#region ================== Namespaces

using System;
using System.ComponentModel;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using CodeImp.DoomBuilder.Config;
using CodeImp.DoomBuilder.GZBuilder.Data;
using CodeImp.DoomBuilder.Geometry;
using CodeImp.DoomBuilder.Map;
using CodeImp.DoomBuilder.Types;
using CodeImp.DoomBuilder.GZBuilder;

#endregion

namespace CodeImp.DoomBuilder.Controls
{
	public partial class ArgumentsControl : UserControl
	{
		#region ================== Native stuff

		[DllImport("user32.dll")]
		private static extern int SendMessage(IntPtr hWnd, Int32 wMsg, bool wParam, Int32 lParam);
		
		private const int WM_SETREDRAW = 11;

		#endregion

		#region ================== Enums

		private enum ArgZeroMode
		{
			DEFAULT,
			INT,
			STRING,
		}

		#endregion

		#region ================== Variables

		private string arg0strval;
		private bool havearg0str;
		private int action;
		private ArgumentInfo[] arginfo;
		private ArgZeroMode argzeromode;
        private ArgZeroMode Arg0Mode
        {
            get { return argzeromode; }
            set
            {
                arg0label.Text = (value == ArgZeroMode.STRING ? arginfo[0].TitleStr : arginfo[0].Title) + ":";
                argzeromode = value;
            }
        }

		#endregion

		#region ================== Constructor

		public ArgumentsControl()
		{
			InitializeComponent();

            Reset();
		}

        #endregion

        #region ================== Setup

        public void Reset()
        {
            // Only when running (this.DesignMode won't do when not this, but one of parent controls is in design mode)
            if (LicenseManager.UsageMode != LicenseUsageMode.Designtime)
            {
                // do nothing.
            }
        }

		public void SetValue(Linedef l, bool first)
		{
			SetValue(l.Fields, l.Args, first);
		}

		public void SetValue(Thing t, bool first)
		{
			SetValue(t.Fields, t.Args, first);
		}

		private void SetValue(UniFields fields, int[] args, bool first)
		{
			if(first)
			{
				if(General.Map.UDMF)
				{
					arg0strval = fields.GetValue("arg0str", string.Empty);
					havearg0str = !string.IsNullOrEmpty(arg0strval);
				}

				// Update arguments
				arg0.SetValue(args[0]);
				arg1.SetValue(args[1]);
				arg2.SetValue(args[2]);
				arg3.SetValue(args[3]);
				arg4.SetValue(args[4]);
			}
			else
			{
				if(General.Map.UDMF)
				{
					if(arg0strval != fields.GetValue("arg0str", string.Empty))
					{
						havearg0str = true;
                        arg0strval = string.Empty;
					}
				}

				// Update arguments
				if(!string.IsNullOrEmpty(arg0.Text) && args[0] != arg0.GetResult(int.MinValue)) arg0.ClearValue();
				if(!string.IsNullOrEmpty(arg1.Text) && args[1] != arg1.GetResult(int.MinValue)) arg1.ClearValue();
				if(!string.IsNullOrEmpty(arg2.Text) && args[2] != arg2.GetResult(int.MinValue)) arg2.ClearValue();
				if(!string.IsNullOrEmpty(arg3.Text) && args[3] != arg3.GetResult(int.MinValue)) arg3.ClearValue();
				if(!string.IsNullOrEmpty(arg4.Text) && args[4] != arg4.GetResult(int.MinValue)) arg4.ClearValue();
			}
		}

		#endregion

		#region ================== Apply

		public void Apply(Linedef l, int step)
		{
            //mxd. Script name/number handling
            // We can't rely on control visibility here, because all controlls will be invisible if ArgumentsControl is invisible
            // (for example, when a different tab is selected)
            bool isacs = (Array.IndexOf(GZGeneral.ACS_SPECIALS, action) != -1);
			switch(Arg0Mode)
			{
				// Apply arg0str
				case ArgZeroMode.STRING:
                    if (isacs)
                    {
                        if (!string.IsNullOrEmpty(arg0named.Text))
                            l.Fields["arg0str"] = new UniValue(UniversalType.String, arg0named.Text);
                    }
                    else
                    {
                        if (!string.IsNullOrEmpty(arg0str.Text))
                            l.Fields["arg0str"] = new UniValue(UniversalType.String, arg0str.Text);
                    }
					break;

				// Apply script number
				case ArgZeroMode.INT:
                    if (!isacs)
                        goto case ArgZeroMode.DEFAULT;
                    //
					if(!string.IsNullOrEmpty(arg0int.Text))
					{
						if(arg0int.SelectedItem != null)
							l.Args[0] = ((ScriptItem)((ColoredComboBoxItem)arg0int.SelectedItem).Value).Index;
						else if(!int.TryParse(arg0int.Text.Trim(), out l.Args[0]))
							l.Args[0] = 0;

						if(l.Fields.ContainsKey("arg0str")) l.Fields.Remove("arg0str");
					}
					break;

