'use strict';

var fs = require('fs');
var PromiseA = require('bluebird');

module.exports.fetchFromDisk = function (args, defaults) {
  var hostname = args.domains[0];
  var crtpath = (args.fullchainPath || defaults.fullchainPath)
    || (defaults.configDir
      + (args.fullchainTpl || defaults.fullchainTpl || ':hostname/fullchain.pem').replace(/:hostname/, hostname));
  var privpath = (args.privkeyPath || defaults.privkeyPath)
    || (defaults.configDir
      + (args.privkeyTpl || defaults.privkeyTpl || ':hostname/privkey.pem').replace(/:hostname/, hostname));

  return PromiseA.all([
    fs.readFileAsync(privpath, 'ascii')
  , fs.readFileAsync(crtpath, 'ascii')
    // stat the file, not the link
  , fs.statAsync(crtpath)
  ]).then(function (arr) {
    return {
      key: arr[0]  // privkey.pem
    , cert: arr[1] // fullchain.pem
      // TODO parse centificate for lifetime / expiresAt
    , issuedAt: arr[2].mtime.valueOf()
    };
  }, function () {
    return null;
  });
};