/* meeting-detail.js — 회의록 상세/작성 */

let meetingId = null;
let meetingData = null;
let selectedAttendees = []; // [{user_id, name, username}]
let projects = [];
let users = [];
let canEdit = false;
let isAdmin = false;
let isPublished = false;

document.addEventListener('DOMContentLoaded', async () => {
    const ok = await initAuth();
    if (!ok) return;
    document.querySelector('.fade-in').classList.add('visible');

    const role = currentUser?.role || '';
    canEdit = ['support_team', 'admin', 'system', 'system admin'].includes(role);
    isAdmin = ['admin', 'system', 'system admin'].includes(role);

    // Parse URL
    const params = new URLSearchParams(location.search);
    meetingId = params.get('id');

    // Load master data
    try {
        const [projRes, userRes] = await Promise.all([
            api('/projects'),
            api('/users')
        ]);
        projects = projRes.data || [];
        users = (userRes.data || []).filter(u => u.is_active !== 0);
    } catch {}

    // Populate project select in item modal
    const projSel = document.getElementById('itemProject');
    projects.forEach(p => {
        projSel.innerHTML += `<option value="${p.project_id}">${escapeHtml(p.job_no)} ${escapeHtml(p.project_name)}</option>`;
    });

    // Populate responsible user select
    const respSel = document.getElementById('itemResponsible');
    users.forEach(u => {
        respSel.innerHTML += `<option value="${u.user_id}">${escapeHtml(u.name)} (${escapeHtml(u.username)})</option>`;
    });

    // Attendee search
    const searchInput = document.getElementById('attendeeSearch');
    const resultsDiv = document.getElementById('attendeeResults');
    searchInput.addEventListener('input', debounce(() => {
        const q = searchInput.value.trim().toLowerCase();
        if (q.length < 1) { resultsDiv.classList.add('hidden'); return; }
        const matches = users.filter(u =>
            !selectedAttendees.some(a => a.user_id === u.user_id) &&
            (u.name?.toLowerCase().includes(q) || u.username?.toLowerCase().includes(q))
        ).slice(0, 10);
        if (matches.length === 0) { resultsDiv.classList.add('hidden'); return; }
        resultsDiv.innerHTML = matches.map(u =>
            `<div class="user-search-item" onclick="addAttendee(${u.user_id}, '${escapeHtml(u.name)}', '${escapeHtml(u.username)}')">${escapeHtml(u.name)} <span class="text-gray-400">(${escapeHtml(u.username)})</span></div>`
        ).join('');
        resultsDiv.classList.remove('hidden');
    }, 200));
    searchInput.addEventListener('blur', () => setTimeout(() => resultsDiv.classList.add('hidden'), 200));

    if (meetingId) {
        await loadMeeting();
    } else {
        // New meeting
        document.getElementById('meetingDate').value = new Date().toISOString().split('T')[0];
        updateUI();
    }
});

async function loadMeeting() {
    try {
        const res = await api(`/meetings/${meetingId}`);
        meetingData = res.data;
        isPublished = meetingData.status === 'published';

        document.getElementById('pageTitle').textContent = meetingData.title;
        document.getElementById('meetingDate').value = formatDate(meetingData.meeting_date);
        document.getElementById('meetingTime').value = meetingData.meeting_time || '';
        document.getElementById('meetingTitle').value = meetingData.title;
        document.getElementById('meetingLocation').value = meetingData.location || '';
        document.getElementById('meetingSummary').value = meetingData.summary || '';

        // Status badge
        const badge = document.getElementById('statusBadge');
        badge.classList.remove('hidden');
        if (isPublished) {
            badge.className = 'badge badge-green';
            badge.textContent = '발행';
        } else {
            badge.className = 'badge badge-gray';
            badge.textContent = '초안';
        }

        // Attendees
        selectedAttendees = (meetingData.attendees || []).map(a => ({
            user_id: a.user_id, name: a.name, username: a.username
        }));
        renderAttendees();

