// Generated by CoffeeScript 1.7.1

/*
	ENHANCED RANDOM ARTICLE
	Documentation: [[Wikipedia:Enhanced Random Article]]
	Description: Enhances the existing "Random article" feature.
		Disambiguation pages, redirects, and pages with titles that match a certain pattern can be skipped over.
	
	TODO
	- Match patterns to NOT show.
 */
var addEnhancedRandomArticlePortletLink, addPortletLink, checkRandomMatch, eRCheckMatches, eRCreateArticleList, enhancedRandomArticle, enhancedRandomArticleBegin, matchDisambig, mw;

if (typeof enhancedRandomArticle === "undefined" || enhancedRandomArticle === null) {
  enhancedRandomArticle = {};
}

if (typeof unsafeWindow !== 'undefined') {
  addPortletLink = unsafeWindow.addPortletLink;
  mw = unsafeWindow.mw;
}

enhancedRandomArticleBegin = function() {

  /*
  		DEFAULT SETTINGS
  		
  		enhancedRandomArticle = { patterns: [], showDisambiguationPages: false, showStubs: false }
  		
  		enhancedRandomArticle = {}
  		enhancedRandomArticle.patterns = []
  		enhancedRandomArticle.showDisambiguationPages = false
  		enhancedRandomArticle.showStubs = false
   */
  if (enhancedRandomArticle == null) {
    enhancedRandomArticle = {};
  }
  if (enhancedRandomArticle.patterns == null) {
    enhancedRandomArticle.patterns = [];
  }
  if (enhancedRandomArticle.showDisambiguationPages == null) {
    enhancedRandomArticle.showDisambiguationPages = false;
  }
  if (enhancedRandomArticle.showStubs == null) {
    enhancedRandomArticle.showStubs = false;
  }
  return $.get(mw.config.get('wgScriptPath') + '/api.php', {
    action: 'query',
    list: 'random',
    rnnamespace: 0,
    format: 'json',
    rnlimit: 10
  }, eRCreateArticleList);
};

eRCreateArticleList = function(obj) {
  var article, articles, articlesArray, _i, _len;
  articles = obj.query.random;
  articlesArray = [];
  for (_i = 0, _len = articles.length; _i < _len; _i++) {
    article = articles[_i];
    articlesArray.push(article.title);
  }
  return $.get(mw.config.get('wgScriptPath') + '/api.php', {
    action: 'query',
    prop: 'revisions',
    rvdir: 'older',
    rvprop: 'content',
    titles: articlesArray.join('|'),
    format: 'json'
  }, eRCheckMatches);
};

matchDisambig = function(possiblePatterns, content) {
  var matchExpr, pattern, _i, _len;
  for (_i = 0, _len = possiblePatterns.length; _i < _len; _i++) {
    pattern = possiblePatterns[_i];
    matchExpr = new RegExp(pattern, 'i');
    if (content.match(matchExpr)) {
      return true;
    }
  }
  return false;
};

checkRandomMatch = function(userSettings, title, content) {
  var disambiguationMatches, eRA, matched, matchedPattern, pattern, _i, _len, _ref;
  eRA = userSettings;
  disambiguationMatches = ['disambig}}', 'dis}}', 'disambiguation}}', 'surname}}'];
  matched = false;
  matchedPattern = '';
  _ref = eRA.patterns;
  for (_i = 0, _len = _ref.length; _i < _len; _i++) {
    pattern = _ref[_i];
    if (title.match(pattern)) {
      matched = true;
      matchedPattern = pattern;
      break;
    }
  }
  if (!eRA.patterns.length && eRA.showDisambiguationPages && eRA.showStubs) {
    console.log(1);
    matched = true;
  }
  if (matched && !eRA.showDisambiguationPages && matchDisambig(disambiguationMatches, content)) {
    matched = false;
  } else if (!eRA.patterns.length && !eRA.showDisambiguationPages && !matchDisambig(disambiguationMatches, content)) {
    console.log(2);
    matched = true;
  }
  if (matched && !eRA.showStubs && content.match(/stub}}/i)) {
    matched = false;
  } else if (!eRA.patterns.length && !eRA.showStubs && !content.match(/stub}}/i)) {
    console.log(3);
    matched = true;
  }
  return matched;
};

eRCheckMatches = function(obj) {
  var article, articles, content, eRA, matched, page, title, value, _i, _len, _ref;
  articles = [];
  _ref = obj.query.pages;
  for (page in _ref) {
    value = _ref[page];
    articles.push(value);
  }
  eRA = enhancedRandomArticle;
  if (typeof eRA.patterns === 'string') {
    eRA.patterns = [eRA.patterns];
  }
  for (_i = 0, _len = articles.length; _i < _len; _i++) {
    article = articles[_i];
    content = article['revisions'][0]['*'];
    title = article['title'];
    matched = checkRandomMatch(eRA, title, content);
    if (matched) {
      window.location = '/wiki/' + title;
      return;
    }
  }
  return alert("ENHANCED RANDOM ARTICLES\n\nAn article that meets all of your criteria could not be found. Please try again.\nAlso, perhaps consider using less restrictive criteria.\n\nKeep in mind that only 10 articles are retrieved each time this script is activated,\nso there's a good chance that most of them won't match your criteria if it's too strict.");
};

addEnhancedRandomArticlePortletLink = function() {
  var node, nodeLink, randomPageLink;
  if ($('#p-navigation').length) {
    mw.util.addPortletLink('p-navigation', '#', 'Enhanced random', 't-enhanced-random-article', 'Show a random article, with enhanced settings', '', '#n-randompage');
    $('#t-enhanced-random-article').on('click', function(event) {
      event.preventDefault();
      return enhancedRandomArticleBegin();
    });
    if ($('#n-randompage').length) {
      randomPageLink = $('#n-randompage').children().eq(0);
      randomPageLink.attr('accesskey', null);
    }
    node = $('#t-enhanced-random-article');
    nodeLink = node.children().eq(0);
    nodeLink.attr('accesskey', 'x');
    return nodeLink.attr('title', nodeLink.attr('title') + ' [ctrl-x]');
  }
};

$(addEnhancedRandomArticlePortletLink);

if (typeof unsafeWindow !== 'undefined') {
  unsafeWindow.checkRandomMatch = checkRandomMatch;
  unsafeWindow.enhancedRandomArticle = enhancedRandomArticle;
  unsafeWindow.enhancedRandomArticleBegin = enhancedRandomArticleBegin;
  unsafeWindow.eRCheckMatches = eRCheckMatches;
  unsafeWindow.eRCreateArticleList = eRCreateArticleList;
  unsafeWindow.matchDisambig = matchDisambig;
}