style.display = 'block';
            shareStatusText.textContent = 'Public - Anyone with the link';
        } else {
            restrictedRadio.checked = true;
            linkSharingBox.style.display = 'none';
            shareStatusText.textContent = 'Private';
        }
    })
    .catch(error => {
        console.error('Error loading share status:', error);
    });
}


// File type to Material Icon mapping
function getFileIcon(fileName, mimeType) {
    const extension = fileName.split('.').pop().toLowerCase();
    
    // Image files
    if (mimeType.startsWith('image/')) {
        return 'image';
    }
    
    // Video files
    if (mimeType.startsWith('video/')) {
        return 'movie';
    }
    
    // Audio files
    if (mimeType.startsWith('audio/')) {
        return 'audiotrack';
    }
    
    // Document files
    if (mimeType === 'application/pdf') {
        return 'picture_as_pdf';
    }
    
    // Microsoft Office
    if (extension === 'doc' || extension === 'docx' || mimeType.includes('word')) {
        return 'description';
    }
    if (extension === 'xls' || extension === 'xlsx' || mimeType.includes('excel') || mimeType.includes('spreadsheet')) {
        return 'table_chart';
    }
    if (extension === 'ppt' || extension === 'pptx' || mimeType.includes('powerpoint') || mimeType.includes('presentation')) {
        return 'slideshow';
    }
    
    // Archives
    if (extension === 'zip' || extension === 'rar' || extension === '7z' || extension === 'tar' || extension === 'gz') {
        return 'folder_zip';
    }
    
    // Code files
    if (extension === 'html' || extension === 'css' || extension === 'js' || extension === 'php' || 
        extension === 'py' || extension === 'java' || extension === 'cpp' || extension === 'c' ||
        extension === 'json' || extension === 'xml' || extension === 'sql') {
        return 'code';
    }
    
    // Text files
    if (mimeType.startsWith('text/') || extension === 'txt') {
        return 'article';
    }
    
    // Executable files
    if (extension === 'exe' || extension === 'msi' || extension === 'app' || extension === 'deb' || extension === 'rpm') {
        return 'settings_applications';
    }
    
    // Binary/System files
    if (extension === 'bin' || extension === 'dat' || extension === 'dll' || extension === 'sys' || extension === 'so') {
        return 'memory';
    }
    
    // ISO/Disk images
    if (extension === 'iso' || extension === 'img' || extension === 'dmg') {
        return 'album';
    }
    
    // Folders
    if (mimeType === 'folder') {
        return 'folder';
    }
    
    // Default
    return 'insert_drive_file';
}

// Also add this CSS for better icon styling
const iconStyles = `
.file-icon-preview {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
}

.file-icon-preview .material-icons {
    font-size: 64px;
    color: #5f6368;
}

/* Specific colors for file types */
.file-icon-preview.image-file .material-icons { color: #ea4335; }
.file-icon-preview.video-file .material-icons { color: #ea4335; }
.file-icon-preview.audio-file .material-icons { color: #fbbc04; }
.file-icon-preview.pdf-file .material-icons { color: #ea4335; }
.file-icon-preview.word-file .material-icons { color: #4285f4; }
.file-icon-preview.excel-file .material-icons { color: #34a853; }
.file-icon-preview.powerpoint-file .material-icons { color: #ea4335; }
.file-icon-preview.archive-file .material-icons { color: #f9ab00; }
.file-icon-preview.code-file .material-icons { color: #5f6368; }
.file-icon-preview.executable-file .material-icons { color: #1a73e8; }
.file-icon-preview.binary-file .material-icons { color: #5f6368; }
`;