<?php

// session_start();
include("includes/config.php");

if(isset($_POST['add_gallery'])){
    // $category = $_POST['category'];
    $title = $_POST['title'];

    $photo = $_FILES['photo']['name'];

    $allowed_image_extensions = array('gif','png','jpg','jpeg','webp','WEBP');
 

    $photo_filename = $_FILES['photo']['name'];
    $photo_file_extension = pathinfo($photo_filename, PATHINFO_EXTENSION);

    if(!in_array($photo_file_extension, $allowed_image_extensions)){
        $_SESSION['status'] = "The image file is not allowed. Please upload an image.";
        header('Location: gallery.php');
        exit;

    } else {
        // Inserting data into the database
        $query = "INSERT INTO gallery (title, photo) VALUES ('$title','$photo')";
        $query_run = mysqli_query($conn, $query);

       
        if($query_run){
            move_uploaded_file($_FILES["photo"]["tmp_name"], "gallery/".$_FILES["photo"]["name"]);
          
            $_SESSION['status'] = "Data Uploaded Successfully";
            header('Location: view-gallery.php');
            exit;
        } else {
            $_SESSION['status'] = "Data Not Uploaded Successfully";
            header('Location: gallery.php');
            exit;
        }
    }
}


// update 
if(isset($_POST['update_gallery'])){
    $id = $_POST['id'];
    $title = $_POST['title'];
   
    $old_photo = $_POST['image_old'];
    $update_photo_filename = $_FILES["photo"]["name"] ? $_FILES["photo"]["name"] : $old_photo;


    $allowed_image_extensions = array('gif','png','jpg','jpeg','webp','WEBP');
   

    $photo_file_extension = pathinfo($update_photo_filename, PATHINFO_EXTENSION);

    if(!in_array($photo_file_extension, $allowed_image_extensions)){
        $_SESSION['status'] = "The image file is not allowed. Please upload an image.";
        header("Location: edit-gallery.php?id=$id"); // Redirect to the edit page with the department_id
        exit;
    
    }

    // Update the department information in the database
    $query = "UPDATE gallery SET title='$title', photo='$update_photo_filename' WHERE id ='$id' ";

    $query_run = mysqli_query($conn, $query);

    if($query_run){
        // If new photo is uploaded, move it to the desired directory and delete the old one
        if($_FILES["photo"]["name"] !='' && $_FILES["photo"]["name"] != $old_photo){
            move_uploaded_file($_FILES["photo"]["tmp_name"], "gallery/".$_FILES["photo"]["name"]);
            unlink("gallery/". $old_photo);    
        }


        $_SESSION['status'] = "Image and PDF Updated Successfully";
        header('Location: view-gallery.php');
    } else {
        $_SESSION['status'] = "Image and PDF Not Updated Successfully";
        header('Location: view-gallery.php');
    }
}

// delete

if(isset($_POST['delete_gallery'])){
    $id = $_POST['delete_id'];
    $photo = $_POST['del_gallery'];
    // $pdf = $_POST['del_pdf'];

    $query = "DELETE FROM gallery WHERE id = '$id'";
    $query_run = mysqli_query($conn, $query);

    if($query_run){
        if(unlink("gallery/".$photo)) {
            $_SESSION['status'] = "Deleted Successfully";
            header('Location: view-gallery.php');
        } else {
            $_SESSION['status'] = "Error deleting files";
            header('Location: view-gallery.php');
        }
    } else {
        $_SESSION['status'] = "Not Deleted Successfully";
        header('Location: view-gallery.php');
    }
}
?>