import DateTime from "../help/DateTime";
import { GameEvent } from "./GameEvent";

const { ccclass, property } = cc._decorator;

@ccclass
export default class EventMgr extends cc.Component {
    public static Instance: EventMgr = null;

    private events_map = {};

    onLoad() {
        if (EventMgr.Instance === null) {
            EventMgr.Instance = this;
        }
        else {
            this.destroy();
            return;
        }
    }

    // func(event_name: string, udata: any)
    public add_event_listenner(event_name, caller, func) {
        if (!this.events_map[event_name]) {
            this.events_map[event_name] = [];
        }

        var event_queue = this.events_map[event_name];
        event_queue.push({
            caller: caller,
            func: func
        });
    }

    public remove_event_listenner(event_name, caller, func) {
        if (!this.events_map[event_name]) {
            return;
        }

        var event_queue = this.events_map[event_name];
        for(var i = 0; i < event_queue.length; i ++) {
            var obj = event_queue[i];
            if (obj.caller == caller && obj.func == func) {
                // if (event_name==GameEvent.HeroSuperSkill) {
                //     console.error("移除监听列表:"+DateTime.formatDate());
                //     console.error(obj.caller);
                // }
                event_queue.splice(i, 1);
                break;
            }
        }

        if (event_queue.length <= 0) {
            this.events_map[event_name] = null;
        }
    }

    public remove_event_all(event_name, caller) {
        if (!this.events_map[event_name]) {
            return;
        }

        var event_queue = this.events_map[event_name];
        for(var i = 0; i < event_queue.length; i ++) {
            var obj = event_queue[i];
            if (obj.caller == caller) {
                event_queue.splice(i, 1);
                break;
            }
        }

        if (event_queue.length <= 0) {
            this.events_map[event_name] = null;
        }
    }


    public dispatch_event(event_name, udata = null) {
        if (!this.events_map[event_name]) {
            return;
        }

        var event_queue = this.events_map[event_name];
        
        // if (event_name==GameEvent.HeroSuperSkill) {
        //     console.warn("事件监听列表:"+ event_queue.length+"   "+DateTime.formatDate());
        // }


        let eQueue= event_queue.slice();//克隆数组event_queue，否则在遍历数组过程中移除数据，会导致遍历出错

        for(var i = 0; i < eQueue.length; i ++) {

            var obj = eQueue[i];

            // if (event_name==GameEvent.HeroSuperSkill) {
            //     console.warn(DateTime.formatDate());
            //     console.warn(obj.caller);
            // }

            obj.func.call(obj.caller, event_name, udata);
        }
    }
}