/* ============================================================
   draw_sosial_public.js — Dashboard Publik (READ ONLY)
   v3.0 — Heatmap, Masjid Penanggung, Stats, Blind Spot
   Tanpa fitur CRUD (tambah/edit/hapus)
   ============================================================ */

/* ── MAP INIT ── */
var map = L.map('map', { zoomControl: false }).setView([-0.0263, 109.3425], 13);
L.control.zoom({ position: 'bottomright' }).addTo(map);
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '© OpenStreetMap contributors', maxZoom: 19
}).addTo(map);

/* ── LAYER GROUPS ── */
var layerGroupMasjid   = L.featureGroup().addTo(map);
var layerGroupPenduduk = L.featureGroup().addTo(map);
var heatmapLayer       = null;
var showMasjid         = true;
var showPenduduk       = true;
var showHeatmap        = false;

/* ── DATA STORAGE ── */
var masjidData   = [];
var pendudukData = [];
var blindSpotIds = [];

/* ── CONSTANTS ── */
const JENIS_BANTUAN_OPTS = [
    { value: 'BLT / Modal Usaha',    icon: '💰' },
    { value: 'Bedah Rumah',          icon: '🏠' },
    { value: 'Air Bersih / PDAM',    icon: '💧' },
    { value: 'Sembako',              icon: '🍚' },
    { value: 'Beasiswa Pendidikan',  icon: '📚' },
];
function getJenisIcon(jenis) {
    const found = JENIS_BANTUAN_OPTS.find(o => o.value === jenis);
    return found ? found.icon : '🤝';
}

/* ============================================================
   TOGGLE LAYERS
   ============================================================ */
function toggleLayer(type) {
    if (type === 'masjid') {
        showMasjid = !showMasjid;
        showMasjid ? map.addLayer(layerGroupMasjid) : map.removeLayer(layerGroupMasjid);
        document.getElementById('btnMasjid').classList.toggle('active', showMasjid);
    } else if (type === 'penduduk') {
        showPenduduk = !showPenduduk;
        showPenduduk ? map.addLayer(layerGroupPenduduk) : map.removeLayer(layerGroupPenduduk);
        document.getElementById('btnPenduduk').classList.toggle('active', showPenduduk);
        if (!showPenduduk && showHeatmap) toggleHeatmap();
    } else if (type === 'heatmap') {
        toggleHeatmap();
    }
}

function toggleHeatmap() {
    showHeatmap = !showHeatmap;
    var btn = document.getElementById('btnHeatmap');
    if (showHeatmap) {
        map.removeLayer(layerGroupPenduduk);
        showPenduduk = false;
        document.getElementById('btnPenduduk').classList.remove('active');
        if (heatmapLayer) map.addLayer(heatmapLayer);
        if (btn) btn.classList.add('active');
    } else {
        if (heatmapLayer) map.removeLayer(heatmapLayer);
        map.addLayer(layerGroupPenduduk);
        showPenduduk = true;
        document.getElementById('btnPenduduk').classList.add('active');
        if (btn) btn.classList.remove('active');
    }
}

/* ============================================================
   HELPERS
   ============================================================ */
function fmtNum(n, dec=2) {
    return parseFloat(n).toLocaleString('id-ID', { maximumFractionDigits: dec });
}
function getSkorLabel(skor) {
    if (skor >= 70) return { label: 'Sangat Rentan', color: '#ef4444', emoji: '🔴' };
    if (skor >= 40) return { label: 'Rentan',        color: '#f97316', emoji: '🟠' };
    return               { label: 'Cukup',           color: '#eab308', emoji: '🟡' };
}
function findMasjidPenanggung(pLat, pLng) {
    var nearest = null, minDist = Infinity;
    masjidData.forEach(m => {
        var d = map.distance([pLat, pLng], [m.lat, m.lng]);
        if (d <= m.radius && d < minDist) { minDist = d; nearest = m; }
    });
    return nearest;
}

