var Show = require('../models/Show');
var config = require('../config.js');

module.exports = {
	getShows: function(req, res) {
		// we get how many elements we have
    // then we return the page array
    Show.count({}, function (err, count) {
      var pages = Math.round(count / config.pageSize);
      var docs = [];
      
      for (var i = 1; i < pages + 1; i++)
        docs.push("shows/"+i);
               
      res.json(docs);
    });
	},
  getPage: function(req, res) {
    var page = req.params.page - 1;   
    var offset = page * config.pageSize;

    // support older version
    if (req.params.page == 'all') {

      Show.find({num_seasons: { $gt: 0 }}).sort({ title: -1 }).exec(function (err, docs) {
        res.json(docs);
      });  

    } else {

      var query = {num_seasons: { $gt: 0 }};
      var data = req.query;
      
      if (!data.order) 
      	data.order = -1;
      	
      var sort = {"rating.votes":  data.order, "rating.percentage":  data.order}
      // filter elements

      if (data.keywords) {
        var words = data.keywords.split(" ");
        var regex = data.keywords.toLowerCase();
        if(words.length > 1) {
          var regex = "^";
          for(var w in words) {
            regex += "(?=.*\\b"+RegExp.escape(words[w].toLowerCase())+"\\b)";
          }
          regex += ".+";
        }
        query = {title: new RegExp(regex,"gi"),num_seasons: { $gt: 0 }};
      }

      if (data.sort) {
        if(data.sort == "year") sort = {year: data.order};
        if(data.sort == "updated") sort = {"episodes.first_aired":  data.order};
        if(data.sort == "name") sort = {title:  (data.order * -1)};
      }

      if(data.genre && data.genre != "All") {
        query = {genres : data.genre,num_seasons: { $gt: 0 }}
      }

      // paging
      Show.find(query,{ _id: 1, imdb_id: 1, tvdb_id:1, title:1, year:1, images:1, slug:1, num_seasons:1, last_updated:1, ratings:1 }).sort(sort).skip(offset).limit(config.pageSize).exec(function (err, docs) {
        res.json(docs);
      });

    }
  },
  getShow: function(req, res) {
    Show.find({imdb_id: req.params.id}).limit(1).exec(function (err, docs) {
        if(Array.isArray(docs)) docs = docs[0];
        res.json(docs);
    });
  },
  search: function(req, res) {
    var keywords = new RegExp(RegExp.escape(req.params.search.toLowerCase()),"gi");
    Show.find({title: keywords,num_seasons: { $gt: 0 }}).sort({ title: -1 }).limit(config.pageSize).exec(function (err, docs) {
      res.json(docs);
    });
  },
  searchPage: function(req, res) {
    var page = req.params.page - 1;
    var offset = page * config.pageSize;    
    var keywords = new RegExp(RegExp.escape(req.params.search.toLowerCase()),"gi");

    Show.find({title: keywords,num_seasons: { $gt: 0 }}).sort({ title: -1 }).skip(offset).limit(config.pageSize).exec(function (err, docs) {
      res.json(docs);
    });
  },
  getSince: function(req, res) {
    var since = req.params.since;
    if(req.query.full) {
      Show.find({last_updated : {$gt: parseInt(since)},num_seasons: { $gt: 0 }}, function(err, docs) {
          res.json(docs);
      });
    } else {
      Show.count({last_updated : {$gt: parseInt(since)},num_seasons: { $gt: 0 }}, function (err, count) {
        // how many page?
        var pages = Math.round(count / config.pageSize);
        
        var docs = [];
        for (var i = 1; i < pages + 1; i++)
            docs.push("shows/update/" + since + "/" + i);
                 
        res.json(docs);
      });
    }
  },
  getSincePage: function(req, res) {
    var page = req.params.page - 1;   
    var offset = page * config.pageSize;      
    var since = req.params.since;

    Show.find({last_updated : {$gt: parseInt(since)},num_seasons: { $gt: 0 }}).sort({ title: -1 }).skip(offset).limit(config.pageSize).exec(function (err, docs) {
      res.json(docs);
    });
  },
  getLastUpdated: function(req, res) {
    Show.find({num_seasons: { $gt: 0 }}).sort({ last_updated: -1 }).limit(config.pageSize).exec(function (err, docs) {
      res.json(docs);
    });
  },
  getLastUpdatedPage: function(req, res) {
    var page = req.params.page - 1;   
    var offset = page * config.pageSize;
    Show.find({num_seasons: { $gt: 0 }}).sort({ last_updated: -1 }).skip(offset).limit(config.pageSize).exec(function (err, docs) {
      res.json(docs);
    });
  },
}