define(['_'], function(_) {
    var resultParser = {};

    resultParser._addJSDateToResult = function(res){
        var date = res.date.split('/');
        var time = _.isString(res.time) ? res.time.split(':'): [0, 0];
        res.jsDate = new Date(
            Number(date[0]),
            Number(date[1]) - 1,
            Number(date[2]),
            Number(time[0]),
            Number(time[1])
        );
        return res;
    };

    resultParser._setCanonicalPoints = function(res){
      if(!_.isNumber(res.home_points) && _.isNumber(_.get(res, res.home))){
        res.home_points = res[res.home];
      }
      if(!_.isNumber(res.away_points) && _.isNumber(_.get(res, res.away))){
        res.away_points = res[res.away];
      }
      return res;
    }

    resultParser.parseResults = function(rawResults){
        rawResults = _.map(rawResults, resultParser._setCanonicalPoints);
        rawResults = _.map(rawResults, resultParser._addJSDateToResult);
        rawResults = _.map(rawResults, resultParser._addCustomStyle);
        return rawResults;
    };

    resultParser.getNightGames = function(rawResults){
        var ret = {};
        _.each(resultParser.parseResults(rawResults), function(res){
            if(_.has(ret, res.date)){
                ret[res.date].push(res);
            }else{
                ret[res.date] = [res];
            }
        });
        return _.map(ret, function(games, date){
            return resultParser._addJSDateToResult({date: date, games: games});
        });
    };

    resultParser._getAllTeams = function(rawResults){
        var homeTeams = _.map(rawResults, 'home');
        var awayTeams = _.map(rawResults, 'away');
        return _.uniq(_.concat(homeTeams, awayTeams));
    };

    resultParser._getWinner = function(res){
        if(res.home_points > res.away_points){
            return res.home;
        }
        if(res.home_points < res.away_points){
            return res.away;
        }
    };

    resultParser._hasWon = function(res, team){
        return resultParser._getWinner(res) == team;
    };

    resultParser._hasLost = function(res, team){
        return !resultParser._isDraw(res) && resultParser._getWinner(res) != team;
    };

    resultParser._isDraw = function(res){
        return res.home_points == res.away_points;
    };

    resultParser._getPointsFor = function(res, team){
        if(res.home == team){
            return res.home_points;
        }
        return res.away_points;
    };

    resultParser._getPointsForOpponent = function(res, team){
        if(res.home == team){
            return res.away_points;
        }
        return res.home_points;
    };

    resultParser._getPointsForGame = function(res, team){
        if(resultParser._hasWon(res, team)){
            return 2;
        }
        return resultParser._isDraw(res) ? 1: 0;
    };

    resultParser._getTeamStats = function(rawResults, team){
        var ret = {
            team: team, gamePlayed: 0, victories: 0, points: 0,
            defeats: 0, draws: 0, pointsFor: 0, pointsAgaint: 0};
        _.each(rawResults, function(res){
            if((team != res.home && team != res.away) || !_.isNumber(res.home_points)){
                return;
            }
            ret.gamePlayed += 1;
            ret.victories += resultParser._hasWon(res, team) ? 1: 0;
            ret.defeats += resultParser._hasLost(res, team) ? 1: 0;
            ret.draws += resultParser._isDraw(res) ? 1: 0;
            ret.pointsFor += resultParser._getPointsFor(res, team);
            ret.pointsAgaint += resultParser._getPointsForOpponent(res, team);
            ret.points += resultParser._getPointsForGame(res, team);
        });
        return ret;
    };

    resultParser._removeTemporaryResults = function(rawResults){
        return _.filter(rawResults, function(rawResult){
            return !rawResult.temporary;
        });
    };

    resultParser._isValidGame = function(game){
        return !game.rain && ! game.practice;
    };

    resultParser.getStats = function(rawResults){
        rawResults = _.filter(rawResults, resultParser._isValidGame);
        rawResults = _.map(rawResults, resultParser._setCanonicalPoints);
        var allTeams = resultParser._getAllTeams(resultParser._removeTemporaryResults(rawResults));
        var getTeamStats = _.partial(resultParser._getTeamStats, rawResults);
        return _.map(allTeams, getTeamStats);
    };

    return resultParser;
});