import { api } from '../api.js';
import { BaseFileList } from './base-file-list.js';

export class RecentFiles extends BaseFileList {
    constructor() {
        super();
    }

    async connectedCallback() {
        super.connectedCallback();
        await this.loadRecentFiles();
    }

    async loadRecentFiles() {
        try {
            this.files = await api.listRecentFiles();
            this.folders = [];
            this.selectedFiles.clear();
            this.selectedFolders.clear();
            this.render();
        } catch (error) {
            console.error('Failed to load recent files:', error);
            document.dispatchEvent(new CustomEvent('show-toast', {
                detail: { message: 'Failed to load recent files: ' + error.message, type: 'error' }
            }));
        }
    }

    render() {
        const hasSelected = this.selectedFiles.size > 0;
        const totalSelected = this.selectedFiles.size;
        const allSelected = this.files.length > 0 && this.selectedFiles.size === this.files.length;
        const someSelected = hasSelected && !allSelected;

        if (this.files.length === 0) {
            this.innerHTML = `
                <div class="file-list-container">
                    <div class="file-list-header">
                        <h2>Recent Files</h2>
                    </div>
                    <p class="empty-state">No recent files found.</p>
                </div>
            `;
            return;
        }

        this.innerHTML = `
            <div class="file-list-container">
                <div class="file-list-header">
                    <div class="header-left">
                        <h2>Recent Files</h2>
                        ${this.files.length > 0 ? `
                            <div class="selection-controls">
                                <input type="checkbox" id="select-all" ${allSelected ? 'checked' : ''} ${someSelected ? 'data-indeterminate="true"' : ''}>
                                <label for="select-all">
                                    ${hasSelected ? `${totalSelected} selected` : 'Select all'}
                                </label>
                            </div>
                        ` : ''}
                    </div>
                </div>

                ${hasSelected ? `
                    <div class="batch-actions">
                        <button class="button button-small" id="clear-selection-btn">Clear Selection</button>
                    </div>
                ` : ''}

                <div class="file-grid">
                    ${this.files.map(file => this.renderRecentFile(file)).join('')}
                </div>
            </div>
        `;
        this.attachListeners();
        this.updateIndeterminateState();
    }

    renderRecentFile(file) {
        const isSelected = this.selectedFiles.has(file.id);
        const icon = this.getFileIcon(file.mime_type);
        const size = this.formatFileSize(file.size);
        const lastAccessed = file.last_accessed_at ? new Date(file.last_accessed_at).toLocaleString() : 'N/A';

        return `
            <div class="file-item ${isSelected ? 'selected' : ''}" data-file-id="${file.id}">
                <input type="checkbox" class="select-item" data-type="file" data-id="${file.id}" ${isSelected ? 'checked' : ''}>
                <div class="file-icon">${icon}</div>
                <div class="file-name">${file.name}</div>
                <div class="file-size">${size}</div>
                <div class="file-last-accessed">Accessed: ${lastAccessed}</div>
                <div class="file-actions-menu">
                    <button class="action-btn" data-action="download" data-id="${file.id}">Download</button>
                </div>
            </div>
        `;
    }

    async handleAction(action, id) {
        try {
            if (action === '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);
                document.dispatchEvent(new CustomEvent('show-toast', {
                    detail: { message: 'File downloaded successfully!', type: 'success' }
                }));
            }
        } catch (error) {
            document.dispatchEvent(new CustomEvent('show-toast', {
                detail: { message: 'Action failed: ' + error.message, type: 'error' }
            }));
        }
    }
}

customElements.define('recent-files', RecentFiles);