const API = '';
let currentPage = 'dashboard';

async function api(path, opts = {}) {
    const res = await fetch(API + path, {
        headers: { 'Content-Type': 'application/json' },
        ...opts
    });
    return res.json();
}

function toast(msg) {
    let t = document.querySelector('.toast');
    if (!t) { t = document.createElement('div'); t.className = 'toast'; document.body.appendChild(t); }
    t.textContent = msg;
    t.classList.add('show');
    setTimeout(() => t.classList.remove('show'), 3000);
}

function navigate(page) {
    currentPage = page;
    document.querySelectorAll('#nav-links a').forEach(a => {
        a.classList.toggle('active', a.dataset.page === page);
    });
    renderPage(page);
}

async function renderPage(page) {
    const el = document.getElementById('content');
    switch (page) {
        case 'dashboard': return renderDashboard(el);
        case 'albums': return renderAlbums(el);
        case 'slideshow': return renderSlideshow(el);
        case 'display': return renderDisplay(el);
        case 'device': return renderDevice(el);
        case 'firmware': return renderFirmware(el);
    }
}

async function renderDashboard(el) {
    const status = await api('/api/status');
    el.innerHTML = `
        <div class="card">
            <h2>Status</h2>
            <div class="stat"><span>Battery</span><span>${status.battery}%${status.charging ? ' ⚡' : ''}</span></div>
            <div class="stat"><span>WiFi Signal</span><span>${status.wifi_rssi} dBm</span></div>
            <div class="stat"><span>IP Address</span><span>${status.ip}</span></div>
            <div class="stat"><span>Uptime</span><span>${Math.floor(status.uptime/60)}m</span></div>
            <div class="stat"><span>Free RAM</span><span>${Math.floor(status.free_heap/1024)}KB</span></div>
            <div class="stat"><span>Free PSRAM</span><span>${Math.floor(status.free_psram/1024)}KB</span></div>
        </div>
        <div class="card">
            <h2>Controls</h2>
            <div class="btn-group">
                <button class="btn btn-primary" onclick="api('/api/action/next',{method:'POST'}).then(()=>toast('Next photo'))">Next</button>
                <button class="btn btn-primary" onclick="api('/api/action/random',{method:'POST'}).then(()=>toast('Random photo'))">Random</button>
                <button class="btn btn-primary" onclick="api('/api/action/pause',{method:'POST'}).then(()=>toast('Paused'))">Pause</button>
                <button class="btn btn-primary" onclick="api('/api/action/play',{method:'POST'}).then(()=>toast('Playing'))">Play</button>
            </div>
        </div>`;
}

async function renderAlbums(el) {
    const [albums, settings] = await Promise.all([api('/api/albums'), api('/api/settings')]);
    const selected = JSON.parse(settings.albums_json || '[]');
    el.innerHTML = `
        <div class="card">
            <h2>Albums</h2>
            <ul class="checkbox-list">
                ${albums.map(a => `
                    <li>
                        <input type="checkbox" value="${a.id}" ${selected.includes(a.id) ? 'checked' : ''}>
                        <span>${a.title} (${a.assetCount})</span>
                    </li>`).join('')}
            </ul>
            <div class="btn-group">
                <button class="btn btn-primary" id="saveAlbums">Save Selection</button>
            </div>
        </div>`;
    document.getElementById('saveAlbums').onclick = async () => {
        const ids = [...el.querySelectorAll('input[type=checkbox]:checked')].map(c => c.value);
        await api('/api/albums/select', { method: 'POST', body: JSON.stringify({ album_ids: ids }) });
        toast('Albums saved');
    };
}

async function renderSlideshow(el) {
    const settings = await api('/api/settings');
    const intervals = [1, 5, 15, 30, 60];
    const modes = ['Random', 'Chronological', 'Reverse Chrono', 'Favorites Weighted'];
    el.innerHTML = `
        <div class="card">
            <h2>Interval</h2>
            <div class="preset-btns">
                ${intervals.map(i => `<button class="${settings.interval_min===i?'active':''}" data-interval="${i}">${i}m</button>`).join('')}
            </div>
        </div>
        <div class="card">
            <h2>Cycling Mode</h2>
            <div class="field">
                <select id="cycleMode">
                    ${modes.map((m, i) => `<option value="${i}" ${settings.cycle_mode===i?'selected':''}>${m}</option>`).join('')}
                </select>
            </div>
        </div>
        <div class="btn-group"><button class="btn btn-primary" id="saveSlideshow">Save</button></div>`;
    el.querySelectorAll('[data-interval]').forEach(btn => {
        btn.onclick = () => {
            el.querySelectorAll('[data-interval]').forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
        };
    });
    document.getElementById('saveSlideshow').onclick = async () => {
        const interval = parseInt(el.querySelector('[data-interval].active')?.dataset.interval || '5');
        const mode = parseInt(document.getElementById('cycleMode').value);
        await api('/api/settings', { method: 'POST', body: JSON.stringify({ interval_min: interval, cycle_mode: mode }) });
        toast('Slideshow settings saved');
    };
}

