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

export class FileUpload extends HTMLElement {
    constructor() {
        super();
        this.folderId = null;
        this.handleEscape = this.handleEscape.bind(this);
        this.render();
        this.attachListeners();
    }

    setFolder(folderId) {
        this.folderId = folderId;
    }

    render() {
        this.innerHTML = `
            <div class="upload-modal" id="upload-modal" style="display: none;">
                <div class="upload-modal-content">
                    <div class="upload-header">
                        <h3>Upload Files</h3>
                        <button class="close-btn" id="close-upload">&times;</button>
                    </div>

                    <div class="drop-zone" id="drop-zone">
                        <div class="drop-zone-text">
                            <p>Drag and drop files here</p>
                            <p>or</p>
                            <button class="button button-primary" id="select-files-btn">Select Files</button>
                            <input type="file" id="file-input" multiple style="display: none;">
                        </div>
                    </div>

                    <div class="upload-list" id="upload-list"></div>
                </div>
            </div>
        `;
    }

    attachListeners() {
        const modal = this.querySelector('#upload-modal');
        const dropZone = this.querySelector('#drop-zone');
        const fileInput = this.querySelector('#file-input');
        const selectBtn = this.querySelector('#select-files-btn');
        const closeBtn = this.querySelector('#close-upload');

        selectBtn.addEventListener('click', () => fileInput.click());
        fileInput.addEventListener('change', (e) => this.handleFiles(e.target.files));

        closeBtn.addEventListener('click', () => this.hide());

        dropZone.addEventListener('dragover', (e) => {
            e.preventDefault();
            dropZone.classList.add('drag-over');
        });

        dropZone.addEventListener('dragleave', () => {
            dropZone.classList.remove('drag-over');
        });

        dropZone.addEventListener('drop', (e) => {
            e.preventDefault();
            dropZone.classList.remove('drag-over');
            this.handleFiles(e.dataTransfer.files);
        });
    }

    handleEscape(e) {
        if (e.key === 'Escape') {
            const modal = this.querySelector('#upload-modal');
            if (modal.style.display === 'flex') {
                this.hide();
            }
        }
    }

    show() {
        this.querySelector('#upload-modal').style.display = 'flex';
        document.addEventListener('keydown', this.handleEscape);
    }

    hide() {
        this.querySelector('#upload-modal').style.display = 'none';
        this.querySelector('#upload-list').innerHTML = '';
        document.removeEventListener('keydown', this.handleEscape);
    }

    async handleFiles(files) {
        const uploadList = this.querySelector('#upload-list');

        for (const file of files) {
            const itemId = `upload-${Date.now()}-${Math.random()}`;
            const item = document.createElement('div');
            item.className = 'upload-item';
            item.id = itemId;
            item.innerHTML = `
                <div class="upload-item-name">${file.name}</div>
                <div class="upload-item-progress">
                    <div class="progress-bar">
                        <div class="progress-fill" style="width: 0%"></div>
                    </div>
                    <span class="upload-status">Uploading...</span>
                </div>
            `;
            uploadList.appendChild(item);

            try {
                await api.uploadFile(file, this.folderId);
                const status = item.querySelector('.upload-status');
                const progressFill = item.querySelector('.progress-fill');
                progressFill.style.width = '100%';
                status.textContent = 'Complete';
                status.classList.add('success');
            } catch (error) {
                const status = item.querySelector('.upload-status');
                status.textContent = 'Failed: ' + error.message;
                status.classList.add('error');
            }
        }

        this.dispatchEvent(new CustomEvent('upload-complete'));
    }
}

customElements.define('file-upload', FileUpload);