import getConfig from "next/config";
import * as jwt from "jsonwebtoken";

class Config {
  private data : ConfigData | null;
  
  constructor(data: ConfigData) {
    this.data = data;

    while (this.data.api && this.data.api.urlRoot.endsWith("/")) {
      this.data.api.urlRoot = this.data.api.urlRoot.slice(0, -1)
    }
  }

  auth0(): {clientId: string, clientSecret: string, domain: string} {
    return {
      clientId: this.data.auth0.clientId,
      clientSecret: this.data.auth0.secret,
      domain: this.data.auth0.domain,
    }
  }

  session(): ConfigDataSession {
    return this.data.session
  }

  apiUrl(path: string) {
    return this.data.api.urlRoot + path;
  }

  jwtToken(username: string, expiry: number = 15): string {
    return jwt.sign({
      user: username,
      exp: Math.floor((Date.now() / 1000) + expiry),
    }, this.data.api.secretKey, {
      header: {
        kid: this.data.api.secretId,
      }
    })
  }
}

export interface ConfigData {
  api: ConfigDataAPI
  auth0: ConfigDataAuth0
  session: ConfigDataSession
  redis: ConfigDataRedis
}

interface ConfigDataAPI {
  urlRoot: string
  secretId: string
  secretKey: string
}

interface ConfigDataAuth0 {
  secret: string
  clientId: string
  domain: string
}

interface ConfigDataSession {
  secret: string
  secure?: boolean
}

interface ConfigDataRedis {
  host: string
  port: number
}

const config = new Config(getConfig().serverRuntimeConfig);

export default config;