<?php
session_start();
// Cek apakah pengguna sudah login
if (!isset($_SESSION['loggedin']) || $_SESSION['loggedin'] !== true) {
    header('Location: ../auth/login.php');
    exit;
}

// Include file koneksi ke database
include '../config/database.php';

// Cek jika data dikirim dari form
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Ambil data dari form
    $kegiatan_id = isset($_POST['kegiatan_id']) ? intval($_POST['kegiatan_id']) : 0;
    $kegiatan_nama = mysqli_real_escape_string($conn, $_POST['kegiatan_nama']);
    $kegiatan_keterangan = mysqli_real_escape_string($conn, $_POST['kegiatan_keterangan']);
    $kegiatan_tglmulai = mysqli_real_escape_string($conn, $_POST['kegiatan_tglmulai']);
    $kegiatan_tglakhir = mysqli_real_escape_string($conn, $_POST['kegiatan_tglakhir']);

    // Variabel untuk gambar
    $gambar_baru = null;
    $gambar_lama = '';

    if (isset($_FILES['kegiatan_gambar']) && $_FILES['kegiatan_gambar']['error'] == 0) {
        // Proses upload gambar
        $target_dir = "../assets/img/kegiatan/";
        $target_file = $target_dir . basename($_FILES["kegiatan_gambar"]["name"]);
        $uploadOk = 1;
        $imageFileType = strtolower(pathinfo($target_file, PATHINFO_EXTENSION));

        // Cek jika file gambar valid
        $check = getimagesize($_FILES["kegiatan_gambar"]["tmp_name"]);
        if ($check !== false) {
            $uploadOk = 1;
        } else {
            $uploadOk = 0;
        }

        // Cek jika file sudah ada
        if (file_exists($target_file)) {
            $uploadOk = 0;
        }

        // Cek ukuran file
        if ($_FILES["kegiatan_gambar"]["size"] > 500000) {
            $uploadOk = 0;
        }

        // Cek format gambar
        if ($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg" && $imageFileType != "gif") {
            $uploadOk = 0;
        }

        // Cek jika $uploadOk == 0 berarti ada kesalahan
        if ($uploadOk == 0) {
            echo "Maaf, gambar tidak dapat diunggah.";
        } else {
            if (move_uploaded_file($_FILES["kegiatan_gambar"]["tmp_name"], $target_file)) {
                $gambar_baru = basename($_FILES["kegiatan_gambar"]["name"]);
            } else {
                echo "Maaf, terjadi kesalahan saat mengunggah gambar.";
            }
        }

        // Dapatkan nama gambar lama dari database
        $query = "SELECT kegiatan_gambar FROM kegiatan WHERE kegiatan_id = $kegiatan_id";
        $result = mysqli_query($conn, $query);
        if ($result && mysqli_num_rows($result) > 0) {
            $row = mysqli_fetch_assoc($result);
            $gambar_lama = $row['kegiatan_gambar'];
        }
    }

    // Query untuk update data kegiatan
    $query = "UPDATE kegiatan SET
                kegiatan_nama = '$kegiatan_nama',
                kegiatan_keterangan = '$kegiatan_keterangan',
                kegiatan_tglmulai = '$kegiatan_tglmulai',
                kegiatan_tglakhir = '$kegiatan_tglakhir'";

    if ($gambar_baru) {
        $query .= ", kegiatan_gambar = '$gambar_baru'";
        // Hapus gambar lama jika ada
        if ($gambar_lama) {
            $old_image_path = "../assets/img/kegiatan/" . $gambar_lama;
            if (file_exists($old_image_path)) {
                unlink($old_image_path);
            }
        }
    }

    $query .= " WHERE kegiatan_id = $kegiatan_id";

    if (mysqli_query($conn, $query)) {
        header('Location: kelolakegiatan.php?status=success');
    } else {
        echo "Error updating record: " . mysqli_error($conn);
    }

    // Tutup koneksi
    mysqli_close($conn);
} else {
    // Jika tidak POST, redirect ke halaman kelola kegiatan
    header('Location: kelolakegiatan.php');
}
?>