        // Agenda items
        renderAgendaItems(meetingData.items || []);
        updateUI();
    } catch (err) {
        showToast('회의록 로드 실패: ' + err.message, 'error');
    }
}

function updateUI() {
    const editable = canEdit && (!isPublished || isAdmin);
    // Fields
    ['meetingDate', 'meetingTime', 'meetingTitle', 'meetingLocation', 'meetingSummary', 'attendeeSearch'].forEach(id => {
        const el = document.getElementById(id);
        if (el) { el.disabled = !editable; if (!editable) el.classList.add('bg-gray-100'); }
    });

    // Buttons
    document.getElementById('btnSave').classList.toggle('hidden', !editable);
    document.getElementById('btnAddItem').classList.toggle('hidden', !editable);
    document.getElementById('btnPublish').classList.toggle('hidden', !canEdit || isPublished || !meetingId);
    document.getElementById('btnUnpublish').classList.toggle('hidden', !isAdmin || !isPublished);
    document.getElementById('btnDelete').classList.toggle('hidden', !isAdmin || !meetingId);
}

/* ===== Attendees ===== */
function addAttendee(userId, name, username) {
    if (selectedAttendees.some(a => a.user_id === userId)) return;
    selectedAttendees.push({ user_id: userId, name, username });
    renderAttendees();
    document.getElementById('attendeeSearch').value = '';
    document.getElementById('attendeeResults').classList.add('hidden');
}

function removeAttendee(userId) {
    selectedAttendees = selectedAttendees.filter(a => a.user_id !== userId);
    renderAttendees();
}

function renderAttendees() {
    const container = document.getElementById('attendeeTags');
    const editable = canEdit && (!isPublished || isAdmin);
    container.innerHTML = selectedAttendees.map(a =>
        `<span class="attendee-tag">${escapeHtml(a.name)}${editable ? ` <span class="remove-btn" onclick="removeAttendee(${a.user_id})">×</span>` : ''}</span>`
    ).join('');
}

/* ===== Agenda Items ===== */
function renderAgendaItems(items) {
    const list = document.getElementById('agendaList');
    const empty = document.getElementById('agendaEmpty');

    if (items.length === 0) {
        list.innerHTML = '';
        empty.classList.remove('hidden');
        return;
    }
    empty.classList.add('hidden');

    const typeLabels = { schedule_update: '공정현황', issue: '이슈', decision: '결정사항', action_item: '조치사항', other: '기타' };
    const typeColors = { schedule_update: 'badge-blue', issue: 'badge-red', decision: 'badge-green', action_item: 'badge-amber', other: 'badge-gray' };
    const statusLabels = { open: '미처리', in_progress: '진행중', completed: '완료', cancelled: '취소' };
    const statusColors = { open: 'badge-amber', in_progress: 'badge-blue', completed: 'badge-green', cancelled: 'badge-gray' };

    const editable = canEdit && (!isPublished || isAdmin);
    const canUpdateStatus = ['group_leader', 'support_team', 'admin', 'system', 'system admin'].includes(currentUser?.role || '');

