// The homepage front end. It reads status.json and services.json once on load
// (no auto-refresh, Q41), renders the services for this page's category as
// sectioned grids of TUI panels, offers the styling toggle (Q27), and shows
// the last master deployment datetime (Q43). It never alters the user's
// cursor (Q28).

const CATEGORY = window.location.pathname.indexOf('/admin') !== -1 ? 'admin' : 'user';

// Sections and panels are shared components: both pages render through the
// same renderSection()/renderPanel() below. SECTION_ORDER fixes each page's
// section order; a section with no services renders nothing.
const SECTION_ORDER = {
    user: ['Web Apps', 'Media Library Apps', 'AI'],
    admin: ['Media Library Apps', 'Observability', 'AI', 'Infrastructure'],
};

const BADGE_LABEL = {
    up: 'UP',
    down: 'DOWN',
    'wip-open': 'WIP: OPEN',
    'wip-closed': 'WIP: CLOSED',
    'wip-down': 'WIP: DOWN',
};

function load(url) {
    return fetch(url, { cache: 'no-store' }).then(function (r) { return r.json(); });
}

function esc(s) {
    return String(s).replace(/[&<>"']/g, function (c) {
        return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[c];
    });
}

// The plain description for ordinary panels. (Model cards render through
// renderModelInfo below, not through descHTML.)
function descHTML(svc) {
    const d = svc.details;
    if (d && (d.role || d.spec || d.inputs || d.use)) {
        const lines = [];
        if (d.role) lines.push('<div class="desc-role">' + esc(d.role) + '</div>');
        if (d.spec) lines.push('<div class="desc-spec">' + esc(d.spec) + '</div>');
        if (d.inputs && d.inputs.length) lines.push('<div class="desc-inputs">Inputs: ' + esc(d.inputs.join(' · ')) + '</div>');
        if (d.use) lines.push('<div class="desc-use">Use: ' + esc(d.use) + '</div>');
        return lines.join('');
    }
    return esc(svc.description || '');
}

// The Model Information component: one panel fusing every fleet model card.
// Each model is an informational sub-card (smaller type, Protoss unit art,
// unit-coloured flair); the quoted lines are buttons that play the matching
// StarCraft unit voice from /sfx/. Audio files are sequential: a click plays
// the whole queue (the Dragoon tagline is two lines spliced).
let sfxQueue = [];
let sfxPlaying = false;

function playSfx(files, el) {
    sfxQueue = sfxQueue.concat(files);
    if (sfxPlaying) return;
    sfxPlaying = true;
    el.classList.add('mi-speaking');
    const next = function () {
        const f = sfxQueue.shift();
        if (!f) { sfxPlaying = false; el.classList.remove('mi-speaking'); return; }
        const a = new Audio('/sfx/' + f);
        a.volume = 0.5;
        a.onended = next;
        a.onerror = next;
        a.play().then(function () {}, next);
    };
    next();
}

function voiceBtn(text, files) {
    return '<button type="button" class="mi-voice" title="play voice" ' +
        'data-sfx="' + esc(files.join(',')) + '">&#9654; ' + esc(text) + '</button>';
}

function miCard(svc, state) {
    const m = svc.model;
    const parts = ['<div class="mi-top">' +
        '<img class="mi-art" src="/img/unit-' + esc(m.unit) + '.jpg" alt="' + esc(m.unit) + '">' +
        '<div class="mi-head"><div class="mi-id"><span class="badge ' + state + '">' + BADGE_LABEL[state] + '</span>' +
        '<span class="mi-name">' + esc(svc.name) + '</span></div>' +
        '<div class="mi-role">' + esc(m.role) + '</div>' +
        (m.hf ? '<a class="mi-hf" href="' + esc(m.hf) +
            '" target="_blank" rel="noopener">model on huggingface &#8599;</a>' : '') +
        '</div></div>',
        voiceBtn(m.tagline, m.sfx)
    ];
    if (m.equiv) parts.push('<div class="mi-equiv">' + esc(m.equiv) + '</div>');
    if (m.spec) parts.push('<div class="mi-spec">' + esc(m.spec) + '</div>');
    if (m.inputs && m.inputs.length) parts.push('<div class="mi-inputs">Inputs: ' + esc(m.inputs.join(' · ')) + '</div>');
    if (m.use) parts.push('<div class="mi-use">Use: ' + esc(m.use) + '</div>');
    if (m.compaction) parts.push('<div class="mi-comp">&#9889; ' + esc(m.compaction) + '</div>');
    if (m.supervision) parts.push('<div class="mi-super">' + esc(m.supervision) + '</div>');
    if (m.permission) parts.push('<div class="mi-perm">&#9888; ' + esc(m.permission) + '</div>');
    if (m.warn) parts.push('<details class="mi-warn"><summary>&#9888; privacy note</summary>' +
        '<div class="warn-body">' + esc(m.warn) + '</div></details>');
    const card = document.createElement('article');
    card.className = 'mi-card mi-' + esc(m.unit);
    card.innerHTML = parts.join('');
    return card;
}

function renderModelInfo(models) {
    const panel = document.createElement('div');
    panel.className = 'panel model-info';
    const head = document.createElement('div');
    head.className = 'mi-title';
    const title = document.createElement('span');
    title.textContent = 'Model Information';
    head.appendChild(title);
    const docsLink = document.createElement('a');
    docsLink.className = 'mi-docs-link';
    docsLink.href = '/docs#models';
    docsLink.textContent = 'AI guide \u2192';
    head.appendChild(docsLink);
    panel.appendChild(head);
    const grid = document.createElement('div');
    grid.className = 'mi-grid';
    for (const m of models) grid.appendChild(m.el);
    panel.appendChild(grid);
    panel.addEventListener('click', function (ev) {
        const btn = ev.target.closest('.mi-voice');
        if (btn) playSfx(btn.getAttribute('data-sfx').split(','), btn);
    });
    return panel;
}

