/**
 * Kanbante — Command palette (Ctrl+K), roadmap #10.
 *
 * One overlay for the whole app: static actions, every project, and
 * global issue search (via /api/palette). Fully keyboard driven.
 */
(function () {
    var overlay = document.getElementById('palette-overlay');
    if (!overlay) return;
    var input = document.getElementById('palette-input');
    var list = document.getElementById('palette-results');

    var ACTIONS = [
        { icon: '🏠', label: 'Projets — dashboard', href: '/' },
        { icon: '🎯', label: 'Focus — en cours, QA, révision', href: '/focus' },
        { icon: '🌅', label: "Focus du jour — les 3 cartes d'aujourd'hui", href: '/today' },
        { icon: '🔮', label: 'Prévisions — on finit quand ?', href: '/forecast' },
        { icon: '🗣️', label: 'Standup automatique — hier, aujourd\'hui, blocages', href: '/standup' },
        { icon: '⚙️', label: 'Règles d\'automatisation', href: '/rules' },
        { icon: '🩺', label: 'Santé du flux — goulots et zombies', href: '/health' },
        { icon: '👤', label: 'Mes issues', href: '/my' },
        { icon: '📰', label: 'Activité — journal des événements', href: '/activity' },
        { icon: '📊', label: 'Briefing quotidien', href: '/briefing' },
        { icon: '⚡', label: 'Capture éclair — nouvelle idée', href: '/capture' },
        { icon: '📥', label: 'Mode Triage — vider un backlog au clavier', href: '/triage' },
        { icon: '🧠', label: 'Digest hebdo — vers ObsiGate', href: '/digest' },
        { icon: '🖥️', label: 'Wallboard — mode TV', href: '/wall' },
        { icon: '🔍', label: 'Recherche avancée', href: '/search' },
    ];

    var projects = null;   // cached after first fetch
    var issues = [];       // latest search results for the query
    var items = [];        // rendered items
    var activeIndex = 0;
    var debounce = null;
    var lastQuery = '';

    function open() {
        overlay.hidden = false;
        document.body.style.overflow = 'hidden';
        input.value = '';
        issues = [];
        lastQuery = '';
        render('');
        input.focus();
        if (projects === null) {
            fetch('/api/palette')
                .then(function (r) { return r.json(); })
                .then(function (data) {
                    projects = data.projects || [];
                    render(input.value.trim());
                })
                .catch(function () { projects = []; });
        }
    }

    function close() {
        overlay.hidden = true;
        document.body.style.overflow = '';
    }

    function buildItems(query) {
        var q = query.toLowerCase();
        var out = [];
        ACTIONS.forEach(function (a) {
            if (!q || a.label.toLowerCase().includes(q)) {
                out.push({ icon: a.icon, label: a.label, sub: 'Action', href: a.href });
            }
        });
        (projects || []).forEach(function (p) {
            if (out.length >= 14) return;
            if (!q || p.full_name.toLowerCase().includes(q)) {
                out.push({
                    icon: '📂', label: p.full_name, sub: 'Projet · ouvrir le board',
                    href: '/board/' + p.full_name,
                });
            }
        });
        issues.forEach(function (i) {
            out.push({
                icon: '🐛',
                label: '#' + i.number + ' · ' + i.title,
                sub: i.repo + ' · ' + i.column_label + (i.state === 'closed' ? ' · fermée' : ''),
                href: '/board/' + i.repo,
            });
        });
        return out.slice(0, 14);
    }

    function render(query) {
        items = buildItems(query);
        activeIndex = Math.min(activeIndex, Math.max(0, items.length - 1));
        list.innerHTML = '';
        if (!items.length) {
            var empty = document.createElement('li');
            empty.className = 'palette-empty';
            empty.textContent = 'Aucun résultat — essaie un nom de projet ou un mot du titre d\'une issue.';
            list.appendChild(empty);
            return;
        }
        items.forEach(function (item, idx) {
            var li = document.createElement('li');
            li.className = 'palette-item' + (idx === activeIndex ? ' active' : '');
            var icon = document.createElement('span');
            icon.className = 'palette-item-icon';
            icon.textContent = item.icon;
            var main = document.createElement('span');
            main.className = 'palette-item-main';
            main.textContent = item.label;
            var sub = document.createElement('span');
            sub.className = 'palette-item-sub';
            sub.textContent = item.sub;
            li.appendChild(icon);
            li.appendChild(main);
            li.appendChild(sub);
            li.addEventListener('click', function () { go(item); });
            li.addEventListener('mousemove', function () {
                if (activeIndex !== idx) { activeIndex = idx; render(input.value.trim()); }
            });
            list.appendChild(li);
        });
    }

    function go(item) {
        if (item) window.location.href = item.href;
    }

    function searchIssues(query) {
        if (query.length < 2) { issues = []; render(query); return; }
        fetch('/api/palette?q=' + encodeURIComponent(query))
            .then(function (r) { return r.json(); })
            .then(function (data) {
                if (input.value.trim() !== query) return;  // stale response
                issues = data.issues || [];
                if (projects === null) projects = data.projects || [];
                render(query);
            })
            .catch(function () { /* keep previous results */ });
    }

    input.addEventListener('input', function () {
        var query = input.value.trim();
        activeIndex = 0;
        render(query);
        if (query !== lastQuery) {
            lastQuery = query;
            clearTimeout(debounce);
            debounce = setTimeout(function () { searchIssues(query); }, 180);
        }
    });

    input.addEventListener('keydown', function (e) {
        if (e.key === 'ArrowDown') {
            e.preventDefault();
            activeIndex = Math.min(activeIndex + 1, items.length - 1);
            render(input.value.trim());
        } else if (e.key === 'ArrowUp') {
            e.preventDefault();
            activeIndex = Math.max(activeIndex - 1, 0);
            render(input.value.trim());
        } else if (e.key === 'Enter') {
            e.preventDefault();
            go(items[activeIndex]);
        }
    });

    overlay.addEventListener('click', function (e) {
        if (e.target === overlay) close();
    });

    document.addEventListener('keydown', function (e) {
        var combo = (e.ctrlKey || e.metaKey) && e.key.toLowerCase() === 'k';
        if (combo) {
            e.preventDefault();
            if (overlay.hidden) open(); else close();
        } else if (e.key === 'Escape' && !overlay.hidden) {
            close();
        }
    });

    document.querySelectorAll('.palette-trigger').forEach(function (btn) {
        btn.addEventListener('click', function () { open(); });
    });
})();