    list.innerHTML = items.map(item => `
        <div class="border rounded-lg p-4">
            <div class="flex items-start justify-between gap-2 mb-2">
                <div class="flex items-center gap-2 flex-wrap">
                    <span class="badge ${typeColors[item.item_type] || 'badge-gray'}">${typeLabels[item.item_type] || item.item_type}</span>
                    <span class="badge ${statusColors[item.status] || 'badge-gray'}">${statusLabels[item.status] || item.status}</span>
                    ${item.project_code ? `<span class="text-xs text-gray-400">${escapeHtml(item.project_code)}</span>` : ''}
                    ${item.milestone_name ? `<span class="text-xs text-purple-500">◆ ${escapeHtml(item.milestone_name)}</span>` : ''}
                </div>
                <div class="flex items-center gap-1 flex-shrink-0">
                    ${canUpdateStatus && item.status !== 'completed' ? `<select class="text-xs border rounded px-1 py-0.5" onchange="updateItemStatus(${item.item_id}, this.value)">
                        <option value="">상태변경</option>
                        <option value="in_progress">진행중</option>
                        <option value="completed">완료</option>
                    </select>` : ''}
                    ${editable ? `<button onclick="openItemModal(${item.item_id})" class="text-gray-400 hover:text-orange-600 text-xs px-1"><i class="fas fa-edit"></i></button>
                    <button onclick="deleteItem(${item.item_id})" class="text-gray-400 hover:text-red-600 text-xs px-1"><i class="fas fa-trash"></i></button>` : ''}
                </div>
            </div>
            <p class="text-sm text-gray-800 mb-1">${escapeHtml(item.content)}</p>
            ${item.decision ? `<p class="text-sm text-green-700 bg-green-50 rounded p-2 mb-1"><strong>결정:</strong> ${escapeHtml(item.decision)}</p>` : ''}
            ${item.action_required ? `<p class="text-sm text-amber-700 bg-amber-50 rounded p-2 mb-1"><strong>조치:</strong> ${escapeHtml(item.action_required)}</p>` : ''}
            <div class="flex items-center gap-4 text-xs text-gray-400 mt-2">
                ${item.responsible_name ? `<span><i class="fas fa-user mr-1"></i>${escapeHtml(item.responsible_name)}</span>` : ''}
                ${item.due_date ? `<span class="${new Date(item.due_date) < new Date() && item.status !== 'completed' ? 'text-red-500 font-semibold' : ''}"><i class="fas fa-clock mr-1"></i>${formatDate(item.due_date)}</span>` : ''}
                ${item.milestone_name ? `<a href="/pages/work/schedule.html?highlight=${item.milestone_id}" class="text-purple-500 hover:text-purple-700"><i class="fas fa-calendar-alt mr-1"></i>공정표 보기</a>` : ''}
            </div>
        </div>
    `).join('');
}

/* ===== Save Meeting ===== */
async function saveMeeting() {
    const title = document.getElementById('meetingTitle').value.trim();
    const meetingDate = document.getElementById('meetingDate').value;
    if (!title || !meetingDate) { showToast('날짜와 제목은 필수입니다.', 'error'); return; }

    const data = {
        meeting_date: meetingDate,
        meeting_time: document.getElementById('meetingTime').value || null,
        title,
        location: document.getElementById('meetingLocation').value || null,
        summary: document.getElementById('meetingSummary').value || null,
        attendees: selectedAttendees.map(a => a.user_id)
    };

    try {
        if (meetingId) {
            await api(`/meetings/${meetingId}`, { method: 'PUT', body: JSON.stringify(data) });
            showToast('회의록이 저장되었습니다.');
        } else {
            const res = await api('/meetings', { method: 'POST', body: JSON.stringify(data) });
            meetingId = res.data.meeting_id;
            history.replaceState(null, '', `?id=${meetingId}`);
            showToast('회의록이 생성되었습니다.');
        }
        await loadMeeting();
    } catch (err) { showToast(err.message, 'error'); }
}

async function publishMeeting() {
    if (!confirm('회의록을 발행하시겠습니까? 발행 후 일반 사용자는 수정할 수 없습니다.')) return;
    try {
        await api(`/meetings/${meetingId}/publish`, { method: 'PUT' });
        showToast('회의록이 발행되었습니다.');
        await loadMeeting();
    } catch (err) { showToast(err.message, 'error'); }
}

async function unpublishMeeting() {
    if (!confirm('발행을 취소하시겠습니까?')) return;
    try {
        await api(`/meetings/${meetingId}/unpublish`, { method: 'PUT' });
        showToast('발행이 취소되었습니다.');
        await loadMeeting();
    } catch (err) { showToast(err.message, 'error'); }
}

async function deleteMeeting() {
    if (!confirm('회의록을 삭제하시겠습니까? 이 작업은 되돌릴 수 없습니다.')) return;
    try {
        await api(`/meetings/${meetingId}`, { method: 'DELETE' });
        showToast('회의록이 삭제되었습니다.');
        location.href = '/pages/work/meetings.html';
    } catch (err) { showToast(err.message, 'error'); }
}

