<?php
// ============================================================
// API: Dashboard Walikota — Data agregasi read-only
// GET: walikota + admin only
// ============================================================
require_once __DIR__ . '/config.php';

$method = $_SERVER['REQUEST_METHOD'];

if ($method !== 'GET') {
    jsonResponse(null, 'Hanya metode GET yang didukung.', false, 405);
}

$user = requireRole(['admin', 'walikota']);

$tahun = isset($_GET['tahun']) ? (int)$_GET['tahun'] : (int)date('Y');

// ── 1. Total KK per kecamatan ─────────────────────────────────
$stmt = $pdo->query("
    SELECT kecamatan, COUNT(*) AS jumlah
    FROM keluarga_miskin
    GROUP BY kecamatan
    ORDER BY FIELD(kecamatan,
        'Pontianak Utara','Pontianak Selatan','Pontianak Timur',
        'Pontianak Barat','Pontianak Tenggara','Pontianak Kota')
");
$kkPerKecamatan = $stmt->fetchAll();

// ── 2. KK yang SUDAH dapat bantuan tahun ini (dari histori_bantuan) ──
$stmt = $pdo->prepare("
    SELECT COUNT(DISTINCT kk_id) AS jumlah
    FROM histori_bantuan
    WHERE YEAR(tanggal_penyaluran) = ?
");
$stmt->execute([$tahun]);
$kkSudahBantuan = (int)$stmt->fetch()['jumlah'];

// ── 3. Total KK ───────────────────────────────────────────────
$stmt = $pdo->query("SELECT COUNT(*) AS jumlah FROM keluarga_miskin");
$totalKK = (int)$stmt->fetch()['jumlah'];

$kkBelumBantuan = $totalKK - $kkSudahBantuan;

// ── 4. Distribusi status DTKS ────────────────────────────────
$stmt = $pdo->query("
    SELECT status_dtks, COUNT(*) AS jumlah
    FROM keluarga_miskin
    GROUP BY status_dtks
");
$distribusiDtks = $stmt->fetchAll();

// ── 5. Distribusi riwayat penyakit ───────────────────────────
$stmt = $pdo->query("SELECT riwayat_penyakit FROM keluarga_miskin WHERE riwayat_penyakit IS NOT NULL AND riwayat_penyakit != '[]'");
$penyakitRows = $stmt->fetchAll();
$penyakitCount = [];
foreach ($penyakitRows as $row) {
    $arr = json_decode($row['riwayat_penyakit'], true) ?? [];
    foreach ($arr as $p) {
        $penyakitCount[$p] = ($penyakitCount[$p] ?? 0) + 1;
    }
}
arsort($penyakitCount);
// Format jadi array [{ penyakit, jumlah }]
$distribusiPenyakit = array_map(
    fn($k, $v) => ['penyakit' => $k, 'jumlah' => $v],
    array_keys($penyakitCount),
    array_values($penyakitCount)
);

// ── 6. Laporan belum ditangani ────────────────────────────────
$stmt = $pdo->query("SELECT COUNT(*) AS jumlah FROM laporan_masyarakat WHERE status = 'Baru'");
$laporanBaru = (int)$stmt->fetch()['jumlah'];

// ── 7. Bantuan tersalurkan tahun ini per sumber dana ─────────
$stmt = $pdo->prepare("
    SELECT sumber_dana,
        COUNT(*) AS jumlah_entri,
        COUNT(DISTINCT kk_id) AS jumlah_kk,
        COALESCE(SUM(nominal), 0) AS total_nominal
    FROM histori_bantuan
    WHERE YEAR(tanggal_penyaluran) = ?
    GROUP BY sumber_dana
    ORDER BY total_nominal DESC
");
$stmt->execute([$tahun]);
$bantuanPerSumber = $stmt->fetchAll();

// Format nominal di setiap baris
foreach ($bantuanPerSumber as &$b) {
    $b['total_nominal_formatted'] = 'Rp ' . number_format((int)$b['total_nominal'], 0, ',', '.');
}
unset($b);

// ── 8. Bantuan tersalurkan tahun ini per jenis ───────────────
$stmt = $pdo->prepare("
    SELECT jenis_bantuan,
        COUNT(*) AS jumlah_entri,
        COUNT(DISTINCT kk_id) AS jumlah_kk,
        COALESCE(SUM(nominal), 0) AS total_nominal
    FROM histori_bantuan
    WHERE YEAR(tanggal_penyaluran) = ?
    GROUP BY jenis_bantuan
    ORDER BY total_nominal DESC
");
$stmt->execute([$tahun]);
$bantuanPerJenis = $stmt->fetchAll();

foreach ($bantuanPerJenis as &$b) {
    $b['total_nominal_formatted'] = 'Rp ' . number_format((int)$b['total_nominal'], 0, ',', '.');
}
unset($b);

// ── 9. Total entri bantuan + total nominal tahun ini ─────────
$stmt = $pdo->prepare("
    SELECT COUNT(*) AS jumlah, COALESCE(SUM(nominal), 0) AS total_nominal
    FROM histori_bantuan WHERE YEAR(tanggal_penyaluran) = ?
");
$stmt->execute([$tahun]);
$totalRow = $stmt->fetch();
$totalEntri  = (int)$totalRow['jumlah'];
$totalNominal = (int)$totalRow['total_nominal'];
$totalNominalFormatted = 'Rp ' . number_format($totalNominal, 0, ',', '.');

// ── 10. Distribusi tingkat kemiskinan ────────────────────────
$stmt = $pdo->query("
    SELECT tingkat_kemiskinan, COUNT(*) AS jumlah
    FROM keluarga_miskin
    GROUP BY tingkat_kemiskinan
");
$distribusiKemiskinan = $stmt->fetchAll();

// ── Kirim semua data ──────────────────────────────────────────
jsonResponse([
    'tahun'                  => $tahun,
    'total_kk'               => $totalKK,
    'kk_per_kecamatan'       => $kkPerKecamatan,
    'kk_sudah_bantuan'       => $kkSudahBantuan,
    'kk_belum_bantuan'       => $kkBelumBantuan,
    'distribusi_dtks'        => $distribusiDtks,
    'distribusi_penyakit'    => $distribusiPenyakit,
    'distribusi_kemiskinan'  => $distribusiKemiskinan,
    'laporan_baru'           => $laporanBaru,
    'bantuan_per_sumber'     => $bantuanPerSumber,
    'bantuan_per_jenis'      => $bantuanPerJenis,
    'total_entri_bantuan'    => $totalEntri,
    'total_nominal_bantuan'  => $totalNominal,
    'total_nominal_formatted'=> $totalNominalFormatted,
], "Data dashboard tahun $tahun.");