using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEngine.UI;

public class TimeScaleWindow : EditorWindow
{

    // Add menu named "My Window" to the Window menu

    private float weightedTimeScale = 0;

    [MenuItem("AddOn/TimeScale")]
    static void Init()
    {
        // Get existing open window or if none, make a new one:
        TimeScaleWindow window = (TimeScaleWindow)EditorWindow.GetWindow(typeof(TimeScaleWindow));
        window.Show();
    }

    void OnGUI()
    {
        GUILayout.Label("Base Settings", EditorStyles.boldLabel);

        GUILayout.BeginHorizontal();

        if (GUILayout.Button("<<")) NextPower(-1);
        if (GUILayout.Button("<")) weightedTimeScale--;

        if (GUILayout.Button(">")) weightedTimeScale++;
        if (GUILayout.Button(">>")) NextPower(1);

        GUILayout.EndHorizontal();

        weightedTimeScale = GUILayout.HorizontalSlider(weightedTimeScale, -100f, 100f);

        Time.timeScale = ConvertWeightedToRaw(weightedTimeScale);

        GUILayout.BeginHorizontal();

        if (GUILayout.Button("Pause")) weightedTimeScale = -100;
        var centeredStyle = GUI.skin.GetStyle("Label");
        centeredStyle.alignment = TextAnchor.UpperCenter;

        GUILayout.Label(DisplayString(Time.timeScale), centeredStyle);
        if (GUILayout.Button("Play")) Time.timeScale = 0;
        GUILayout.EndHorizontal();

    }

    private float ConvertWeightedToRaw(float input)
    {
        if (input > 0)
           return Mathf.Lerp(1, 100, input / 100);
        else
           return Mathf.Lerp(1, 0, -input / 100);
    }



    private void NextPower(int dir)
    {
        float sign = Mathf.Sign(weightedTimeScale);
        Debug.Log("Sign: " + sign);
        float value = Mathf.Abs(weightedTimeScale + dir);
        Debug.Log("Value: " + value);

        value = Mathf.NextPowerOfTwo((int)(value));

        if (Mathf.Sign(dir) != Mathf.Sign(weightedTimeScale))
            value /= 2;

        Debug.Log("retVal: " + value + " * " + sign);
        weightedTimeScale = value * sign;
    }


    private void SetSpeed(float newSpeed)
    {
        Time.timeScale = newSpeed;
    }

    private string DisplayString(float input)
    {
        return input.ToString() + " (" + weightedTimeScale + ")";

        if (input > 1)
            return Mathf.Floor(input).ToString();
        else
            return ("1/" + Mathf.Floor(-weightedTimeScale));
    }

}