import { api } from '../api.js';

export class FileList extends HTMLElement {
    constructor() {
        super();
        this.currentFolderId = null;
        this.files = [];
        this.folders = [];
    }

    async connectedCallback() {
        await this.loadContents(null);
    }

    async loadContents(folderId) {
        this.currentFolderId = folderId;
        try {
            this.folders = await api.listFolders(folderId);
            this.files = await api.listFiles(folderId);
            this.render();
        } catch (error) {
            console.error('Failed to load contents:', error);
        }
    }

    setFiles(files) {
        this.files = files;
        this.folders = [];
        this.render();
    }

    render() {
        this.innerHTML = `
            <div class="file-list-container">
                <div class="file-list-header">
                    <h2>Files</h2>
                    <div class="file-actions">
                        <button class="button" id="create-folder-btn">New Folder</button>
                        <button class="button button-primary" id="upload-btn">Upload</button>
                    </div>
                </div>

                <div class="file-grid">
                    ${this.folders.map(folder => this.renderFolder(folder)).join('')}
                    ${this.files.map(file => this.renderFile(file)).join('')}
                </div>
            </div>
        `;

        this.attachListeners();
    }

    renderFolder(folder) {
        return `
            <div class="file-item folder-item" data-folder-id="${folder.id}">
                <div class="file-icon">&#128193;</div>
                <div class="file-name">${folder.name}</div>
                <div class="file-actions-menu">
                    <button class="action-btn" data-action="delete-folder" data-id="${folder.id}">Delete</button>
                </div>
            </div>
        `;
    }

    renderFile(file) {
        const icon = this.getFileIcon(file.mime_type);
        const size = this.formatFileSize(file.size);

        return `
            <div class="file-item" data-file-id="${file.id}">
                <div class="file-icon">${icon}</div>
                <div class="file-name">${file.name}</div>
                <div class="file-size">${size}</div>
                <div class="file-actions-menu">
                    <button class="action-btn" data-action="download" data-id="${file.id}">Download</button>
                    <button class="action-btn" data-action="rename" data-id="${file.id}">Rename</button>
                    <button class="action-btn" data-action="delete" data-id="${file.id}">Delete</button>
                    <button class="action-btn" data-action="share" data-id="${file.id}">Share</button>
                </div>
            </div>
        `;
    }

    getFileIcon(mimeType) {
        if (mimeType.startsWith('image/')) return '&#128247;';
        if (mimeType.startsWith('video/')) return '&#127909;';
        if (mimeType.startsWith('audio/')) return '&#127925;';
        if (mimeType.includes('pdf')) return '&#128196;';
        if (mimeType.includes('text')) return '&#128196;';
        return '&#128196;';
    }

    formatFileSize(bytes) {
        if (bytes < 1024) return bytes + ' B';
        if (bytes < 1048576) return (bytes / 1024).toFixed(1) + ' KB';
        if (bytes < 1073741824) return (bytes / 1048576).toFixed(1) + ' MB';
        return (bytes / 1073741824).toFixed(1) + ' GB';
    }

    attachListeners() {
        this.querySelector('#upload-btn')?.addEventListener('click', () => {
            this.dispatchEvent(new CustomEvent('upload-request'));
        });

        this.querySelector('#create-folder-btn')?.addEventListener('click', async () => {
            await this.handleCreateFolder();
        });

        this.querySelectorAll('.folder-item').forEach(item => {
            item.addEventListener('dblclick', () => {
                const folderId = parseInt(item.dataset.folderId);
                this.dispatchEvent(new CustomEvent('folder-open', { detail: { folderId } }));
            });
        });

        this.querySelectorAll('.file-item:not(.folder-item)').forEach(item => {
            item.addEventListener('click', (e) => {
                if (!e.target.classList.contains('action-btn')) {
                    const fileId = parseInt(item.dataset.fileId);
                    const file = this.files.find(f => f.id === fileId);
                    this.dispatchEvent(new CustomEvent('photo-click', {
                        detail: { photo: file },
                        bubbles: true
                    }));
                }
            });
        });

        this.querySelectorAll('.action-btn').forEach(btn => {
            btn.addEventListener('click', async (e) => {
                e.stopPropagation();
                const action = btn.dataset.action;
                const id = parseInt(btn.dataset.id);
                await this.handleAction(action, id);
            });
        });
    }

    triggerCreateFolder() {
        this.handleCreateFolder();
    }

    async handleCreateFolder() {
        const name = prompt('Enter folder name:');
        if (name) {
            try {
                await api.createFolder(name, this.currentFolderId);
                await this.loadContents(this.currentFolderId);
            } catch (error) {
                alert('Failed to create folder: ' + error.message);
            }
        }
    }

    async handleAction(action, id) {
        try {
            switch (action) {
                case 'download':
                    const blob = await api.downloadFile(id);
                    const file = this.files.find(f => f.id === id);
                    const url = URL.createObjectURL(blob);
                    const a = document.createElement('a');
                    a.href = url;
                    a.download = file.name;
                    a.click();
                    URL.revokeObjectURL(url);
                    break;

                case 'rename':
                    const newName = prompt('Enter new name:');
                    if (newName) {
                        await api.renameFile(id, newName);
                        await this.loadContents(this.currentFolderId);
                    }
                    break;

                case 'delete':
                    if (confirm('Are you sure you want to delete this file?')) {
                        await api.deleteFile(id);
                        await this.loadContents(this.currentFolderId);
                    }
                    break;

                case 'delete-folder':
                    if (confirm('Are you sure you want to delete this folder?')) {
                        await api.deleteFolder(id);
                        await this.loadContents(this.currentFolderId);
                    }
                    break;

                case 'share':
                    this.dispatchEvent(new CustomEvent('share-request', { detail: { fileId: id } }));
                    break;
            }
        } catch (error) {
            alert('Action failed: ' + error.message);
        }
    }
}

customElements.define('file-list', FileList);