async function renderDisplay(el) {
    const settings = await api('/api/settings');
    const flags = settings.meta_flags;
    el.innerHTML = `
        <div class="card">
            <h2>Image Quality</h2>
            <div class="field">
                <select id="imgQuality">
                    <option value="0" ${settings.img_quality===0?'selected':''}>Preview (faster)</option>
                    <option value="1" ${settings.img_quality===1?'selected':''}>Original (higher quality)</option>
                </select>
            </div>
        </div>
        <div class="card">
            <h2>Metadata Overlay</h2>
            <ul class="checkbox-list">
                <li><input type="checkbox" data-flag="1" ${flags&1?'checked':''}><span>Date</span></li>
                <li><input type="checkbox" data-flag="2" ${flags&2?'checked':''}><span>Location</span></li>
                <li><input type="checkbox" data-flag="4" ${flags&4?'checked':''}><span>People</span></li>
                <li><input type="checkbox" data-flag="8" ${flags&8?'checked':''}><span>Album</span></li>
                <li><input type="checkbox" data-flag="16" ${flags&16?'checked':''}><span>Camera</span></li>
            </ul>
            <div class="field">
                <label>Position</label>
                <select id="metaPos">
                    <option value="0" ${settings.meta_pos===0?'selected':''}>Bottom</option>
                    <option value="1" ${settings.meta_pos===1?'selected':''}>Top</option>
                </select>
            </div>
        </div>
        <div class="btn-group"><button class="btn btn-primary" id="saveDisplay">Save</button></div>`;
    document.getElementById('saveDisplay').onclick = async () => {
        let flags = 0;
        el.querySelectorAll('[data-flag]').forEach(cb => { if (cb.checked) flags |= parseInt(cb.dataset.flag); });
        await api('/api/settings', { method: 'POST', body: JSON.stringify({
            img_quality: parseInt(document.getElementById('imgQuality').value),
            meta_flags: flags,
            meta_pos: parseInt(document.getElementById('metaPos').value)
        })});
        toast('Display settings saved');
    };
}

async function renderDevice(el) {
    const settings = await api('/api/settings');
    el.innerHTML = `
        <div class="card">
            <h2>Immich Connection</h2>
            <div class="field">
                <label>Immich URL</label>
                <input type="url" id="immichUrl" value="${settings.immich_url || ''}" placeholder="https://photos.example.com">
            </div>
            <div class="field">
                <label>API Key</label>
                <input type="password" id="immichKey" value="${settings.immich_key || ''}" placeholder="Your Immich API key">
            </div>
            <div class="btn-group">
                <button class="btn btn-primary" id="saveImmich">Save</button>
                <button class="btn" id="testConn">Test Connection</button>
            </div>
            <div id="connStatus" style="margin-top:12px"></div>
        </div>
        <div class="card">
            <h2>Device Actions</h2>
            <div class="btn-group">
                <button class="btn btn-danger" onclick="if(confirm('Enter deep sleep?'))api('/api/action/sleep',{method:'POST'})">Deep Sleep</button>
                <button class="btn btn-danger" onclick="if(confirm('Reboot device?'))fetch('/api/action/reboot',{method:'POST'})">Reboot</button>
            </div>
        </div>`;

    document.getElementById('saveImmich').onclick = async () => {
        const url = document.getElementById('immichUrl').value.trim();
        const key = document.getElementById('immichKey').value.trim();
        if (!url || !key) return toast('URL and API key are required');
        await api('/api/settings', { method: 'POST', body: JSON.stringify({ immich_url: url, immich_key: key }) });
        toast('Immich settings saved. Reboot to apply.');
    };

    document.getElementById('testConn').onclick = async () => {
        const status = document.getElementById('connStatus');
        status.textContent = 'Testing...';
        status.style.color = '';
        try {
            const result = await api('/api/test-connection', { method: 'POST' });
            status.textContent = result.msg;
            status.style.color = result.ok ? '#2e7d32' : '#c62828';
        } catch (e) {
            status.textContent = 'Request failed: ' + e.message;
            status.style.color = '#c62828';
        }
    };
}

async function renderFirmware(el) {
    el.innerHTML = `
        <div class="card">
            <h2>Firmware Update</h2>
            <div class="field">
                <label>Upload .bin file</label>
                <input type="file" id="fwFile" accept=".bin">
            </div>
            <button class="btn btn-primary" id="uploadFw">Upload & Flash</button>
            <div id="fwStatus" style="margin-top:12px"></div>
        </div>`;
    document.getElementById('uploadFw').onclick = async () => {
        const file = document.getElementById('fwFile').files[0];
        if (!file) return toast('Select a file first');
        const formData = new FormData();
        formData.append('firmware', file);
        document.getElementById('fwStatus').textContent = 'Uploading...';
        const res = await fetch('/api/firmware', { method: 'POST', body: formData });
        const data = await res.json();
        document.getElementById('fwStatus').textContent = data.msg || (data.ok ? 'Success!' : 'Failed');
    };
}

// Navigation
document.querySelectorAll('#nav-links a').forEach(a => {
    a.addEventListener('click', (e) => { e.preventDefault(); navigate(a.dataset.page); });
});

// Initial render
navigate('dashboard');