let currentUser = null;
let agsCodes = [];
const MAX_ALERTS = 50;
const alerts = [];

initPage({ onAuth: (user) => { currentUser = user; } });

// ── AGS code list ────────────────────────────────────────────────────────────

function renderAgsList() {
    const container = document.getElementById('agsList');
    if (agsCodes.length === 0) {
        container.innerHTML = '<small class="text-body-secondary">Keine AGS-Codes konfiguriert.</small>';
        return;
    }
    container.innerHTML = agsCodes.map((code, idx) =>
        `<span class="badge bg-secondary me-1 mb-1">
            ${escapeHtml(code)}
            <button type="button" class="btn-close btn-close-white ms-1" style="font-size:.55rem;vertical-align:middle"
                    onclick="removeAgs(${idx})" aria-label="Entfernen"></button>
        </span>`
    ).join('');
}

function removeAgs(idx) {
    agsCodes.splice(idx, 1);
    renderAgsList();
}

document.getElementById('btnAddAgs').addEventListener('click', () => {
    const input = document.getElementById('agsInput');
    const code = input.value.trim().replace(/\D/g, '');
    if (!code) return;
    if (code.length < 5 || code.length > 12) {
        input.setCustomValidity('AGS-Code muss 5–12 Stellen haben.');
        input.reportValidity();
        return;
    }
    input.setCustomValidity('');
    if (!agsCodes.includes(code)) {
        agsCodes.push(code);
        renderAgsList();
    }
    input.value = '';
});

document.getElementById('agsInput').addEventListener('keydown', (e) => {
    if (e.key === 'Enter') {
        e.preventDefault();
        document.getElementById('btnAddAgs').click();
    }
});

// ── Load config ──────────────────────────────────────────────────────────────

async function loadConfig() {
    try {
        const resp = await fetch('/api/nina/config');
        if (!resp.ok) return;
        const cfg = await resp.json();
        applyConfig(cfg);
        updateStatusBadge(cfg);
    } catch (e) {
        console.error('NINA config load failed:', e);
    }
}

function applyConfig(cfg) {
    document.getElementById('ninaEnabled').checked = !!cfg.enabled;
    document.getElementById('pollInterval').value = cfg.poll_interval ?? 300;
    document.getElementById('ninaChannel').value = cfg.channel ?? 0;
    document.getElementById('minSeverity').value = cfg.min_severity ?? 'Severe';

    agsCodes = Array.isArray(cfg.ags_codes) ? [...cfg.ags_codes] : [];
    renderAgsList();

    const src = cfg.sources ?? {};
    document.getElementById('srcKatwarn').checked = src.katwarn !== false;
    document.getElementById('srcBiwapp').checked  = src.biwapp  !== false;
    document.getElementById('srcMowas').checked   = src.mowas   !== false;
    document.getElementById('srcDwd').checked     = src.dwd     !== false;
    document.getElementById('srcLhp').checked     = src.lhp     !== false;
    document.getElementById('srcPolice').checked  = !!src.police;
}

function updateStatusBadge(cfg) {
    const badge = document.getElementById('statusBadge');
    if (cfg.enabled) {
        const codes = Array.isArray(cfg.ags_codes) ? cfg.ags_codes.length : 0;
        badge.className = 'badge bg-success';
        badge.textContent = `Aktiv · ${codes} Region${codes !== 1 ? 'en' : ''}`;
    } else {
        badge.className = 'badge bg-secondary';
        badge.textContent = 'Deaktiviert';
    }
}

// ── Save config ──────────────────────────────────────────────────────────────

document.getElementById('btnSaveNina').addEventListener('click', async () => {
    const payload = {
        enabled: document.getElementById('ninaEnabled').checked,
        poll_interval: parseInt(document.getElementById('pollInterval').value) || 300,
        channel: parseInt(document.getElementById('ninaChannel').value) || 0,
        min_severity: document.getElementById('minSeverity').value,
        ags_codes: [...agsCodes],
        sources: {
            katwarn: document.getElementById('srcKatwarn').checked,
            biwapp:  document.getElementById('srcBiwapp').checked,
            mowas:   document.getElementById('srcMowas').checked,
            dwd:     document.getElementById('srcDwd').checked,
            lhp:     document.getElementById('srcLhp').checked,
            police:  document.getElementById('srcPolice').checked,
        },
    };

    const statusEl = document.getElementById('saveStatus');
    try {
        const resp = await fetch('/api/nina/config', {
            method: 'PUT',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload),
        });
        if (resp.ok) {
            const cfg = await resp.json();
            updateStatusBadge(cfg);
            statusEl.textContent = 'Gespeichert ✓';
            statusEl.className = 'align-self-center small text-success';
            statusEl.classList.remove('d-none');
            setTimeout(() => statusEl.classList.add('d-none'), 3000);
        } else {
            statusEl.textContent = 'Fehler beim Speichern';
            statusEl.className = 'align-self-center small text-danger';
            statusEl.classList.remove('d-none');
        }
    } catch (e) {
        console.error('Save failed:', e);
        statusEl.textContent = 'Netzwerkfehler';
        statusEl.className = 'align-self-center small text-danger';
        statusEl.classList.remove('d-none');
    }
});

// ── Alerts table ─────────────────────────────────────────────────────────────

const SEV_CLASS = {
    Extreme:  'danger',
    Severe:   'warning',
    Moderate: 'info',
    Minor:    'secondary',
};

const SEV_LABEL = {
    Extreme:  'EXTREM',
    Severe:   'Schwerwiegend',
    Moderate: 'Mäßig',
    Minor:    'Gering',
    Unknown:  'Unbekannt',
};

function renderAlerts() {
    const tbody = document.getElementById('alertsTable');
    if (alerts.length === 0) {
        tbody.innerHTML = '<tr><td colspan="4" class="text-center text-body-secondary py-3">Keine Meldungen empfangen.</td></tr>';
        return;
    }
    tbody.innerHTML = alerts.map(a => {
        const cls = a.msgType === 'Cancel' ? 'secondary' : (SEV_CLASS[a.severity] ?? 'secondary');
        const sevLabel = a.msgType === 'Cancel' ? 'Aufgehoben' : (SEV_LABEL[a.severity] ?? a.severity);
        const ts = a.sent ? new Date(a.sent).toLocaleString('de-DE', { dateStyle: 'short', timeStyle: 'short' }) : '–';
        return `<tr>
            <td><span class="badge bg-${cls} bg-opacity-85">${escapeHtml(sevLabel)}</span></td>
            <td>${escapeHtml(a.headline)}</td>
            <td><small class="text-body-secondary">${escapeHtml(a.id?.split('.')[0] ?? '–')}</small></td>
            <td><small class="text-body-secondary">${ts}</small></td>
        </tr>`;
    }).join('');
}

function addAlert(alert) {
    alerts.unshift(alert);
    if (alerts.length > MAX_ALERTS) alerts.pop();
    renderAlerts();
}

// ── WebSocket ─────────────────────────────────────────────────────────────────

function connectWebSocket() {
    const proto = location.protocol === 'https:' ? 'wss:' : 'ws:';
    const ws = new WebSocket(`${proto}//${location.host}/ws`);

    ws.onmessage = (event) => {
        const msg = JSON.parse(event.data);
        if (msg.type === 'nina_alert') {
            addAlert(msg.data);
        }
    };

    ws.onclose = () => { setTimeout(connectWebSocket, 3000); };
    ws.onerror = () => { ws.close(); };
}

// ── Init ──────────────────────────────────────────────────────────────────────

loadConfig();
connectWebSocket();