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

public class Vimish : WebThingPlugin {
    WebThing wt;
    Gtk.Entry commandline;

    public override void Init(WebThing wt) {
        this.wt = wt;
        wt.Tabs.ShowTabs = false;

        wt.Window.KeyPressEvent += Window_KeyPress;

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

        commandline.Hide();

        ApplyOptions();
    }

    public override void InitWebView(WebView wv) {
        wv.KeyPressEvent += WebView_KeyPress;
    }

    public override void Deinit(WebThing wt) {
        SaveConfig();
    }

    private void Window_KeyPress(object o, KeyPressEventArgs e) {
        if ((Gdk.ModifierType.ControlMask & e.Event.State) != 0) {
            switch(e.Event.Key) {
            case Gdk.Key.n:
                wt.Tabs.NextPage();
                break;
            case Gdk.Key.p:
                wt.Tabs.PrevPage();
                break;
            }
        } else {
            switch(e.Event.Key) {
            case Gdk.Key.o:
                CommandStart("open ");
                break;
            case Gdk.Key.O:
                CommandStart("open " + wt.WebView.MainFrame.Uri);
                break;
            case Gdk.Key.t:
                CommandStart("tabopen ");
                break;
            case Gdk.Key.T:
                CommandStart("tabopen " + wt.WebView.MainFrame.Uri);
                break;
            case Gdk.Key.colon:
                CommandlineShow();
                break;
            }
        }
    }

    private void WebView_KeyPress(object o, KeyPressEventArgs e) {
        WebView wv = (WebView)o;

        Console.WriteLine(e.Event.Key);
        if (e.Event.State == Gdk.ModifierType.None) {
            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.r:
                wv.Reload();
                break;
            case Gdk.Key.Escape:
                wv.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 "close":
            wt.CloseTab();
            break;
        case "open":
            if (args.Length < 2) return;
            wt.OpenUri(args[1]);
            break;
        case "tabopen":
            if (args.Length < 2) return;
            wt.OpenUriTab(args[1]);
            wt.Tabs.CurrentPage = wt.Tabs.NPages - 1;
            break;
        case "n":
            wt.Tabs.NextPage();
            break;
        case "p":
            wt.Tabs.PrevPage();
            break;
        case "q":
            wt.Quit();
            break;
        case "set":
            if (args.Length == 2)
                Options[args[1]] = null;
            else
                Options[args[1]] = args[2];
            ApplyOptions();
            break;
        }
        CommandlineHide();
    }

    private void ApplyOptions() {
        foreach (string key in Options.Keys) {
            switch(key) {
            case "ShowTabs":
                bool v = ParseBool(Options[key]);
                wt.Tabs.ShowTabs = v;
                break;
            default:
                Error("No variable {0}", key);
                break;
            }
        }
    }

    private bool ParseBool(string v) {
        switch(v.ToLower()) {
        case "true":
        case "t":
        case "1":
        case "on":
        case "yes":
            return true;
        }
        return false;
    }

    private void Error(string format, params object[] values) {
        Console.WriteLine(format, values);
    }

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