using System;
using Gtk;

public partial class MainWindow: Gtk.Window
{
    // Set up some consts
    string appVersion = "0.0.2";



    public MainWindow (): base (Gtk.WindowType.Toplevel)
    {
        Build ();
    }

    protected void OnDeleteEvent (object sender, DeleteEventArgs a)
    {
        Application.Quit ();
        a.RetVal = true;
    }

    void ShowLicenseFromChooser()
    {
        string filename = GetLicenseFileFromChooser();
        if (!string.IsNullOrEmpty (filename))
        {
            ShowLicenseFromFile(filename);
        }
    }

    string GetLicenseFileFromChooser()
    {
        FileChooserDialog chooser = new FileChooserDialog(
            "Please select a logfile to view...",
            this,
            FileChooserAction.Open,
            "Cancel", ResponseType.Cancel,
            "Open", ResponseType.Accept );

        var chooserResult = chooser.Run ();
        string result;

        if (chooserResult == (int)ResponseType.Accept)
            result = chooser.Filename;
        else
            result = null;

        chooser.Destroy ();
        return result;
    }

    void ShowLicenseFromFile(string filename)
    {
        System.IO.StreamReader file =
            System.IO.File.OpenText(filename);

        licenseTextView.Buffer.Text = file.ReadToEnd ();

        UpdateTitle (filename);

        file.Close ();
    }

    void ResetWindow()
    {
        int width, height;
        this.GetDefaultSize (out width, out height);
        this.Resize (width, height);
    }

    void ClearTextBox()
    {
        licenseTextView.Buffer.Text = "";
    }

    void UpdateTitle(string title)
    {
        if (!string.IsNullOrEmpty(title))
            this.Title = "License Viewer -- " + title;
        else
            this.Title = "License Viewer";

    }

    protected void OnOpen (object sender, System.EventArgs e)
    {
        ShowLicenseFromChooser();
    }

    protected void OnClose (object sender, System.EventArgs e)
    {
        ResetWindow ();
        ClearTextBox ();
        UpdateTitle (null);
    }

    protected void OnExit (object sender, System.EventArgs e)
    {
        Application.Quit ();
    }

    protected void OnAbout (object sender, System.EventArgs e)
    {
        // Create a nuew About dialog
        AboutDialog about = new AboutDialog();

        // Change the dialog's properties to the appropriate values
        about.Name = "Philip Korsika's License Viewer";
        about.Version = appVersion;

        // Show the dialog and pass it control
        about.Run ();

        // Destroy the dialog
        about.Destroy();
    }
}