using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Xml;
using System.Windows;
using System.Windows.Threading;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using ICSharpCode.AvalonEdit.CodeCompletion;
using ICSharpCode.AvalonEdit.Folding;
using ICSharpCode.AvalonEdit.Highlighting;
using Microsoft.Win32;
using System.Resources;
using System.Threading.Tasks;
using System.Windows.Controls.WpfPropertyGrid;
using Microsoft.Scripting;
using Microsoft.Scripting.Hosting;
using PythonConsoleControl;

namespace IronPythonConsole
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class PythonConsoleWindow : UserControl
    {
        public event EventHandler<EventArgs> ConsoleInitialized;

        ConsoleOptions consoleOptionsProvider;
        
        public PythonConsoleWindow()
		{
            Initialized += new EventHandler(MainWindow_Initialized);
            // Load our custom highlighting definition:
            IHighlightingDefinition pythonHighlighting;
            using (Stream s = typeof(PythonConsoleWindow).Assembly.GetManifestResourceStream("IronPythonConsole.Resources.Python.xshd"))
            {
                if (s == null)
                    throw new InvalidOperationException("Could not find embedded resource");
                using (XmlReader reader = new XmlTextReader(s))
                {
                    pythonHighlighting = ICSharpCode.AvalonEdit.Highlighting.Xshd.
                        HighlightingLoader.Load(reader, HighlightingManager.Instance);
                }
            }
            // and register it in the HighlightingManager
            HighlightingManager.Instance.RegisterHighlighting("Python Highlighting", new string[] { ".cool" }, pythonHighlighting);
            	
			InitializeComponent();

            textEditor.SyntaxHighlighting = pythonHighlighting;

            textEditor.PreviewKeyDown += new KeyEventHandler(textEditor_PreviewKeyDown);

            consoleOptionsProvider = new ConsoleOptions(console.Pad);

            propertyGridComboBox.SelectedIndex = 0;

            expander.Expanded += new RoutedEventHandler(expander_Expanded);

            console.Pad.Host.ConsoleCreated +=new PythonConsoleControl.ConsoleCreatedEventHandler(Host_ConsoleCreated);
		}

        public ScriptScope PythonScope
        {
            get { return console.Pad.Console.ScriptScope; }
        }

        public PythonConsole PythonConsole
        {
            get { return console.Pad.Console;  }
        }

        public PythonConsolePad ConsolePad
        {
            get { return console.Pad; }
        }

        public IronPythonConsoleControl PythonConsoleControl
        {
            get { return console; }
        }

		string currentFileName;

        void Host_ConsoleCreated(object sender, EventArgs e)
        {
            console.Pad.Console.ConsoleInitialized += new PythonConsoleControl.ConsoleInitializedEventHandler(Console_ConsoleInitialized);
        }

        void Console_ConsoleInitialized(object sender, EventArgs e)
        {
            if (ConsoleInitialized != null)
                ConsoleInitialized(this, new EventArgs());

            console.Pad.Console.ScriptStarting += ConsoleOnScriptStarting;
            console.Pad.Console.ScriptFinished += ConsoleOnScriptFinished;

            string startupScipt = "import IronPythonConsole";
            ScriptSource scriptSource = console.Pad.Console.ScriptScope.Engine.CreateScriptSourceFromString(startupScipt, SourceCodeKind.Statements);
            try
            {
                scriptSource.Execute();
            }
            catch {}
            //double[] test = new double[] { 1.2, 4.6 };
            //console.Pad.Console.ScriptScope.SetVariable("test", test);
        }

        private void ConsoleOnScriptFinished(object sender, EventArgs eventArgs)
        {
            Dispatcher.Invoke(new Action(() =>
                    {
                        btnRun.IsEnabled = true;
                        btnStop.IsEnabled = false;
                    }));
        }

        private void ConsoleOnScriptStarting(object sender, EventArgs eventArgs)
        {
            Dispatcher.Invoke(new Action(() =>
            {
                btnRun.IsEnabled = false;
                btnStop.IsEnabled = true;
            }));
        }

        void MainWindow_Initialized(object sender, EventArgs e)
        {
            //propertyGridComboBox.SelectedIndex = 1;
        }
		
		void openFileClick(object sender, RoutedEventArgs e)
		{
		    OpenFileDialog dlg = new OpenFileDialog {CheckFileExists = true, DefaultExt = ".py", Filter = "Python Script File|*.py|Plain Text|*.txt|All Files|*.*", FilterIndex = 0 };
		    if (dlg.ShowDialog() ?? false) {
				currentFileName = dlg.FileName;
				textEditor.Load(currentFileName);
				//textEditor.SyntaxHighlighting = HighlightingManager.Instance.GetDefinitionByExtension(Path.GetExtension(currentFileName));
			}
		}
		
		void saveFileClick(object sender, EventArgs e)
		{
			if (currentFileName == null) {
			    SaveFileDialog dlg = new SaveFileDialog {DefaultExt = ".py", Filter = "Python Script File|*.py|Plain Text|*.txt|All Files|*.*", FilterIndex = 0};
			    if (dlg.ShowDialog() ?? false) {
					currentFileName = dlg.FileName;
				} else {
					return;
				}
			}
			textEditor.Save(currentFileName);
		}

        void runClick(object sender, EventArgs e)
        {
            RunStatements();
        }

        void textEditor_PreviewKeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.F5) RunStatements();
        }

        void RunStatements()
        {
            string statementsToRun = "";
            if (textEditor.TextArea.Selection.Length > 0)
                statementsToRun = textEditor.TextArea.Selection.GetText();
            else
                statementsToRun = textEditor.TextArea.Document.Text;
            console.Pad.Console.RunStatements(statementsToRun);
        }
		
		void propertyGridComboBoxSelectionChanged(object sender, RoutedEventArgs e)
		{
            if (propertyGrid == null)
				return;
			switch (propertyGridComboBox.SelectedIndex) {
				case 0:
                    propertyGrid.SelectedObject = consoleOptionsProvider; // not .Instance
					break;
				case 1:
					//propertyGrid.SelectedObject = textEditor.Options; (for WPF native control)
                    propertyGrid.SelectedObject = textEditor.Options;
					break;
			}
		}

        void expander_Expanded(object sender, RoutedEventArgs e)
        {
            propertyGridComboBoxSelectionChanged(sender, e);
        }

        private void stopClick(object sender, RoutedEventArgs e)
        {
            Task.Factory.StartNew(() => console.Pad.Console.AbortRunningScript());
        }
    }
}