(function(app, $) { 'use strict';
  var namespace = 'talkers',
      tooltip_class = '.talkers-tooltip',
      COUNT_TALKERS = 32,
      WAIT_CLASS = 'wait',
      api;

  var tpl = ' <li class="talkers-tooltip"><a href="#tooltip" class="tooltip-trigger"><img src="';
      tpl += '{avatar}" width="60" height="60"></a>' + '\n';
      tpl += '  <div class="tooltip" style="display:none">';
      tpl += '    <div>';
      tpl += '      <a href="http://www.twitter.com/{user}" rel="nofollow" target="_blank">{user_name}</a>';
      tpl += '      <p>{text}</p>';
      tpl += '    </div>';
      tpl += '  </div>';
      tpl += '</li>';

  function convertURLs(tweet) {
    var regex = /(\b(https?|ftp|file):\/\/[\-A-Z0-9+&@#\/%?=~_|!:,.;]*[\-A-Z0-9+&@#\/%=~_|])/ig;
    return tweet.replace(regex, '<a href="$1" target="_blank" rel="nofollow">$1</a>');
  }

  function generateUserLinks(tweet) {
    var regex = /([@])([\w]+)/ig;
    return tweet.replace(regex, '<a href="https://twitter.com/$2" target="_blank" rel="nofollow" class="twLINKuser">$1$2</a>');
  }

  function generateSearchLinks(tweet) {
    var regex = /([#])([\w]+)/ig;
    return tweet.replace(regex, '<a href="https://twitter.com/#!/search/$2" target="_blank" rel="nofollow" class="twLINKuser">$1$2</a>');
  }

  function linkifyText(text) {
    return generateSearchLinks(generateUserLinks(convertURLs(text)));
  }


  function getNumTalkers($dom) {
    var wRow = $dom.parent().width(),
        wItem = $dom.find('li:last').outerWidth(true),
        EMPTY_SPACES = 3,
        num = Math.floor(wRow / wItem) * 2 - EMPTY_SPACES;
    return num;
  }

  function processTweets(data, $dom, $more) {
    if (!data || !data.results || !data.results.length) {
      return;
    }
    if (data.error) {
      console.error(data.error);
      return;
    }
    var results = data.results.slice(0, getNumTalkers($dom));
    $dom.show();
    $.each(results, function(i, tweet) {
      var s = tpl.replace('{avatar}', tweet.profile_image_url, 'g')
                .replace('{user}', tweet.from_user, 'g')
                .replace('{user_name}', tweet.from_user_name, 'g')
                .replace('{text}', linkifyText(tweet.text), 'g');
      $more.before(s);
    });

    $(tooltip_class).tooltip();
  }

  function errorLoading(err) {
    app.log('getTweets error', err);
  }

  function getSearchUrl(url, $dom) {
    var search_url = 'http://search.twitter.com/search.json?';
    search_url += 'q=' + url + ' -bahiadigital';

    var page = $dom.data('page') || 1;
    if (page > 1) {
      search_url += '&page=' + (parseInt(page, 10));
    }
    $dom.data('page', page + 1);
    search_url += '&rpp=' + COUNT_TALKERS;
    return search_url + '&callback=?';
  }

  function getTweets(url, $dom, $more) {
    var search_url = getSearchUrl(url, $dom);
    $dom.addClass(WAIT_CLASS);

    $.ajax({
      url: search_url,
      dataType: 'jsonp',
      success: function(data) {
        $dom.removeClass(WAIT_CLASS);
        processTweets(data, $dom, $more);
      },
      error: function(err) {
        $dom.removeClass(WAIT_CLASS);
        errorLoading(err);
      }
    });
  }

  function resolve_url(dom) {
    var url = dom.data('href');
    if (url === undefined) {
      if (app.environment.debug === true) {
        url = 'www.infobae.com';
      } else {
        url = window.location.href;
      }
    }
    return url;
  }

  function setupTalkers(domSel) {
    var $dom = $(domSel);
    if (! $dom.length) {
      return;
    }
    var tlk = $dom.data('talkers-first');
    if (tlk != undefined) {
      COUNT_TALKERS = tlk;
    }
    var $more = $dom.find('[data-more-talkers]');
    var url = encodeURIComponent(resolve_url($dom));
    getTweets(url, $dom, $more);

    $more.on('click', function(e) {
      e.preventDefault();
      getTweets(url, $dom, $more);
    });
  }

  app.on(namespace + '.show', setupTalkers);
  app.on(namespace + '.more', getTweets);
  api = {};

  app.register(namespace, api);

}(infobae, window.jQuery));