<?php
// api/export_excel.php v2.0
// ============================================================
// Export Data Penduduk Miskin ke Excel (format CSV UTF-8 BOM)
// Tidak memerlukan library eksternal
// ============================================================
require_once __DIR__ . '/../includes/config.php';

$db = getDB();

// ── Filter dari query string ───────────────────────────────
$kelurahan  = $_GET['kelurahan']  ?? null;
$kecamatan  = $_GET['kecamatan']  ?? null;
$kategori   = $_GET['kategori']   ?? null;
$verifikasi = $_GET['verifikasi'] ?? null;
$bantuan    = $_GET['bantuan']    ?? null;

$where  = "WHERE 1=1";
$params = [];
if ($kelurahan)  { $where .= " AND w.kelurahan = ?";            $params[] = $kelurahan; }
if ($kecamatan)  { $where .= " AND w.kecamatan = ?";            $params[] = $kecamatan; }
if ($kategori)   { $where .= " AND pm.kategori_kemiskinan = ?"; $params[] = $kategori; }
if ($verifikasi) { $where .= " AND pm.status_verifikasi = ?";   $params[] = $verifikasi; }
if ($bantuan === 'tidak') {
    $where .= " AND (SELECT COUNT(*) FROM bantuan_penduduk bp WHERE bp.penduduk_id = pm.id AND bp.status='aktif') = 0";
} elseif ($bantuan === 'ada') {
    $where .= " AND (SELECT COUNT(*) FROM bantuan_penduduk bp WHERE bp.penduduk_id = pm.id AND bp.status='aktif') > 0";
}

$stmt = $db->prepare("
    SELECT
        pm.nik_kk, pm.nama_kk, pm.no_hp,
        pm.alamat, pm.rt, pm.rw,
        COALESCE(w.kelurahan,'–') AS kelurahan,
        COALESCE(w.kecamatan,'–') AS kecamatan,
        pm.jumlah_anggota, pm.jumlah_anak_sekolah,
        pm.penghasilan_bulanan, pm.sumber_penghasilan, pm.status_pekerjaan,
        pm.kategori_kemiskinan, pm.kondisi_rumah, pm.kepemilikan_rumah,
        CASE pm.punya_bpjs WHEN 1 THEN 'Ya' ELSE 'Tidak' END AS punya_bpjs,
        pm.jenis_bpjs,
        pm.lat, pm.lng,
        pm.status_verifikasi,
        COALESCE(u.nama,'–') AS nama_surveyor,
        DATE_FORMAT(pm.created_at,'%d/%m/%Y %H:%i') AS tgl_input,
        (SELECT GROUP_CONCAT(jb.kode ORDER BY jb.kode SEPARATOR ', ')
         FROM bantuan_penduduk bp JOIN jenis_bantuan jb ON jb.id = bp.bantuan_id
         WHERE bp.penduduk_id = pm.id AND bp.status='aktif') AS bantuan_diterima
    FROM penduduk_miskin pm
    LEFT JOIN wilayah w ON w.id = pm.wilayah_id
    LEFT JOIN users   u ON u.id = pm.surveyor_id
    $where
    ORDER BY w.kelurahan, pm.nama_kk
");
$stmt->execute($params);
$rows = $stmt->fetchAll();

// ── Nama file ─────────────────────────────────────────────
$filter = $kelurahan ? "_" . preg_replace('/\s+/', '-', $kelurahan) : '';
$filename = "data_kemiskinan{$filter}_" . date('Ymd_His') . ".csv";

// ── Output header HTTP ─────────────────────────────────────
header('Content-Type: text/csv; charset=UTF-8');
header('Content-Disposition: attachment; filename="' . $filename . '"');
header('Cache-Control: no-cache, no-store, must-revalidate');
header('Pragma: no-cache');

// BOM UTF-8 agar Excel baca karakter Indonesia dengan benar
echo "\xEF\xBB\xBF";

$out = fopen('php://output', 'w');

// ── Header kolom ──────────────────────────────────────────
fputcsv($out, [
    'No','NIK KK','Nama KK','No HP',
    'Alamat','RT','RW','Kelurahan','Kecamatan',
    'Jml Anggota','Anak Sekolah',
    'Penghasilan/Bln','Sumber Penghasilan','Status Pekerjaan',
    'Kategori Kemiskinan','Kondisi Rumah','Kepemilikan Rumah',
    'Punya BPJS','Jenis BPJS',
    'Latitude','Longitude',
    'Status Verifikasi','Bantuan Diterima',
    'Petugas Input','Tgl Input',
], ';');

// ── Data rows ─────────────────────────────────────────────
$no = 1;
foreach ($rows as $r) {
    fputcsv($out, [
        $no++,
        $r['nik_kk'],
        $r['nama_kk'],
        $r['no_hp']               ?? '–',
        $r['alamat']              ?? '–',
        $r['rt']                  ?? '–',
        $r['rw']                  ?? '–',
        $r['kelurahan'],
        $r['kecamatan'],
        $r['jumlah_anggota'],
        $r['jumlah_anak_sekolah'],
        $r['penghasilan_bulanan'] ? 'Rp ' . number_format($r['penghasilan_bulanan'],0,',','.') : '–',
        $r['sumber_penghasilan']  ?? '–',
        ucwords(str_replace('_',' ', $r['status_pekerjaan'])),
        $r['kategori_kemiskinan'] === 'hampir_miskin' ? 'Nyaris Miskin' : ucwords(str_replace('_',' ', $r['kategori_kemiskinan'])),
        ucwords(str_replace('_',' ', $r['kondisi_rumah'])),
        ucwords(str_replace('_',' ', $r['kepemilikan_rumah'])),
        $r['punya_bpjs'],
        strtoupper(str_replace('_',' ', $r['jenis_bpjs'])),
        $r['lat'],
        $r['lng'],
        ucwords(str_replace('_',' ', $r['status_verifikasi'])),
        $r['bantuan_diterima']    ?? 'Belum Ada',
        $r['nama_surveyor'],
        $r['tgl_input'],
    ], ';');
}

fclose($out);
exit;