				// Apply classic arg
				case ArgZeroMode.DEFAULT:
					l.Args[0] = arg0.GetResult(l.Args[0], step);
					if(l.Fields.ContainsKey("arg0str")) l.Fields.Remove("arg0str");
					break;

				default: throw new NotImplementedException("Unknown ArgZeroMode");
			}

			// Apply the rest of args
			l.Args[1] = arg1.GetResult(l.Args[1], step);
			l.Args[2] = arg2.GetResult(l.Args[2], step);
			l.Args[3] = arg3.GetResult(l.Args[3], step);
			l.Args[4] = arg4.GetResult(l.Args[4], step);
		}

		public void Apply(Thing t, int step)
		{
            //mxd. Script name/number handling
            // We can't rely on control visibility here, because all controlls will be invisible if ArgumentsControl is invisible
            // (for example, when a different tab is selected)
            bool isacs = (Array.IndexOf(GZGeneral.ACS_SPECIALS, action) != -1);
            switch (Arg0Mode)
            {
                // Apply arg0str
                case ArgZeroMode.STRING:
                    if (isacs)
                    {
                        if (!string.IsNullOrEmpty(arg0named.Text))
                            t.Fields["arg0str"] = new UniValue(UniversalType.String, arg0named.Text);
                    }
                    else
                    {
                        if (!string.IsNullOrEmpty(arg0str.Text))
                            t.Fields["arg0str"] = new UniValue(UniversalType.String, arg0str.Text);
                    }
                    break;

                // Apply script number
                case ArgZeroMode.INT:
                    if (!isacs)
                        goto case ArgZeroMode.DEFAULT;
                    //
                    if (!string.IsNullOrEmpty(arg0int.Text))
                    {
                        if (arg0int.SelectedItem != null)
                            t.Args[0] = ((ScriptItem)((ColoredComboBoxItem)arg0int.SelectedItem).Value).Index;
                        else if (!int.TryParse(arg0int.Text.Trim(), out t.Args[0]))
                            t.Args[0] = 0;

                        if (t.Fields.ContainsKey("arg0str")) t.Fields.Remove("arg0str");
                    }
                    break;

                // Apply classic arg
                case ArgZeroMode.DEFAULT:
                    t.Args[0] = arg0.GetResult(t.Args[0], step);
                    if (t.Fields.ContainsKey("arg0str")) t.Fields.Remove("arg0str");
                    break;

                default: throw new NotImplementedException("Unknown ArgZeroMode");
            }

            // Apply the rest of args
            t.Args[1] = arg1.GetResult(t.Args[1], step);
			t.Args[2] = arg2.GetResult(t.Args[2], step);
			t.Args[3] = arg3.GetResult(t.Args[3], step);
			t.Args[4] = arg4.GetResult(t.Args[4], step);
		}

		#endregion

		#region ================== Update

		public void UpdateAction(int action, bool setuponly)
		{
			UpdateAction(action, setuponly, null);
		}

		public void UpdateAction(int action, bool setuponly, ThingTypeInfo info)
		{
			// Update arguments
			int showaction = 0;
			ArgumentInfo[] oldarginfo = (arginfo != null ? (ArgumentInfo[])arginfo.Clone() : null); //mxd

			// Only when action type is known
			if(General.Map.Config.LinedefActions.ContainsKey(action)) showaction = action;
			
			// Update argument infos
			if((showaction == 0) && (info != null)) arginfo = info.Args;
			else arginfo = General.Map.Config.LinedefActions[showaction].Args;

			// Don't update action args when thing type is changed
			if(info != null && showaction != 0 && this.action == showaction) return;

			//mxd. Don't update action args when old and new argument infos match
			if(arginfo != null && oldarginfo != null && ArgumentInfosMatch(arginfo, oldarginfo)) return;

			// Change the argument descriptions
			this.BeginUpdate();

			UpdateArgument(arg0, arg0label, arginfo[0]);
			UpdateArgument(arg1, arg1label, arginfo[1]);
			UpdateArgument(arg2, arg2label, arginfo[2]);
			UpdateArgument(arg3, arg3label, arginfo[3]);
			UpdateArgument(arg4, arg4label, arginfo[4]);

			if(!setuponly)
			{
				// Apply action's or thing's default arguments
				if(showaction != 0 || info != null)
				{
					arg0.SetDefaultValue();
                    arg1.SetDefaultValue();
					arg2.SetDefaultValue();
					arg3.SetDefaultValue();
					arg4.SetDefaultValue();
				}
				else //or set them to 0
				{
					arg0.SetValue(0);
                    arg1.SetValue(0);
					arg2.SetValue(0);
					arg3.SetValue(0);
					arg4.SetValue(0);
				}
                // arg0str currently can't have any default
                arg0named.Text = arg0strval = " ";
                arg0str.Text = arg0strval = " ";
            }

