using UnityEngine;
using System.Collections.Generic;

public class CmdManager
{
    private CmdBase m_CurrentCmd;
    private Queue<CmdBase> m_CmdList = new Queue<CmdBase>();

    public void Enqueue(CmdBase cmd)
    {
        m_CmdList.Enqueue(cmd);
        //Debug.LogFormat("添加待执行命令: {0}", cmd.GetType());
    }

    public void ReplaceCurrent(CmdBase cmd)
    {
        m_CmdList.Clear();
        m_CurrentCmd = cmd;
    }

    public void Update()
    {
        if (m_CurrentCmd == null)
        {
            if (m_CmdList.Count > 0)
            {
                m_CurrentCmd = m_CmdList.Dequeue();
                //Debug.LogFormat("开始执行命令: {0}", m_CurrentCmd.GetType());
            }

            if (m_CurrentCmd == null)
            {
                return;
            }
        }

        m_CurrentCmd.Update();

        if (m_CurrentCmd.Finished())
        {
            //Debug.LogFormat("命令执行完结: {0}", m_CurrentCmd.GetType());
            if (m_CmdList.Count > 0)
            {
                m_CurrentCmd = m_CmdList.Dequeue();
                //Debug.LogFormat("开始执行命令: {0}", m_CurrentCmd.GetType());
            }
            else
            {
                m_CurrentCmd = null;
                //Debug.LogFormat("============== 命令队列完结 ============");
            }
        }
    }

    public void Clear()
    {
        m_CmdList.Clear();
    }
}