/* ===== Dashboard (대시보드) ===== */

const today = new Date().toISOString().substring(0, 10);

function updateDateTime() {
    const now = new Date();
    const days = ['일', '월', '화', '수', '목', '금', '토'];
    const h = String(now.getHours()).padStart(2, '0');
    const m = String(now.getMinutes()).padStart(2, '0');
    const el = document.getElementById('dateTimeDisplay');
    if (el) el.textContent = `${now.getFullYear()}년 ${now.getMonth()+1}월 ${now.getDate()}일 (${days[now.getDay()]}) ${h}:${m}`;
}

async function loadDashboard() {
    updateDateTime();

    const results = await Promise.allSettled([
        api('/tbm/sessions/date/' + today).catch(() => ({ data: [] })),
        api('/notifications/unread').catch(() => ({ data: [] })),
        api('/equipments/repair-requests?status=pending').catch(() => ({ data: [] })),
        api('/attendance/today-summary').catch(() => ({ data: {} })),
    ]);

    const tbmData = results[0].status === 'fulfilled' ? results[0].value : { data: [] };
    const notifData = results[1].status === 'fulfilled' ? results[1].value : { data: [] };
    const repairData = results[2].status === 'fulfilled' ? results[2].value : { data: [] };
    const attendData = results[3].status === 'fulfilled' ? results[3].value : { data: {} };

    const tbmSessions = tbmData.data || [];
    const notifications = notifData.data || [];
    const repairs = repairData.data || [];
    const attendance = attendData.data || {};

    // Stats
    document.getElementById('statTbm').textContent = tbmSessions.length;
    document.getElementById('statWorkers').textContent = attendance.checked_in_count || 0;
    document.getElementById('statRepairs').textContent = repairs.length;
    document.getElementById('statNotifications').textContent = notifications.length;

    // TBM list
    renderTbmList(tbmSessions);
    renderNotificationList(notifications);
    renderRepairList(repairs);
}

function renderTbmList(sessions) {
    const el = document.getElementById('tbmList');
    if (!sessions.length) {
        el.innerHTML = '<p class="text-gray-400 text-sm text-center py-4">금일 TBM이 없습니다</p>';
        return;
    }
    el.innerHTML = sessions.slice(0, 5).map(s => {
        const workers = s.team_member_count || 0;
        return `<div class="flex items-center justify-between p-3 bg-gray-50 rounded-lg">
            <div>
                <div class="text-sm font-medium text-gray-800">${escapeHtml(s.workplace_name || s.session_title || 'TBM')}</div>
                <div class="text-xs text-gray-500">${escapeHtml(s.leader_name || '-')} · ${workers}명</div>
            </div>
            <span class="badge ${s.status === 'completed' ? 'badge-green' : 'badge-amber'}">${s.status === 'completed' ? '완료' : '진행중'}</span>
        </div>`;
    }).join('');
    if (sessions.length > 5) {
        el.innerHTML += `<a href="/pages/work/tbm.html" class="block text-center text-xs text-orange-600 hover:text-orange-700 mt-2">전체 보기 (${sessions.length}건)</a>`;
    }
}

function renderNotificationList(notifications) {
    const el = document.getElementById('notificationList');
    if (!notifications.length) {
        el.innerHTML = '<p class="text-gray-400 text-sm text-center py-4">새 알림이 없습니다</p>';
        return;
    }
    const icons = { repair: 'fa-wrench text-amber-500', safety: 'fa-shield-alt text-red-500', system: 'fa-bell text-blue-500', equipment: 'fa-cog text-gray-500', maintenance: 'fa-tools text-green-500' };
    el.innerHTML = notifications.slice(0, 5).map(n => {
        const iconClass = icons[n.type] || 'fa-bell text-gray-400';
        return `<div class="flex items-start gap-3 p-3 bg-gray-50 rounded-lg cursor-pointer hover:bg-gray-100" onclick="location.href='/pages/admin/notifications.html'">
            <i class="fas ${iconClass} mt-0.5"></i>
            <div class="flex-1 min-w-0">
                <div class="text-sm font-medium text-gray-800 truncate">${escapeHtml(n.title)}</div>
                <div class="text-xs text-gray-500 mt-0.5">${formatTimeAgo(n.created_at)}</div>
            </div>
        </div>`;
    }).join('');
}

function renderRepairList(repairs) {
    const el = document.getElementById('repairList');
    if (!repairs.length) {
        el.innerHTML = '<p class="text-gray-400 text-sm text-center py-4">대기 중인 수리 요청이 없습니다</p>';
        return;
    }
    el.innerHTML = repairs.slice(0, 5).map(r => {
        return `<div class="flex items-center justify-between p-3 bg-gray-50 rounded-lg">
            <div>
                <div class="text-sm font-medium text-gray-800">${escapeHtml(r.equipment_name || r.title || '수리 요청')}</div>
                <div class="text-xs text-gray-500">${formatDate(r.created_at)}</div>
            </div>
            <span class="badge badge-red">대기</span>
        </div>`;
    }).join('');
    if (repairs.length > 5) {
        el.innerHTML += `<a href="/pages/admin/repair-management.html" class="block text-center text-xs text-orange-600 hover:text-orange-700 mt-2">전체 보기 (${repairs.length}건)</a>`;
    }
}

function formatTimeAgo(dateStr) {
    if (!dateStr) return '';
    const d = new Date(dateStr);
    const now = new Date();
    const diff = now - d;
    const mins = Math.floor(diff / 60000);
    const hours = Math.floor(diff / 3600000);
    const days = Math.floor(diff / 86400000);
    if (mins < 1) return '방금 전';
    if (mins < 60) return `${mins}분 전`;
    if (hours < 24) return `${hours}시간 전`;
    if (days < 7) return `${days}일 전`;
    return formatDate(dateStr);
}

/* ===== Init ===== */
(async function() {
    if (!await initAuth()) return;
    updateDateTime();
    setInterval(updateDateTime, 60000);
    loadDashboard();
})();