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

namespace PDFPatcher.Functions
{
	[ToolboxItem(false)]
	public partial class AppOptionForm : Form, IResettableControl
	{
		bool locked;

		public AppOptionForm() {
			InitializeComponent();
			Reload();
			this.SetIcon(Properties.Resources.AppOptions);
			_BookmarkEncodingBox.SelectedIndexChanged += ControlChanged;
			_DocInfoEncodingBox.SelectedIndexChanged += ControlChanged;
			_TextEncodingBox.SelectedIndexChanged += ControlChanged;
			_FontNameEncodingBox.SelectedIndexChanged += ControlChanged;
			_SaveAppSettingsBox.CheckedChanged += ControlChanged;
			_LoadEntireFileBox.CheckedChanged += ControlChanged;
			_DefaultOverwritePdfFileBox.CheckedChanged += ControlChanged;
			_AddContextMenuBox.CheckedChanged += ControlChanged;
		}

		public void Reset() {
			AppContext.SaveAppSettings = true;
			AppContext.LoadPartialPdfFile = false;
			AppContext.Encodings = new EncodingOptions();
			Reload();
		}

		public void Reload() {
			locked = true;
			_SaveAppSettingsBox.Checked = AppContext.SaveAppSettings;
			_LoadPartialFileBox.Checked = AppContext.LoadPartialPdfFile;
			_LoadEntireFileBox.Checked = !AppContext.LoadPartialPdfFile;
			_DefaultOverwritePdfFileBox.Checked = AppContext.Editor.DefaultOverwriteDocument;
			_AddContextMenuBox.Checked = ShellHelper.CheckPdfOpenWithAssociation();

			InitEncodingList(_BookmarkEncodingBox, AppContext.Encodings.BookmarkEncodingName);
			InitEncodingList(_DocInfoEncodingBox, AppContext.Encodings.DocInfoEncodingName);
			InitEncodingList(_TextEncodingBox, AppContext.Encodings.TextEncodingName);
			InitEncodingList(_FontNameEncodingBox, AppContext.Encodings.FontNameEncodingName);

			locked = false;
		}

		static void InitEncodingList(ComboBox list, string encodingName) {
			list.Items.Clear();
			foreach (var item in Constants.Encoding.EncodingNames) {
				list.Items.Add(item);
				if (encodingName == item) {
					list.SelectedIndex = list.Items.Count - 1;
				}
			}
			if (list.SelectedIndex == -1) {
				list.SelectedIndex = 0;
			}
		}

		void ControlChanged(object sender, EventArgs e) {
			if (locked) {
				return;
			}

			if (sender == _DocInfoEncodingBox) {
				AppContext.Encodings.DocInfoEncodingName = _DocInfoEncodingBox.SelectedItem.ToString();
			}
			else if (sender == _BookmarkEncodingBox) {
				AppContext.Encodings.BookmarkEncodingName = _BookmarkEncodingBox.SelectedItem.ToString();
			}
			else if (sender == _TextEncodingBox) {
				AppContext.Encodings.TextEncodingName = _TextEncodingBox.SelectedItem.ToString();
			}
			else if (sender == _FontNameEncodingBox) {
				AppContext.Encodings.FontNameEncodingName = _FontNameEncodingBox.SelectedItem.ToString();
			}
			else if (sender == _SaveAppSettingsBox) {
				AppContext.SaveAppSettings = _SaveAppSettingsBox.Checked;
			}
			else if (sender == _LoadEntireFileBox) {
				AppContext.LoadPartialPdfFile = _LoadPartialFileBox.Checked;
			}
			else if (sender == _DefaultOverwritePdfFileBox) {
				AppContext.Editor.DefaultOverwriteDocument = _DefaultOverwritePdfFileBox.Checked;
			}
			else if (sender == _AddContextMenuBox) {
				if (_AddContextMenuBox.Checked) {
					ShellHelper.AddPdfOpenWithAssociation();
				}
				else {
					ShellHelper.RemovePdfOpenWithAssociation();
				}
			}
		}

		void _CreateShortcutButton_Click(object sender, EventArgs e) {
			ShellHelper.CreateShortcut();
		}
	}
}