window.SpotNotes = window.SpotNotes || {};

window.SpotNotes.initMap = function() {
    // Default view (e.g., Oklahoma area if geolocation fails)
    window.SpotNotes.map = L.map('map').setView([35.6528, -97.4781], 10);

    // Ask for location
    if (navigator.geolocation) {
        navigator.geolocation.watchPosition((position) => {
            const { latitude, longitude } = position.coords;
            window.SpotNotes.userLocation = { lat: latitude, lng: longitude };
            
            const centerBtn = document.getElementById('btn-center-user');
            if (centerBtn) centerBtn.style.display = 'block';

            if (window.SpotNotes.isTracking) {
                window.SpotNotes.map.setView([latitude, longitude]);
            } else if (!window.SpotNotes.userMarker && !new URLSearchParams(window.location.search).has('pad') && !new URLSearchParams(window.location.search).has('note')) {
                window.SpotNotes.map.setView([latitude, longitude], 13);
                console.log("Map centered on user location:", latitude, longitude);
            }
            
            // Add User Location Dot
            if (window.SpotNotes.userMarker) {
                window.SpotNotes.userMarker.setLatLng([latitude, longitude]);
            } else {
                window.SpotNotes.userMarker = L.circleMarker([latitude, longitude], {
                    radius: 8,
                    fillColor: "#3388ff",
                    color: "#fff",
                    weight: 2,
                    opacity: 1,
                    fillOpacity: 0.8
                }).addTo(window.SpotNotes.map).bindPopup("You are here");
            }

            // Location-Based Browser Alerts
            const userLatLng = L.latLng(latitude, longitude);
            if (window.SpotNotes.activeNotes && window.SpotNotes.activeNotes.length > 0) {
                window.SpotNotes.activeNotes.forEach(note => {
                    const noteLatLng = L.latLng(note.lat, note.lng);
                    if (userLatLng.distanceTo(noteLatLng) <= 50) {
                        if (!window.SpotNotes.notifiedNoteIds.has(note.id)) {
                            window.SpotNotes.notifiedNoteIds.add(note.id);
                            alert(`You are near a note!\n\n${note.title}\n${note.content}`);
                        }
                    }
                });
            }
        }, (err) => {
            console.warn("Geolocation error:", err);
        }, {
            enableHighAccuracy: true,
            timeout: 10000,
            maximumAge: 0
        });
    }

    // Add OpenStreetMap tiles
    L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
        maxZoom: 19,
        attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
    }).addTo(window.SpotNotes.map);

    // Listen for zoom changes to toggle note display
    window.SpotNotes.map.on('zoomend', () => {
        if (window.SpotNotes.activeNotes.length > 0) {
            window.SpotNotes.renderMapMarkers();
        }
    });

    window.SpotNotes.map.on('dragstart', window.SpotNotes.stopTracking);
    window.SpotNotes.map.on('popupopen', window.SpotNotes.stopTracking);

    // Initialize MarkerClusterGroup
    window.SpotNotes.markerClusterGroup = L.markerClusterGroup({
        disableClusteringAtZoom: 16
    });
    window.SpotNotes.map.addLayer(window.SpotNotes.markerClusterGroup);
};

window.SpotNotes.renderMapMarkers = function() {
    // Clear existing
    if (window.SpotNotes.markerClusterGroup) {
        window.SpotNotes.markerClusterGroup.clearLayers();
    }
    
    // Also remove from map directly just in case (fallback)
    window.SpotNotes.currentMarkers.forEach(marker => window.SpotNotes.map.removeLayer(marker));
    window.SpotNotes.currentMarkers = [];

    const zoom = window.SpotNotes.map.getZoom();
    const showFull = zoom >= 14; // Zoom threshold

    window.SpotNotes.activeNotes.forEach(note => {
        if (!note || note.lat === undefined || note.lng === undefined || (note.lat === 0 && note.lng === 0)) {
            return;
        }

        let marker;
        let actionBtns = '';
        
        // Determine permissions
        const isOwner = window.SpotNotes.currentUser && (note.owner_id ? note.owner_id === window.SpotNotes.currentUser.id : window.SpotNotes.activePadOwnerId === window.SpotNotes.currentUser.id);
        const isPublic = note.is_public !== undefined ? note.is_public : window.SpotNotes.activePadIsPublic;
        const canWrite = (note.notepad && note.notepad.can_write !== undefined) ? note.notepad.can_write : window.SpotNotes.activePadCanWrite;

        if (canWrite) {
            const escapedTitle = window.SpotNotes.escapeHtml(note.title).replace(/'/g, "\\'").replace(/"/g, '&quot;');
            const escapedContent = window.SpotNotes.escapeHtml(note.content).replace(/'/g, "\\'").replace(/"/g, '&quot;').replace(/\n/g, '\\n');
            actionBtns = `<br><button onclick="openEditNoteModal(${note.id}, '${escapedTitle}', '${escapedContent}')" class="btn-note-edit">✏️ Edit</button><button onclick="window.SpotNotes.deleteNote(${note.id})" class="btn-note-delete">Delete</button>`;
        } else if (isPublic) {
            actionBtns = `<br><button onclick="window.SpotNotes.reportNote(${note.id})" class="btn-note-report">Report</button>`;
        }

