import path from "path";
import os from 'os';
import { LdapAuthenticationConfiguration } from 'craftlab-auth/dist'

export interface Configuration {
    port: number;
    slave: boolean;
    slaves: Array<string>;
    masterPubKey: string;
    masterPrivateKey: string;
    hostname: string;
    apiKeys: string[];
    ldapAuthentication: LdapAuthenticationConfiguration|null
}

class ConfigurationManagerLoader {
    public static Load(fileName: string): Configuration {
        let config = require(fileName);

        config.slaves = config.slaves || [];
        if (config.slave && config.slaves?.length)
            throw new Error("Cannot have slaves while beeing slave");
        if (config.slave && !config.masterPubKey)
            throw new Error("Missing master public key for slave. Run with --generate-masterkey get get one");
        if (config.slaves.length && !config.masterPrivateKey)
            throw new Error("Missing master private key for slaves. Run with --generate-masterkey get get one");

        return {
            port: config.port || 9090,

            slave: config.slave || false,
            slaves: config.slaves || new Array(),
            masterPubKey: config.masterPubKey || "",
            masterPrivateKey: config.masterPrivateKey || "",

            apiKeys: config.apiKeys || [],
            hostname: os.hostname(),

            ldapAuthentication: config.ldapAuthentication ? <LdapAuthenticationConfiguration>{
                bindDnField: config.ldapAuthentication.bindDnField,
                bindBase: config.ldapAuthentication.bindBase,
                ldapUrl: config.ldapAuthentication.ldapUrl,
                usernameField: config.ldapAuthentication.usernameField,
                ldapFilter: config.ldapAuthentication.ldapFilter
            } : null
        };
    }
}

let ConfigurationManager = ConfigurationManagerLoader.Load(path.join(__dirname, "../config.json"));
export default ConfigurationManager;