/* ── Icons ── */
function makeMasjidIcon() {
    return L.divIcon({ html:`<svg xmlns="http://www.w3.org/2000/svg" width="30" height="42" viewBox="0 0 30 42"><path d="M15 0C6.7 0 0 6.7 0 15c0 11.25 15 27 15 27S30 26.25 30 15C30 6.7 23.3 0 15 0z" fill="#f59e0b" stroke="rgba(255,255,255,.3)" stroke-width="1.5"/><text x="15" y="20" text-anchor="middle" font-size="13" fill="white">🕌</text></svg>`, iconSize:[30,42], iconAnchor:[15,42], popupAnchor:[0,-44], className:'' });
}
function makePendudukIcon(inRadius, isBlindspot=false) {
    var c = isBlindspot ? '#ef4444' : (inRadius ? '#f59e0b' : '#e879f9');
    return L.divIcon({ html:`<svg xmlns="http://www.w3.org/2000/svg" width="22" height="32" viewBox="0 0 22 32"><path d="M11 0C4.9 0 0 4.9 0 11c0 8.25 11 21 11 21S22 19.25 22 11C22 4.9 17.1 0 11 0z" fill="${c}" stroke="rgba(255,255,255,.3)" stroke-width="1.5"/><circle cx="11" cy="11" r="4" fill="rgba(0,0,0,.35)"/><circle cx="11" cy="11" r="2.5" fill="white"/></svg>`, iconSize:[22,32], iconAnchor:[11,32], popupAnchor:[0,-34], className: isBlindspot ? 'blindspot-marker' : '' });
}

/* ============================================================
   POPUP BUILDERS — READ ONLY
   ============================================================ */

/* ── POPUP MASJID ── */
function buildMasjidPopup(d) {
    var penerima = pendudukData
        .map(p => ({ ...p, dist: map.distance([p.lat, p.lng], [d.lat, d.lng]) }))
        .filter(p => p.dist <= d.radius)
        .sort((a, b) => b.skor - a.skor);

    var rowsPenerima = penerima.length === 0
        ? `<div style="color:#6b7280;font-size:12px;text-align:center;padding:12px">Belum ada penduduk dalam radius ini.</div>`
        : penerima.map(p => {
            var sl = getSkorLabel(p.skor);
            return `<div style="display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px solid #1e2233;">
                <span style="font-size:16px;min-width:20px">${sl.emoji}</span>
                <div style="flex:1;min-width:0">
                    <div style="font-size:12px;font-weight:600;color:#e2e8f0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis">${p.nama || '—'}</div>
                    <div style="font-size:10px;color:#6b7280">Skor: ${fmtNum(p.skor,1)} · ${sl.label}</div>
                </div>
                <span title="${p.jenis}" style="font-size:16px">${getJenisIcon(p.jenis)}</span>
            </div>`;
          }).join('');

    return `<div class="ip" style="min-width:280px">
        <div class="ip-head" style="background:linear-gradient(135deg,#92400e,#f59e0b)">🕌 ${d.nama}</div>
        <div style="display:flex;border-bottom:1px solid #1e2233;margin-bottom:8px">
            <button id="tab1_${d.id}" onclick="switchTab(${d.id},1)" style="flex:1;padding:7px;font-size:11px;background:#1e2233;border:none;color:#f59e0b;cursor:pointer;font-weight:600">📋 Profil</button>
            <button id="tab2_${d.id}" onclick="switchTab(${d.id},2)" style="flex:1;padding:7px;font-size:11px;background:transparent;border:none;color:#6b7280;cursor:pointer">👥 Penerima (${penerima.length})</button>
        </div>
        <div id="tabContent1_${d.id}" class="ip-body">
            <div class="ip-row"><span class="ip-label">PIC</span><span class="ip-val">${d.pic}</span></div>
            <div class="ip-row"><span class="ip-label">Radius Layanan</span><span class="ip-val">${fmtNum(d.radius,0)} m</span></div>
            <div class="ip-row"><span class="ip-label">Jml. Ditanggung</span><span class="ip-val" style="color:#f59e0b;font-weight:700">${penerima.length} KK</span></div>
        </div>
        <div id="tabContent2_${d.id}" class="ip-body" style="display:none;max-height:220px;overflow-y:auto">
            ${rowsPenerima}
        </div>
    </div>`;
}

function switchTab(id, tab) {
    document.getElementById('tabContent1_' + id).style.display = tab === 1 ? '' : 'none';
    document.getElementById('tabContent2_' + id).style.display = tab === 2 ? '' : 'none';
    document.getElementById('tab1_' + id).style.background = tab === 1 ? '#1e2233' : 'transparent';
    document.getElementById('tab1_' + id).style.color = tab === 1 ? '#f59e0b' : '#6b7280';
    document.getElementById('tab2_' + id).style.background = tab === 2 ? '#1e2233' : 'transparent';
    document.getElementById('tab2_' + id).style.color = tab === 2 ? '#f59e0b' : '#6b7280';
}

