import { getMeteredIceServers, initMeteredIceServers, globalIceServers } from './metered.js';
import './interview-call.js';
import './candidate-room.js';
import './candidate-proctor.js';

window.globalIceServers = globalIceServers;
window.getMeteredIceServers = getMeteredIceServers;
window.initMeteredIceServers = initMeteredIceServers;

// Pre-fetch TURN credentials immediately on app boot
if (typeof window !== 'undefined') {
    window.getMeteredIceServers();
}

// Global Button Loader Handler
if (typeof document !== 'undefined') {
    document.addEventListener('click', function (e) {
        const btn = e.target.closest('button[data-show-loader="true"]');
        if (!btn || btn.disabled) return;

        if (btn.type === 'submit' && btn.form && !btn.form.checkValidity()) {
            return;
        }

        const spinner = btn.querySelector('.btn-spinner');
        const icon = btn.querySelector('.btn-icon');
        const text = btn.querySelector('.btn-text');

        if (spinner) {
            spinner.classList.remove('hidden!');
            if (icon) icon.classList.add('hidden!');
        }

        const loadingText = btn.getAttribute('data-loading-text');
        if (loadingText && text) {
            text.innerText = loadingText;
        }
    });
}

// Copy Interview Assessment Credentials Handler
window.copyInterviewCredentials = function (btn) {
    const text = btn.getAttribute('data-credentials');
    if (!text) return;

    const copyToClipboard = () => {
        if (navigator.clipboard && window.isSecureContext) {
            return navigator.clipboard.writeText(text);
        } else {
            const textarea = document.createElement('textarea');
            textarea.value = text;
            textarea.style.position = 'fixed';
            textarea.style.left = '-999999px';
            textarea.style.top = '-999999px';
            textarea.style.opacity = '0';
            document.body.appendChild(textarea);
            textarea.focus();
            textarea.select();
            document.execCommand('copy');
            document.body.removeChild(textarea);
            return Promise.resolve();
        }
    };

    copyToClipboard().then(() => {
        const icon = btn.querySelector('i');
        const label = btn.querySelector('.copy-label');
        const originalIconClass = icon ? icon.className : '';
        const originalText = label ? label.textContent : '';
        const originalBtnClass = btn.className;

        if (icon) icon.className = 'fa-solid fa-check text-emerald-400 text-[11px]';
        if (label) {
            label.textContent = 'Copied!';
            label.classList.add('text-emerald-300');
        }
        btn.classList.add('border-emerald-500/50', 'bg-emerald-500/10');

        setTimeout(() => {
            if (icon) icon.className = originalIconClass;
            if (label) {
                label.textContent = originalText;
                label.classList.remove('text-emerald-300');
            }
            btn.className = originalBtnClass;
        }, 2000);
    }).catch(err => {
        console.error('Failed to copy credentials: ', err);
    });
};

// Candidate Resume Lightbox Previewer
window.openResumeLightbox = function (url, title = 'Candidate Resume') {
    if (!url) return;
    const modal = document.getElementById('resume-lightbox-modal');
    const frame = document.getElementById('resume-lightbox-frame');
    const loader = document.getElementById('resume-lightbox-loader');
    const titleEl = document.getElementById('resume-lightbox-title');
    const newTabBtn = document.getElementById('resume-lightbox-newtab');

    if (!modal || !frame) return;

    if (titleEl) titleEl.textContent = title;
    if (newTabBtn) newTabBtn.href = url;

    if (loader) loader.classList.remove('hidden');
    frame.classList.add('opacity-0');

    frame.onload = function () {
        if (loader) loader.classList.add('hidden');
        frame.classList.remove('opacity-0');
    };

    frame.src = url;
    modal.classList.add('active');

    // Disable background page scrolling
    if (typeof document !== 'undefined') {
        document.body.classList.add('overflow-hidden');
        document.documentElement.classList.add('overflow-hidden');
    }
};

window.closeResumeLightbox = function (e = null) {
    if (e && e.stopPropagation) {
        e.stopPropagation();
    }
    const modal = document.getElementById('resume-lightbox-modal');
    const frame = document.getElementById('resume-lightbox-frame');
    if (modal) modal.classList.remove('active');
    if (frame) frame.src = 'about:blank';

    // Restore background page scrolling
    if (typeof document !== 'undefined') {
        document.body.classList.remove('overflow-hidden');
        document.documentElement.classList.remove('overflow-hidden');
    }
};

// Close on Escape key
if (typeof document !== 'undefined') {
    document.addEventListener('keydown', function (e) {
        if (e.key === 'Escape') {
            window.closeResumeLightbox();
        }
    });
}

// Drawer Candidate Resume Upload Handlers
window.handleDrawerResumeSelect = function (input) {
    if (!input || !input.files || !input.files[0]) return;
    const file = input.files[0];

    const dropzone = document.getElementById('drawer-resume-dropzone');
    const selectedBadge = document.getElementById('drawer-resume-selected');
    const filenameEl = document.getElementById('drawer-resume-filename');
    const filesizeEl = document.getElementById('drawer-resume-filesize');

    if (filenameEl) filenameEl.textContent = file.name;
    if (filesizeEl) {
        const sizeKb = file.size / 1024;
        filesizeEl.textContent = sizeKb >= 1024
            ? (sizeKb / 1024).toFixed(2) + ' MB'
            : sizeKb.toFixed(1) + ' KB';
    }

    if (dropzone) dropzone.classList.add('hidden');
    if (selectedBadge) selectedBadge.classList.remove('hidden');
};

window.previewSelectedDrawerResume = function () {
    const input = document.getElementById('drawer_resume_input');
    if (!input || !input.files || !input.files[0]) return;
    const file = input.files[0];
    const objectUrl = URL.createObjectURL(file);
    window.openResumeLightbox(objectUrl, `${file.name} (Uploaded Preview)`);
};

window.clearSelectedDrawerResume = function () {
    const input = document.getElementById('drawer_resume_input');
    const dropzone = document.getElementById('drawer-resume-dropzone');
    const selectedBadge = document.getElementById('drawer-resume-selected');

    if (input) input.value = '';
    if (selectedBadge) selectedBadge.classList.add('hidden');
    if (dropzone) dropzone.classList.remove('hidden');
};