//流程模式
export enum GFSMProcessMode{
    Execute,//正常运行
    WaitExecute,//等待执行
}

//流程信息
export interface GFSMProcessInfo{
    //备注
    title:string;
    //模式
    mode?:GFSMProcessMode;
    //执行方法
    execute?:() => number;
    //前往
    to?:number[];
}

//状态机基类
export default class GFSMBase{

    //状态流程图
    process:{[key:number]:GFSMProcessInfo} = {};

    //开始流程Id
    start:number = 0;

    //当前流程
    current:number = 0;

    //状态机刷新
    onUpdate(dt:number){

        if(!this.start) this.start = 0;
        if(!this.current) this.current = 0;

        //运行流程
        this.execute(this.process[this.current]);

    }

    //执行流程
    execute(process:GFSMProcessInfo){
        if(!process) return;

        process.mode = process.mode || GFSMProcessMode.Execute;
        process.to = process.to || [];

        let next:number;
        let isReset:boolean = true;

        //执行流程
        switch(process.mode){
            case GFSMProcessMode.Execute:
                //执行方法
                next = process.to[process.execute()-1];
                break;
            case GFSMProcessMode.WaitExecute:
                //执行等待方法
                let state = process.execute();
                //如果 状态 -1 则 不重置 下一次状态从当前开始流程执行
                if(state == -1){
                    isReset = false;
                }else{
                    next = state;
                }
                break;
        }

        if(!this.process[next]) next = null;

        if(next){
            this.current = next;
            //运行下一个流程
            this.execute(this.process[next]);
        }else{
            if(isReset){
                //重置
                this.current = this.start;
            }
        }

    }

}