const config = require('../config');
const https = require("https");

module.exports = {
    getDomainList : function(url, callback){
        getRawDomainList(url,(raw)=>{
            let result = [];
            raw.split('\n').map(domain=>{
                let dot = domain.indexOf('.');
                if (dot !== -1){
                    let domainName = domain.substring(0,dot);
                    if (domainName.match(config.lettersOnlyRegex)){
                        //domain name contains only letters
                        //line in domain list is formatted as follows : [domain name]\t[expiration date]
                        result.push({domainName: domainName, expirationDate: domain.split('\t')[1]});
                    }
                }
            });
            applyFilter(result, callback);
        });
    }
};

var applyFilter = function (domains, callback){
    //get domain names that only match whole words
    let result = [];
    domains.map(domain=>{
        let index = config.words.indexOf(domain.domainName);
        if (index !== -1){
            result.push(domain);
        }
    });
    callback(result);
}

var getRawDomainList = function (url, callback) {
    https.get(url, res => {
        res.setEncoding("utf8");
        let body = "";
        res.on("data", data => {
            body += data;
        });
        res.on("end", () => {
            callback(body);
        });
    });
}