<?php
// ============================================
// api/tanah.php - CRUD API Data Parsil Tanah
// ============================================

require_once '../config.php';

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

switch ($method) {

    // ── READ ────────────────────────────────────────────────────────
    case 'GET':
        if (isset($_GET['id'])) {
            $id   = intval($_GET['id']);
            $stmt = $db->prepare("SELECT * FROM tanah WHERE id = ?");
            $stmt->bind_param('i', $id);
            $stmt->execute();
            $result = $stmt->get_result();
            $row    = $result->fetch_assoc();
            if ($row) {
                $row['geometry'] = json_decode($row['geometry']);
                echo json_encode(['success' => true, 'data' => $row]);
            } else {
                http_response_code(404);
                echo json_encode(['success' => false, 'message' => 'Data tidak ditemukan']);
            }
        } else {
            $result = $db->query("SELECT * FROM tanah ORDER BY created_at DESC");
            $data   = [];
            while ($row = $result->fetch_assoc()) {
                $row['geometry'] = json_decode($row['geometry']);
                $data[]          = $row;
            }
            echo json_encode(['success' => true, 'data' => $data]);
        }
        break;

    // ── CREATE ──────────────────────────────────────────────────────
    case 'POST':
        $input = json_decode(file_get_contents('php://input'), true);

        if (
            empty($input['kode_kavling'])  ||
            empty($input['nama_pemilik'])  ||
            empty($input['status_tanah'])  ||
            empty($input['geometry'])      ||
            !isset($input['luas'])
        ) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => 'Data tidak lengkap']);
            break;
        }

        $kode_kavling = trim($input['kode_kavling']);
        $nama_pemilik = trim($input['nama_pemilik']);
        $status_tanah = $input['status_tanah'];
        $luas         = floatval($input['luas']);
        $geometry     = json_encode($input['geometry']);

        $valid_status = ['SHM', 'HGB', 'HGU', 'HP'];
        if (!in_array($status_tanah, $valid_status)) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => 'Status tanah tidak valid']);
            break;
        }

        $stmt = $db->prepare(
            "INSERT INTO tanah (kode_kavling, nama_pemilik, status_tanah, luas, geometry) VALUES (?, ?, ?, ?, ?)"
        );
        $stmt->bind_param('sssds', $kode_kavling, $nama_pemilik, $status_tanah, $luas, $geometry);

        if ($stmt->execute()) {
            echo json_encode([
                'success' => true,
                'message' => 'Data tanah berhasil disimpan',
                'id'      => $db->insert_id
            ]);
        } else {
            http_response_code(500);
            echo json_encode(['success' => false, 'message' => 'Gagal menyimpan data']);
        }
        break;

    // ── UPDATE ──────────────────────────────────────────────────────
    case 'PUT':
        $input = json_decode(file_get_contents('php://input'), true);

        if (empty($input['id'])) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => 'ID diperlukan']);
            break;
        }

        $id           = intval($input['id']);
        $kode_kavling = trim($input['kode_kavling']);
        $nama_pemilik = trim($input['nama_pemilik']);
        $status_tanah = $input['status_tanah'];
        $luas         = floatval($input['luas']);
        $geometry     = json_encode($input['geometry']);

        $stmt = $db->prepare(
            "UPDATE tanah SET kode_kavling=?, nama_pemilik=?, status_tanah=?, luas=?, geometry=? WHERE id=?"
        );
        $stmt->bind_param('sssdsi', $kode_kavling, $nama_pemilik, $status_tanah, $luas, $geometry, $id);

        if ($stmt->execute()) {
            echo json_encode(['success' => true, 'message' => 'Data tanah berhasil diupdate']);
        } else {
            http_response_code(500);
            echo json_encode(['success' => false, 'message' => 'Gagal mengupdate data']);
        }
        break;

    // ── DELETE ──────────────────────────────────────────────────────
    case 'DELETE':
        $input = json_decode(file_get_contents('php://input'), true);
        $id    = intval($input['id'] ?? ($_GET['id'] ?? 0));

        if (!$id) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => 'ID diperlukan']);
            break;
        }

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

        if ($stmt->execute() && $stmt->affected_rows > 0) {
            echo json_encode(['success' => true, 'message' => 'Data tanah berhasil dihapus']);
        } else {
            http_response_code(404);
            echo json_encode(['success' => false, 'message' => 'Data tidak ditemukan']);
        }
        break;

    default:
        http_response_code(405);
        echo json_encode(['success' => false, 'message' => 'Method tidak diizinkan']);
}

$db->close();
?>