/**
 * MAPS FORM CUSTOM - MAPLIBRE VERSION
 * Menggunakan Style Google Maps (Raster)
 */

var map, marker;
var currentStyle = 'hybrid'; // Default style

// --- DEFINISI STYLE GOOGLE MAPS ---
const googleHybridStyle = {
    'version': 8,
    'sources': {
        'google-hybrid': {
            'type': 'raster',
            'tiles': ['https://mt1.google.com/vt/lyrs=y&x={x}&y={y}&z={z}'],
            'tileSize': 256,
            'attribution': '© Google Maps'
        }
    },
    'layers': [{
        'id': 'google-hybrid-layer',
        'type': 'raster',
        'source': 'google-hybrid',
        'minzoom': 0,
        'maxzoom': 22
    }]
};

const googleStreetStyle = {
    'version': 8,
    'sources': {
        'google-street': {
            'type': 'raster',
            'tiles': ['https://mt1.google.com/vt/lyrs=m&x={x}&y={y}&z={z}'],
            'tileSize': 256,
            'attribution': '© Google Maps'
        }
    },
    'layers': [{
        'id': 'google-street-layer',
        'type': 'raster',
        'source': 'google-street',
        'minzoom': 0,
        'maxzoom': 22
    }]
};

function initMap() {
    var latitudeInput = document.getElementById('latitude').value;
    var longitudeInput = document.getElementById('longitude').value;

    // Cek input awal
    if (latitudeInput && longitudeInput) {
        var pos = {
            lat: parseFloat(latitudeInput),
            lng: parseFloat(longitudeInput)
        };
        initMapWithPos(pos);
    } else {
        // Coba Geolocation
        if (navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(function(position) {
                var pos = {
                    lat: position.coords.latitude,
                    lng: position.coords.longitude
                };
                initMapWithPos(pos);
                updateFormInputs(pos.lat, pos.lng);
            }, function() {
                console.warn("⚠️ Geolocation gagal, fallback ke Jakarta");
                handleLocationError(true);
                initMapWithPos({ lat: -6.2, lng: 106.816666 });
            });
        } else {
            console.warn("⚠️ Browser tidak support geolocation, fallback ke Jakarta");
            handleLocationError(false);
            initMapWithPos({ lat: -6.2, lng: 106.816666 });
        }
    }
}

function initMapWithPos(pos) {
    // Init MapLibre
    map = new maplibregl.Map({
        container: 'map',
        style: googleHybridStyle, // Default Hybrid
        center: [pos.lng, pos.lat], // INGAT: MapLibre urutannya [Lng, Lat]
        zoom: 10,
        attributionControl: true,
        dragRotate: false,
        pitchWithRotate: false,
        touchPitch: false
    });

    // Kontrol Navigasi (Zoom & Compass)
    map.addControl(new maplibregl.NavigationControl({ showCompass: false, showZoom: true }), 'top-right');
    map.addControl(new maplibregl.FullscreenControl(), 'top-left');

    // Kontrol Lokasi Saya (Geolocate)
    const geolocateControl = new maplibregl.GeolocateControl({
        positionOptions: { enableHighAccuracy: true },
        trackUserLocation: true,
        showUserHeading: true
    });
    map.addControl(geolocateControl, 'top-left');

    // Event saat lokasi ditemukan via tombol
    geolocateControl.on('geolocate', function(e) {
        var lat = e.coords.latitude;
        var lng = e.coords.longitude;
        updateMarker(lat, lng);
        updateFormInputs(lat, lng);
    });

    // Tambahkan Tombol Ganti Layer (Satelit/Jalan)
    addLayerSwitcher();

    // Tunggu map load sebelum pasang marker awal
    map.on('load', function() {
        updateMarker(pos.lat, pos.lng);
    });

