<?php

namespace App\Leagues;

use Illuminate\Database\Eloquent\Model;
use App\Leagues\League;
use App\Leagues\LeagueMember;

use App\User;
use App\Round;
use App\Season;
use App\Tipp;

use Log;
use DB;

class Match extends Model
{
    protected $table ='leagues_matches';
    protected $fillable = [
        'id','league_id','round_id','user1_id','user2_id'
    ];

    // https://en.wikipedia.org/wiki/Round-robin_tournament
    public static function createMatchups()
    {   Log::info("Match::Creating matchups()");
        $currentSeason = Season::getCurrent();
        $leagues = League::where('season_id', '=', $currentSeason->id)->get();
        foreach ($leagues as $league) {
            if ($league->rank == League::RANK_QUALIFICATION) {
                $rounds = Round::where('id','>=',$league->start_round_id)->get();
                $roundNr=1;
                $neededRoundCount = Match::getNumberOfNeededRounds($league->id);

                $allPairings=Match::getAllPairings($league->id, sizeof($rounds));
                Log::info("all pairings:");
                Log::info($allPairings);
                foreach ($rounds as $round) {
                    $pairings = $allPairings[$roundNr];
                    // Save pairings
                    foreach($pairings as $pair) {
                        Log::info("Saving match. ".$pair[0]." vs ".$pair[1]." roundid=".$round->id);
                        $newMatch = Match::create([
                            'league_id' => $league->id,
                            'round_id' => $round->id,
                            'user1_id' => $pair[0],
                            'user2_id' => $pair[1]
                        ]);
                        $newMatch->save();
                    }
                    $roundNr += 1;
                    if ($roundNr > $neededRoundCount) break;
                }

            }
        }
    }

    public static function hasMatched($user1_id, $user2_id, $league_id)
    {
        $matches = DB::table('leagues_matches')
            ->where('league_id', '=', $league_id)
            ->where('user1_id', '=', $user1_id)
            ->where('user2_id', '=', $user2_id)
            ->get();
        if (sizeof($matches)) {
            return true;
        }

        $matches = DB::table('leagues_matches')
            ->where('league_id', '=', $league_id)
            ->where('user1_id', '=', $user2_id)
            ->where('user2_id', '=', $user1_id)
            ->get();
        if (sizeof($matches)) {
            return true;
        }

        return false;
    }


    // Selektiert nur die "Heimspiele"
    public static function getMatches($user_id, $league_id) {
        $matches = DB::table('leagues_matches')->where('league_id', '=', $league_id)->where('user1_id','=',$user_id)->get();
        return $matches;
    }


    public static function getLeagueMatches($league_id) {
        //$matches = Match::where('league_id','=',$league_id)->orderBy('round_id')->get();
        $matches = DB::table('leagues_matches')->where('league_id','=',$league_id)->orderBy('round_id')->get();
        $season = Season::getCurrent();

        $roundnames = Round::getNames();
        $usernames  = User::getNames();
        foreach($matches as $match) {
            $match->round_name = $roundnames[$match->round_id];
            $match->user1_name = $usernames[$match->user1_id];
            $match->user2_name = $usernames[$match->user2_id];
            // Punktauswertung in Match::getMatchResults($leagueId, $maxRoundId);
        }
        return $matches;
    }


    public static function getAllPairings($leagueId, $roundCount) {
        $members = LeagueMember::getMembers($leagueId);
        shuffle($members);
        //error_log("Number of members:".sizeof($members));
        $pairingCount = Match::getNumberOfPairingsPerRound($leagueId);

        $all = array();

        for ($currentRoundNr=1; $currentRoundNr<= $roundCount; $currentRoundNr++) {

            $roundRobin = array();
            foreach ($members as $userId) {
                array_push($roundRobin, $userId);
            }

            //error_log("RoundNr ".$currentRoundNr." Array start:");
            //error_log(implode(",",$roundRobin));

            $_roundNr = $currentRoundNr;
            while ($_roundNr >= 1) {
                // Round-Robin shift: First element stays, rest rotates
                $first = array_shift($roundRobin); // Erstes Element sichern & entfernen
                $last = array_pop($roundRobin);   // Letztes Element sichern & entfernen
                array_unshift($roundRobin, $last);   // Vorne einfügen
                array_unshift($roundRobin, $first); // Vorne einfügen
                $_roundNr--;
            }

