// --- Configuration ---
// IMPORTANT: For production, use a SEARCH-ONLY API Key.
//            NEVER expose your Admin API Key in client-side code.
//            Best practice is to proxy requests through your backend
//            or use Typesense Scoped Search Keys.
const TYPESENSE_CONFIG = {
    nodes: [{
        host: '192.168.2.203', // Or your Typesense host
        port: '8108',
        protocol: 'http'
    }],
    apiKey: 'imdiowenxodjioqwenlj', // Generate a search-only API key in Typesense
    connectionTimeoutSeconds: 2
};

const typesenseClient = new Typesense.Client(TYPESENSE_CONFIG);

// --- DOM Elements ---
const searchInput = document.getElementById('user-search-input');
const suggestionsList = document.getElementById('suggestions-list');
const selectedUserIdEl = document.getElementById('selected-user-id');
const selectedUserNameEl = document.getElementById('selected-user-name');

// --- Debounce Function (to limit API calls) ---
let debounceTimer;
function debounce(func, delay) {
    return function(...args) {
        clearTimeout(debounceTimer);
        debounceTimer = setTimeout(() => func.apply(this, args), delay);
    };
}

// --- Fetch and Display Suggestions ---
async function fetchSuggestions(query) {
    if (!query.trim()) {
        suggestionsList.innerHTML = '';
        suggestionsList.style.display = 'none';
        return;
    }

    const searchParameters = {
        'q': query,
        'query_by': 'user_name', // Field to search in
        'per_page': 5,           // Number of suggestions to show
        // 'sort_by': '_text_match:desc', // Default, or 'user_name_lowercase_sort:asc' if you use that field
        'infix': 'always',       // Ensure infix search is active if not default for the field
        // 'filter_by': 'is_active:=true' // Example: if you have an is_active boolean field
    };

    try {
        const searchResults = await typesenseClient.collections('users').documents().search(searchParameters);
        displaySuggestions(searchResults.hits || []);
    } catch (error) {
        console.error('Typesense search error:', error);
        suggestionsList.innerHTML = '<li>Error fetching suggestions</li>';
        suggestionsList.style.display = 'block';
    }
}

function displaySuggestions(hits) {
    suggestionsList.innerHTML = ''; // Clear previous suggestions
    if (hits.length === 0) {
        suggestionsList.style.display = 'none';
        return;
    }

    hits.forEach(hit => {
        const user = hit.document; // The actual document data
        const li = document.createElement('li');

        // Create a highlighted version of the name if available
        let displayName = user.user_name;
        if (hit.highlights && hit.highlights.length > 0) {
            const nameHighlight = hit.highlights.find(h => h.field === 'user_name');
            if (nameHighlight && nameHighlight.snippet) {
                displayName = nameHighlight.snippet; // Use Typesense's highlighted version
            }
        }
        li.innerHTML = displayName; // Display name (can be highlighted)

        // Store full user data (or just ID) for selection
        li.dataset.userId = user.user_id;
        li.dataset.userName = user.user_name; // Store the original, non-highlighted name

        li.addEventListener('click', () => {
            searchInput.value = user.user_name; // Fill input with selected name
            selectedUserIdEl.textContent = user.user_id;
            selectedUserNameEl.textContent = user.user_name;
            suggestionsList.innerHTML = ''; // Clear suggestions
            suggestionsList.style.display = 'none';

            // You now have user.user_id and user.user_name
            console.log('Selected:', { id: user.user_id, name: user.user_name });
            // Here, you might want to submit a form, make another API call, etc.
        });
        suggestionsList.appendChild(li);
    });
    suggestionsList.style.display = 'block';
}

// --- Event Listeners ---
searchInput.addEventListener('input', debounce((event) => {
    fetchSuggestions(event.target.value);
}, 300)); // 300ms debounce

// Optional: Hide suggestions when clicking outside
document.addEventListener('click', (event) => {
    if (!searchInput.contains(event.target) && !suggestionsList.contains(event.target)) {
        suggestionsList.style.display = 'none';
    }
});

console.log("Autocomplete App Initialized. Make sure your Typesense server is running and accessible.");
console.log("And ensure you've replaced 'YOUR_SEARCH_ONLY_API_KEY' with a valid key.");