using UnityEngine;
using System.Collections;
using System;

namespace YLBattle
{
    public class LogicFighterFSM
    {
        /// <summary>
        /// 上下文环境
        /// </summary>
        private BattleParam mGlobalParam = null;

        /// <summary>
        /// 隶属战斗对象
        /// </summary>                                                
        private LogicFighter mOwner = null;
        /// <summary>
        /// 全局状态
        /// </summary>
        private BaseState mMainState = null;

        /// <summary>
        /// 当前状态
        /// </summary>
        private BaseState mCurrentState = null;

        /// <summary>
        /// 上一个状态
        /// </summary>
        private BaseState mPreviousState = null;

        #region(行为状态)
        /// <summary>
        /// 空闲状态
        /// </summary>
        private StateIdle mStateIdle = null;

        /// <summary>
        /// 死亡状态
        /// </summary>
        private StateDead mStateDead = null;

        /// <summary>
        /// 受击状态
        /// </summary>
        private StateHit mStateOnHit = null;

        /// <summary>
        /// 施法状态
        /// </summary>
        private StateAttack mStateAttack = null;

        /// <summary>
        /// 等待状态
        /// </summary>
        private StateHidden mStateHidden = null;

        /// <summary>
        /// 消失状态
        /// </summary>
        private StateDisapper mStateDisapper = null;

        /// <summary>
        /// 出场状态
        /// </summary>
        private StateArrival mStateArrival = null;

        /// <summary>
        /// 旋转状态
        /// </summary>
        private StateRoatate mStateRoatate = null;

        /// <summary>
        /// 等待状态
        /// </summary>
        private StateWait mStateWait = null;

        /// <summary>
        /// 打断当前状态
        /// </summary>
        public void BreakCurrentState()
        {
            this.ChangeState(BaseState.EFighterState.IDLE, false);
        }
        /// <summary>
        /// 获取上一次状态
        /// </summary>
        /// <returns>状态对象</returns>
        public BaseState GetPreviousState()
        {
            return this.mPreviousState;
        }
        #endregion

        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="param">环境配置信息</param>
        /// <param name="fighter">战斗对象</param>
        public void Initialize(BattleParam param, LogicFighter fighter)
        {
            this.mMainState = null;
            this.mGlobalParam = param;
            this.mOwner = fighter;

            this.mStateIdle = new StateIdle(this.mOwner, this.mGlobalParam);
            this.mStateOnHit = new StateHit(this.mOwner, this.mGlobalParam);
            this.mStateDead = new StateDead(this.mOwner, this.mGlobalParam);
            this.mStateAttack = new StateAttack(this.mOwner, this.mGlobalParam);
            this.mStateHidden = new StateHidden(this.mOwner, this.mGlobalParam);
            this.mStateDisapper = new StateDisapper(this.mOwner, this.mGlobalParam);
            this.mStateArrival = new StateArrival(this.mOwner, this.mGlobalParam);
            this.mStateRoatate = new StateRoatate(this.mOwner, this.mGlobalParam);
            this.mStateWait = new StateWait(this.mOwner, this.mGlobalParam);

            this.SetCurrentState(this.mStateHidden, null);
        }

        /// <summary>
        /// 设置当前状态
        /// </summary>
        /// <param name="current">状态</param>
        /// <param name="param">参数</param>
        public void SetCurrentState(BaseState current, object param)
        {
            this.mCurrentState = current;
            this.mCurrentState.OnEnter(param);
        }

        /// <summary>
        /// 获取当前行为状态
        /// </summary>
        /// <returns>状态对象</returns>
        public BaseState GetCurrentState()
        {
            return this.mCurrentState;
        }
        /// <summary>
        /// 状态周期调度
        /// </summary>
        /// <param name="now">当前逻辑时间</param>
        public void OnUpdateState(long now)
        {
            if (null != this.mCurrentState)
            {
                this.mCurrentState.OnUpdate();
            }
        }

        /// <summary>
        /// 切换到指定状态
        /// </summary>
        /// <param name="newState">新的状态</param>
        /// <param name="param">状态初始化参数</param>
        public void ChangeState(BaseState.EFighterState newState, object param)
        {
            BaseState st = null;
            switch (newState)
            {
                case BaseState.EFighterState.IDLE:
                    st = this.mStateIdle;
                    break;
                case BaseState.EFighterState.Attack:
                    st = this.mStateAttack;
                    break;
                case BaseState.EFighterState.ONHIT:
                    st = this.mStateOnHit;
                    break;
                case BaseState.EFighterState.DEAD:
                    st = this.mStateDead;
                    break;

                case BaseState.EFighterState.HIDDEN:
                    st = this.mStateHidden;
                    break;

                case BaseState.EFighterState.DISAPPER:
                    st = this.mStateDisapper;
                    break;

                case BaseState.EFighterState.ARRIVAL:
                    st = this.mStateArrival;
                    break;
                case BaseState.EFighterState.ROTATE:
                    st = this.mStateRoatate;
                    break;
                case BaseState.EFighterState.WAIT:
                    st = this.mStateWait;
                    break;
                default:
                    st = null;
                    break;
            }

            if (null == st)
            {
                return;
            }

            this.mCurrentState.OnLeave();
            this.mPreviousState = this.mCurrentState;
            this.mCurrentState = st;
            this.mCurrentState.OnEnter(param);
        }
    }
}