/* ===== Agenda Item Modal ===== */
function openItemModal(editItemId) {
    const modal = document.getElementById('itemModal');
    const isEdit = !!editItemId;
    document.getElementById('itemModalTitle').textContent = isEdit ? '안건 수정' : '안건 추가';

    if (isEdit && meetingData) {
        const item = meetingData.items.find(i => i.item_id === editItemId);
        if (!item) return;
        document.getElementById('itemId').value = editItemId;
        document.getElementById('itemType').value = item.item_type;
        document.getElementById('itemProject').value = item.project_id || '';
        loadItemMilestones(item.milestone_id);
        document.getElementById('itemContent').value = item.content;
        document.getElementById('itemDecision').value = item.decision || '';
        document.getElementById('itemAction').value = item.action_required || '';
        document.getElementById('itemResponsible').value = item.responsible_user_id || '';
        document.getElementById('itemDueDate').value = item.due_date ? formatDate(item.due_date) : '';
        document.getElementById('itemStatus').value = item.status;
    } else {
        document.getElementById('itemId').value = '';
        document.getElementById('itemType').value = 'schedule_update';
        document.getElementById('itemProject').value = '';
        document.getElementById('itemMilestone').innerHTML = '<option value="">선택안함</option>';
        document.getElementById('itemContent').value = '';
        document.getElementById('itemDecision').value = '';
        document.getElementById('itemAction').value = '';
        document.getElementById('itemResponsible').value = '';
        document.getElementById('itemDueDate').value = '';
        document.getElementById('itemStatus').value = 'open';
    }

    modal.classList.remove('hidden');
}

function closeItemModal() { document.getElementById('itemModal').classList.add('hidden'); }

async function loadItemMilestones(selectedId) {
    const projectId = document.getElementById('itemProject').value;
    const sel = document.getElementById('itemMilestone');
    sel.innerHTML = '<option value="">선택안함</option>';
    if (!projectId) return;
    try {
        const res = await api(`/schedule/milestones?project_id=${projectId}`);
        (res.data || []).forEach(m => {
            const opt = document.createElement('option');
            opt.value = m.milestone_id;
            opt.textContent = `${m.milestone_name} (${formatDate(m.milestone_date)})`;
            if (selectedId && m.milestone_id === selectedId) opt.selected = true;
            sel.appendChild(opt);
        });
    } catch {}
}

async function saveItem() {
    const content = document.getElementById('itemContent').value.trim();
    if (!content) { showToast('안건 내용을 입력해주세요.', 'error'); return; }
    if (!meetingId) { showToast('회의록을 먼저 저장해주세요.', 'error'); return; }

    const itemId = document.getElementById('itemId').value;
    const data = {
        item_type: document.getElementById('itemType').value,
        project_id: document.getElementById('itemProject').value || null,
        milestone_id: document.getElementById('itemMilestone').value || null,
        content,
        decision: document.getElementById('itemDecision').value || null,
        action_required: document.getElementById('itemAction').value || null,
        responsible_user_id: document.getElementById('itemResponsible').value || null,
        due_date: document.getElementById('itemDueDate').value || null,
        status: document.getElementById('itemStatus').value
    };

    try {
        if (itemId) {
            await api(`/meetings/${meetingId}/items/${itemId}`, { method: 'PUT', body: JSON.stringify(data) });
            showToast('안건이 수정되었습니다.');
        } else {
            await api(`/meetings/${meetingId}/items`, { method: 'POST', body: JSON.stringify(data) });
            showToast('안건이 추가되었습니다.');
        }
        closeItemModal();
        await loadMeeting();
    } catch (err) { showToast(err.message, 'error'); }
}

async function deleteItem(itemId) {
    if (!confirm('안건을 삭제하시겠습니까?')) return;
    try {
        await api(`/meetings/${meetingId}/items/${itemId}`, { method: 'DELETE' });
        showToast('안건이 삭제되었습니다.');
        await loadMeeting();
    } catch (err) { showToast(err.message, 'error'); }
}

async function updateItemStatus(itemId, status) {
    if (!status) return;
    try {
        await api(`/meetings/items/${itemId}/status`, { method: 'PUT', body: JSON.stringify({ status }) });
        showToast('상태가 업데이트되었습니다.');
        await loadMeeting();
    } catch (err) { showToast(err.message, 'error'); }
}