    // Klik peta → pindah marker
    map.on('click', function(e) {
        // e.lngLat berisi {lng, lat}
        var latitude = e.lngLat.lat.toFixed(6);
        var longitude = e.lngLat.lng.toFixed(6);
        updateMarker(latitude, longitude);
        updateFormInputs(latitude, longitude);
    });
}

// Fungsi Custom Switch Layer
function addLayerSwitcher() {
    class LayerSwitchControl {
        onAdd(map) {
            this._map = map;
            this._container = document.createElement('div');
            this._container.className = 'maplibregl-ctrl maplibregl-ctrl-group';
            
            const btn = document.createElement('button');
            btn.innerHTML = '🗺️';
            btn.title = "Ganti Tampilan Peta";
            btn.type = "button";
            btn.onclick = () => {
                if (currentStyle === 'hybrid') {
                    map.setStyle(googleStreetStyle);
                    currentStyle = 'street';
                } else {
                    map.setStyle(googleHybridStyle);
                    currentStyle = 'hybrid';
                }
            };
            this._container.appendChild(btn);
            return this._container;
        }
        onRemove() {
            this._container.parentNode.removeChild(this._container);
            this._map = undefined;
        }
    }
    map.addControl(new LayerSwitchControl(), 'top-right');
}

function updateMarker(latitude, longitude) {
    // MapLibre Marker menggunakan DOM Element, bukan icon image object
    if (marker) {
        marker.setLngLat([longitude, latitude]); // [Lng, Lat]
        
        // Update popup
        const popup = marker.getPopup();
        if(popup) popup.setHTML("Lokasi terpilih");
        else marker.setPopup(new maplibregl.Popup().setHTML("Lokasi terpilih")).togglePopup();
        
    } else {
        // Buat marker baru warna merah default
        marker = new maplibregl.Marker({ color: '#D9534F' }) 
            .setLngLat([longitude, latitude])
            .setPopup(new maplibregl.Popup().setHTML("Lokasi terpilih"))
            .addTo(map);
        marker.togglePopup();
    }
    
    // Animasi terbang ke lokasi baru
    map.flyTo({ center: [longitude, latitude], zoom: 17 });
}

function updateFormInputs(latitude, longitude) {
    document.getElementById('latitude').value = latitude;
    document.getElementById('longitude').value = longitude;
    document.getElementById('latlong').value = `${latitude}, ${longitude}`;
}

function handleLocationError(browserHasGeolocation) {
    console.error(browserHasGeolocation ? 
        '❌ Error: Geolocation service failed.' :
        '❌ Error: Browser tidak support geolocation.');
}

// Sinkronisasi input form ⇄ peta
document.addEventListener('DOMContentLoaded', function() {
    initMap();
    const latlongInput = document.getElementById('latlong');
    const latitudeInput = document.querySelector('input[data-maps="latitude"]') || document.getElementById('latitude');
    const longitudeInput = document.querySelector('input[data-maps="longitude"]') || document.getElementById('longitude');

    // Set nilai awal jika ada
    if (latitudeInput.value && longitudeInput.value) {
        latlongInput.value = `${latitudeInput.value}, ${longitudeInput.value}`;
    }

    // Listener Input Manual LatLong (Format: lat, long)
    latlongInput.addEventListener('input', function() {
        const latlongValue = latlongInput.value.split(',');
        const latLongRegex = /^(-?\d+(\.\d+)?),\s*(-?\d+(\.\d+)?)$/;
        
        if (latLongRegex.test(latlongInput.value.trim())) {
            if (latlongValue.length === 2) {
                const lat = parseFloat(latlongValue[0].trim());
                const long = parseFloat(latlongValue[1].trim());
                latitudeInput.value = lat;
                longitudeInput.value = long;
                updateMarker(lat, long);
            }
        }
    });

    latitudeInput.addEventListener('input', function() {
        latlongInput.value = `${latitudeInput.value}, ${longitudeInput.value}`;
    });
    longitudeInput.addEventListener('input', function() {
        latlongInput.value = `${latitudeInput.value}, ${longitudeInput.value}`;
    });
});