const { merge } = require('lodash')
const { CurlGenerator } = require('curl-generator')
const axios = require('axios').default
const axiosCookieJarSupport = require('axios-cookiejar-support').default
const { setupCache } = require('axios-cache-interceptor')
const { isPromise, getUTCDate } = require('./utils')

axiosCookieJarSupport(axios)

module.exports.create = create
module.exports.buildRequest = buildRequest
module.exports.parseResponse = parseResponse

let timeout

class Client {
	constructor() {}
}

function create(config) {
	const client = setupCache(
		axios.create({
			headers: {
				'User-Agent':
					'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36 Edg/79.0.309.71'
			}
		})
	)

	client.interceptors.request.use(
		function (request) {
			if (config.debug) {
				console.log('Request:', JSON.stringify(request, null, 2))
			}
			return request
		},
		function (error) {
			return Promise.reject(error)
		}
	)

	client.interceptors.response.use(
		function (response) {
			if (config.debug) {
				const data =
					isObject(response.data) || Array.isArray(response.data)
						? JSON.stringify(response.data)
						: response.data.toString()
				console.log(
					'Response:',
					JSON.stringify(
						{
							headers: response.headers,
							data,
							cached: response.cached
						},
						null,
						2
					)
				)
			}

			clearTimeout(timeout)
			return response
		},
		function (error) {
			clearTimeout(timeout)
			return Promise.reject(error)
		}
	)

	return client
}

async function buildRequest({ channel, date, config }) {
	date = typeof date === 'string' ? getUTCDate(date) : date
	const CancelToken = axios.CancelToken
	const source = CancelToken.source()
	const request = { ...config.request }
	timeout = setTimeout(() => {
		source.cancel('Connection timeout')
	}, request.timeout)
	request.headers = await getRequestHeaders({ channel, date, config })
	request.url = await getRequestUrl({ channel, date, config })
	request.data = await getRequestData({ channel, date, config })
	request.cancelToken = source.token

	if (config.curl) {
		const curl = CurlGenerator({
			url: request.url,
			method: request.method,
			headers: request.headers,
			body: request.data
		})
		console.log(curl)
	}

	return request
}

function parseResponse(response) {
	return {
		content: response.data.toString(),
		buffer: response.data,
		headers: response.headers,
		request: response.request,
		cached: response.cached
	}
}

async function getRequestHeaders({ channel, date, config }) {
	if (typeof config.request.headers === 'function') {
		const headers = config.request.headers({ channel, date })
		if (isPromise(headers)) {
			return await headers
		}
		return headers
	}

	return config.request.headers || null
}

async function getRequestData({ channel, date, config }) {
	if (typeof config.request.data === 'function') {
		const data = config.request.data({ channel, date })
		if (isPromise(data)) {
			return await data
		}
		return data
	}
	return config.request.data || null
}

async function getRequestUrl({ channel, date, config }) {
	if (typeof config.url === 'function') {
		const url = config.url({ channel, date })
		if (isPromise(url)) {
			return await url
		}
		return url
	}
	return config.url
}