/* ============================================================
   map.js – WebGIS Pemetaan Kemiskinan & Masjid (SRS v1.0)
   ============================================================ */

window.appState = {
    mode: "view",
    activeType: "kemiskinan",
    layers: {},
    layerVisibility: {
        kemiskinan: true,
        masjid: true
    },
    isHeatmap: false,
    isRouting: false,
    routingWaypoints: []
};

/* ── Utility: escape HTML ── */
window.escapeHtml = function (value) {
    return String(value ?? "")
        .replace(/&/g, "&")
        .replace(/</g, "&lt;")
        .replace(/>/g, "&gt;")
        .replace(/"/g, "&quot;")
        .replace(/'/g, "&#039;");
};

/* ── Utility: SVG pin marker ── */
window.createPinIcon = function (bgColor, svgSymbol) {
    var svg = [
        '<svg xmlns="http://www.w3.org/2000/svg" width="32" height="42" viewBox="0 0 32 42">',
          '<defs>',
            '<filter id="shadow" x="-30%" y="-20%" width="160%" height="160%">',
              '<feDropShadow dx="0" dy="2" stdDeviation="2" flood-color="rgba(0,0,0,0.35)"/>',
            '</filter>',
          '</defs>',
          /* Pin body */
          '<path d="M16 2C9.37 2 4 7.37 4 14c0 9 12 26 12 26S28 23 28 14C28 7.37 22.63 2 16 2z"',
               'fill="' + bgColor + '" filter="url(#shadow)"/>',
          /* White inner circle */
          '<circle cx="16" cy="14" r="8" fill="rgba(255,255,255,0.25)"/>',
          /* Symbol */
          svgSymbol,
        '</svg>'
    ].join('');
    return L.divIcon({
        className: 'custom-pin-icon',
        html: svg,
        iconSize: [32, 42],
        iconAnchor: [16, 42],
        popupAnchor: [0, -44]
    });
};

/* Kemiskinan – merah (tidak terjangkau) */
window.redIcon = window.createPinIcon('#dc2626',
    '<text x="16" y="19" text-anchor="middle" font-size="11" fill="white" font-family="Arial">&#128106;</text>'
);
/* Kemiskinan – hijau (terjangkau) */
window.greenIcon = window.createPinIcon('#16a34a',
    '<text x="16" y="19" text-anchor="middle" font-size="11" fill="white" font-family="Arial">&#128106;</text>'
);
/* Masjid – biru */
window.blueIcon = window.createPinIcon('#1d4ed8',
    '<text x="16" y="19" text-anchor="middle" font-size="11" fill="white" font-family="Arial">&#128332;</text>'
);
/* Fallback orange (tidak digunakan, tapi tetap didefinisikan) */
window.orangeIcon = window.createPinIcon('#f97316',
    '<text x="16" y="19" text-anchor="middle" font-size="11" fill="white" font-family="Arial">&#128106;</text>'
);

/* ── Utility: POST form-encoded ── */
window.postForm = async function (url, payload) {
    var response = await fetch(url, {
        method: "POST",
        headers: { "Content-Type": "application/x-www-form-urlencoded" },
        body: new URLSearchParams(payload)
    });
    var text = (await response.text()).trim();
    if (!response.ok || text !== "success") {
        throw new Error(text || "Permintaan gagal.");
    }
};

/* ── Navbar hint ── */
window.updateMapHint = function () {
    var hint = document.getElementById("mapHint");
    if (!hint) { return; }

    if (appState.mode === "view") {
        hint.textContent = "Mode Lihat aktif — data keluarga prasejahtera & rumah ibadah ditampilkan. Klik kartu untuk navigasi peta.";
        return;
    }
    if (appState.activeType === "kemiskinan") {
        hint.textContent = "Mode Edit aktif — klik titik di peta untuk menambahkan data keluarga prasejahtera.";
        return;
    }
    hint.textContent = "Mode Edit aktif — klik titik di peta untuk menambahkan data rumah ibadah baru.";
};

/* ── Toolbar state ── */
window.updateToolbarState = function () {
    var states = {
        modeViewBtn:       appState.mode === "view",
        modeEditBtn:       appState.mode === "edit",
        typeKemiskinanBtn: appState.activeType === "kemiskinan",
        typeMasjidBtn:     appState.activeType === "masjid"
    };
    Object.keys(states).forEach(function (id) {
        var btn = document.getElementById(id);
        if (!btn) { return; }
        btn.classList.toggle("active", states[id]);
        /* Mode buttons get a different active colour */
        if (id === "modeEditBtn" && states[id]) {
            btn.classList.add("mode-active");
        } else {
            btn.classList.remove("mode-active");
        }
    });

    var viewBtn = document.getElementById("luminaModeView");
    var editBtn = document.getElementById("luminaModeEdit");
    if (viewBtn && editBtn) {
        viewBtn.style.opacity = appState.mode === "view" ? "1" : "0.5";
        viewBtn.style.boxShadow = appState.mode === "view" ? "0 4px 12px rgba(99,102,241,0.25)" : "none";
        
        editBtn.style.opacity = appState.mode === "edit" ? "1" : "0.5";
        editBtn.style.boxShadow = appState.mode === "edit" ? "0 4px 12px rgba(20,184,166,0.25)" : "none";
    }
};

window.setActiveMenu = function(element) {
    var items = document.querySelectorAll('.lumina-menu-item');
    items.forEach(function(item) {
        item.classList.remove('active');
    });
    element.classList.add('active');
};

