using UnityEngine;

using System;
using System.Collections;

public class TweenVec : Tween
{
    #region

    public override bool InOrigin
    {
        get
        {
            if (Local)
            {
                if (Target.localPosition.Equal(Origin))
                {
                    _InOrigin = true;
                }
                else
                {
                    _InOrigin = false;
                }
            }
            else
            {
                if (Target.position.Equal(Origin))
                {
                    _InOrigin = true;
                }
                else
                {
                    _InOrigin = false;
                }
            }

            return _InOrigin;
        }
        set
        {
            _InOrigin = value;

            if (_InOrigin)
            {
                if (Local)
                {
                    Target.localPosition = Origin;
                }
                else
                {
                    Target.position = Origin;
                }

                FinishBackward();
            }
        }
    }

    public override bool InDestination
    {
        get
        {
            if (Local)
            {
                if (Target.localPosition.Equal(Destination))
                {
                    _InDestination = true;
                }
                else
                {
                    _InDestination = false;
                }
            }
            else
            {
                if (Target.position.Equal(Destination))
                {
                    _InDestination = true;
                }
                else
                {
                    _InDestination = false;
                }
            }

            return _InDestination;
        }
        set
        {
            _InDestination = value;

            if (_InDestination)
            {
                if (Local)
                {
                    Target.localPosition = Destination;
                }
                else
                {
                    Target.position = Destination;
                }

                FinishForward();
            }
        }
    }

    public bool Local;
    public Vector3 Delta;
    public Vector3 Origin;
    public Vector3 Destination;
    public Transform Target;
    public CurveFunctionV Func;

    #endregion

    public TweenVec(Transform target, Vector3 origin, Vector3 destination, float duration, bool local, bool originActive, bool destActive, Curve curve, bool cg = false) : base(cg, curve, target)
    {
        CanvasGroup = target.GetComponent<CanvasGroup>();

        Curve = curve;
        Func = ManaAnim.CurveFuncDicV[curve];
        Target = target;

        InForward = false;
        InBackward = false;

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


    public override void StartForward()
    {
        base.StartForward();
        
        if (InBackward)
        {
            Timer = ManaAnim.GetTimerVec3(Target.position, Duration, Origin, Delta, Curve);
        }
    }

    public override void StartBackward()
    {
        base.StartBackward();

        if (InForward)
        {
            Timer = ManaAnim.GetTimerVec3(Target.position, Duration, Destination, -Delta, Curve);
        }
    }


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

        if (Timer > Duration)
        {
            FinishForward();

            Timer = 0;

            InForward = false;
            InDestination = true;

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

            return true;
        }
        else
        {
            if (Local)
            {
                Target.localPosition = Func(Timer, Duration, Origin, Delta);
            }
            else
            {
                Target.position = Func(Timer, Duration, Origin, Delta);
            }

            return false;
        }
    }

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

        if (Timer > Duration)
        {
            FinishBackward();

            Timer = 0;

            InBackward = false;
            InOrigin = true;

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

            return true;
        }
        else
        {
            if (Local)
            {
                Target.localPosition = Func(Timer, Duration, Destination, -Delta);
            }
            else
            {
                Target.position = Func(Timer, Duration, Destination, -Delta);
            }

            return false;
        }
    }
}