/**
 * m-common.js — TKQC 모바일 공통 JS
 * 바텀 네비게이션, 바텀시트 엔진, 인증, 뷰포트 가드, 토스트
 */

/* ===== Viewport Guard: 데스크탑이면 리다이렉트 ===== */
(function () {
    if (window.innerWidth > 768) {
        var page = location.pathname.replace('/m/', '').replace('.html', '');
        var map = { dashboard: '/issues-dashboard.html', inbox: '/issues-inbox.html', management: '/issues-management.html' };
        window.location.replace(map[page] || '/issues-dashboard.html');
    }
})();

/* ===== KST Date Utilities ===== */
// DB에 KST로 저장된 naive datetime을 그대로 표시 (이중 변환 방지)
function getKSTDate(date) {
    return new Date(date);
}
function formatKSTDate(date) {
    return new Date(date).toLocaleDateString('ko-KR', { timeZone: 'Asia/Seoul' });
}
function formatKSTTime(date) {
    return new Date(date).toLocaleTimeString('ko-KR', { timeZone: 'Asia/Seoul', hour: '2-digit', minute: '2-digit' });
}
function formatKSTDateTime(date) {
    return new Date(date).toLocaleString('ko-KR', { timeZone: 'Asia/Seoul', year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' });
}
function getKSTToday() {
    var kst = new Date(new Date().toLocaleString('en-US', { timeZone: 'Asia/Seoul' }));
    return new Date(kst.getFullYear(), kst.getMonth(), kst.getDate());
}
function getTimeAgo(date) {
    var now = new Date();
    var d = new Date(date);
    var diff = now - d;
    var mins = Math.floor(diff / 60000);
    var hours = Math.floor(diff / 3600000);
    var 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 formatKSTDate(date);
}

/* ===== Bottom Navigation ===== */
function renderBottomNav(activePage) {
    var nav = document.createElement('nav');
    nav.className = 'm-bottom-nav';
    var items = [
        { icon: 'fa-chart-line', label: '현황판', href: '/m/dashboard.html', page: 'dashboard' },
        { icon: 'fa-inbox', label: '수신함', href: '/m/inbox.html', page: 'inbox' },
        { icon: 'fa-tasks', label: '관리함', href: '/m/management.html', page: 'management' },
        { icon: 'fa-bullhorn', label: '신고', href: (location.hostname.includes('technicalkorea.net') ? 'https://tkreport.technicalkorea.net' : location.protocol + '//' + location.hostname + ':30180'), page: 'report', external: true, highlight: true }
    ];
    items.forEach(function (item) {
        var a = document.createElement('a');
        a.href = item.href;
        a.className = 'm-nav-item';
        if (item.page === activePage) a.classList.add('active');
        if (item.highlight) a.classList.add('highlight');
        if (item.external) { a.target = '_blank'; a.rel = 'noopener'; }
        a.innerHTML = '<i class="fas ' + item.icon + '"></i><span>' + item.label + '</span>';
        nav.appendChild(a);
    });
    document.body.appendChild(nav);
}

/* ===== Bottom Sheet Engine ===== */
var _activeSheets = [];

function openSheet(sheetId) {
    var overlay = document.getElementById(sheetId + 'Overlay');
    var sheet = document.getElementById(sheetId + 'Sheet');
    if (!overlay || !sheet) return;
    overlay.classList.add('open');
    sheet.classList.add('open');
    document.body.style.overflow = 'hidden';
    _activeSheets.push(sheetId);
}

function closeSheet(sheetId) {
    var overlay = document.getElementById(sheetId + 'Overlay');
    var sheet = document.getElementById(sheetId + 'Sheet');
    if (!overlay || !sheet) return;
    overlay.classList.remove('open');
    sheet.classList.remove('open');
    _activeSheets = _activeSheets.filter(function (id) { return id !== sheetId; });
    if (_activeSheets.length === 0) document.body.style.overflow = '';
}

function closeAllSheets() {
    _activeSheets.slice().forEach(function (id) { closeSheet(id); });
}

// ESC key closes topmost sheet
document.addEventListener('keydown', function (e) {
    if (e.key === 'Escape' && _activeSheets.length) {
        closeSheet(_activeSheets[_activeSheets.length - 1]);
    }
});

