import { Prefab } from "cc";
import Singleton from "../../../extensions/ngame/assets/ngame/util/Singleton";
import { Camera } from "cc";
import GBaseMode from "./GBaseMode";
import { Node } from "cc";
import { instantiate } from "cc";
import { app } from "../App";
import { JNFrameInfo, JNSyncFrameEvent } from "../../../extensions/ngame/assets/ngame/sync/frame/JNSyncFrame";

export enum BattleMode{
    //无尽模式
    OnHook = 0,     
    //PVP 模式
    PVP = 1,
}

export interface GBattleModeInfo{
    modes:Prefab[], //模式预制体
    camera:Camera,  //场景相机
    root:Node,      //世界场景Root
}

//全局战斗模式管理器
export default class GBattleModeManager extends Singleton {

    //模式预制体
    modes:Prefab[] = [];
    //场景相机
    camera:Camera;
    //世界场景Root
    root:Node;

    //是否初始化
    isInit:boolean = false;

    //当前模式
    current:BattleMode = null;

    //是否自动退帧
    isAuto:boolean = false;

    //自动推帧间隔
    autoTime:number = 0;

    //初始化管理器
    async onInit(info:GBattleModeInfo){

        this.modes = info.modes || [];
        this.camera = info.camera;
        this.root = info.root;

        //监听帧同步 世界创建逻辑
        app.event.on(JNSyncFrameEvent.CLEAR,this.clear,this);
        app.event.on(JNSyncFrameEvent.CREATE,this.create,this);

        this.isInit = true;

    }

    //打开指定模式
    async Open(mode:BattleMode,isAuto:boolean = false){

        await this.Close();

        this.current = mode;
        this.setAuto(isAuto);

        app.sync.onReset();
        app.sync.onStart();

    }

    //关闭当前模式
    async Close(){

        //主动调用场景销毁
        app.sync.onReset();
        this.clear();
        this.current = null;

    }

    //设置自动推帧 ( 帧不由addFrame控制 管理器自动推帧)
    setAuto(is:boolean){
        this.isAuto = is;
        this.autoTime = 0;
    }

    //清除当前模式
    private clear(){
        if(!this.isInit) return;
        this.root.destroyAllChildren();
    }

    //创建当前模式
    private create(){
        if(!this.isInit || this.current == null) return;
        let mode = instantiate(this.modes[this.current]);
        mode.getComponent(GBaseMode).camera = this.camera;
        this.root.addChild(mode)

    }

    //向场景推帧
    addFrame(info:JNFrameInfo){
        if(this.isAuto) return; //如果是自动推帧则返回
        app.sync.addFrame(info,true);
    }

    //管理器更新
    onUpdate(dt:number){
        //更新帧同步
        app.sync.update(dt);
        //自动推帧
        this.onAutoFrame(dt);
    }
    
    //自动推帧
    private onAutoFrame(dt:number){

        if(!this.isAuto) return;
        
        this.autoTime += dt * 1000;

        //获取当前帧同步的帧数推空帧
        if(app.sync.nSyncTime < this.autoTime){
            //如果事件够则推帧
            this.autoTime -= app.sync.nSyncTime;
            app.sync.addFrame({
                index:app.sync.nLocalFrame + 1
            });
        }

    }

}