using System;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Imaging;
using System.Windows.Threading;
using System.Xml.Serialization;
using Microsoft.Win32;

namespace MyApp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        ProgramData data = new ProgramData();
        string fileName = "";
        int currentlyPlaying = 0;
        bool progresBarDragging = false;
        EditWindow? editWindow = null;
        public DispatcherTimer timer = new DispatcherTimer();

        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = this;
            PlayListView.ItemsSource = data.PlayList;

            timer.Interval = TimeSpan.FromMinutes(1);
            timer.Tick += AutoUpdate;
        }

        private void AutoUpdate(object? sender, EventArgs e)
        {
            Save();
        }
        void Save()
        {
            if (fileName == "")
            {
                SaveFileDialog dialog = new SaveFileDialog();
                dialog.FileName = "Save";
                dialog.DefaultExt = "*.xml";
                dialog.Filter = "Data|*.xml";
                dialog.RestoreDirectory = true;

                if (dialog.ShowDialog() == true)
                {
                    fileName = dialog.FileName;
                }
            }

            if (fileName != "")
            {
                using (StreamWriter sw = new StreamWriter(fileName))
                {
                    XmlSerializer xml = new XmlSerializer(typeof(ProgramData));
                    xml.Serialize(sw, data);
                }
            }
            
        }
        void Load()
        {
            if (fileName == "") return;
            using (StreamReader sr = new StreamReader(fileName))
            {
                XmlSerializer xml = new XmlSerializer(typeof(ProgramData));

                if (xml.Deserialize(sr) is ProgramData m)
                {
                    data = m;
                    PlayListView.ItemsSource = data.PlayList;

                    if(data.AutoSave) timer.Start();
                    else timer.Stop();
                }
            }
        }
        void Window_Closing(object sender, CancelEventArgs e)
        {
            if(fileName == "")
            {
                MessageBoxResult result = MessageBox.Show("Data was not saved.\n Do you want to save it?", "Warning", MessageBoxButton.YesNo, MessageBoxImage.Warning);
                if (result == MessageBoxResult.Yes)
                {
                    //e.Cancel = true;
                    Save();
                }
            }
            else
            {
                Save();
            }
        }
        private void PlayButton_Click(object sender, RoutedEventArgs e)
        {
            if (!MediaPlayer.IsPlaying())
            {
                PlayPouseImg.Source = new BitmapImage(new Uri("pack://application:,,,/assets/pause_icon.png"));      
                MediaPlayer.Play();
            }
            else
            {
                PlayPouseImg.Source = new BitmapImage(new Uri("pack://application:,,,/assets/play_icon.png"));
                MediaPlayer.Pause();
            }
        }
        private void Stop_Click(object sender, RoutedEventArgs e)
        {
            MediaPlayer.Stop();
            ProgresBar.Value = 0;
            CurrentTime.Content = TimeSpan.FromSeconds(0).ToString(@"hh\:mm\:ss");
            PlayPouseImg.Source = new BitmapImage(new Uri("pack://application:,,,/assets/play_icon.png"));