            //error_log("RoundNr ".$currentRoundNr." Array end:");
            //error_log(implode(",",$roundRobin));

            $idx = 0;
            $slot = 0;
            $pairings = array();
            foreach ($roundRobin as $index => $userId) {
                $idx = $index;
                if ($index >= $pairingCount) {
                    $idx = 2 * $pairingCount - $index - 1;
                    $slot = 1;
                }
                $pairings[$idx][$slot] = $userId;
                error_log($idx.",".$slot." => ".$userId);
            }

            //error_log("Pairings for RoundNr ".$currentRoundNr.":");
            $strPairings="";
            //foreach($pairings as $pairing) {
                //error_log(">".$pairing[0].":".$pairing[1]);
                //$strPairings = $strPairings." ".$pairing[0].":".$pairing[1];
            //}
            //error_log($strPairings);
            //error_log("-------");

            $all[$currentRoundNr]=$pairings;

        }


        //foreach ($all as $roundNr => $pairings) {
        //    foreach ($pairings as $pairing)
            //error_log("round_".$roundNr.":user_".$pairing[0]."!:user_".$pairing[1]."!");
        //}
        //return null;
        return $all; // $all[$roundnr]= Array of Tuples ( UserId1, UserId2 )
    }

    public static function getNumberOfPairingsPerRound($leagueId) {
        $members = LeagueMember::getMembers($leagueId);
        $pairingsPerRound = intdiv(sizeof($members),2);
        if (sizeof($members)-$pairingsPerRound*2) {
            $pairingsPerRound+=1;
        }
        return $pairingsPerRound;
    }

    public static function getNumberOfNeededRounds($leagueId) {
        $members = LeagueMember::getMembers($leagueId);
        return sizeof($members)-1;
    }

    public static function getMatchResults($leagueId, $maxRoundId=-1) {
        $roundtipps = Tipp::getRoundTipps($maxRoundId);
        $roundtipps = $roundtipps["roundtipps"];
        $matches = Match::getLeagueMatches($leagueId, $maxRoundId);
        $season = Season::getCurrent();

        if ($maxRoundId==-1) { $maxRoundId = Round::getLastRoundId($season->id); }

        foreach($matches as $key => $match) {

            $user1_key = $match->round_id."_".$match->user1_id;
            $user2_key = $match->round_id."_".$match->user2_id;

            if (Round::isCompleted($match->round_id)) {

                $user1_score = $roundtipps[$user1_key]["rankscore"];
                $user2_score = $roundtipps[$user2_key]["rankscore"];

                $matches[$key]->user1_rankscore = $user1_score;
                $matches[$key]->user2_rankscore = $user2_score;

                //$matches[$key]->user1_hits = $roundtipps[$user1_key][]

                if ($user1_score > $user2_score) {
                    $matches[$key]->user1_league_score = 3;
                    $matches[$key]->user2_league_score = 0;

                }
                else if ($user1_score < $user2_score){
                    $matches[$key]->user1_league_score = 0;
                    $matches[$key]->user2_league_score = 3;
                } else {
                    $matches[$key]->user1_league_score = 1;
                    $matches[$key]->user2_league_score = 1;
                }

            } else { // Untipped/future round
                $matches[$key]->user1_league_score = 0;
                $matches[$key]->user2_league_score = 0;
                $matches[$key]->user1_rankscore = -1;
                $matches[$key]->user2_rankscore = -1;
            }

        }
        return $matches;
    }

    public static function getMatchResultsForUser($userId, $maxRoundId=-1) {
        $season  = Season::getCurrent();
        $leagues = League::where('season_id','=',$season->id)->get();

        $matchList=array();

        foreach($leagues as $league) {
            $member=LeagueMember::where('league_id','=',$league->id)->where('user_id','=',$userId)->first();
            if ($member) {
                // $userId ist member dieser League
                $matchResults = Match::getMatchResults($league->id,$maxRoundId);
                foreach($matchResults as $result) {
                    if ($result->user1_id == $userId || $result->user2_id==$userId) {
                        array_push($matchList, $result);
                    }
                }
            }
        }

        return $matchList;

    }

}