const tough = require('tough-cookie')
const { merge } = require('lodash')

module.exports.load = load

function load(config) {
	if (!config.site) throw new Error("The required 'site' property is missing")
	if (!config.url) throw new Error("The required 'url' property is missing")
	if (typeof config.url !== 'function' && typeof config.url !== 'string')
		throw new Error("The 'url' property should return the function or string")
	if (!config.parser) throw new Error("The required 'parser' function is missing")
	if (typeof config.parser !== 'function')
		throw new Error("The 'parser' property should return the function")
	if (config.logo && typeof config.logo !== 'function')
		throw new Error("The 'logo' property should return the function")

	const defaultConfig = {
		days: 1,
		lang: 'en',
		delay: 3000,
		output: 'guide.xml',
		request: {
			method: 'GET',
			maxContentLength: 5 * 1024 * 1024,
			timeout: 5000,
			withCredentials: true,
			jar: new tough.CookieJar(),
			responseType: 'arraybuffer',
			cache: false
		}
	}

	return merge(defaultConfig, config)
}