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

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

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

    async loadDeletedFiles() {
        try {
            this.files = await api.listDeletedFiles();
            this.folders = [];
            this.selectedFiles.clear();
            this.selectedFolders.clear();
            this.render();
        } catch (error) {
            console.error('Failed to load deleted files:', error);
            this.innerHTML = '<p class="error-message">Failed to load deleted files.</p>';
        }
    }

    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>Deleted Files</h2>
                    </div>
                    <p class="empty-state">No deleted files found.</p>
                </div>
            `;
            return;
        }

        this.innerHTML = `
            <div class="file-list-container">
                <div class="file-list-header">
                    <div class="header-left">
                        <h2>Deleted 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 button-primary" id="batch-restore-btn">Restore Selected</button>
                        <button class="button button-small" id="clear-selection-btn">Clear Selection</button>
                    </div>
                ` : ''}

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

    renderDeletedFile(file) {
        const isSelected = this.selectedFiles.has(file.id);
        const icon = this.getFileIcon(file.mime_type);
        const size = this.formatFileSize(file.size);
        const deletedAt = file.deleted_at ? new Date(file.deleted_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-deleted-at">Deleted: ${deletedAt}</div>
                <div class="file-actions-menu">
                    <button class="action-btn" data-action="restore" data-id="${file.id}">Restore</button>
                </div>
            </div>
        `;
    }

    createBatchActionsBar() {
        const container = this.querySelector('.file-list-container');
        const header = container.querySelector('.file-list-header');
        const batchBar = document.createElement('div');
        batchBar.className = 'batch-actions';
        batchBar.innerHTML = `
            <button class="button button-small button-primary" id="batch-restore-btn">Restore Selected</button>
            <button class="button button-small" id="clear-selection-btn">Clear Selection</button>
        `;
        header.insertAdjacentElement('afterend', batchBar);
    }

    attachListeners() {
        const batchRestoreBtn = this.querySelector('#batch-restore-btn');
        if (batchRestoreBtn) {
            batchRestoreBtn.addEventListener('click', () => this.handleBatchRestore());
        }
    }

    async handleBatchRestore() {
        const totalSelected = this.selectedFiles.size;
        if (totalSelected === 0) return;

        if (!confirm(`Restore ${totalSelected} files?`)) return;

        try {
            for (const fileId of this.selectedFiles) {
                await api.restoreFile(fileId);
            }
            document.dispatchEvent(new CustomEvent('show-toast', {
                detail: { message: 'Files restored successfully!', type: 'success' }
            }));
            await this.loadDeletedFiles();
        } catch (error) {
            document.dispatchEvent(new CustomEvent('show-toast', {
                detail: { message: 'Failed to restore files: ' + error.message, type: 'error' }
            }));
        }
    }

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

customElements.define('deleted-files', DeletedFiles);