using System;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;
using PDFPatcher.Common;

namespace PDFPatcher
{
	public partial class TargetFileControl : UserControl
	{
		internal event CancelEventHandler TargetFileChangedByBrowseButton;
		internal event EventHandler<EventArgs> BrowseForFile;

		public TargetFileControl() {
			InitializeComponent();

			_FileMacroMenu.ItemClicked += _FileMacroMenu.ProcessInsertMacroCommand;
		}

		///<summary>获取或指定书签文件路径的值。</summary>
		internal HistoryComboBox FileList => _TargetPdfBox;
		internal FileDialog FileDialog => _SavePdfBox;
		internal Functions.MacroMenu FileMacroMenu => _FileMacroMenu;

		public string BrowseTargetFile() {
			_BrowseTargetPdfButton_Click(_BrowseTargetPdfButton, null);
			return _TargetPdfBox.Text;
		}

		/// <summary>
		/// 获取或设置文件下拉框的文本。
		/// </summary>
		public override string Text {
			get => _TargetPdfBox.Text;
			set => _TargetPdfBox.Text = value;
		}

		/// <summary>
		/// 获取或设置文件下拉框前的标签文本。
		/// </summary>
		[DefaultValue("输出 PD&F 文件：")]
		public string Label {
			get => label1.Text;
			set => label1.Text = value;
		}

		void _BrowseTargetPdfButton_Click(object sender, EventArgs e) {
			BrowseForFile?.Invoke(sender, e);
			FilePath sourceFile = (AppContext.SourceFiles != null && AppContext.SourceFiles.Length > 0) ? AppContext.SourceFiles[0] : String.Empty;
			var t = _TargetPdfBox.Text;
			if (t.Length > 0 && FileHelper.IsPathValid(t) && Path.GetFileName(t).Length > 0) {
				_SavePdfBox.SetLocation(t);
			}
			else if (sourceFile.FileName.Length > 0) {
				t = FileHelper.GetNewFileNameFromSourceFile(sourceFile, Constants.FileExtensions.Pdf);
				_SavePdfBox.SetLocation(t);
			}
			if (_SavePdfBox.ShowDialog() == DialogResult.OK) {
				if (TargetFileChangedByBrowseButton != null) {
					var a = new CancelEventArgs();
					TargetFileChangedByBrowseButton(this, a);
					if (a.Cancel) {
						return;
					}
				}
				Text = _SavePdfBox.FileName;
			}
		}

		void _TargetPdfBox_TextChanged(object sender, EventArgs e) {
			AppContext.TargetFile = _TargetPdfBox.Text;
		}

		void _TargetPdfBox_DragEnter(object sender, DragEventArgs e) {
			FormHelper.FeedbackDragFileOver(e, Constants.FileExtensions.Pdf);
		}

		void _TargetPdfBox_DragDrop(object sender, DragEventArgs e) {
			FormHelper.DropFileOver((Control)sender, e, Constants.FileExtensions.Pdf);
		}

		void TargetFileControl_Show(object sender, EventArgs e) {
			var t = Text;
			if (Visible && AppContext.MainForm != null) {
				_TargetPdfBox.Contents = AppContext.Recent.TargetPdfFiles;
			}
			else if (Visible == false) {
				_TargetPdfBox.Contents = null;
			}
			Text = t;
		}

	}
}