'use strict';
const Joi = require('joi'); // object schema validation tool

const optionsSchema = Joi.object().keys({
    // a string representing a hostname or an ip
    host: Joi.alternatives().try(Joi.string().hostname(), Joi.string().ip()).default('127.0.0.1'),
    // a number in the allowed TCP port range, default to default mongodb port
    port: Joi.number().min(1).max(65535).default(27017),
    // If no database name, we create an random one that look like 'database_abcd' with a,b,c,d random numbers
    database: Joi.string().min(1).replace(' ', '_').default(`database_${Math.floor(Math.random() * 10000)}`),
    // username to use to connect to the db, default to none
    username: Joi.string().min(1).optional(),
    // password to use to connect to the db, default to none
    password: Joi.string().min(1).optional(),
    // enable or disable mongoose debug mode, default to false
    debug: Joi.boolean().default(false),
    // reference to the implementation of promises to use
    promise: Joi.string().min(1).optional(),
    // array of strings to be used as logging tags for the plugin. Default is ["mongoose-nest"]
    logTags: Joi.array().items(Joi.string().min(1)).default(['mongoose-nest'])
});


module.exports.validateOptions = function (options) {

    const parsed = Joi.validate(options, optionsSchema);
    return parsed;
};

module.exports.builConnectionString = function (validOptions) {

    let result = 'mongodb://';

    if (validOptions.username && validOptions.password) {
        result += `${validOptions.username}:${validOptions.password}@`;
    }

    result += `${validOptions.host}:${validOptions.port}/${validOptions.database}`;

    return result;
};