/* ── POPUP PENDUDUK ── */
function buildPendudukPopup(d) {
    var skor = parseFloat(d.skor_kerentanan) || 0;
    var sl = getSkorLabel(skor);
    var pLat = parseFloat(d.latitude), pLng = parseFloat(d.longitude);
    var penanggung = findMasjidPenanggung(pLat, pLng);

    var penanggungHtml = penanggung
        ? `<div class="ip-row"><span class="ip-label">Masjid Penanggung</span><span class="ip-val" style="color:#f59e0b;font-weight:600">🕌 ${penanggung.nama}</span></div>`
        : `<div class="ip-row"><span class="ip-label">Status</span><span class="ip-val" style="color:#ef4444;font-weight:600">⚠️ Blind Spot</span></div>`;

    var jenisIcon = getJenisIcon(d.jenis_bantuan);

    return `<div class="ip">
        <div class="ip-head" style="background:linear-gradient(135deg,#701a75,#e879f9)">👨‍👩‍👧‍👦 KK — ${d.nama_kk}</div>
        <div class="ip-body">
            <div class="ip-row"><span class="ip-label">Jml. Anggota KK</span><span class="ip-val">${d.jumlah_anggota} orang</span></div>
            <div class="ip-row"><span class="ip-label">Alamat</span><span class="ip-val" style="font-size:11px">${d.alamat}</span></div>
            <div class="ip-row"><span class="ip-label">Penghasilan</span><span class="ip-val">${d.penghasilan}</span></div>
            <div class="ip-row"><span class="ip-label">Kondisi Rumah</span><span class="ip-val">${d.kondisi_rumah}</span></div>
            <div class="ip-row"><span class="ip-label">Sumber Air</span><span class="ip-val">${d.sumber_air}</span></div>
            <div class="ip-row">
                <span class="ip-label">Skor Kerentanan</span>
                <span class="ip-val" style="color:${sl.color};font-weight:700">${sl.emoji} ${fmtNum(skor,1)} — ${sl.label}</span>
            </div>
            ${penanggungHtml}
            <div class="ip-row">
                <span class="ip-label">Jenis Bantuan</span>
                <span class="ip-val">${jenisIcon} ${d.jenis_bantuan || '—'}</span>
            </div>
        </div>
    </div>`;
}

/* ============================================================
   LOAD DATA
   ============================================================ */
fetch('../php/show_sosial.php')
    .then(res => res.json())
    .then(data => {
        var pendudukRaw = [];

        data.forEach(d => {
            if (d.type === 'masjid') {
                var mLat=parseFloat(d.latitude), mLng=parseFloat(d.longitude);
                var mR = parseFloat(d.radius_layanan) || parseFloat(d.radius) || 500;
                var circle = L.circle([mLat,mLng], { radius:mR, color:'#f59e0b', fillColor:'#f59e0b', fillOpacity:0.08, weight:2, dashArray:'6 4' });
                layerGroupMasjid.addLayer(circle);
                var mEntry = { id:parseInt(d.id), lat:mLat, lng:mLng, radius:mR, nama:d.nama, pic:d.pic, circleLayer:circle };
                masjidData.push(mEntry);
                var marker = L.marker([mLat,mLng], { icon:makeMasjidIcon() });
                marker._type='masjid'; marker._db_id=d.id;
                mEntry.markerLayer = marker;
                layerGroupMasjid.addLayer(marker);
            }
            if (d.type === 'penduduk') pendudukRaw.push(d);
        });

        var heatPoints = [];
        pendudukRaw.forEach(d => {
            var pLat=parseFloat(d.latitude), pLng=parseFloat(d.longitude);
            var skor = parseFloat(d.skor_kerentanan) || 0;
            var inRadius=false, minDist=Infinity;
            masjidData.forEach(m => {
                var dist = map.distance([pLat,pLng],[m.lat,m.lng]);
                if (dist<=m.radius && dist<minDist) { minDist=dist; inRadius=true; }
            });

            var pEntry = { id:parseInt(d.id), lat:pLat, lng:pLng, skor, jenis:d.jenis_bantuan, nama:d.nama_kk, inRadius, rawData:d };
            pendudukData.push(pEntry);

            var marker = L.marker([pLat,pLng], { icon:makePendudukIcon(inRadius) });
            marker._type='penduduk'; marker._db_id=d.id;
            pEntry.markerLayer = marker;
            marker.bindPopup(() => buildPendudukPopup(d), { maxWidth:300 });
            layerGroupPenduduk.addLayer(marker);

            heatPoints.push([pLat, pLng, skor / 100]);
        });