// Shared panel component: one TUI panel for a service in a given state.
function renderPanel(svc, state) {
    const panel = document.createElement('div');
    panel.className = 'panel ' + state;
    const links = [];
    if (svc.showLink && svc.url) links.push('<a class="open" href="' + esc(svc.url) + '">open</a>');
    if (svc.docs) links.push('<a class="docs" href="' + esc(svc.docs) + '">docs</a>');
    const art = svc.art ? '<img class="app-art" src="' + esc(svc.art) + '" alt=""' +
        (svc.art_bg ? ' style="background:' + esc(svc.art_bg) + ';border-color:' + esc(svc.art_bg) + '"' : '') + '>' : '';
    const warn = svc.warn
        ? '<details class="svc-warn"><summary>&#9888; privacy note</summary>' +
          '<div class="warn-body">' + esc(svc.warn) + '</div></details>'
        : '';
    panel.innerHTML =
        '<div class="panel-head">' + art +
        '  <span class="badge ' + state + '">' + BADGE_LABEL[state] + '</span>' +
        '  <span class="name">' + esc(svc.name) + '</span>' +
        '</div>' +
        '<div class="desc">' + descHTML(svc) + '</div>' +
        '<div class="links">' + links.join('') + '</div>' + warn;
    if (svc.showLink && svc.url) {
        panel.classList.add('clickable');
        panel.addEventListener('click', function (ev) {
            if (ev.target.closest('a, .svc-warn')) return;
        });
    }
    return panel;
}

// Shared section component: a heading over a grid of panels.
function renderSection(title, panels) {
    const section = document.createElement('section');
    section.className = 'section';
    const heading = document.createElement('h2');
    heading.className = 'section-title';
    heading.textContent = title;
    const grid = document.createElement('div');
    grid.className = 'grid';
    for (const panel of panels) grid.appendChild(panel);
    section.appendChild(heading);
    section.appendChild(grid);
    return section;
}

function renderPanels(services, status) {
    const stateByName = {};
    for (const s of (status.services || [])) stateByName[s.name] = s.state;

    const root = document.getElementById('grid');
    root.innerHTML = '';
    let up = 0, down = 0, wip = 0;

    const bySection = {};
    const modelsBySection = {};
    for (const svc of services) {
        if (svc.category !== CATEGORY) continue;
        const state = svc.wip ? 'wip-' + svc.wip : (stateByName[svc.name] || 'down');
        if (state === 'up') up++; else if (state === 'down') down++; else wip++;
        if (svc.model) {
            (modelsBySection[svc.section] = modelsBySection[svc.section] || []).push({ svc: svc, el: miCard(svc, state) });
            continue;
        }
        (bySection[svc.section] = bySection[svc.section] || []).push(renderPanel(svc, state));
    }

    for (const title of SECTION_ORDER[CATEGORY]) {
        const panels = bySection[title] || [];
        if (modelsBySection[title]) panels.push(renderModelInfo(modelsBySection[title]));
        if (panels.length) root.appendChild(renderSection(title, panels));
    }

    document.getElementById('summary').textContent = 'UP ' + up + '   DOWN ' + down + '   WIP ' + wip;
}

// The styling toggle (Q27): ?bare=1 strips the page to bare, unstyled HTML.
function applyBare() {
    const bare = new URLSearchParams(window.location.search).get('bare') === '1';
    document.documentElement.setAttribute('data-bare', bare ? '1' : '0');
    const t = document.getElementById('bare-toggle');
    if (t) {
        t.textContent = bare ? 'styled' : 'bare';
        t.href = bare ? '?bare=0' : '?bare=1';
    }
}

// The last master deployment datetime (Q43), baked in at deploy time.
function fillDeployed() {
    const el = document.getElementById('deployed-at');
    if (el && window.DEPLOYED_AT) el.textContent = window.DEPLOYED_AT;
}

// Show the admin button only to members of the authentik homepage-admins
// group (the same group the /admin* server gate enforces). The data comes
// from Caddy's /whoami, which echoes the outpost-injected identity headers.
function gateAdminLink() {
    const link = document.getElementById('admin-link');
    if (!link) return;
    fetch('/whoami', { headers: { accept: 'application/json' } })
        .then(function (r) { return r.ok ? r.json() : null; })
        .then(function (me) {
            if (me && /homepage-admins/i.test(me.groups || '')) link.hidden = false;
        })
        .catch(function () {});
}

function main() {
    applyBare();
    fillDeployed();
    gateAdminLink();

    Promise.all([load('services.json'), load('status.json')])
        .then(function (pair) { renderPanels(pair[0], pair[1]); })
        .catch(function (e) {
            document.getElementById('summary').textContent = 'status unavailable: ' + e;
        });
}

main();