<?php 
setlocale(LC_ALL, "de_DE@euro", "de_DE", "de", "ge");
set_include_path(get_include_path() . PATH_SEPARATOR . "./lib/");

// start a session
session_start();

// Configs
require_once("config/participo.php");
require_once $config['basePath'] . "/config/cwsvJudo.config.php";

// Libs
require_once("participoLib/user.php");

participo::init($cwsvJudoConfig);

$pmelo = new PmElo();

class PmElo{
    function __construct()
    {
        // starting/continuing a session
        session_start();

        // create 'pmelo' section in the sessions data
        if(!array_key_exists('pmelo', $_SESSION)){
            $_SESSION['pmelo'] = [];
        }        
        // - data storage for id-s of chosen fighters
        if(!array_key_exists('fighterIds', $_SESSION)){
            $_SESSION['pmelo']['fighterIds'] = null; 
        }

        // check for action in post data
        if(array_key_exists('pmelo', $_POST)){
            if(array_key_exists('fighterIds', $_POST['pmelo'])){
                $this->fighters = array_map('User::loadFromDb', $_POST['pmelo']['fighterIds']);
            }
        }

        // load/recreate ranking data
        if(!is_file(self::$pmeloJson)){
            $this->log['info'][] = "Couldn't find `".self::$pmeloJson."`. Create a new one!";
            file_put_contents(self::$pmeloJson, json_encode([]));
        }

        // init members
        $this->trainees = self::getTrainees();
        $this->var_log(array_map(function($user){return $user->getFirstName();},$this->trainees), "trainees from db");
        $this->rankings = self::createRankings();

    }

    // load all active trainees into a id=>User assoc array
    public static function getTrainees(){
        $traineeList = array_map('User::fromDbArray', User::dbSelectWithAttribute(4));
        $traineeAssocArray = [];
        foreach($traineeList as $trainee){
            $traineeAssocArray[$trainee->getId()] = $trainee;
        }
        return $traineeAssocArray;
    }

    // load ranking from json file
    public static function loadRankings(){
        return json_decode(file_get_contents(self::$pmeloJson));
    }
    
    // save a ranking to json file
    public static function saveRankings(array $rankings){
        file_put_contents(self::$pmeloJson, json_encode($rankings));
    }

    function var_log($variable, string $prefix=null, string $logChannel='info'){
        if(!in_array($logChannel, ['info', 'warning', 'error'])){
            $logChannel='info';
        }
        $prefix = (!empty($prefix) ? $prefix.": " : "");
        $this->log[$logChannel][]=$prefix.var_export($variable, true);
    }

    public function createRankings(){
        // load the last state of the ranking
        $loadedRanking = self::loadRankings();
        $this->var_log($loadedRanking,"ranking");

        // check if the ranked trainees still are in training
        $cleanRanking = [];
        $toBeInsertedTrainees = $this->trainees;
        foreach($loadedRanking as $rank=>$id){
            if(array_key_exists($id, $this->trainees)){
                $cleanRanking[] = $id;
                // id of the not in the ranking, we have to insert
                unset($toBeInsertedTrainees[$id]);
            }
        }
        
        $newTraineesIds = array_map(function($u){return $u->getId();},$toBeInsertedTrainees);
        usort(
            $newTraineesIds
            , function($lhs, $rhs){
                return $this->trainees[$lhs]->getStrBirthday() < $this->trainees[$rhs]->getStrBirthday() ? -1 : ($this->trainees[$lhs]->getStrBirthday() > $this->trainees[$rhs]->getStrBirthday() ? 1 : 0);
            }
        );
        $this->var_log(array_map(function($id){return $this->trainees[$id]->getStrBirthday();},$newTraineesIds), "newTrainieesIdsByAge");
        $this->var_log($newTraineesIds, "newTrainieesIdsByAge");
        $this->var_log(array_map(function($user){return $user->getFirstName();}, $toBeInsertedTrainees), "newTrainees");

        // insert new trainees in the ranking
        // foreach($this->trainees as $trainee){
        //     if(empty($this->rankings)){

        //     }
        // }
    }

    public $log = ['error'=>[], 'warning'=>[], 'info'=>[]];
    public $fighters = null;
    public $trainees = null;
    // list of id-s in the order of the current ranking
    public $rankings = null;

    static $pmeloJson="pmeloRanking.json";
}