/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//  D E R E L I C T
//
/// // (c) 2003..2024
using Godot;
using Microsoft.Diagnostics.Tracing.Parsers.IIS_Trace;
using System;

/*
T O D O:
x) Add blinking cursor

D O I N G:


D O N E:

*/

[GlobalClass]
public partial class TextAnimate : Control
{


	public Action<string> OnFinshed;



	[Export]
	public NodePath TargetPath = "..";

	[Export]
	public int TrimStartCount = 0;

	[Export]
	public int TrimeEndCount = 0;

	[Export]
	public double InitialDelay = 0;

	[Export]
	public double MSPerChar = 100;

	[Export]
	public string OriginalText = "{ERR_BROKEN_TextAnimate}";

	[Export]
	public string Cursor = "";


	[ExportCategory( "Runtime" )]
	[Export]
	public Control TargetControl = null;


	[Export]
	public string TextSuffix = "";

	[Export]
	public int CharCount = 0;

	[Export]
	public double TimeTillNextChar = 0;

	//Dont need prefix string since thats implicit in OriginalText

	[Export]
	public string SuffixStr = "";


	Func<String> GetNodeText;
	Action<String> SetNodeText;



	// Called when the node enters the scene tree for the first time.
	public override void _Ready()
	{
		log.var( this.Name );

		//log.info($"{this?.Name}");

		if( TargetPath == null || TargetPath.IsEmpty )
		{
			var parent = GetParent();

			if( parent != null )
			{
				log.info( $"{Name}: No TargetPath set, using parent {parent.Name}" );
				TargetPath = parent.GetPath();
			}
			else
			{
				log.warn( $"{Name}: No TargetPath set and no parent to use" );
				ProcessMode = ProcessModeEnum.Disabled;
				return;
			}

			return;
		}

		TargetControl = GetNode<Control>( TargetPath );

		if( TargetControl == null )
		{
			log.warn( $"{Name}({this.NamePath()}): No node at {TargetPath}" );
			return;
		}

		//*
		if( TargetControl is LineEdit tcLineEdit )
		{
			log.info( $"{Name} Connect to {TargetControl.Name}'s TextChanged" );
			tcLineEdit.TextChanged += ( text ) => Reset();
		}
		else if( TargetControl is RichTextLabel richTextLabel )
		{
			log.info( $"{Name} Connect to {TargetControl.Name}'s TextChanged" );
		}
		else if( TargetControl is Button button )
		{
			log.info( $"{Name} Connect to {TargetControl.Name}'s TextChanged" );
		}
		else
		//*/
		{
			log.high( $"{this?.Name} NOT CONNECTED {TargetControl?.Name}'s TextChanged" );
		}


		//if( TargetControl is RichTextLabel rtLabel ) rtLabel.TextChanged += ( text ) => Reset();

		log.info( $"{this.Name}: TargetControl is {TargetControl?.GetType().Name}" );

		var propInfo = TargetControl?.GetType().GetProperty( "Text" );
		var getMethod = propInfo?.GetGetMethod();
		var setMethod = propInfo?.GetSetMethod();

		if( getMethod == null || setMethod == null )
		{
			log.warn( $"{Name}: No Text property on {TargetControl?.GetType().Name}" );
			return;
		}


		GetNodeText = (Func<String>)Delegate.CreateDelegate( typeof( Func<String> ), TargetControl, getMethod );
		SetNodeText = (Action<String>)Delegate.CreateDelegate( typeof( Action<String> ), TargetControl, setMethod );

		OriginalText = GetNodeText();

		SuffixStr = OriginalText.Substring( OriginalText.Length - TrimeEndCount );

		Reset();

		//log.debug( $"D O N E  {GetType().Name}._Ready" );
	}

	public void Reset( double delayMs = -1, string origText = "" )
	{
		if( ProcessMode == ProcessModeEnum.Disabled )
			return;


		if( GetNodeText == null || SetNodeText == null )
		{
			log.warn( $"{Name}: No Text property on {TargetControl?.GetType().Name}" );
			return;
		}


		if( string.IsNullOrWhiteSpace( origText ) )
			origText = GetNodeText();

		InitialDelay = delayMs / 1000.0;

		ProcessMode = ProcessModeEnum.Inherit;

		OriginalText = origText;

		if( delayMs < 0 )
		{
			delayMs = MSPerChar;
		}

		//log.debug( $"TA.Text Reset {OriginalText}" );

		CharCount = TrimStartCount;

		var text = OriginalText.Substring( 0, TrimStartCount );
		TimeTillNextChar = delayMs / 1000.0;
		SetNodeText( $"{text}{Cursor}{SuffixStr}" );

		++CharCount;
	}



	// Called every frame. 'delta' is the elapsed time since the previous frame.
	public override void _Process( double delta )
	{

		if( ProcessMode == ProcessModeEnum.Disabled )
			return;


		if( GetNodeText == null || SetNodeText == null )
		{
			return;
		}


		//log.info($"{this.Name}");

		if( InitialDelay > 0 )
		{
			InitialDelay -= delta;
			return;
		}

		TimeTillNextChar -= delta;

		if( TimeTillNextChar <= 0 )
		{
			TimeTillNextChar += ( MSPerChar / 1000.0 );

			if( CharCount < OriginalText.Length )
			{
				//SetNodeText( TextPrefix + OriginalText.Substring( 0, CharCount ) + TextSuffix );
				var newText = $"{OriginalText.Substring( 0, CharCount )}{Cursor}{SuffixStr}";
				SetNodeText( newText );

				++CharCount;
			}
			else
			{
				SetNodeText( OriginalText );
				OnFinshed?.Invoke( OriginalText );
				//ProcessMode = ProcessModeEnum.Disabled;
			}
		}
	}
}