document.addEventListener('DOMContentLoaded', function() {
    initTheme();
    initNotifications();
});

function initTheme() {
    const savedTheme = getCookie('theme') || 'light';
    document.documentElement.setAttribute('data-bs-theme', savedTheme);

    const toggle = document.getElementById('theme-toggle');
    if (toggle) {
        toggle.addEventListener('click', function(e) {
            e.preventDefault();
            const current = document.documentElement.getAttribute('data-bs-theme');
            const next = current === 'dark' ? 'light' : 'dark';
            document.documentElement.setAttribute('data-bs-theme', next);
            setCookie('theme', next, 365);
            const icon = this.querySelector('i');
            const text = this.querySelector('span');
            if (next === 'dark') {
                icon.className = 'bi bi-sun-fill me-2';
                text.textContent = 'Светлая тема';
            } else {
                icon.className = 'bi bi-moon-stars-fill me-2';
                text.textContent = 'Тёмная тема';
            }
        });
    }
}

function initNotifications() {
    loadNotifications();
    setInterval(loadNotificationCount, 30000);
}

function loadNotifications() {
    const notifList = document.getElementById('notif-list');
    if (!notifList) return;

    fetch('/api/notifications/latest')
        .then(r => r.json())
        .then(data => {
            if (data.length === 0) {
                notifList.innerHTML = '<div class="text-center py-3" style="color: var(--apple-gray-400); font-size: 13px;">Нет новых уведомлений</div>';
                return;
            }
            let html = '';
            data.forEach(n => {
                html += '<a href="' + n.link + '" class="dropdown-item border-bottom py-2" style="border-color: rgba(0,0,0,0.04) !important;">' +
                    '<div class="d-flex" style="gap: 8px;">' +
                    '<div>' + getNotifIcon(n.type) + '</div>' +
                    '<div>' +
                    '<div style="font-size: 13px;">' + n.message + '</div>' +
                    '<small style="color: var(--apple-gray-400);">' + getTimeAgo(n.time_ago) + '</small>' +
                    '</div></div></a>';
            });
            notifList.innerHTML = html;
        })
        .catch(() => {
            notifList.innerHTML = '<div class="text-center py-3" style="color: var(--apple-gray-400); font-size: 13px;">Ошибка загрузки</div>';
        });
}

function loadNotificationCount() {
    fetch('/api/notifications/count')
        .then(r => r.json())
        .then(data => {
            const badge = document.getElementById('notif-badge-top');
            if (data.count > 0) {
                if (badge) { badge.textContent = data.count; badge.style.display = ''; }
            } else {
                if (badge) badge.style.display = 'none';
            }
        })
        .catch(() => {});
}

function getNotifIcon(type) {
    const icons = {
        'success': '<i class="bi bi-check-circle-fill" style="color: var(--apple-green);"></i>',
        'danger': '<i class="bi bi-exclamation-circle-fill" style="color: var(--apple-red);"></i>',
        'warning': '<i class="bi bi-exclamation-triangle-fill" style="color: var(--apple-orange);"></i>',
        'info': '<i class="bi bi-info-circle-fill" style="color: var(--apple-blue);"></i>',
    };
    return icons[type] || icons.info;
}

function getTimeAgo(seconds) {
    if (!seconds) return 'только что';
    const mins = Math.floor(seconds / 60);
    if (mins < 1) return 'только что';
    if (mins < 60) return mins + ' мин. назад';
    const hours = Math.floor(mins / 60);
    if (hours < 24) return hours + ' ч. назад';
    const days = Math.floor(hours / 24);
    return days + ' дн. назад';
}

function getCookie(name) {
    const match = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
    return match ? decodeURIComponent(match[2]) : null;
}

function setCookie(name, value, days) {
    let expires = '';
    if (days) {
        const d = new Date();
        d.setTime(d.getTime() + days * 24 * 60 * 60 * 1000);
        expires = '; expires=' + d.toUTCString();
    }
    document.cookie = name + '=' + encodeURIComponent(value) + expires + '; path=/';
}