<?php
// ============================================================
//  api_parsil.php – REST API CRUD Data Parsil Tanah (Polygon)
//  GET    api_parsil.php          → semua data parsil
//  GET    api_parsil.php?id=N     → satu data parsil
//  POST   api_parsil.php          → tambah parsil
//  PUT    api_parsil.php?id=N     → update parsil
//  DELETE api_parsil.php?id=N     → hapus parsil
// ============================================================

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'];
$id     = isset($_GET['id']) ? (int) $_GET['id'] : null;

// ── GET ──────────────────────────────────────────────────────
if ($method === 'GET') {
    $conn = getConnection();

    if ($id) {
        $stmt = $conn->prepare("SELECT * FROM parsil_tanah WHERE id = ?");
        $stmt->bind_param('i', $id);
        $stmt->execute();
        $row = $stmt->get_result()->fetch_assoc();
        if ($row) {
            $row['id']          = (int)   $row['id'];
            $row['luas_meter2'] = (float) $row['luas_meter2'];
            $row['geojson']     = json_decode($row['geojson']);
            echo json_encode(['status' => 'success', 'data' => $row]);
        } else {
            http_response_code(404);
            echo json_encode(['status' => 'error', 'message' => 'Data tidak ditemukan']);
        }
        $stmt->close();
    } else {
        $res  = $conn->query("SELECT * FROM parsil_tanah ORDER BY created_at DESC");
        $data = [];
        while ($row = $res->fetch_assoc()) {
            $row['id']          = (int)   $row['id'];
            $row['luas_meter2'] = (float) $row['luas_meter2'];
            $row['geojson']     = json_decode($row['geojson']);
            $data[] = $row;
        }
        echo json_encode(['status' => 'success', 'data' => $data]);
    }
    $conn->close();
    exit;
}

// ── POST (Tambah) ─────────────────────────────────────────────
if ($method === 'POST') {
    $body = json_decode(file_get_contents('php://input'), true);

    $nama     = trim($body['nama_pemilik']       ?? '');
    $no_sert  = trim($body['no_sertifikat']      ?? '');
    $status   = $body['status_sertifikat']        ?? '';
    $luas     = (float) ($body['luas_meter2']    ?? 0);
    $geojson  = isset($body['geojson'])
                ? json_encode($body['geojson'])
                : null;

    $valid_status = ['SHM', 'HGB', 'HGU', 'HP'];
    if (!$nama || !$no_sert || !in_array($status, $valid_status) || !$geojson || $luas <= 0) {
        http_response_code(400);
        echo json_encode(['status' => 'error', 'message' => 'Data tidak lengkap atau tidak valid']);
        exit;
    }

    $conn = getConnection();
    $stmt = $conn->prepare(
        "INSERT INTO parsil_tanah (nama_pemilik, no_sertifikat, status_sertifikat, luas_meter2, geojson)
         VALUES (?, ?, ?, ?, ?)"
    );
    $stmt->bind_param('sssds', $nama, $no_sert, $status, $luas, $geojson);

    if ($stmt->execute()) {
        echo json_encode([
            'status'  => 'success',
            'message' => 'Data parsil berhasil ditambahkan',
            'id'      => $stmt->insert_id
        ]);
    } else {
        http_response_code(500);
        echo json_encode(['status' => 'error', 'message' => $stmt->error]);
    }
    $stmt->close();
    $conn->close();
    exit;
}

// ── PUT (Update) ──────────────────────────────────────────────
if ($method === 'PUT' && $id) {
    $body = json_decode(file_get_contents('php://input'), true);

    $nama     = trim($body['nama_pemilik']       ?? '');
    $no_sert  = trim($body['no_sertifikat']      ?? '');
    $status   = $body['status_sertifikat']        ?? '';
    $luas     = (float) ($body['luas_meter2']    ?? 0);
    $geojson  = isset($body['geojson'])
                ? json_encode($body['geojson'])
                : null;

    $valid_status = ['SHM', 'HGB', 'HGU', 'HP'];
    if (!$nama || !$no_sert || !in_array($status, $valid_status) || !$geojson || $luas <= 0) {
        http_response_code(400);
        echo json_encode(['status' => 'error', 'message' => 'Data tidak lengkap atau tidak valid']);
        exit;
    }

    $conn = getConnection();
    $stmt = $conn->prepare(
        "UPDATE parsil_tanah
         SET nama_pemilik=?, no_sertifikat=?, status_sertifikat=?, luas_meter2=?, geojson=?
         WHERE id=?"
    );
    $stmt->bind_param('sssdsi', $nama, $no_sert, $status, $luas, $geojson, $id);

    if ($stmt->execute()) {
        echo json_encode(['status' => 'success', 'message' => 'Data parsil berhasil diperbarui']);
    } else {
        http_response_code(500);
        echo json_encode(['status' => 'error', 'message' => $stmt->error]);
    }
    $stmt->close();
    $conn->close();
    exit;
}

// ── DELETE ────────────────────────────────────────────────────
if ($method === 'DELETE' && $id) {
    $conn = getConnection();
    $stmt = $conn->prepare("DELETE FROM parsil_tanah WHERE id=?");
    $stmt->bind_param('i', $id);

    if ($stmt->execute()) {
        echo json_encode(['status' => 'success', 'message' => 'Data parsil berhasil dihapus']);
    } else {
        http_response_code(500);
        echo json_encode(['status' => 'error', 'message' => $stmt->error]);
    }
    $stmt->close();
    $conn->close();
    exit;
}

http_response_code(405);
echo json_encode(['status' => 'error', 'message' => 'Method tidak diizinkan']);