        // Bind masjid popups
        masjidData.forEach(m => {
            m.markerLayer.bindPopup(() => buildMasjidPopup(m), { maxWidth:310 });
        });

        // Init heatmap
        if (typeof L.heatLayer !== 'undefined') {
            heatmapLayer = L.heatLayer(heatPoints, {
                radius: 35, blur: 25, maxZoom: 16,
                gradient: { 0.0:'#3b82f6', 0.4:'#eab308', 0.7:'#f97316', 1.0:'#ef4444' }
            });
        }

        checkBlindSpots();
        renderStats();
    })
    .catch(err => console.error('Gagal load data:', err));

/* ============================================================
   BLIND SPOT
   ============================================================ */
function checkBlindSpots() {
    blindSpotIds = [];
    pendudukData.forEach(p => {
        if (!p.inRadius && p.skor >= 70) {
            blindSpotIds.push(p.id);
            p.markerLayer.setIcon(makePendudukIcon(false, true));
        }
    });
    var panel = document.getElementById('blindSpotPanel');
    if (!panel) return;
    if (blindSpotIds.length > 0) {
        panel.style.display = 'flex';
        document.getElementById('blindSpotCount').textContent = blindSpotIds.length;
    } else {
        panel.style.display = 'none';
    }
}

function zoomToBlindSpots() {
    if (blindSpotIds.length === 0) return;
    var bounds = pendudukData.filter(p => blindSpotIds.includes(p.id)).map(p => [p.lat, p.lng]);
    if (bounds.length > 0) map.fitBounds(bounds, { padding:[60,60] });
}

/* ============================================================
   STATS PANEL
   ============================================================ */
function renderStats() {
    var total  = pendudukData.length;
    var sangat = pendudukData.filter(p => p.skor >= 70).length;
    var rentan = pendudukData.filter(p => p.skor >= 40 && p.skor < 70).length;
    var cukup  = pendudukData.filter(p => p.skor < 40).length;
    var bs     = blindSpotIds.length;

    var jenisCounts = {};
    JENIS_BANTUAN_OPTS.forEach(o => jenisCounts[o.value] = 0);
    pendudukData.forEach(p => {
        if (jenisCounts[p.jenis] !== undefined) jenisCounts[p.jenis]++;
        else jenisCounts['BLT / Modal Usaha']++;
    });

    var jenisRows = JENIS_BANTUAN_OPTS.map(o =>
        `<div style="display:flex;justify-content:space-between;align-items:center;padding:3px 0;font-size:11px">
            <span style="color:#9ca3af">${o.icon} ${o.value}</span>
            <span style="font-weight:700;color:#e2e8f0">${jenisCounts[o.value]}</span>
        </div>`
    ).join('');

    var el = document.getElementById('statsContent');
    if (!el) return;
    el.innerHTML = `
        <div class="stat-row" style="margin-bottom:10px">
            <div class="stat-item"><div class="stat-num">${total}</div><div class="stat-lbl">Total Warga</div></div>
            <div class="stat-item"><div class="stat-num" style="color:#ef4444">${sangat}</div><div class="stat-lbl">🔴 Sgt. Rentan</div></div>
            <div class="stat-item"><div class="stat-num" style="color:#f97316">${rentan}</div><div class="stat-lbl">🟠 Rentan</div></div>
            <div class="stat-item"><div class="stat-num" style="color:#eab308">${cukup}</div><div class="stat-lbl">🟡 Cukup</div></div>
        </div>
        <div style="border-top:1px solid #1e2233;padding-top:8px;margin-bottom:8px">
            <div style="font-size:10px;color:#6b7280;font-weight:600;margin-bottom:6px;text-transform:uppercase;letter-spacing:0.05em">Jenis Bantuan Dibutuhkan</div>
            ${jenisRows}
        </div>
        <div style="border-top:1px solid #1e2233;padding-top:8px">
            <div style="display:flex;justify-content:space-between;font-size:11px">
                <span style="color:#9ca3af">⚠️ Blind Spot (skor ≥70)</span>
                <span style="font-weight:700;color:${bs>0?'#ef4444':'#4ade80'}">${bs} KK</span>
            </div>
        </div>`;
}

function toggleStats() {
    var content = document.getElementById('statsContent');
    var btn = document.getElementById('statsToggleBtn');
    if (content.style.display === 'none') {
        content.style.display = 'block'; btn.textContent = '▲';
    } else {
        content.style.display = 'none'; btn.textContent = '▼';
    }
}