<?php
// ============================================================
// API DATA PARSIL TANAH (Polygon)
// File: api_parsil.php
// Method: GET, POST, PUT, DELETE
// Status: SHM, HGB, HGU, HP
// ============================================================

require_once 'config.php';

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

// ---- GET: Ambil semua data atau satu data ----
if ($method === 'GET') {
    $db = getDB();

    if ($id) {
        // Get single
        $stmt = $db->prepare("SELECT id, no_parsil, pemilik, status, luas_m2, geojson FROM data_parsil WHERE id = ?");
        $stmt->bind_param('i', $id);
        $stmt->execute();
        $result = $stmt->get_result()->fetch_assoc();
        if ($result) {
            $result['geojson'] = json_decode($result['geojson']);
            echo json_encode($result);
        } else {
            http_response_code(404);
            echo json_encode(['error' => 'Data tidak ditemukan']);
        }
    } else {
        // Get all
        $result = $db->query("SELECT id, no_parsil, pemilik, status, luas_m2, geojson FROM data_parsil ORDER BY id DESC");
        $rows = [];
        while ($row = $result->fetch_assoc()) {
            $row['geojson'] = json_decode($row['geojson']);
            $rows[] = $row;
        }
        echo json_encode($rows);
    }
    $db->close();
    exit();
}

// ---- POST: Tambah parsil tanah baru ----
if ($method === 'POST') {
    $input = json_decode(file_get_contents('php://input'), true);

    if (empty($input['no_parsil']) || empty($input['pemilik']) || empty($input['status']) || empty($input['geojson'])) {
        http_response_code(400);
        echo json_encode(['error' => 'Data tidak lengkap. Field wajib: no_parsil, pemilik, status, geojson']);
        exit();
    }

    $no_parsil = trim($input['no_parsil']);
    $pemilik   = trim($input['pemilik']);
    $status    = $input['status'];
    $luas_m2   = isset($input['luas_m2']) ? (float)$input['luas_m2'] : 0;
    $geojson   = json_encode($input['geojson']);

    // Validasi status
    $valid_status = ['SHM', 'HGB', 'HGU', 'HP'];
    if (!in_array($status, $valid_status)) {
        http_response_code(400);
        echo json_encode(['error' => 'Status tidak valid. Pilih: SHM, HGB, HGU, atau HP']);
        exit();
    }

    $db   = getDB();
    $stmt = $db->prepare("INSERT INTO data_parsil (no_parsil, pemilik, status, luas_m2, geojson) VALUES (?, ?, ?, ?, ?)");
    $stmt->bind_param('sssds', $no_parsil, $pemilik, $status, $luas_m2, $geojson);

    if ($stmt->execute()) {
        $new_id = $db->insert_id;
        http_response_code(201);
        echo json_encode([
            'message'   => 'Data parsil berhasil disimpan',
            'id'        => $new_id,
            'no_parsil' => $no_parsil,
            'pemilik'   => $pemilik,
            'status'    => $status,
            'luas_m2'   => $luas_m2
        ]);
    } else {
        http_response_code(500);
        echo json_encode(['error' => 'Gagal menyimpan data: ' . $stmt->error]);
    }
    $db->close();
    exit();
}

// ---- PUT: Update data parsil ----
if ($method === 'PUT') {
    if (!$id) {
        http_response_code(400);
        echo json_encode(['error' => 'ID diperlukan untuk update']);
        exit();
    }

    $input = json_decode(file_get_contents('php://input'), true);
    $db    = getDB();

    // Cek apakah hanya update geometri (edit bentuk di peta)
    if (isset($input['geojson']) && !isset($input['no_parsil'])) {
        // Update geometri & luas
        $geojson = json_encode($input['geojson']);
        $luas_m2 = isset($input['luas_m2']) ? (float)$input['luas_m2'] : 0;
        $stmt = $db->prepare("UPDATE data_parsil SET geojson = ?, luas_m2 = ? WHERE id = ?");
        $stmt->bind_param('sdi', $geojson, $luas_m2, $id);
    } else {
        // Full update (edit semua atribut)
        $no_parsil = trim($input['no_parsil'] ?? '');
        $pemilik   = trim($input['pemilik'] ?? '');
        $status    = $input['status'] ?? '';
        $luas_m2   = isset($input['luas_m2']) ? (float)$input['luas_m2'] : 0;
        $geojson   = json_encode($input['geojson'] ?? []);

        $valid_status = ['SHM', 'HGB', 'HGU', 'HP'];
        if (!in_array($status, $valid_status)) {
            http_response_code(400);
            echo json_encode(['error' => 'Status tidak valid']);
            exit();
        }

        $stmt = $db->prepare("UPDATE data_parsil SET no_parsil = ?, pemilik = ?, status = ?, luas_m2 = ?, geojson = ? WHERE id = ?");
        $stmt->bind_param('sssdsi', $no_parsil, $pemilik, $status, $luas_m2, $geojson, $id);
    }

    if ($stmt->execute()) {
        echo json_encode(['message' => 'Data parsil berhasil diperbarui', 'id' => $id]);
    } else {
        http_response_code(500);
        echo json_encode(['error' => 'Gagal memperbarui data: ' . $stmt->error]);
    }
    $db->close();
    exit();
}

// ---- DELETE: Hapus parsil tanah ----
if ($method === 'DELETE') {
    if (!$id) {
        http_response_code(400);
        echo json_encode(['error' => 'ID diperlukan untuk hapus']);
        exit();
    }

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

    if ($stmt->execute()) {
        if ($stmt->affected_rows > 0) {
            echo json_encode(['message' => 'Data parsil berhasil dihapus', 'id' => $id]);
        } else {
            http_response_code(404);
            echo json_encode(['error' => 'Data tidak ditemukan']);
        }
    } else {
        http_response_code(500);
        echo json_encode(['error' => 'Gagal menghapus data: ' . $stmt->error]);
    }
    $db->close();
    exit();
}

// Method tidak dikenal
http_response_code(405);
echo json_encode(['error' => 'Method tidak diizinkan']);
?>