import { _decorator } from "cc";
import { logger } from "db://assets/Scripts/Main/Common/Logger";

const { ccclass, property } = _decorator;

//事件管理器
@ccclass
export default class li_EventManager {
    private static _Instance: li_EventManager = null;
    private _netEvent: object = {};
    private _innerEvent: object = {};

    public static get I(): li_EventManager {
        if (!li_EventManager._Instance) {
            li_EventManager._Instance = new li_EventManager();
        }
        return li_EventManager._Instance;
    }

 

    /**监听网络事件 */
    public onNetEL(netCodeId: number | string, ...param: any[]) {
        if (netCodeId) {
            let handlerArray = this._netEvent[netCodeId];
            if (!handlerArray) {
                return;
            }
            for (let i = 0; i < handlerArray.length; i++) {
                const func = handlerArray[i];
                if (func) {
                    if (func.i_target) {
                        func.apply(func.i_target, param);
                    } else {
                        func(param[0], param[1]);
                    }
                }
            }
        }
    }
    /**添加网络事件 */
    public addNetEL(netCodeId: number | string, i_callback: any, i_target: any = null): void {
        if (this._netEvent[netCodeId] == null) {
            this._netEvent[netCodeId] = [];
        }
        i_callback.i_target = i_target;
        this._netEvent[netCodeId].push(i_callback);
    }
    /**移除网络事件 */
    public removeNetEL(netCodeId: number | string, i_callback: any) {
        let handlerArray = this._netEvent[netCodeId];
        if (!handlerArray) return;
        let index = handlerArray.indexOf(i_callback);
        if (index >= 0) {
            handlerArray.splice(index, 1);
            for (let idx in handlerArray) {
                if (handlerArray[+idx] == i_callback) {
                    return;
                }
            }
            i_callback.i_target = null;
        }
    }


    /**监听本地事件 */
    public onInnerEL(innerId: number | string, ...param: any[]) {
        if (this._innerEvent[innerId] == null) {
            return;
        }
        let handlerArray: Array<any> = this._innerEvent[innerId];
        let i: number = 0;
        let length: number = handlerArray.length;
        let handler: Array<any> = null;
        while (i < length) {
            handler = handlerArray[i];
            if (handler == null) {
                i++;
                continue;
            }
            if ((handler[1] && handler[1]["isValid"] && handler[1]["isValid"] == false) ||
                (handler[1] && handler[1]["node"] && handler[1]["node"]["isValid"] && handler[1]["node"]["isValid"] == false)) {
                //当前事件的节点以失效或销毁（事件未移除）
                handlerArray.splice(i, 1);
            } else {
                try {
                    handler[0].apply(handler[1], param);
                } catch (e) {
                    logger.error("innerErr:" + e.stack);
                }
            }
            if (handlerArray.length != length) {
                length = handlerArray.length;
                i--;
            }
            i++;
        }
    }
    /**添加本地事件 */
    public addInnerEL(innerId: number | string, i_callback: Function, obj: any): void {
        let handlerArray: Array<any> = this._innerEvent[innerId];
        if (handlerArray == null) {
            handlerArray = [];
            this._innerEvent[innerId] = handlerArray;
        }
        //检测是否已经存在
        for (let i = 0; i < handlerArray.length; i++) {
            if (handlerArray[i] == null || (handlerArray[i][0] == i_callback && handlerArray[i][1] == obj)) {
                return;
            }
        }
        this._innerEvent[innerId].push([i_callback, obj]);
    }
    /**移除本地事件 */
    public removeInnerEL(innerId: number | string, i_callback: Function, obj: any) {
        let handlerArray: Array<any> = this._innerEvent[innerId];
        if (!handlerArray) return;
        for (let i = 0; i < handlerArray.length; i++) {
            if (handlerArray[i] == null || (handlerArray[i][0] == i_callback && handlerArray[i][1] == obj)) {
                handlerArray.splice(i, 1);
                break;
            }
        }
        if (handlerArray.length == 0) {
            handlerArray[innerId] = null;
            delete this._innerEvent[innerId];
        }

    }

    
    /**
     * 移除某一对象的所有内部监听
     * @param listenerObj 侦听函数所属对象
     */
    public removeAllInnerEL(listenerObj: any): void {
        let keys = Object.keys(this._innerEvent);
        for (let i: number = 0, len = keys.length; i < len; i++) {
            let type = keys[i];
            let arr: Array<any> = this._innerEvent[type];
            if (arr) {
                for (let j = 0; j < arr.length; j++) {
                    if (arr[j][1] == listenerObj) {
                        arr.splice(j, 1);
                        j--;
                    }
                }
                if (arr.length == 0) {
                    delete this._innerEvent[type];
                }
            }
        }
    }
    /**
    * 移除某一对象的所有网络监听
    * @param listenerObj 侦听函数所属对象
    */
    public removeAllNetEL(listenerObj: any): void {
        let keys = Object.keys(this._netEvent);
        for (let i: number = 0, len = keys.length; i < len; i++) {
            let type = keys[i];
            let arr: Array<any> = this._netEvent[type];
            if (arr) {
                for (let j = 0; j < arr.length; j++) {
                    if (arr[j].i_target == listenerObj) {
                        arr.splice(j, 1);
                        j--;
                    }
                }
                if (arr.length == 0) {
                    delete this._netEvent[type];
                }
            }
        }
    }

    /**移除所有监听 */
    public removeAllEL() {
        this._netEvent = {};
        this._innerEvent = {};
    }
}