import * as fs from 'fs-extra'

import defaults from 'lodash.defaults'

import {getConfigFilePath} from './utils'

const configFilePath = getConfigFilePath()

const defaultConfig = {

hackmdAPIEndpointURL: 'https://api.hackmd.io/v1',

}

const envConfig = {

accessToken: process.env.HMD_API_ACCESS_TOKEN,

hackmdAPIEndpointURL: process.env.HMD_API_ENDPOINT_URL,

}

// look for a readable config file; we can merge it with the env.

let hasExistingConfigFile = false

try {

fs.accessSync(configFilePath, fs.constants.R_OK)

hasExistingConfigFile = true

// tslint:disable-next-line: no-unused

} catch {

// noop

}

let readConfig = {}

if (hasExistingConfigFile) {

try {

readConfig = JSON.parse(fs.readFileSync(configFilePath, 'utf8'))

} catch (error) {

throw new Error(`

Could not read JSON config file at ${configFilePath}. Encountered exception:

${error}

`)

}

}

// prefer environment config over file config

const config = defaults(envConfig, readConfig, defaultConfig)

export default config