<?php
/**
 * api/wilayah.php — Wilayah (kelurahan) + statistik kemiskinan (KF-06) & CRUD.
 *
 * GET    → FeatureCollection wilayah + persentase_miskin (publik).
 * POST   → tambah wilayah (operator). {nama, kode_wilayah, jenis, jumlah_penduduk, geometry}
 * PUT    ?id= → ubah atribut &/atau geometry (operator).
 * DELETE ?id= → hapus (operator).
 */
require_once __DIR__ . '/../config/db.php';
require_once __DIR__ . '/helpers.php';
require_once __DIR__ . '/../config/activity.php';

$pdo = Database::getConnection();
$method = $_SERVER['REQUEST_METHOD'];
if ($method !== 'GET') requireApiAnyRole(['operator']);

function nnw($v) { return ($v === '' || $v === null) ? null : $v; }

switch ($method) {
    case 'GET':
        $sql = "
            SELECT w.id, w.nama, w.jenis, w.kode_wilayah, w.jumlah_penduduk,
                   COUNT(wm.id) AS jumlah_miskin, ST_AsGeoJSON(w.geom) AS geojson
            FROM wilayah w
            LEFT JOIN warga_miskin wm ON ST_Contains(w.geom, wm.geom)
            GROUP BY w.id ORDER BY w.nama
        ";
        $stmt = $pdo->query($sql);
        $features = [];
        while ($r = $stmt->fetch()) {
            $penduduk = (int)$r['jumlah_penduduk'];
            $miskin   = (int)$r['jumlah_miskin'];
            $persen   = $penduduk > 0 ? round($miskin / $penduduk * 100, 2) : 0;
            $features[] = [
                'type' => 'Feature',
                'geometry' => json_decode($r['geojson']),
                'properties' => [
                    'id' => (int)$r['id'], 'nama' => $r['nama'], 'jenis' => $r['jenis'],
                    'kode_wilayah' => $r['kode_wilayah'], 'jumlah_penduduk' => $penduduk,
                    'jumlah_miskin' => $miskin, 'persentase_miskin' => $persen,
                ],
            ];
        }
        sendSuccess(['type' => 'FeatureCollection', 'features' => $features], 'Data Wilayah');
        break;

    case 'POST':
        $d = getInput();
        if (empty($d['nama']) || empty($d['geometry'])) sendError('Nama & geometri wajib diisi');
        $pdo->prepare("INSERT INTO wilayah (nama, kode_wilayah, jenis, jumlah_penduduk, geom)
                       VALUES (?,?,?,?, ST_GeomFromGeoJSON(?))")
            ->execute([
                $d['nama'], nnw($d['kode_wilayah'] ?? null), $d['jenis'] ?? 'kelurahan',
                (int)($d['jumlah_penduduk'] ?? 0), json_encode($d['geometry']),
            ]);
        $id = (int)$pdo->lastInsertId();
        logActivity($pdo, 'create', 'wilayah', $id, "Tambah wilayah {$d['nama']}");
        sendSuccess(['id' => $id], 'Wilayah disimpan', 201);
        break;

    case 'PUT':
        $d = getInput();
        $id = $_GET['id'] ?? null;
        if (!$id) sendError('ID wajib');
        if (!empty($d['geometry'])) {
            $pdo->prepare("UPDATE wilayah SET nama=?, kode_wilayah=?, jenis=?, jumlah_penduduk=?, geom=ST_GeomFromGeoJSON(?) WHERE id=?")
                ->execute([$d['nama'], nnw($d['kode_wilayah'] ?? null), $d['jenis'] ?? 'kelurahan',
                    (int)($d['jumlah_penduduk'] ?? 0), json_encode($d['geometry']), $id]);
        } else {
            $pdo->prepare("UPDATE wilayah SET nama=?, kode_wilayah=?, jenis=?, jumlah_penduduk=? WHERE id=?")
                ->execute([$d['nama'], nnw($d['kode_wilayah'] ?? null), $d['jenis'] ?? 'kelurahan',
                    (int)($d['jumlah_penduduk'] ?? 0), $id]);
        }
        logActivity($pdo, 'update', 'wilayah', (int)$id, 'Ubah wilayah');
        sendSuccess(null, 'Wilayah diperbarui');
        break;

    case 'DELETE':
        $id = $_GET['id'] ?? null;
        if (!$id) sendError('ID wajib');
        $pdo->prepare("DELETE FROM wilayah WHERE id=?")->execute([$id]);
        logActivity($pdo, 'delete', 'wilayah', (int)$id, 'Hapus wilayah');
        sendSuccess(null, 'Wilayah dihapus');
        break;

    default:
        sendError('Method not allowed', 405);
}