/* ── Layer visibility ── */
window.setLayerVisibility = function (key, isVisible) {
    appState.layerVisibility[key] = !!isVisible;
    var layer = appState.layers[key];
    if (!layer || !window.map) { return; }
    if (isVisible) {
        if (!map.hasLayer(layer)) { map.addLayer(layer); }
    } else {
        if (map.hasLayer(layer)) { map.removeLayer(layer); }
    }
};

/* ── Mode & type switches ── */
window.setMode = function (mode) {
    appState.mode = mode;
    window.updateToolbarState();
    window.updateMapHint();
    
    var mapEl = document.getElementById("map");
    if (mapEl) {
        if (mode === "edit") {
            mapEl.classList.add("edit-mode");
        } else {
            mapEl.classList.remove("edit-mode");
        }
    }

    if (typeof window.loadAllData === "function") {
        window.loadAllData();
    }
};

window.setDataType = function (type) {
    appState.activeType = type;
    window.updateToolbarState();
    window.updateMapHint();
    if (typeof window.filterSidebar === 'function') {
        window.filterSidebar(type);
    }
};

window.filterSidebar = function(type) {
    var secKem = document.getElementById('sec-kemiskinan');
    var secMsj = document.getElementById('sec-masjid');
    
    if (secKem) secKem.style.display = (type === 'semua' || type === 'kemiskinan') ? 'block' : 'none';
    if (secMsj) secMsj.style.display = (type === 'semua' || type === 'masjid') ? 'block' : 'none';

    var btnSemua = document.getElementById('filter-btn-semua');
    var btnKem = document.getElementById('filter-btn-kemiskinan');
    var btnMsj = document.getElementById('filter-btn-masjid');
    
    if (btnSemua) btnSemua.classList.toggle('active', type === 'semua');
    if (btnKem) btnKem.classList.toggle('active', type === 'kemiskinan');
    if (btnMsj) btnMsj.classList.toggle('active', type === 'masjid');

    var sidebarSub = document.getElementById('sidebar-sub');
    if (sidebarSub) {
        if (type === 'semua') sidebarSub.textContent = 'Menampilkan semua data';
        else if (type === 'kemiskinan') sidebarSub.textContent = 'Menampilkan list Data Keluarga';
        else sidebarSub.textContent = 'Menampilkan list Rumah Ibadah';
    }
    
    var sidebar = document.getElementById('sidebar');
    if (sidebar && sidebar.style.display === 'none') {
        sidebar.style.display = 'flex';
        var pes = document.getElementById('panel-pesan');
        if (pes) pes.style.display = 'none';
        var lap = document.getElementById('panel-laporan');
        if (lap) lap.style.display = 'none';
    }
};

/* ── Format helpers ── */
window.formatMeters = function (value) {
    return Number(value).toLocaleString("id-ID", { maximumFractionDigits: 0 }) + " m";
};

window.isValidCoordinate = function (lat, lng) {
    return Number.isFinite(Number(lat)) && Number.isFinite(Number(lng));
};

window.isValidRadius = function (radius) {
    var r = Number(radius);
    return Number.isFinite(r) && r >= 100 && r <= 5000;
};

/* ─────────────────────────────────────────────
   DOMContentLoaded – inisialisasi peta (KF-01)
   ───────────────────────────────────────────── */
document.addEventListener("DOMContentLoaded", function () {

    /* Inisialisasi peta terpusat di Pontianak */
    window.map = L.map("map").setView([-0.0263, 109.3425], 13);

    // --- Base maps ---
    window.osmBase = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
        attribution: '&copy; OpenStreetMap contributors'
    });
    window.darkBase = L.tileLayer('https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png', {
        attribution: '&copy; OpenStreetMap contributors &copy; CARTO'
    });
    
    // Add default basemap
    window.osmBase.addTo(map);

    /* ── Layers ── */
    appState.layers.kemiskinan = L.layerGroup().addTo(map);
    appState.layers.masjid     = L.layerGroup().addTo(map);
    appState.layers.heatmap    = L.layerGroup(); // Do not add yet

