<?php
// =====================================================
// proses.php — Handler CRUD via AJAX + direct request
// =====================================================

header('Content-Type: application/json; charset=utf-8');
include 'koneksi.php';

// ── Sanitasi helper ──────────────────────────────────
function bersih($str) {
    return htmlspecialchars(strip_tags(trim($str)));
}

// ── Routing ─────────────────────────────────────────
$aksi = $_POST['aksi'] ?? $_GET['aksi'] ?? '';

// ============================================================
// CREATE — Simpan objek baru
// ============================================================
if ($aksi === 'simpan') {
    $nama  = bersih($_POST['nama'] ?? '');
    $wa    = bersih($_POST['wa'] ?? '');
    $jam   = ($_POST['jam'] ?? 'Tidak') === 'Ya' ? 'Ya' : 'Tidak';
    $jenis = bersih($_POST['jenis'] ?? '');
    $koord = $_POST['koordinat'] ?? '';

    // Validasi
    if (!$nama) {
        echo json_encode(['status' => 'error', 'message' => 'Nama wajib diisi!']);
        exit;
    }
    $jenis_valid = ['marker', 'polyline', 'polygon'];
    if (!in_array($jenis, $jenis_valid)) {
        echo json_encode(['status' => 'error', 'message' => 'Jenis geometri tidak valid!']);
        exit;
    }
    // Validasi JSON koordinat
    $koord_test = json_decode($koord, true);
    if ($koord_test === null) {
        echo json_encode(['status' => 'error', 'message' => 'Koordinat tidak valid!']);
        exit;
    }

    $stmt = $conn->prepare(
        "INSERT INTO geometri_sigma (nama_objek, no_wa, buka_24jam, jenis_geometri, koordinat) VALUES (?, ?, ?, ?, ?)"
    );
    $stmt->bind_param('sssss', $nama, $wa, $jam, $jenis, $koord);

    if ($stmt->execute()) {
        echo json_encode(['status' => 'ok', 'id' => $stmt->insert_id, 'message' => 'Data berhasil disimpan!']);
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Gagal menyimpan: ' . $stmt->error]);
    }
    $stmt->close();
    exit;
}

// ============================================================
// READ — Ambil semua data (untuk reload tanpa refresh halaman)
// ============================================================
if ($aksi === 'baca') {
    $result = $conn->query("SELECT * FROM geometri_sigma ORDER BY created_at DESC");
    $data = [];
    while ($row = $result->fetch_assoc()) {
        $data[] = $row;
    }
    echo json_encode(['status' => 'ok', 'data' => $data]);
    exit;
}

// ============================================================
// READ SINGLE — Ambil satu data berdasarkan ID
// ============================================================
if ($aksi === 'detail') {
    $id = intval($_GET['id'] ?? 0);
    $stmt = $conn->prepare("SELECT * FROM geometri_sigma WHERE id = ?");
    $stmt->bind_param('i', $id);
    $stmt->execute();
    $row = $stmt->get_result()->fetch_assoc();
    if ($row) {
        echo json_encode(['status' => 'ok', 'data' => $row]);
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Data tidak ditemukan']);
    }
    $stmt->close();
    exit;
}

// ============================================================
// UPDATE — Perbarui data & koordinat
// ============================================================
if ($aksi === 'update') {
    $id    = intval($_POST['id'] ?? 0);
    $nama  = bersih($_POST['nama'] ?? '');
    $wa    = bersih($_POST['wa'] ?? '');
    $jam   = ($_POST['jam'] ?? 'Tidak') === 'Ya' ? 'Ya' : 'Tidak';
    $koord = $_POST['koordinat'] ?? '';

    if (!$id || !$nama) {
        echo json_encode(['status' => 'error', 'message' => 'ID dan Nama wajib ada!']);
        exit;
    }

    $fields = "nama_objek=?, no_wa=?, buka_24jam=?";
    $params = [$nama, $wa, $jam];
    $types  = 'sss';

    // Update koordinat jika dikirim (drag marker / edit polyline/polygon)
    if ($koord) {
        $koord_test = json_decode($koord, true);
        if ($koord_test !== null) {
            $fields .= ", koordinat=?";
            $params[] = $koord;
            $types   .= 's';
        }
    }

    $params[] = $id;
    $types   .= 'i';

    $stmt = $conn->prepare("UPDATE geometri_sigma SET $fields WHERE id = ?");
    $stmt->bind_param($types, ...$params);

    if ($stmt->execute()) {
        echo json_encode(['status' => 'ok', 'message' => 'Data berhasil diperbarui!']);
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Gagal update: ' . $stmt->error]);
    }
    $stmt->close();
    exit;
}

// ============================================================
// UPDATE KOORDINAT SAJA — khusus drag marker
// ============================================================
if ($aksi === 'update_koord') {
    $id    = intval($_POST['id'] ?? 0);
    $koord = $_POST['koordinat'] ?? '';

    if (!$id || !$koord) {
        echo json_encode(['status' => 'error', 'message' => 'ID dan koordinat wajib ada!']);
        exit;
    }

    $stmt = $conn->prepare("UPDATE geometri_sigma SET koordinat=? WHERE id=?");
    $stmt->bind_param('si', $koord, $id);
    if ($stmt->execute()) {
        echo json_encode(['status' => 'ok', 'message' => 'Koordinat diperbarui!']);
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Gagal: ' . $stmt->error]);
    }
    $stmt->close();
    exit;
}

// ============================================================
// DELETE — Hapus berdasarkan ID
// ============================================================
if ($aksi === 'hapus') {
    $id = intval($_POST['id'] ?? $_GET['id'] ?? 0);
    if (!$id) {
        echo json_encode(['status' => 'error', 'message' => 'ID tidak valid!']);
        exit;
    }

    $stmt = $conn->prepare("DELETE FROM geometri_sigma WHERE id=?");
    $stmt->bind_param('i', $id);
    if ($stmt->execute()) {
        echo json_encode(['status' => 'ok', 'message' => 'Data berhasil dihapus!']);
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Gagal hapus: ' . $stmt->error]);
    }
    $stmt->close();
    exit;
}

// ── Default: aksi tidak dikenali ─────────────────────
echo json_encode(['status' => 'error', 'message' => "Aksi '$aksi' tidak dikenali."]);