<?php
// ============================================================
// API – Manajemen Data Jalan (Line / Polyline)
// 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 (semua atau satu record) ────────────────────────
    case 'GET':
        if (isset($_GET['id'])) {
            $id  = (int) $_GET['id'];
            $sql = "SELECT * FROM data_jalan WHERE id = ?";
            $stmt = $conn->prepare($sql);
            $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 {
            $sql  = "SELECT * FROM data_jalan ORDER BY id DESC";
            $rows = $conn->query($sql)->fetch_all(MYSQLI_ASSOC);
            foreach ($rows as &$r) {
                $r['geojson'] = json_decode($r['geojson']);
            }
            jsonResponse(['status' => 'success', 'data' => $rows]);
        }
        break;

    // ── CREATE ───────────────────────────────────────────────
    case 'POST':
        $nama_jalan   = clean($input['nama_jalan']   ?? '');
        $status_jalan = clean($input['status_jalan'] ?? '');
        $panjang_m    = (float)  ($input['panjang_m']    ?? 0);
        $keterangan   = clean($input['keterangan']   ?? '');
        $geojson      = $input['geojson'] ?? null;

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

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

        $sql  = "INSERT INTO data_jalan (nama_jalan, status_jalan, panjang_m, geojson, keterangan) VALUES (?, ?, ?, ?, ?)";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param('ssdss', $nama_jalan, $status_jalan, $panjang_m, $geojsonStr, $keterangan);

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

    // ── UPDATE ───────────────────────────────────────────────
    case 'PUT':
        $id           = (int)    ($input['id']           ?? 0);
        $nama_jalan   = clean($input['nama_jalan']   ?? '');
        $status_jalan = clean($input['status_jalan'] ?? '');
        $panjang_m    = (float)  ($input['panjang_m']    ?? 0);
        $keterangan   = clean($input['keterangan']   ?? '');
        $geojson      = $input['geojson'] ?? null;

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

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

        $sql  = "UPDATE data_jalan SET nama_jalan=?, status_jalan=?, panjang_m=?, geojson=?, keterangan=? WHERE id=?";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param('ssdssi', $nama_jalan, $status_jalan, $panjang_m, $geojsonStr, $keterangan, $id);

        if ($stmt->execute()) {
            jsonResponse(['status' => 'success', 'message' => 'Data jalan 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_jalan WHERE id = ?");
        $stmt->bind_param('i', $id);

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

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