        }
        private void Rewind_Click(object sender, RoutedEventArgs e)
        {
            data.PlayList[currentlyPlaying].IsPlaying = false;
            currentlyPlaying--;
            if (currentlyPlaying < 0)
            {
                currentlyPlaying = 0;
            }
            MediaPlayer.ChangeContent(data.PlayList[currentlyPlaying].FilePath);
            data.PlayList[currentlyPlaying].IsPlaying = true;
        }
        private void Forward_Click(object sender, RoutedEventArgs e)
        {
            data.PlayList[currentlyPlaying].IsPlaying = false;
            currentlyPlaying++;
            if (currentlyPlaying >= data.PlayList.Count)
            {
                currentlyPlaying = data.PlayList.Count - 1;
            }
            MediaPlayer.ChangeContent(data.PlayList[currentlyPlaying].FilePath);
            data.PlayList[currentlyPlaying].IsPlaying = true;
        }
        private void ProgresBar_DragCompleted(object sender, System.Windows.Controls.Primitives.DragCompletedEventArgs e)
        {
            progresBarDragging = false;
            MediaPlayer.ChangeTime(ProgresBar.Value);
        }
        private void ProgresBar_DragStarted(object sender, System.Windows.Controls.Primitives.DragStartedEventArgs e)
        {
            progresBarDragging = true;
        }
        private void PlayListView_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            if (PlayListView.SelectedItem is Media m)
            {
                data.PlayList[currentlyPlaying].IsPlaying = false;
                m.IsPlaying = true;
                MediaPlayer.ChangeContent(m.FilePath);
                MediaPlayer.Play();
                PlayPouseImg.Source = new BitmapImage(new Uri("pack://application:,,,/assets/pause_icon.png"));
                currentlyPlaying = PlayListView.SelectedIndex;
            }
        }
        private void PlayListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (PlayListView.SelectedItem is Media m)
            {
                data.SelectedItem = m;
                if (editWindow != null)
                {
                    if (data.SelectedItem == null) { editWindow.Close(); }
                    else { editWindow.DataContext = data.SelectedItem; }
                }
            }
        }
        private void MenuItem_Exit_Click(object sender, RoutedEventArgs e)
        {
            Application.Current.Shutdown();
        }
        private void MenuItem_Add_Click(object sender, RoutedEventArgs e)
        {
            var dialog = new OpenFileDialog();
            //dialog.FileName = "Document"; // Default file name
            dialog.DefaultExt = "*.*"; // Default file extension
            dialog.Filter = "All files|*.*|Video media|*.mkv;*.wmv;*.mp4"; // Filter files by extension
            dialog.Multiselect = true;

            bool? result = dialog.ShowDialog();
            if (result == true)
            {
                
                string[] files = dialog.FileNames;
                foreach(string file in files)
                {
                    string filename = file.Split("\\").Last();
                    data.PlayList.Add(new Media(filename, file));
                }
                
            }
        }
        private void MenuItem_Remove_Click(object sender, RoutedEventArgs e)
        {
            if(PlayListView.SelectedItem is Media m)
            {
                if(editWindow != null) { editWindow.Close(); }
                data.PlayList.Remove(m);
            }
            else
            {
                MessageBox.Show("Nothing was selected");
            }
         
        }
        private void MenuItem_Settings_Click(object sender, RoutedEventArgs e)
        {
            SettingsWindow? settingsWindow =  new SettingsWindow(data);
            settingsWindow.Owner = this;
            settingsWindow.ShowDialog();

        }
        private void MenuItem_Save_Click(object sender, RoutedEventArgs e)
        {
            Save();
        }
        private void MenuItem_Edit_Click(object sender, RoutedEventArgs e)
        {
            if(!(PlayListView.SelectedItem is Media)) return;
            if(editWindow == null)
            {
                editWindow = new EditWindow(data);
                editWindow.Owner = this;
                editWindow.Show();
            }
            if (!editWindow.IsLoaded)
            {
                editWindow = new EditWindow(data);
                editWindow.Owner = this;
                editWindow.Show();
            }
        }
        private void MenuItem_Load_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.FileName = "Save"; // Default file name
            dialog.DefaultExt = "*.xml"; // Default file extension
            dialog.Filter = "Data|*.xml"; // Filter files by extension
            
            bool? result = dialog.ShowDialog();
            if (result == true)
            {
                fileName = dialog.FileName;
                Load();
            }
        }
        private void MediaPlayer_OnTimeChage(object sender, double time)
        {
            if (!progresBarDragging)
            {
                ProgresBar.Value = time;
                CurrentTime.Content = TimeSpan.FromSeconds(time).ToString(@"hh\:mm\:ss");
            }
        }
        private void MediaPlayer_OnMediaLoad(object sender, bool loded, double totalTimeInMilS)
        {
            if (loded)
            {
                ProgresBar.Minimum = 0;
                ProgresBar.Maximum = totalTimeInMilS;
                TotalTime.Content = TimeSpan.FromSeconds(totalTimeInMilS).ToString(@"hh\:mm\:ss");
            }
            else
            {
                PlayPouseImg.Source = new BitmapImage(new Uri("pack://application:,,,/assets/play_icon.png"));
            }
        }
    }
}