    /* Klik peta – hanya aktif di Mode Edit (KF-03, KF-07) */
    map.on("click", function (event) {
        if (appState.mode !== "edit") { return; }

        var lat = event.latlng.lat;
        var lng = event.latlng.lng;

        if (appState.activeType === "kemiskinan") {
            if (typeof window.openKemiskinanModal === "function") {
                window.openKemiskinanModal(lat, lng);
            }
            return;
        }

        if (appState.activeType === "masjid") {
            if (typeof window.openMasjidModal === "function") {
                window.openMasjidModal(lat, lng);
            }
        }
    });

    /* Init state awal */
    window.setMode("view");
    window.setDataType("kemiskinan");

    setTimeout(function () { map.invalidateSize(); }, 300);

    /* Cek session login, lalu load data */
    if (typeof window.checkAuthState === "function") {
        window.checkAuthState().then(function () {
            if (typeof window.loadAllData === "function") { window.loadAllData(); }
        });
    } else if (typeof window.loadAllData === "function") {
        window.loadAllData();
    }
});

/* ── Heatmap & Routing Features ── */
window.toggleHeatmap = function(btnEl) {
    if(!window.appState) return;
    window.appState.isHeatmap = !window.appState.isHeatmap;
    btnEl.classList.toggle('active', window.appState.isHeatmap);
    
    if(window.appState.isHeatmap) {
        document.getElementById('desc-heatmap').style.display = 'block';
        // Hide kemiskinan markers
        window.appState.layers.kemiskinan.eachLayer(function(l) { l.setOpacity(0); });
        // Show heatmap
        if(!window.map.hasLayer(window.appState.layers.heatmap)) {
            window.appState.layers.heatmap.addTo(window.map);
        }
        // Switch to Dark mode for better visual
        window.map.removeLayer(window.osmBase);
        window.darkBase.addTo(window.map);
    } else {
        document.getElementById('desc-heatmap').style.display = 'none';
        // Show kemiskinan markers
        window.appState.layers.kemiskinan.eachLayer(function(l) { l.setOpacity(1); });
        // Hide heatmap
        if(window.map.hasLayer(window.appState.layers.heatmap)) {
            window.map.removeLayer(window.appState.layers.heatmap);
        }
        // Restore map base
        window.map.removeLayer(window.darkBase);
        window.osmBase.addTo(window.map);
    }
};

window.toggleRoutingMode = function(btnEl) {
    if(!window.appState) return;
    window.appState.isRouting = true;
    window.appState.routingWaypoints = [];
    btnEl.classList.add('active');
    document.getElementById('desc-routing').style.display = 'block';
    
    // Show instruction panel
    document.getElementById('routing-instruction-panel').style.display = 'block';
    document.getElementById('routing-instruction-text').innerHTML = 'Silakan klik <b>Masjid</b> atau <b>Rumah Warga</b> di peta sebagai titik awal rute.';
};

window.cancelRouting = function() {
    if(!window.appState) return;
    window.appState.isRouting = false;
    window.appState.routingWaypoints = [];
    document.getElementById('btn-toggle-routing').classList.remove('active');
    document.getElementById('desc-routing').style.display = 'none';
    document.getElementById('routing-instruction-panel').style.display = 'none';
    
    // Remove routing control if exists
    if(window.routingControl) {
        window.map.removeControl(window.routingControl);
        window.routingControl = null;
    }
};

window.handleRoutingClick = function(lat, lng, name) {
    window.appState.routingWaypoints.push(L.latLng(lat, lng));
    var pts = window.appState.routingWaypoints;
    var inst = document.getElementById('routing-instruction-text');
    
    if(pts.length === 1) {
        inst.innerHTML = '<div style="margin-bottom:6px; color:#16a34a;"><i class="fa-solid fa-check"></i> Titik Awal: <b>' + window.escapeHtml(name) + '</b></div>' +
                         '<div style="margin-bottom:6px;"><b>Langkah 2:</b> Pilih Tujuan</div>' +
                         '<span style="color:var(--lumina-text-muted);">Klik rumah/masjid lain di peta sebagai tujuan akhir.</span>';
    } else if(pts.length === 2) {
        inst.innerHTML = '<div style="margin-bottom:6px; color:#16a34a;"><i class="fa-solid fa-check"></i> Rute Berhasil Dibuat</div>' +
                         '<span style="color:var(--lumina-text-muted);">Detail arah jalan (navigasi) muncul di layar sebelah kanan peta.</span>';
        
        // Remove existing control
        if(window.routingControl) {
            window.map.removeControl(window.routingControl);
        }
        
        window.routingControl = L.Routing.control({
            waypoints: pts,
            routeWhileDragging: false,
            addWaypoints: false,
            show: true,
            lineOptions: {
                styles: [{color: '#2563eb', opacity: 0.8, weight: 6}]
            }
        }).addTo(window.map);
        
        window.appState.isRouting = false; // Turn off click interception after 2 points
        document.getElementById('btn-toggle-routing').classList.remove('active');
    }
};