<?php
// ============================================================
// API – Manajemen Data Parsil Tanah (Polygon)
// Mendukung: GET (list & detail), POST (create),
//            PUT (update), DELETE (hapus)
// ============================================================
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(0); }

require_once 'config.php';

$method = $_SERVER['REQUEST_METHOD'];
$input  = json_decode(file_get_contents('php://input'), true) ?? [];

// ── Router ───────────────────────────────────────────────────
switch ($method) {

    // ── READ ─────────────────────────────────────────────────
    case 'GET':
        if (isset($_GET['id'])) {
            $id   = (int) $_GET['id'];
            $stmt = $conn->prepare("SELECT * FROM data_parsil WHERE id = ?");
            $stmt->bind_param('i', $id);
            $stmt->execute();
            $row = $stmt->get_result()->fetch_assoc();
            if ($row) {
                $row['geojson'] = json_decode($row['geojson']);
                jsonResponse(['status' => 'success', 'data' => $row]);
            } else {
                jsonResponse(['status' => 'error', 'message' => 'Data tidak ditemukan'], 404);
            }
        } else {
            $rows = $conn->query("SELECT * FROM data_parsil ORDER BY id DESC")->fetch_all(MYSQLI_ASSOC);
            foreach ($rows as &$r) {
                $r['geojson'] = json_decode($r['geojson']);
            }
            jsonResponse(['status' => 'success', 'data' => $rows]);
        }
        break;

    // ── CREATE ───────────────────────────────────────────────
    case 'POST':
        $nama_parsil = clean($input['nama_parsil'] ?? '');
        $status_hak  = clean($input['status_hak']  ?? '');
        $luas_m2     = (float) ($input['luas_m2']     ?? 0);
        $pemilik     = clean($input['pemilik']     ?? '');
        $keterangan  = clean($input['keterangan']  ?? '');
        $geojson     = $input['geojson'] ?? null;

        if (!$nama_parsil || !$status_hak || !$geojson) {
            jsonResponse(['status' => 'error', 'message' => 'Field nama_parsil, status_hak, dan geojson wajib diisi'], 400);
        }

        $geojsonStr = is_string($geojson) ? $geojson : json_encode($geojson);

        $sql  = "INSERT INTO data_parsil (nama_parsil, status_hak, luas_m2, geojson, pemilik, keterangan) VALUES (?, ?, ?, ?, ?, ?)";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param('ssdsss', $nama_parsil, $status_hak, $luas_m2, $geojsonStr, $pemilik, $keterangan);

        if ($stmt->execute()) {
            jsonResponse(['status' => 'success', 'message' => 'Data parsil berhasil ditambahkan', 'id' => $conn->insert_id], 201);
        } else {
            jsonResponse(['status' => 'error', 'message' => $conn->error], 500);
        }
        break;

    // ── UPDATE ───────────────────────────────────────────────
    case 'PUT':
        $id          = (int)    ($input['id']          ?? 0);
        $nama_parsil = clean($input['nama_parsil'] ?? '');
        $status_hak  = clean($input['status_hak']  ?? '');
        $luas_m2     = (float)  ($input['luas_m2']     ?? 0);
        $pemilik     = clean($input['pemilik']     ?? '');
        $keterangan  = clean($input['keterangan']  ?? '');
        $geojson     = $input['geojson'] ?? null;

        if (!$id || !$nama_parsil || !$status_hak || !$geojson) {
            jsonResponse(['status' => 'error', 'message' => 'Field id, nama_parsil, status_hak, dan geojson wajib diisi'], 400);
        }

        $geojsonStr = is_string($geojson) ? $geojson : json_encode($geojson);

        $sql  = "UPDATE data_parsil SET nama_parsil=?, status_hak=?, luas_m2=?, geojson=?, pemilik=?, keterangan=? WHERE id=?";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param('ssdsssi', $nama_parsil, $status_hak, $luas_m2, $geojsonStr, $pemilik, $keterangan, $id);

        if ($stmt->execute()) {
            jsonResponse(['status' => 'success', 'message' => 'Data parsil berhasil diperbarui']);
        } else {
            jsonResponse(['status' => 'error', 'message' => $conn->error], 500);
        }
        break;

    // ── DELETE ───────────────────────────────────────────────
    case 'DELETE':
        $id = (int) ($_GET['id'] ?? ($input['id'] ?? 0));

        if (!$id) {
            jsonResponse(['status' => 'error', 'message' => 'Parameter id wajib diisi'], 400);
        }

        $stmt = $conn->prepare("DELETE FROM data_parsil WHERE id = ?");
        $stmt->bind_param('i', $id);

        if ($stmt->execute() && $stmt->affected_rows > 0) {
            jsonResponse(['status' => 'success', 'message' => 'Data parsil berhasil dihapus']);
        } else {
            jsonResponse(['status' => 'error', 'message' => 'Data tidak ditemukan atau gagal dihapus'], 404);
        }
        break;

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