			// Store current action
			this.action = showaction;

			this.EndUpdate();
		}

		public void UpdateScriptControls()
		{
			// Update script-specific stuff
            if (arginfo[0].Str)
			{
                bool isacs = (Array.IndexOf(GZGeneral.ACS_SPECIALS, action) != -1);

                //mxd. Setup script numbers
                arg0int.Location = new Point(arg0.Location.X, arg0.Location.Y + 2);
                arg0int.Items.Clear();
                // [ZZ] note: only do this if our action is acs.
                if (isacs)
                {
                    foreach (ScriptItem si in General.Map.NumberedScripts.Values)
                        arg0int.Items.Add(new ColoredComboBoxItem(si, si.IsInclude ? SystemColors.HotTrack : SystemColors.WindowText));
                    arg0int.DropDownWidth = Tools.GetDropDownWidth(arg0int);
                }

                //mxd. Setup script names
                if (General.Map.UDMF)
                {
                    // [ZZ] note: only do this if our action is acs.
                    if (isacs)
                    {
                        arg0named.Items.Clear();
                        arg0named.Location = arg0int.Location;
                        foreach (ScriptItem nsi in General.Map.NamedScripts.Values)
                            arg0named.Items.Add(new ColoredComboBoxItem(nsi, nsi.IsInclude ? SystemColors.HotTrack : SystemColors.WindowText));
                        arg0named.DropDownWidth = Tools.GetDropDownWidth(arg0named);
                    }
                    else
                    {
                        arg0str.Clear();
                        arg0str.Location = arg0int.Location;
                    }
                }
                else
                {
                    arg0named.Visible = false;
                    arg0str.Visible = false;
                    cbuseargstr.Visible = false;
                }
                //

                // Update script controls visibility
                bool showarg0str = (General.Map.UDMF && havearg0str);
				cbuseargstr.Visible = General.Map.UDMF;
				cbuseargstr.Checked = showarg0str;
                arg0named.Visible = showarg0str && isacs;
                arg0str.Visible = showarg0str && !isacs;
				arg0int.Visible = (!showarg0str && isacs);
                arg0.Visible = (!showarg0str && !isacs);

				// Update named script name
				if(showarg0str)
				{
					Arg0Mode = ArgZeroMode.STRING;
					arg0str.Text = arg0named.Text = arg0strval;

                    if (isacs && General.Map.NamedScripts.ContainsKey(arg0strval))
                        UpdateScriptArguments(General.Map.NamedScripts[arg0strval]);
                }
				// Update numbered script name
				else if (isacs)
				{
                    Arg0Mode = ArgZeroMode.INT;

					// Special handling when there are multiple lines selected with different values for arg0 (so that it's left empty)
					if (string.IsNullOrEmpty(arg0.Text))
					{
						arg0int.Text = string.Empty;
					}
					else
					{
						int a0 = arg0.GetResult(0);
						if (General.Map.NumberedScripts.ContainsKey(a0))
						{
							int i = 0;
							foreach (ScriptItem item in General.Map.NumberedScripts.Values)
							{
								if (item.Index == a0)
								{
									arg0int.SelectedIndex = i;
									UpdateScriptArguments(item);
									break;
								}

								i++;
							}
						}
						else
						{
							// Unknown script number...
							arg0int.Text = a0.ToString();
						}
					}
				}
			}
			else
			{
                arg0.Visible = true;
                cbuseargstr.Visible = false;
				arg0named.Visible = false;
                arg0str.Visible = false;
				arg0int.Visible = false;
				cbuseargstr.Checked = false;
                Arg0Mode = ArgZeroMode.DEFAULT;
			}
		}

		private void UpdateArgument(ArgumentBox arg, Label label, ArgumentInfo info)
		{
			// Update labels
			label.Text = info.Title + ":";
			label.Enabled = info.Used;
			arg.ForeColor = (label.Enabled ? SystemColors.WindowText : SystemColors.GrayText);
			arg.Setup(info);

