using System;
using System.Text.RegularExpressions;
using Gtk;
using bytex64.WebThing;

public class Plugin {
    WebThing wt;
    Gtk.Entry commandline;

    public Plugin(WebThing wt) {
        this.wt = wt;
        wt.WebView.KeyPressEvent += WebView_KeyPress;

        commandline = new Gtk.Entry();
        commandline.Activated += command_Activate;
        commandline.KeyPressEvent += command_KeyPress;
        wt.AttachWidget(commandline, CompassDirection.S, AttachOptions.Fill, AttachOptions.Shrink);

        commandline.Hide();
    }

    private void WebView_KeyPress(object o, KeyPressEventArgs e) {
        Console.WriteLine(e.Event.Key);
        switch(e.Event.Key) {
        case Gdk.Key.j:
            wt.ScrolledWindow.Vadjustment.Value += wt.ScrolledWindow.Vadjustment.StepIncrement;
            break;
        case Gdk.Key.k:
            wt.ScrolledWindow.Vadjustment.Value -= wt.ScrolledWindow.Vadjustment.StepIncrement;
            break;
        case Gdk.Key.l:
            wt.ScrolledWindow.Hadjustment.Value += wt.ScrolledWindow.Hadjustment.StepIncrement;
            break;
        case Gdk.Key.h:
            wt.ScrolledWindow.Hadjustment.Value -= wt.ScrolledWindow.Hadjustment.StepIncrement;
            break;
        case Gdk.Key.o:
            CommandStart("open ");
            break;
        case Gdk.Key.r:
            wt.WebView.Reload();
            break;
        case Gdk.Key.t:
            CommandStart("tabopen ");
            break;
        case Gdk.Key.colon:
            CommandlineShow();
            break;
        case Gdk.Key.Escape:
            wt.WebView.ExecuteScript("document.activeElement.blur()");
            break;
        }
    }

    public void CommandStart(string text) {
        commandline.Text = text;
        commandline.GrabFocus();
        commandline.Position = text.Length;
        commandline.Show();
    }

    public void CommandlineShow() {
        commandline.Show();
        commandline.GrabFocus();
    }

    public void CommandlineHide() {
        commandline.Hide();
        wt.WebView.GrabFocus();
    }

    private void command_Activate(object o, EventArgs e) {
        string[] args = Regex.Split(commandline.Text, @"\s+");
        switch(args[0]) {
        case "open":
            if (args.Length < 2) return;
            wt.OpenUri(args[1]);
            break;
        case "q":
            wt.Quit();
            break;
        }
        CommandlineHide();
    }

    private void command_KeyPress(object o, KeyPressEventArgs e) {
        if (e.Event.Key == Gdk.Key.Escape)
            CommandlineHide();
    }
}