import Log from "../Log";
import Timer from "../utils/Timer";
import ClassWithName from "../../interface/ClassWithName";

/**
 * 基类、单例
 */
export default class Provider implements ClassWithName {
    readonly className: string = 'Provider';
    private static _instance;

    private static readonly pool = {};

    constructor(...args: unknown[]) {
    }

    // 返回继承类的实例
    public static getInstance<T extends typeof Provider>(this: T, ...args: unknown[]): InstanceType<T> {
        if (!this._instance) {
            let startTime = new Timer();
            this._instance = new this(...args);
            let thatName = this._instance.getClassName() || this.name;
            Log.info('实例已创建,', thatName, this._instance, '耗时' + startTime.getTimeMs());
            Provider.pool[thatName] = this._instance;
        }
        return this._instance;
    }

    public static getPool() {
        return {
            pool: Provider.pool,
        }
    }

    public getClassName() {
        return this.className;
    }
}