			// Update tooltip
			UpdateToolTip(label, info);
		}

		private void UpdateToolTip(Label label, ArgumentInfo info)
		{
			if(info.Used && !string.IsNullOrEmpty(info.ToolTip))
			{
				tooltip.SetToolTip(label, info.ToolTip);
				label.Font = new Font(label.Font, FontStyle.Underline);
				label.ForeColor = SystemColors.HotTrack;
			}
			else
			{
				tooltip.SetToolTip(label, null);
				label.Font = new Font(label.Font, FontStyle.Regular);
				label.ForeColor = SystemColors.WindowText;
			}
		}

		private void UpdateScriptArguments(ScriptItem item)
		{
			Label[] labels = { arg0label, arg1label, arg2label, arg3label, arg4label };
			ArgumentBox[] args = { arg0, arg1, arg2, arg3, arg4 };
			if(item != null)
			{
                int first;
				string[] argnames = item.GetArgumentsDescriptions(action, out first);
				for(int i = first; i < labels.Length; i++)
				{
					if(!string.IsNullOrEmpty(argnames[i]))
					{
						labels[i].Text = argnames[i] + ":";
						labels[i].Enabled = true;
						labels[i].Font = new Font(labels[i].Font, FontStyle.Regular);
						labels[i].ForeColor = SystemColors.WindowText;
					}
					else
					{
						labels[i].Text = arginfo[i].Title + ":";
						labels[i].Enabled = arginfo[i].Used;
						UpdateToolTip(labels[i], arginfo[i]);
					}

					args[i].ForeColor = (labels[i].Enabled ? SystemColors.WindowText : SystemColors.GrayText);
				}
			}
			else
			{
				for(int i = 1; i < labels.Length; i++)
				{
					labels[i].Text = arginfo[i].Title + ":";
					labels[i].Enabled = arginfo[i].Used;
					UpdateToolTip(labels[i], arginfo[i]);
					args[i].ForeColor = (labels[i].Enabled ? SystemColors.WindowText : SystemColors.GrayText);
				}
			}
		}

		//mxd
		private static bool ArgumentInfosMatch(ArgumentInfo[] info1, ArgumentInfo[] info2)
		{
			if(info1.Length != info2.Length) return false;
			bool haveusedargs = false; // Arguments should still be reset if all arguments are unused
			
			for(int i = 0; i < info1.Length; i++)
			{
				if(info1[i].Used != info2[i].Used || info1[i].Type != info2[i].Type 
					|| info1[i].Title.ToUpperInvariant() != info2[i].Title.ToUpperInvariant())
					return false;

                haveusedargs |= info1[i].Used;
			}

			return haveusedargs;
		}

		#endregion

		#region ================== Redraw control

		private void BeginUpdate()
		{
			SendMessage(this.Parent.Handle, WM_SETREDRAW, false, 0);
		}

		private void EndUpdate()
		{
			SendMessage(this.Parent.Handle, WM_SETREDRAW, true, 0);
			this.Parent.Refresh();
		}

		#endregion

		#region ================== Events

		private void cbuseargstr_CheckedChanged(object sender, EventArgs e)
		{
			if(!cbuseargstr.Visible) return;
            bool isacs = (Array.IndexOf(GZGeneral.ACS_SPECIALS, action) != -1);
            arg0named.Visible = (cbuseargstr.Checked && isacs);
            arg0str.Visible = (cbuseargstr.Checked && !isacs);
            arg0int.Visible = (!cbuseargstr.Checked && isacs);
            arg0.Visible = (!cbuseargstr.Checked && !isacs);
            Arg0Mode = (cbuseargstr.Checked ? ArgZeroMode.STRING : ArgZeroMode.INT);
		}

		private void arg0int_TextChanged(object sender, EventArgs e)
		{
			if(string.IsNullOrEmpty(arg0int.Text)) return;
			ScriptItem item = null;
			if(arg0int.SelectedIndex != -1)
			{
				item = ((ScriptItem)((ColoredComboBoxItem)arg0int.SelectedItem).Value);
			}
			else
			{
				int scriptindex;
				if(int.TryParse(arg0int.Text, out scriptindex) && General.Map.NumberedScripts.ContainsKey(scriptindex))
					item = General.Map.NumberedScripts[scriptindex];
			}

			UpdateScriptArguments(item);
		}

		private void arg0str_TextChanged(object sender, EventArgs e)
		{
			if(string.IsNullOrEmpty(arg0named.Text)) return;
			ScriptItem item = null;
			if(arg0named.SelectedIndex != -1)
			{
				item = ((ScriptItem)((ColoredComboBoxItem)arg0named.SelectedItem).Value);
			}
			else
			{
				string scriptname = arg0named.Text.Trim().ToLowerInvariant();
				if(General.Map.NamedScripts.ContainsKey(scriptname))
					item = General.Map.NamedScripts[scriptname];
			}

			UpdateScriptArguments(item);
		}

        #endregion

        private void scriptnames_TextChanged(object sender, EventArgs e)
        {

        }

        private void scriptnumbers_TextChanged(object sender, EventArgs e)
        {

        }
    }
}