const root = document.documentElement;
const saved = window?.localStorage?.getItem('theme');
const sysDark = window.matchMedia('(prefers-color-scheme: dark)').matches;

if (saved) {
    root.setAttribute('data-theme', saved);
} else {
    if (sysDark) {
        root.setAttribute('data-theme', 'dark');
    } else {
        root.setAttribute('data-theme', 'light');
    }
}

// Theme toggle
const themeToggle = document.getElementById('theme-toggle');
if (themeToggle) {
    themeToggle.addEventListener('click', () => {
        const current = root.getAttribute('data-theme') || 'light';
        const next = current === 'light' ? 'dark' : 'light';
        root.setAttribute('data-theme', next);
        try {
            localStorage.setItem('theme', next);
        } catch (_) {}
    });
}

// Lightbox (structure from Lightbox.svelte; we fill content and handle open/close)
const dialog = document.querySelector('dialog.lightbox');
const lbContent = dialog?.querySelector('.lb-content');
const lbCaption = dialog?.querySelector('#lb-caption, .lb-caption');
let lightboxOpener = null;

function openLightbox(name, type, caption) {
    if (!dialog || !lbContent || !lbCaption) return;
    lightboxOpener = document.activeElement;
    document.body.style.overflow = 'hidden';

    if (type === 'video') {
        lbContent.innerHTML = `<video src="/assets/media/videos/${name}.mp4" controls autoplay><track kind="captions" src="/assets/media/videos/${name}-captions.vtt" default></video>`;
    } else {
        const srcset = (bp) =>
            type === 'image'
                ? `/assets/media/${bp}/${name}@1x.webp 1x, /assets/media/${bp}/${name}.webp 2x`
                : `/assets/media/${bp}/${name}_still@1x.webp 1x, /assets/media/${bp}/${name}_still.webp 2x`;
        lbContent.innerHTML = `<picture>
            <source media="(min-width:1024px)" srcset="${srcset('desktop')}">
            <source media="(min-width:768px)" srcset="${srcset('tablet')}">
            <source media="(min-width:0px)" srcset="${srcset('mobile')}">
            <img src="/assets/media/thumbnail/${name}.webp" alt="">
        </picture>`;
    }
    lbCaption.textContent = caption || '';
    dialog.removeAttribute('inert');
    dialog.setAttribute('aria-hidden', 'false');
    dialog.showModal();
}

function closeLightbox() {
    if (!dialog) return;
    if (lightboxOpener && typeof lightboxOpener.focus === 'function') {
        lightboxOpener.focus();
    }
    lightboxOpener = null;
    document.body.style.overflow = '';
    if (lbContent) lbContent.innerHTML = '';
    if (lbCaption) lbCaption.textContent = '';
    dialog.setAttribute('aria-hidden', 'true');
    dialog.setAttribute('inert', '');
    dialog.close();
}

if (dialog) {
    // Add event handlers
    dialog.querySelector('.lb-close').addEventListener('click', closeLightbox);
    dialog.querySelector('.lb-close').addEventListener('keydown', (e) => {
        if (e.key === 'Enter' || e.key === ' ') {
            e.preventDefault();
            closeLightbox();
        }
    });
    dialog.addEventListener('close', closeLightbox);
    dialog.addEventListener('cancel', closeLightbox);
    dialog.addEventListener('click', (e) => {
        if (e.target === dialog) closeLightbox();
    });
}

// Gallery items
document.querySelectorAll('.gallery-item[data-name]').forEach((el) => {
    el.addEventListener('click', () => {
        const name = el.getAttribute('data-name');
        const type = el.getAttribute('data-type') || 'image';
        const caption = el.getAttribute('data-caption') || '';
        if (name) openLightbox(name, type, caption);
    });
    el.addEventListener('keydown', (e) => {
        if (e.key === 'Enter' || e.key === ' ') {
            e.preventDefault();
            const name = el.getAttribute('data-name');
            const type = el.getAttribute('data-type') || 'image';
            const caption = el.getAttribute('data-caption') || '';
            if (name) openLightbox(name, type, caption);
        }
    });
});

// Show video button (open lightbox with tour)
const showVideoBtn = document.getElementById('show_video');
if (showVideoBtn) {
    const openTour = () => {
        const name = showVideoBtn.getAttribute('data-name') || 'tour';
        const type = showVideoBtn.getAttribute('data-type') || 'video';
        const caption =
            showVideoBtn.getAttribute('data-caption') ||
            "Take the scenic route—explore your the home's highlights with a virtual walkthrough.";
        openLightbox(name, type, caption);
    };
    showVideoBtn.addEventListener('click', openTour);
    showVideoBtn.addEventListener('keydown', (e) => {
        if (e.key === 'Enter' || e.key === ' ') {
            e.preventDefault();
            openTour();
        }
    });
}