<?php
// api/wilayah.php v2.0
// ============================================================
// API Data Wilayah (RT/RW/Kelurahan/Kecamatan)
// ============================================================
require_once __DIR__ . '/../includes/config.php';

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') exit;

$method = $_SERVER['REQUEST_METHOD'];
$db     = getDB();

switch ($method) {

    // ── GET semua wilayah atau per filter ─────────────────
    case 'GET':
        $kelurahan = $_GET['kelurahan'] ?? null;
        $kecamatan = $_GET['kecamatan'] ?? null;

        // GET /api/wilayah.php?list=kelurahan → distinct kelurahan
        if (isset($_GET['list'])) {
            $type = $_GET['list'];
            if ($type === 'kelurahan') {
                $rows = $db->query("SELECT DISTINCT kelurahan, kecamatan FROM wilayah ORDER BY kelurahan")->fetchAll();
                jsonResponse(['success' => true, 'data' => $rows]);
            }
            if ($type === 'kecamatan') {
                $rows = $db->query("SELECT DISTINCT kecamatan FROM wilayah ORDER BY kecamatan")->fetchAll();
                jsonResponse(['success' => true, 'data' => array_column($rows, 'kecamatan')]);
            }
        }

        $sql    = "SELECT * FROM wilayah WHERE 1=1";
        $params = [];
        if ($kelurahan) { $sql .= " AND kelurahan = ?"; $params[] = $kelurahan; }
        if ($kecamatan) { $sql .= " AND kecamatan = ?"; $params[] = $kecamatan; }
        $sql .= " ORDER BY kelurahan, rt, rw";

        $stmt = $db->prepare($sql);
        $stmt->execute($params);
        jsonResponse(['success' => true, 'data' => $stmt->fetchAll()]);
        break;

    // ── POST tambah wilayah ───────────────────────────────
    case 'POST':
        $in = getInput();
        if (empty($in['kelurahan']) || empty($in['kecamatan'])) {
            jsonResponse(['success' => false, 'error' => 'Kelurahan dan kecamatan wajib diisi'], 400);
        }
        $db->prepare("INSERT INTO wilayah (kelurahan, kecamatan, kota, rt, rw) VALUES (?,?,?,?,?)")
           ->execute([
               trim($in['kelurahan']),
               trim($in['kecamatan']),
               trim($in['kota'] ?? 'Pontianak'),
               $in['rt'] ?? null,
               $in['rw'] ?? null,
           ]);
        jsonResponse(['success' => true, 'id' => $db->lastInsertId(), 'message' => 'Wilayah ditambahkan']);
        break;

    default:
        jsonResponse(['success' => false, 'error' => 'Method tidak diizinkan'], 405);
}