import levelempty from "../resources/level/levelempty";
import { ConfigMgr } from "./game/cfg/configMgr";
import { Nest } from "./game/monster/nest";
import { ResMgr } from "./resMgr";


let pass = 3;

/**
 * 1 切换关卡
 */
export class LevelMgr {

    parent: cc.Node;
    title: cc.Label;
    passCnt: number = 0;

    private static _inst: LevelMgr;
    public static get inst(): LevelMgr {
        if (this._inst == null) {
            this._inst = new LevelMgr();
        }
        return this._inst;
    }
    
    async begin(){
        this.passCnt = 0;
        // this.load();

        let level = 1;

        let node = await ResMgr.inst.loadPrefab(`level/levelEmpty`, this.parent);
        let levelView = node.getComponent(levelempty);

        let levelData = ConfigMgr.inst.getCfgById('level', level);

        
        let nestData = ConfigMgr.inst.getCfgById('nest', levelData.nest);
        let nestCreator = new Nest(nestData, levelView.$top_node);
        nestCreator.begin();
    }

    next(){
        this.passCnt ++;
        if(this.passCnt >= pass) return;

        this.load();
    }
    
    private load() {
        this.title.string = `level${this.passCnt + 1}`;
        this.parent.destroyAllChildren();
        ResMgr.inst.loadPrefab(`level/level${this.passCnt + 1}`, this.parent);
    }
}