using UnityEngine;

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;

public class TweenGrayMesh : TweenRoot
{
    #region 变量

    public override bool InOrigin
    {
        get
        {
            if (Target.mesh.uv2[0].x.Equal(Origin))
            {
                InOrigin_ = true;
            }
            else
            {
                InOrigin_ = false;
            }

            return InOrigin_;
        }
        set
        {
            InOrigin_ = value;

            InPause = false;
            InForward = false;
            InBackward = false;

            if (InOrigin_)
            {
                for (int i = 0; i < UV2.Count; i++)
                {
                    UV2[i] = new Vector2(Origin, 1);
                }
                Target.mesh.SetUVs(1, UV2);

                BackwardFinish();
            }
        }
    }

    public override bool InDestination
    {
        get
        {
            if (Target.mesh.uv2[0].x.Equal(Destination))
            {
                InDestination_ = true;
            }
            else
            {
                InDestination_ = false;
            }

            return InDestination_;
        }
        set
        {
            InDestination_ = value;

            InPause = false;
            InForward = false;
            InBackward = false;

            if (InDestination_)
            {
                for (int i = 0; i < UV2.Count; i++)
                {
                    UV2[i] = new Vector2(Destination, 1);
                }
                Target.mesh.SetUVs(1, UV2);

                ForwardFinish();
            }
        }
    }

    public float Delta;
    public float Origin;
    public float Destination;
    public MeshFilter Target;
    public List<Vector2> UV2 = new List<Vector2>();
    public CurveFunctionF Func;

    #endregion

    public TweenGrayMesh(MeshFilter target, float origin, float destination, float duration, bool originActive, bool destActive, Curve curve) : base(false, curve, target)
    {
        Func = AnimManager.CurveFuncDicF[curve];
        Target = target;
        UV2 = Enumerable.Repeat(new Vector2(target.mesh.uv2[0].x, 1), target.mesh.vertices.Length).ToList();

        InForward = false;
        InBackward = false;

        Delta = destination - origin;
        Origin = origin;
        Duration = duration;
        DestActive = destActive;
        Destination = destination;
        OriginActive = originActive;
    }

    public override bool StartForward()
    {
        if (base.StartForward())
        {
            return true;
        }

        if (InBackward)
        {
            InBackward = false;

            Timer = AnimManager.GetTimerFloat(Target.mesh.uv2[0].x, Duration, Origin, Delta, Curve);
        }

        return false;
    }

    public override bool StartBackward()
    {
        if (base.StartBackward())
        {
            return true;
        }

        if (InForward)
        {
            InForward = false;

            Timer = AnimManager.GetTimerFloat(Target.mesh.uv2[0].x, Duration, Destination, -Delta, Curve);
        }

        return false;
    }

    public override bool DoForward()
    {
        Timer += Time.deltaTime;

        if (Timer > Duration)
        {
            InDestination = true;

            if (OnForwardFinish != null)
            {
                OnForwardFinish.Invoke();
            }

            SetLoop(EventType.ForwardFinish);

            return true;
        }
        else
        {
            float value = Func(Timer, Duration, Origin, Delta);
            for (int i = 0; i < UV2.Count; i++)
            {
                UV2[i] = new Vector2(value, 1);
            }
            Target.mesh.SetUVs(1, UV2);

            return false;
        }
    }

    public override bool DoBackward()
    {
        Timer += Time.deltaTime;

        if (Timer > Duration)
        {
            InOrigin = true;

            if (OnBackwardFinish != null)
            {
                OnBackwardFinish.Invoke();
            }

            SetLoop(EventType.BackwardFinish);

            return true;
        }
        else
        {
            float value = Func(Timer, Duration, Destination, -Delta);
            for (int i = 0; i < UV2.Count; i++)
            {
                UV2[i] = new Vector2(value, 1);
            }
            Target.mesh.SetUVs(1, UV2);

            return false;
        }
    }
}