using System;
using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.Timeline;

public class CurveControlMixerBehaviour : PlayableBehaviour
{

    Renderer m_Renderer;
    float inputWeight = 0;
    public override void ProcessFrame(Playable playable, FrameData info, object playerData)
    {
        m_Renderer = playerData as Renderer;

        if (m_Renderer == null)
            return;

        int inputCount = playable.GetInputCount();
        for (int i = 0; i < inputCount; i++)
        {
            inputWeight = playable.GetInputWeight(i);
            if (inputWeight == 0)
            {
                continue;
            }

            ScriptPlayable<CurveControlBehaviour> inputPlayable = (ScriptPlayable<CurveControlBehaviour>)playable.GetInput(i);
            CurveControlBehaviour input = inputPlayable.GetBehaviour();
            if (!m_Renderer.sharedMaterial.HasProperty(input.valueName))
            {
                continue;
            }
            switch (input.m_curveControlType)
            {
                case CurveControlType.Start:
                    // m_Renderer.sharedMaterial.SetFloat(input.valueName, input.defaultValue);
                    SetValue(m_Renderer, input, input.defaultValue);
                    break;
                case CurveControlType.Transition:
                    Playable PlayableDir = playable.GetGraph().GetRootPlayable(0);
                    float playtime = (float)PlayableDir.GetTime();
                    float weight = Mathf.InverseLerp((float)input.Clip.start, (float)input.Clip.end, playtime);
                    // m_Renderer.sharedMaterial.SetFloat(input.valueName, input.ac.Evaluate(weight));
                    SetValue(m_Renderer, input, input.ac.Evaluate(weight));
                    break;
                case CurveControlType.End:
                    // m_Renderer.sharedMaterial.SetFloat(input.valueName, input.defaultValue);
                    SetValue(m_Renderer, input, input.defaultValue);
                    break;
            }       
        }
    }

    public void SetValue(Renderer r, CurveControlBehaviour input, float v)
    {
        switch (input.mCurveValueType)
        {
            case CurveValueType.Float:
                r.sharedMaterial.SetFloat(input.valueName, v);
                break;
            case CurveValueType.Vector2:
                Vector2 v2 = Vector2.zero;
                if (input.index == 1 || input.index == 2)
                {
                    v2 = r.sharedMaterial.GetTextureScale(input.valueName);
                    if (input.index == 1)
                    {
                        v2.x = v;
                    }
                    else
                    {
                        v2.y = v;
                    }
                    r.sharedMaterial.SetTextureScale(input.valueName, v2);
                }
                else if (input.index == 3 || input.index == 4)
                {
                    v2 = r.sharedMaterial.GetTextureOffset(input.valueName);
                    if (input.index == 3)
                    {
                        v2.x = v;
                    }
                    else
                    {
                        v2.y = v;
                    }
                    r.sharedMaterial.SetTextureScale(input.valueName, v2);
                }
                break;
            case CurveValueType.Vector4:
                Vector4 v4 = r.sharedMaterial.GetVector(input.valueName);
                switch (input.index)
                {
                    case 1:
                        v4.x = v;
                        break;
                    case 2:
                        v4.y = v;
                        break;
                    case 3:
                        v4.z = v;
                        break;
                    case 4:
                        v4.w = v;
                        break;
                }
                r.sharedMaterial.SetVector(input.valueName, v4);
                break;
        }
    }

    public override void OnGraphStart(Playable playable)
    {
        base.OnGraphStart(playable);
    }

    public override void OnBehaviourPlay(Playable playable, FrameData info)
    {
        base.OnBehaviourPlay(playable, info);
    }

    public override void OnBehaviourPause(Playable playable, FrameData info)
    {
        base.OnBehaviourPause(playable, info);
    }
}