/**
 * Kanbante — dashboard display tools (issues #21, #22, #23).
 * Sort + group-by-owner for the card grids, sortable dense tables,
 * and the per-card quick-actions menu. Preferences live in
 * localStorage; the server markup stays the single source.
 */
(function () {
    var LS_SORT = 'kanbante-dash-sort';
    var LS_GROUP = 'kanbante-dash-group';
    var LS_OWNERS = 'kanbante-dash-owners-closed';

    function lsGet(key, fallback) {
        try {
            var v = localStorage.getItem(key);
            return v === null ? fallback : v;
        } catch (e) { return fallback; }
    }
    function lsSet(key, value) {
        try { localStorage.setItem(key, value); } catch (e) { /* non-fatal */ }
    }

    /* ── Tri des grilles de cartes ─────────────────────────── */
    var sortSelect = document.getElementById('dash-sort');
    // 0.20.1 : la grille des Épinglés est incluse — l'exclure
    // (choix de la 0.18.0) donnait l'impression que le tri et le
    // regroupement « ne faisaient rien », la section épinglée
    // étant celle qu'on regarde en premier.
    var grids = ['pinned-grid', 'grid-active', 'grid-inactive', 'grid-archived']
        .map(function (id) { return document.getElementById(id); })
        .filter(Boolean);

    function cardKey(card, mode) {
        if (mode === 'name') return (card.getAttribute('data-name') || '').toLowerCase();
        if (mode === 'open') return -(parseInt(card.getAttribute('data-open') || '0', 10));
        if (mode === 'updated') return card.getAttribute('data-updated') || '';
        if (mode === 'activity') return card.getAttribute('data-activity') || '';
        return null; // 'default' : ordre serveur, on ne touche à rien
    }
    function sortCards(container, mode) {
        var cards = Array.prototype.slice.call(
            container.querySelectorAll('.project-card'));
        if (mode === 'default' || !cards.length) return;
        cards.sort(function (a, b) {
            var ka = cardKey(a, mode), kb = cardKey(b, mode);
            if (mode === 'updated' || mode === 'activity') {
                // Comparaison en instants réels (les fuseaux des
                // dates Gitea varient, -04:00/-05:00) ; une carte
                // sans date coule en bas du tri décroissant.
                var ta = Date.parse(ka), tb = Date.parse(kb);
                if (isNaN(ta) && isNaN(tb)) return 0;
                if (isNaN(ta)) return 1;
                if (isNaN(tb)) return -1;
                return tb - ta;
            }
            if (ka < kb) return mode === 'name' ? -1 : 1;
            if (ka > kb) return mode === 'name' ? 1 : -1;
            return 0;
        });
        cards.forEach(function (c) { container.appendChild(c); });
    }
    function applySort() {
        var mode = sortSelect ? sortSelect.value : 'default';
        lsSet(LS_SORT, mode);
        grids.forEach(function (grid) {
            if (groupToggle && groupToggle.checked) {
                grid.querySelectorAll('.owner-grid').forEach(function (og) {
                    sortCards(og, mode);
                });
            } else {
                sortCards(grid, mode);
            }
        });
    }

    /* ── Regroupement par propriétaire ─────────────────────── */
    var groupToggle = document.getElementById('dash-group');
    function closedOwners() {
        try { return JSON.parse(lsGet(LS_OWNERS, '[]')); } catch (e) { return []; }
    }
    function setOwnerClosed(owner, closed) {
        var list = closedOwners().filter(function (o) { return o !== owner; });
        if (closed) list.push(owner);
        lsSet(LS_OWNERS, JSON.stringify(list));
    }
    function groupGrid(grid) {
        var cards = Array.prototype.slice.call(
            grid.querySelectorAll(':scope > .project-card'));
        if (!cards.length) return;
        var byOwner = {};
        cards.forEach(function (c) {
            var o = c.getAttribute('data-owner') || '—';
            (byOwner[o] = byOwner[o] || []).push(c);
        });
        Object.keys(byOwner).sort().forEach(function (owner) {
            var wrap = document.createElement('div');
            wrap.className = 'owner-group';
            var head = document.createElement('button');
            head.type = 'button';
            head.className = 'owner-head';
            var closed = closedOwners().indexOf(owner) >= 0;
            head.setAttribute('aria-expanded', closed ? 'false' : 'true');
            head.innerHTML = '<span>🗂️ ' + owner + ' (' + byOwner[owner].length + ')</span><span class="owner-chevron">▾</span>';
            var body = document.createElement('div');
            body.className = 'project-grid owner-grid';
            if (closed) body.hidden = true;
            head.addEventListener('click', function () {
                body.hidden = !body.hidden;
                head.setAttribute('aria-expanded', body.hidden ? 'false' : 'true');
                setOwnerClosed(owner, body.hidden);
            });
            byOwner[owner].forEach(function (c) { body.appendChild(c); });
            wrap.appendChild(head);
            wrap.appendChild(body);
            grid.appendChild(wrap);
        });
    }
    function ungroupGrid(grid) {
        grid.querySelectorAll('.owner-group').forEach(function (wrap) {
            var body = wrap.querySelector('.owner-grid');
            Array.prototype.slice.call(body.querySelectorAll('.project-card'))
                .forEach(function (c) { grid.appendChild(c); });
            wrap.remove();
        });
    }
    function applyGrouping() {
        var on = !!(groupToggle && groupToggle.checked);
        lsSet(LS_GROUP, on ? '1' : '0');
        grids.forEach(function (grid) {
            ungroupGrid(grid);
            if (on) groupGrid(grid);
        });
        applySort();
    }

    if (sortSelect) {
        sortSelect.value = lsGet(LS_SORT, 'default');
        sortSelect.addEventListener('change', applySort);
    }
    if (groupToggle) {
        groupToggle.checked = lsGet(LS_GROUP, '0') === '1';
        groupToggle.addEventListener('change', applyGrouping);
    }
    applyGrouping(); // applique regroupement + tri mémorisés

    /* ── Menu ⋯ d'actions rapides (#23) ────────────────────── */
    function closeMenus() {
        document.querySelectorAll('.card-menu').forEach(function (m) {
            m.hidden = true;
        });
        document.querySelectorAll('[data-menu-btn]').forEach(function (b) {
            b.setAttribute('aria-expanded', 'false');
        });
    }
    document.querySelectorAll('[data-menu-btn]').forEach(function (btn) {
        btn.addEventListener('click', function (e) {
            e.stopPropagation();
            var menu = btn.parentElement.querySelector('.card-menu');
            var willOpen = menu.hidden;
            closeMenus();
            if (willOpen) {
                menu.hidden = false;
                btn.setAttribute('aria-expanded', 'true');
            }
        });
    });
    document.addEventListener('click', closeMenus);
    document.addEventListener('keydown', function (e) {
        if (e.key === 'Escape') closeMenus();
    });

    /* Le tri des tableaux denses (#22) vit dans tablesort.js,
       partagé avec /forecast et /health (0.19.0). */
})();