import 'colors'
import 'tagol'
import fs from 'fs'

const empty = o=> typeof o == 'string' ? o.trim() != '' : o.length > 0
export const  domains = []

export default function( file, watch = true )
{
	load( file )

	watch && fs.watchFile( file, (curr, prev) => {
		log `The domain list file changed at: ${curr.mtime}s`
		domains.splice(0)
		load( file )
	})

	return  domains
}

function load( path )
{
	log `Loading the domains file ${path.yellow}s...`

	parse( fs.readFileSync(path, 'utf-8') )
                .map( o=> domains.push(o) )
}

var currentDomain
function transform( line )
{
	let res
	if( line.length == 1 )
	{
		currentDomain = line.pop()
		return ''
	}
	if( line.length && line[0][line[0].length-1] == '.' )
	{
		line[0] = line[0] == '.'
			? currentDomain
			: line[0] + currentDomain
                                        // line[0] = line[0].replace(/\.$/g, '') + currentDomain
                                        // line[0] = line[0].substring(0,line[0].length-1)
                                        // line.splice(1,0,currentDomain)
	}
	//line.test = line[0][0] == line[0][line[0].length-1] == '/'   
        line.test = ( res = /^\/(.*)\/$/.exec(line[0]) )
			? new RegExp( res[1] )
			: new RegExp( '^' + line[0].replace(/\*/g, '(.*?)') + '$' )
	line.resolve = ( subDomain, domain, tld, match, path='PPP' )=> eval('`'+line[1]+'`')
	return line
}

function parse( text )
{
	return text
//		.replace(/\/\/.*?$/mg,'') // cut out comments
		.replace(/(^|\s)#.*?$/mg,'$1') // cut out comments
		.split('\n')
			.filter( empty )
			.map( line=> line.split(/\s+/).filter(empty) )
			.map( transform )
			.filter( empty )

}