using System;
using System.Windows.Forms;

using BizHawk.Client.Common;
using BizHawk.Client.EmuHawk.WinFormExtensions;
using System.IO;

namespace BizHawk.Client.EmuHawk
{
	public partial class MultiDiskFileSelector : UserControl
	{
		public string SystemString = "";

		public string GetName()
		{
			return PathBox.Text;
		}

		public void SetName(string val)
		{
			PathBox.Text = val;
		}

		public event EventHandler NameChanged;

		private void HandleLabelTextChanged(object sender, EventArgs e)
		{
			this.OnNameChanged(EventArgs.Empty);
		}

		public MultiDiskFileSelector()
		{
			InitializeComponent();
			PathBox.TextChanged += this.HandleLabelTextChanged;
		}

		protected virtual void OnNameChanged(EventArgs e)
		{
			EventHandler handler = this.NameChanged;
			if (handler != null)
			{
				handler(this, e);
			}
		}

		private void PathBox_DragEnter(object sender, DragEventArgs e)
		{
			if (e.Data.GetDataPresent(DataFormats.FileDrop) &&
				((string[])e.Data.GetData(DataFormats.FileDrop)).Length == 1)
			{
				e.Effect = DragDropEffects.Copy;
			}
			else
			{
				e.Effect = DragDropEffects.None;
			}
		}

		private void PathBox_DragDrop(object sender, DragEventArgs e)
		{
			if (e.Data.GetDataPresent(DataFormats.FileDrop))
			{
				var ff = (string[])e.Data.GetData(DataFormats.FileDrop);
				if (ff.Length == 1)
				{
					PathBox.Text = ff[0];
				}
			}
		}

		private void BrowseButton_Click(object sender, EventArgs e)
		{
			using var ofd = new OpenFileDialog
			{
				InitialDirectory = PathManager.MakeAbsolutePath(Global.Config.PathEntries["Global_NULL", "ROM"].Path, "Global_NULL"),
				Filter = MainForm.RomFilter,
				RestoreDirectory = true
			};
			string _path = "";

			var result = ofd.ShowHawkDialog();
			if (result == DialogResult.OK)
			{
				_path = ofd.FileName;
			}
			else
			{
				return;
			}

			try
			{
				var file = new FileInfo(ofd.FileName);
				var path = BizHawk.Common.HawkFile.Util_ResolveLink(file.FullName);

				using (var hf = new BizHawk.Common.HawkFile(path))
				{
					if (hf.IsArchive)
					{
						// archive - run the archive chooser
						if (SystemString == "PSX" || SystemString == "PCFX" || SystemString == "SAT")
						{
							MessageBox.Show("Using archives with PSX, PCFX or SATURN is not currently recommended/supported.");
							return;
						}

						using var ac = new ArchiveChooser(new BizHawk.Common.HawkFile(_path));
						int memIdx = -1;

						if (ac.ShowDialog(this) == DialogResult.OK)
						{
							memIdx = ac.SelectedMemberIndex;
						}

						var intName = hf.ArchiveItems[memIdx];
						PathBox.Text = $"{_path}|{intName.Name}";
					}
					else
					{
						// file is not an archive
						PathBox.Text = _path;
					}
				}
			}
			catch
			{
				return;
			}
		}

		private void UseCurrentRomButton_Click(object sender, EventArgs e)
		{
			PathBox.Text = GlobalWin.MainForm.CurrentlyOpenRom;
		}

		private void DualGBFileSelector_Load(object sender, EventArgs e)
		{
			UpdateValues();
		}

		public void NewUpdate(ToolFormUpdateType type) { }

		public void UpdateValues()
		{
			UseCurrentRomButton.Enabled =
				!string.IsNullOrEmpty(GlobalWin.MainForm.CurrentlyOpenRom)
				&& !GlobalWin.MainForm.CurrentlyOpenRom.Contains(".xml"); // Can't already be an xml
		}

		private void PathBox_TextChanged(object sender, EventArgs e)
		{
			OnNameChanged(e);
		}
	}
}