import { Injectable } from '@nestjs/common';
import * as configMaster from './config.json';

@Injectable()
export class AppConfigService {
    defaultEnv = 'local';
    constructor() {
    }

    private getValue(key: string, throwOnMissing = true): any {
        const value = configMaster[this.defaultEnv].dbConfig[key];
        if (!value && throwOnMissing) {
            throw new Error(`config error - missing env.${key}`);
        }

        return value;
    }

    public ensureValues(keys: string[]) {
        keys.forEach(k => this.getValue(k, true));
        return this;
    }

    public getPort() {
        return this.getValue('PORT', true);
    }

    public isProduction() {
        const mode = this.getValue('MODE', false);
        return mode != 'DEV';
    }

    getDbConfig() {
        return configMaster[this.defaultEnv].dbConfig;
    }

    initializeFileSystem() {
        return configMaster[this.defaultEnv].fileConfig;
    }

    getMailConfig() {
        return configMaster[this.defaultEnv].mailConfig;
    }

    getJwtConfig(){
        return configMaster[this.defaultEnv].jwtConfig;
    }

    getVapidConfig(){
        return configMaster[this.defaultEnv].vapidConfig;
    }
}