/* ===== Toast ===== */
var _toastTimer = null;
function showToast(message, type, duration) {
    type = type || 'info';
    duration = duration || 3000;
    var existing = document.querySelector('.m-toast');
    if (existing) existing.remove();
    clearTimeout(_toastTimer);

    var toast = document.createElement('div');
    toast.className = 'm-toast';
    if (type !== 'info') toast.classList.add(type);
    toast.textContent = message;
    document.body.appendChild(toast);
    requestAnimationFrame(function () { toast.classList.add('show'); });
    _toastTimer = setTimeout(function () {
        toast.classList.remove('show');
        setTimeout(function () { toast.remove(); }, 300);
    }, duration);
}

/* ===== Photo Modal ===== */
function openPhotoModal(src) {
    var modal = document.getElementById('photoModal');
    if (!modal) {
        modal = document.createElement('div');
        modal.id = 'photoModal';
        modal.className = 'm-photo-modal';
        modal.innerHTML = '<button class="m-photo-modal-close" onclick="closePhotoModal()"><i class="fas fa-times"></i></button><img>';
        modal.addEventListener('click', function (e) { if (e.target === modal) closePhotoModal(); });
        document.body.appendChild(modal);
    }
    modal.querySelector('img').src = src;
    modal.classList.add('open');
    document.body.style.overflow = 'hidden';
}

function closePhotoModal() {
    var modal = document.getElementById('photoModal');
    if (modal) {
        modal.classList.remove('open');
        if (!_activeSheets.length) document.body.style.overflow = '';
    }
}

/* ===== Auth Helper (authManager 위임 + 루프 방지) ===== */
var _mRedirectKey = '_sso_redirect_ts';
var _mRedirectCooldown = 5000; // 5초 내 재리다이렉트 방지

function _mSafeRedirectToLogin() {
    var last = parseInt(sessionStorage.getItem(_mRedirectKey) || '0', 10);
    if (Date.now() - last < _mRedirectCooldown) {
        console.warn('[TKQC-M] 리다이렉트 루프 감지 — 로그인 페이지로 이동하지 않음');
        return;
    }
    sessionStorage.setItem(_mRedirectKey, String(Date.now()));
    window.location.href = _getLoginUrl();
}

async function mCheckAuth() {
    // authManager가 있으면 위임 (SW 정리 + 캐시 관리 포함)
    if (window.authManager && typeof window.authManager.checkAuth === 'function') {
        var user = await window.authManager.checkAuth();
        if (user) {
            sessionStorage.removeItem(_mRedirectKey);
            return user;
        }
        _mSafeRedirectToLogin();
        return null;
    }
    // 폴백: authManager 없는 경우
    var token = TokenManager.getToken();
    if (!token) {
        _mSafeRedirectToLogin();
        return null;
    }
    try {
        var user = await AuthAPI.getCurrentUser();
        sessionStorage.removeItem(_mRedirectKey);
        return user;
    } catch (e) {
        TokenManager.removeToken();
        TokenManager.removeUser();
        _mSafeRedirectToLogin();
        return null;
    }
}

/* ===== Loading Overlay ===== */
function hideLoading() {
    var el = document.getElementById('loadingOverlay');
    if (el) { el.classList.add('hide'); setTimeout(function () { el.remove(); }, 300); }
}

/* ===== Helpers ===== */
function escapeHtml(text) {
    if (!text) return '';
    var div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

function getPhotoPaths(issue) {
    return [issue.photo_path, issue.photo_path2, issue.photo_path3, issue.photo_path4, issue.photo_path5].filter(Boolean);
}

function getCompletionPhotoPaths(issue) {
    return [issue.completion_photo_path, issue.completion_photo_path2, issue.completion_photo_path3, issue.completion_photo_path4, issue.completion_photo_path5].filter(Boolean);
}

function renderPhotoThumbs(photos) {
    if (!photos || !photos.length) return '';
    return '<div class="m-photo-row">' + photos.map(function (p, i) {
        return '<img src="' + p + '" class="m-photo-thumb" onclick="openPhotoModal(\'' + p + '\')" alt="사진 ' + (i + 1) + '">';
    }).join('') + '</div>';
}