import config from './config.js';
import { generateKey, encryptData, decryptData, exportKey, importKey } from './crypto.js';

const textarea = document.getElementById('secretInput');
const shareButton = document.getElementById('shareButton');
const spinner = document.getElementById('spinner');

async function handleShare() {
    if (!textarea.value.trim()) return;
    
    try {
        spinner.classList.remove('hidden');
        
        // Generate encryption key and encrypt data
        const key = await generateKey();
        const encryptedData = await encryptData(textarea.value, key);
        
        // Send encrypted data to server
        const response = await fetch(`${config.API_BASE_URL}/secret`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ data: encryptedData })
        });
        
        const { key: secretKey } = await response.json();
        const exportedKey = await exportKey(key);
        
        // Create sharing URL
        const combinedData = `${secretKey}::${exportedKey}`;
        const encodedData = btoa(combinedData);
        const shareUrl = `${window.location.origin}/${encodedData}`;
        
        textarea.value = shareUrl;
    } catch (error) {
        console.error('Sharing failed:', error);
    } finally {
        spinner.classList.add('hidden');
    }
}

async function handlePageLoad() {
    const path = window.location.pathname.substring(1);
    if (!path) return;
    
    try {
        // Try to decode the URL
        const decodedData = atob(path);
        const [secretKey, encryptionKeyData] = decodedData.split('::');
        
        if (!secretKey || !encryptionKeyData) return;
        
        spinner.classList.remove('hidden');
        
        // Fetch the secret
        const response = await fetch(`${config.API_BASE_URL}/secret/${secretKey}`);
        
        if (response.status === 404) {
            textarea.value = "Oops, your secret could not be found. Have you already retrieved it?";
            return;
        }
        
        const { data: encryptedData } = await response.json();
        
        // Decrypt the data
        const key = await importKey(encryptionKeyData);
        const decryptedData = await decryptData(encryptedData, key);
        
        textarea.value = decryptedData;
    } catch (error) {
        console.error('Loading secret failed:', error);
    } finally {
        spinner.classList.add('hidden');
    }
}

shareButton.addEventListener('click', handleShare);
window.addEventListener('load', handlePageLoad);