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

public class RecordPlayer
{
    protected BattleField battleField;

    private Queue<RecordAction> recordActionQueue = new Queue<RecordAction>();
    protected RecordAction currentRecordAction;

    protected List<RecordAction> immediatelyActionList = new List<RecordAction>();

    private bool isWaitingNextAction = false;
    private float waitTimer = 0f;
    private const float waitInterval = 0.2f;

    private float speedRatio = 1.5f;

    public void Init(BattleField _battleField)
    {
        Release();
        battleField = _battleField;
    }

    public bool IsPlaying()
    {
        return currentRecordAction != null || recordActionQueue.Count > 0 || immediatelyActionList.Count > 0;
    }

    public void PlayRecord(RecordAction recordAction)
    {
        // BattleDebug.LogError("Enqueue record action " + recordAction.GetType());
        recordActionQueue.Enqueue(recordAction);
    }

    public void PlayRecord(List<RecordAction> recordActions)
    {
        for (int i = 0; i < recordActions.Count; i++)
        {
            PlayRecord(recordActions[i]);
        }
    }

    public void InsertRecord(RecordAction recordAction)
    {
        // BattleDebug.LogError("Insert record action " + recordAction.GetType());
        if (currentRecordAction != null)
        {
            Queue<RecordAction> tempQueue = new Queue<RecordAction>();
            tempQueue.Enqueue(recordAction);
            while (recordActionQueue.Count > 0)
            {
                tempQueue.Enqueue(recordActionQueue.Dequeue());
            }
            recordActionQueue = tempQueue;
        }
        else
        {
            recordActionQueue.Enqueue(recordAction);
        }
    }

    public void ImmediatelyPlay(RecordAction recordAction)
    {
        immediatelyActionList.Add(recordAction);
    }

    protected void ImmediatelyPlayRun()
    {
        if (immediatelyActionList.Count > 0)
        {
            List<int> removeIndexList = new List<int>();

            for (int i = immediatelyActionList.Count - 1; i >= 0; i--)
            {
                var action = immediatelyActionList[i];
                if (!action.IsFinished())
                {
                    action.Run();
                    continue;
                }

                removeIndexList.Add(i);
            }

            for (int i = removeIndexList.Count - 1; i >= 0; i--)
            {
                immediatelyActionList.RemoveAt(removeIndexList[i]);
            }
        }
    }

    public virtual void Run()
    {
        ImmediatelyPlayRun();

        // 等待下一个action
        if (isWaitingNextAction)
        {
            waitTimer += Time.deltaTime * speedRatio;
            if (waitTimer >= waitInterval)
            {
                isWaitingNextAction = false;
                waitTimer = 0f;
            }
            else
            {
                return;
            }
        }

        if (currentRecordAction == null)
        {
            if (recordActionQueue.Count <= 0)
            {
                return;
            }
        }

        if (currentRecordAction != null && !currentRecordAction.IsFinished())
        {
            currentRecordAction.Run();
            return;
        }

        if (currentRecordAction != null && currentRecordAction.IsFinished())
        {
            // BattleDebug.LogError("record action " + currentRecordAction.GetType() + " play finished");
            currentRecordAction = null;
            isWaitingNextAction = true;
            waitTimer = 0f;
            return;
        }

        if (currentRecordAction == null)
        {
            if (recordActionQueue.Count > 0)
            {
                currentRecordAction = recordActionQueue.Dequeue();
                // BattleDebug.LogError("play record action " + currentRecordAction.GetType());
            }
        }
    }

    //  先预留 感觉用的上
    public virtual void ResumeGame()
    {

    }

    public virtual void PauseGame()
    {

    }

    public void HaveRest()
    {
        for (int i = 0; i < immediatelyActionList.Count; i++)
        {
            immediatelyActionList[i].ForceFinish();
        }

        immediatelyActionList.Clear();

        if (currentRecordAction != null)
        {
            currentRecordAction.ForceFinish();
        }
        currentRecordAction = null;

        while (recordActionQueue.Count > 0)
        {
            recordActionQueue.Dequeue().ForceFinish();
        }
    }

    public void Release()
    {
        if (null != currentRecordAction)
        {
            currentRecordAction.ForceFinish();
        }
        currentRecordAction = null;
        recordActionQueue.Clear();
        immediatelyActionList.Clear();
    }

    public void SetSpeedRatio(float ratio)
    {
        speedRatio = ratio;
    }
}