        const shareToken = note.share_token || '';
        const shareBtn = `<button onclick="window.SpotNotes.shareNote(${note.id}, '${shareToken}')" class="btn-note-share">🔗 Share</button>`;
        const dateStr = new Date(note.created_at).toLocaleString();
        const padColor = (note.notepad && note.notepad.color) ? note.notepad.color : '#3388ff';
        const lockPrefix = note.is_encrypted ? '🔒 ' : '';

        const directionsBtn = `<a href="https://www.google.com/maps/dir/?api=1&destination=${note.lat},${note.lng}" target="_blank" class="btn-note-directions" style="display:inline-block; margin-top:5px; margin-right:5px; font-size:0.8rem; text-decoration:none;">🗺️ Directions</a>`;

        if (showFull) {
            const icon = L.divIcon({
                className: '',
                html: `<div class="map-note-card">
                        <div class="popup-note-header" style="background-color: ${padColor}; color: white; padding: 6px 10px; font-weight: bold; border-radius: 4px 4px 0 0; text-shadow: 0 1px 2px rgba(0,0,0,0.15); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;">
                            ${lockPrefix}${window.SpotNotes.escapeHtml(note.title)}
                        </div>
                        <div style="padding: 10px; background: white; border-radius: 0 0 4px 4px; border: 1px solid #ddd; border-top: none;">
                            <div style="white-space: pre-wrap; margin-bottom: 6px;">${window.SpotNotes.escapeHtml(note.content)}</div>
                            <div style="font-size:0.7rem; color:#888; margin-top:4px;">${dateStr}</div>
                            <div style="margin-top: 6px;">${directionsBtn} ${shareBtn} ${actionBtns}</div>
                        </div>
                       </div>`,
                iconSize: [200, 'auto'],
                iconAnchor: [100, 0]
            });
            marker = L.marker([note.lat, note.lng], { icon: icon });
        } else {
            const teardropSvg = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 36" width="24" height="36"><path fill="${padColor}" d="M12 0C5.373 0 0 5.373 0 12c0 8.442 12 24 12 24s12-15.558 12-24c0-6.627-5.373-12-12-12zm0 17c-2.761 0-5-2.239-5-5s2.239-5 5-5 5 2.239 5 5-2.239 5-5 5z" stroke="white" stroke-width="1.5"/></svg>`;
            
            const svgIcon = L.divIcon({
                className: 'custom-div-icon',
                html: teardropSvg,
                iconSize: [24, 36],
                iconAnchor: [12, 36],
                popupAnchor: [0, -36]
            });
            marker = L.marker([note.lat, note.lng], { icon: svgIcon });
            
            const popupHtml = `
            <div class="popup-note-card">
                <div class="popup-note-header" style="background-color: ${padColor}; color: white; padding: 8px 12px; font-weight: bold; text-shadow: 0 1px 2px rgba(0,0,0,0.15); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;">
                    ${window.SpotNotes.escapeHtml(note.title)}
                </div>
                <div class="popup-note-body">
                    <div style="white-space: pre-wrap; margin-bottom: 6px;">${window.SpotNotes.escapeHtml(note.content)}</div>
                    <div style="font-size:0.7rem; color:#888; margin-bottom: 6px;">${dateStr}</div>
                    <div style="margin-top: 6px;">${directionsBtn} ${shareBtn} ${actionBtns}</div>
                </div>
            </div>
            `;
            marker.bindPopup(popupHtml, { padding: [0, 0] });
        }
        
        const bumpZIndex = function() {
            this.setZIndexOffset(window.SpotNotes.topZIndex++);
        };
        marker.on('click', bumpZIndex);
        marker.on('mousedown', bumpZIndex);

        if (window.SpotNotes.markerClusterGroup) {
            window.SpotNotes.markerClusterGroup.addLayer(marker);
        } else {
            marker.addTo(window.SpotNotes.map);
        }

        window.SpotNotes.currentMarkers.push(marker);
    });
};

window.SpotNotes.stopTracking = function() {
    window.SpotNotes.isTracking = false;
    window.SpotNotes.updateTrackingUI();
};

window.SpotNotes.updateTrackingUI = function() {
    const btn = document.getElementById('btn-center-user');
    if (btn) {
        if (window.SpotNotes.isTracking) {
            btn.textContent = "Tracking Location...";
            btn.style.backgroundColor = "#28a745";
        } else {
            btn.textContent = "Target My Location";
            btn.style.backgroundColor = "";
        }
    }
};