const config = require('./config')
const axios = require('axios')
const colors = require('colors/safe')
const { Mod } = require('./classes')

class Helpers {

	api_url(endpoint) {
		return `${config.api_base.endsWith('/') ? config.api_base : config.api_base+'/'}${endpoint.startsWith('/') ? endpoint.substring(1) : endpoint}`
	}
	
	async fetch_mod(name) {
		try {
			const mod = await axios.get(this.api_url(name))
			return new Mod(name, mod.data)
		} catch(e) {
			this.error_out(`Unable to fetch mod ${name} - ${e}`)
		}
	}

	error_out(message) {
		console.log(`${colors.red('Fatal Error: ')}${message}`)
		process.exit()
	}

	async install_mod({argv, spinner, install}) {
		const mod = await this.fetch_mod(install)
		const version = argv.minecraft ? mod.get_version_by_minecraft(argv.minecraft, argv.type) : mod.get_version_by_id(argv.mod_version, argv.type)
		spinner.stop()

		if ( !version ) this.error_out('Unable to find mod version matching those criteria. To list available versions, use --list.')

		console.log('Installing mod version to repository...')
		mod.print_header()
		version.display()

		spinner.color = 'yellow'
		spinner.text = 'Download mod file (sorry about this)...'
		spinner.start()
		await version.wait(2000)
		await version.stage_download()
		spinner.stop()

		spinner.color = 'green'
		spinner.text = 'Verifying file staging...'
		spinner.start()

		if ( !(version.verify_stage()) ) {
			spinner.stop()
			this.error_out('We were unable to programmatically stage the downloaded JAR for this mod. Sorry.')
		} else {
			spinner.stop()
			console.log(colors.green('File staged successfully!'))
		}

		spinner.color = 'cyan'
		spinner.text = 'Preparing staged file for archive...'
		spinner.start()

		await version.archive_stage()

		spinner.color = 'green'
		spinner.text = 'Installing archive to repository...'

		await version.install_stage()
		spinner.stop()
		console.log(colors.green('Archive added to repository.'))

		version.print_solder()
	}

	list_installed_mods() {
		const { readdirSync } = require('fs')
		const getDirectories = source => readdirSync(source, { withFileTypes: true }).filter(dirent => dirent.isDirectory()).map(dirent => dirent.name)
		return getDirectories(`${config.repo}/mods`)
	}

	list_mod_versions(pkg) {
		const { readdirSync } = require('fs')
		const getFiles = source => readdirSync(source, { withFileTypes: true }).filter(dirent => dirent.isFile()).map(dirent => dirent.name)
		return getFiles(`${config.repo}/mods/${pkg}`)
	}

}

module.exports = exports = new Helpers