import path from "path";
import dotenv, {DotenvConfigOutput} from "dotenv";
import StringUtil from '../utils/StringUtil';
import * as process from "process";
import {__approot, __businesspath, __ENV, __resourcepath} from "./ApplicationEnvironment";

export default class ApplicationConfig {
    private configration:DotenvConfigOutput = {};
    private env:any = {};
    private defaultBusinessServicePath:string = __businesspath||"../business/service";
    public static defaultConfig:ApplicationConfig;

    constructor(filePath:string) {

        let configPath = `${__resourcepath}/${__ENV}.env`;
        if (filePath != undefined && filePath !== null && filePath !== "") {
            configPath = filePath;
        }
        filePath = path.normalize(String(configPath));
        const conf = dotenv.config({
            path: filePath,
        });
        if (conf.error) {
            throw conf.error;
        }
        this.configration = conf;
        this.env = process.env;
    }

    public get(key:string, defaultValue?:string):string{
        let val: string = StringUtil.null2str(process.env, key);
        if(val === "" && defaultValue !== undefined){
            val = defaultValue;
        }
        return val;
    }

    public getInt(key:string, defaultValue?:number):number{
        let val: number = StringUtil.null2int(process.env, key, defaultValue);
        return val;
    }

    public getBusinessPath():string{
        let val: string = StringUtil.null2str(process.env, "BUSINESS.SERVICE.PATH");
        if(val === ""){
            val = this.defaultBusinessServicePath;
        }
        return val;
    }

    public getArray(key:string):Array<string>{
        let values:string[] = this.get(key).split(",");
        return values;
    }

    public static load(path:any):ApplicationConfig{
        const config = new ApplicationConfig(path);
        return config;
    }

    public static loadDefault():ApplicationConfig{
        if(this.defaultConfig){
            return this.defaultConfig;
        }
        this.defaultConfig = new this("");
        return this.defaultConfig;
    }
}