using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Events;

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

public struct IntPair
{
    public int Key;
    public int Value;

    public IntPair(int key, int value)
    {
        Key = key;
        Value = value;
    }
}

public class StreamFont : Tween
{
    #region 变量

    public override bool InOrigin
    {
        get
        {
            if (Consecutive)
            {
                if (Target.fontSize.Equal(DestList[0]))
                {
                    _InOrigin = true;
                }
                else
                {
                    _InOrigin = false;
                }
            }
            else
            {
                if (Target.fontSize.Equal(DestKvList[0].Key))
                {
                    _InOrigin = true;
                }
                else
                {
                    _InOrigin = false;
                }
            }

            return _InOrigin;
        }
        set
        {
            _InOrigin = value;

            if (_InOrigin)
            {
                if (Consecutive)
                {
                    Target.fontSize = DestList[0];
                }
                else
                {
                    Target.fontSize = DestKvList[0].Key;
                }

                FinishBackward();
            }
        }
    }

    public override bool InDestination
    {
        get
        {
            if (Consecutive)
            {
                if (Target.fontSize.Equal(DestList.Last(0)))
                {
                    _InDestination = true;
                }
                else
                {
                    _InDestination = false;
                }
            }
            else
            {
                if (Target.fontSize.Equal(DestKvList.Last(0).Value))
                {
                    _InDestination = true;
                }
                else
                {
                    _InDestination = false;
                }
            }

            return _InDestination;
        }
        set
        {
            _InDestination = value;

            if (_InDestination)
            {
                if (Consecutive)
                {
                    Target.fontSize = DestList.Last(0);
                }
                else
                {
                    Target.fontSize = DestKvList.Last(0).Value;
                }

                FinishForward();
            }
        }
    }

    public int Phase;
    public int TotPhase;
    public int TempDest;
    public int TempDelta;
    public int TempOrigin;
    public bool Consecutive;
    public float TempDelay;
    public float TempDuration;
    public List<int> DestList = new List<int>();
    public List<float> DelayList = new List<float>();
    public List<float> DurationList = new List<float>();
    public List<IntPair> DestKvList = new List<IntPair>();
    public List<UnityAction> ActionList = new List<UnityAction>();

    public Text Target;
    public CurveFunctionF Func;

    #endregion

    public StreamFont(Text target, List<int> destList, List<float> delayList, List<float> durationList, bool originActive, bool destActive, Curve curve, bool cg = false, List<UnityAction> actionList = null) : base(cg, curve, target)
    {
        Func = ManaAnim.CurveFuncDicF[curve];
        Target = target;
        TotPhase = destList.Count - 1;
        Consecutive = true;

        DestList = destList;
        DelayList = delayList;
        ActionList = actionList;
        DurationList = durationList;

        if (ActionList.Valid())
        {
            if ((DestList.Count - 1) - ActionList.Count != -1)
            {
                throw new Exception();
            }
        }

        if (DestList.Count - DelayList.Count != 2)
        {
            throw new Exception();
        }

        if (DestList.Count - DurationList.Count != 1)
        {
            throw new Exception();
        }

        InForward = false;
        InBackward = false;

        DestActive = destActive;
        OriginActive = originActive;
    }

    public StreamFont(Text target, List<IntPair> destKvList, List<float> delayList, List<float> durationList, bool originActive, bool destActive, Curve curve, bool cg = false, List<UnityAction> actionList = null) : base(cg, curve, target)
    {
        Func = ManaAnim.CurveFuncDicF[curve];
        Target = target;
        TotPhase = destKvList.Count - 1;
        Consecutive = false;

        DelayList = delayList;
        ActionList = actionList;
        DestKvList = destKvList;
        DurationList = durationList;

        if (ActionList.Valid())
        {
            if (DestKvList.Count - ActionList.Count != -1)
            {
                throw new Exception();
            }
        }

        if (DestKvList.Count - DelayList.Count != 1)
        {
            throw new Exception();
        }

        if (DestKvList.Count - DurationList.Count != 0)
        {
            throw new Exception();
        }

        InForward = false;
        InBackward = false;

        DestActive = destActive;
        OriginActive = originActive;
    }


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

        if (Consecutive)
        {
            Phase = 1;
            TempDest = DestList[1];
            TempDelay = DelayList[0];
            TempOrigin = DestList[0];
            TempDuration = DurationList[0];
        }
        else
        {
            Phase = 0;
            TempDest = DestKvList[0].Value;
            TempDelay = DelayList[0];
            TempOrigin = DestKvList[0].Key;
            TempDuration = DurationList[0];
        }

        TempDelta = TempDest - TempOrigin;

        if (ActionList.Valid())
        {
                ActionList[0].SafeInvoke();
        }

        //if (InBackward)
        //{
        //    Timer = ManaAnim.GetTimerFloat(Target.fontSize, Duration, TempOrigin, TempDelta, Curve);
        //}
    }

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

        throw new Exception();
    }


    public override bool DoForward()
    {
        Timer += Time.fixedDeltaTime;
        
        if (Phase == TotPhase)
        {
            if (Timer > TempDuration)
            {
                FinishForward();

                Timer = 0;

                InForward = false;
                InDestination = true;

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

                if (ActionList.Valid())
                {
                    ActionList.Last(0).SafeInvoke();
                }

                return true;
            }
            else
            {
                Target.fontSize = (int)Func(Timer, TempDuration, TempOrigin, TempDelta);

                return false;
            }
        }
        else
        {
            if (Timer > TempDuration + TempDelay)
            {
                Timer = 0;
                Phase++;

                if (Consecutive)
                {
                    TempDest = DestList[Phase];
                    TempOrigin = DestList[Phase - 1];
                    TempDuration = DurationList[Phase - 1];

                    TempDelta = TempDest - TempOrigin;

                    if (Phase != DestList.Count - 1)
                    {
                        TempDelay = DelayList[Phase - 1];
                    }

                    if (ActionList.Valid())
                    {
                        ActionList[Phase - 1].SafeInvoke();
                    }
                }
                else
                {
                    TempDest = DestKvList[Phase].Value;
                    TempOrigin = DestKvList[Phase].Key;
                    TempDuration = DurationList[Phase];

                    TempDelta = TempDest - TempOrigin;

                    if (Phase != DestKvList.Count - 1)
                    {
                        TempDelay = DelayList[Phase];
                    }

                    if (ActionList.Valid())
                    {
                        ActionList[Phase].SafeInvoke();
                    }
                }

                return false;
            }
            else
            {
                Target.fontSize = (int)Func(Timer, TempDuration, TempOrigin, TempDelta);
                
                return false;
            }
        }
    }

    public override bool DoBackward()
    {
        throw new Exception();
    }
}