using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Forms;
using ComPDFKit.PDFDocument;

namespace Compdfkit_Tools.PDFControl
{
    public partial class EncryptionDialog : Window, INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        public bool CanEncrypt => FileListControl.FileNum > 0 && SetEncryptionControl.ValidSetting;

        private CPDFDocument document;
        public EncryptionDialog()
        {
            InitializeComponent();
            DataContext = this;
            FileListControl.FileNumChanged += (sender, args) =>
            {
                OnPropertyChanged(nameof(CanEncrypt));
            };
            SetEncryptionControl.EncryptionSettingChanged += (sender, args) =>
            {
                OnPropertyChanged(nameof(CanEncrypt));
            };
        }

        private void ButtonCancel_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }

        private void ButtonEncrypt_Click(object sender, RoutedEventArgs e)
        {
            var dialog = new FolderBrowserDialog();
            dialog.ShowDialog();
            var savePath = dialog.SelectedPath;
            var permissionsInfo = new CPDFPermissionsInfo();

            if (!SetEncryptionControl.IsOwnerPasswordEnabled || string.IsNullOrEmpty(SetEncryptionControl.OwnerPassword))
            {
                foreach (var fileInfoData in FileListControl.FileInfoDataList)
                {
                    document = CPDFDocument.InitWithFilePath(fileInfoData.Location);
                    document.Encrypt(SetEncryptionControl.UserPassword, null, permissionsInfo);
                    document.WriteToFilePath(savePath + Path.DirectorySeparatorChar + Path.GetFileNameWithoutExtension(fileInfoData.FileName) + "_Encrypted.pdf");
                }
            }
            else
            {
                permissionsInfo.AllowsPrinting = SetEncryptionControl.IsAllowPrint;
                permissionsInfo.AllowsCopying = SetEncryptionControl.IsAllowCopy;
                foreach (var fileInfoData in FileListControl.FileInfoDataList)
                {
                    document = CPDFDocument.InitWithFilePath(fileInfoData.Location);
                    document.Encrypt(SetEncryptionControl.UserPassword, SetEncryptionControl.OwnerPassword, permissionsInfo);
                    document.WriteToFilePath(savePath + Path.DirectorySeparatorChar + Path.GetFileNameWithoutExtension(fileInfoData.FileName) + "_Encrypted.pdf");
                }
            }
        }

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}