<?php

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
// Show all errors except deprecation notices (these come from vendor libraries
// that aren't yet typed for newer PHP versions). Long-term fix: update
// dependencies to versions compatible with your PHP runtime.
error_reporting(E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED);

if (!isset($baseDir)) {
	$baseDir = $_SERVER['DOCUMENT_ROOT'];
}

require_once $baseDir . '/../scripts/session_functions.php';

ini_wkvs_session();

check_user_permission('wk_leitung');

verify_csrf();

$type = 'wkl';

$dbconnection = require $baseDir . '/../scripts/db/db-verbindung-script.php';

if ($dbconnection['success'] !== true){
    echo 'Critical DB Error.';
    exit;
}

require $baseDir . '/../scripts/db/db-functions.php';
require $baseDir . '/../scripts/db/db-tables.php';

$allGeraete = db_select($mysqli, $tableGeraete, "id, name, start_index", "", [], "start_index ASC");
$allAbt = db_select($mysqli, $tableAbt, "name, id", "", [], "name ASC");

$maxTurnerinnenGruppe = 8;

// $allGeraete[] = ['name' => 'null', 'id' => 'null'];
// $allAbt[] = ['name' => 'null', 'id' => 'null'];

/*$stmt = $mysqli->prepare("
    SELECT
        t.id,
        t.programm,
        t.verein,
        GROUP_CONCAT(ta.id SEPARATOR ', ') AS abt_table_id
    FROM $tableTurnerinnen t
    LEFT JOIN $tableTurnerinnenAbt ta ON ta.turnerin_id = t.id
    GROUP BY t.id, t.programm, t.verein
    ORDER BY t.id DESC
");

$stmt->execute();


$result = $stmt->get_result();
$allTurnerinnen = $result->fetch_all(MYSQLI_ASSOC);

$stmt->close();

print_r($allTurnerinnen);*/


$allTurnerinnen = db_select($mysqli, $tableTurnerinnen, "id, programm, verein, name" , "", [], "programm ASC");

$grouped = [];

foreach ($allTurnerinnen as $t) {
    $sanitasedprogramm = str_replace(['-kader'], '', strtolower($t['programm']));
    $grouped[$sanitasedprogramm][$t['verein']][] = $t;
}

function getMinKey(array $array): string|int {
    return array_search(min($array), $array, true);
}

function arrayRiegeneiteilung($allturnerinnen, $maxTurnerinnenGruppe, $allGeraete) {
    $indabt = 1;
    $arrayAutoRiegeneinteilung = [];
    foreach ($allturnerinnen as $prog => $vereine) {
        // ABTEILUNG BERECHNEN
        $countturterinnenprog = 0;
        foreach ($vereine as $verein => $turnerinnen) {
            foreach ($turnerinnen as $ind => $turnerin) {
                $countturterinnenprog++;
                $abt = intdiv($countturterinnenprog, $maxTurnerinnenGruppe * count($allGeraete)) + $indabt;
                $allturnerinnen[$prog][$verein][$ind]['abt'] = $abt;
                $arrayAbt[$abt][$verein][] = $turnerin;
            }
            
        }

        $indabt += intdiv($countturterinnenprog - 1, $maxTurnerinnenGruppe * count($allGeraete)) + 1;
    }

    foreach ($arrayAbt as $abt => $vereine) {

        // AUSGLEICHEN DER GRUPPEN
        $arrayAbt = [];
        $arrayGruppen = [];
        foreach ($allGeraete as $geraet) {
            $arrayGruppen[$geraet['id']] = 0;
        }

        $turnerinnenCount = 0;

        foreach ($vereine as $verein => $turnerinnen) {
            $turnerinnenCount += count($turnerinnen);
        }

        foreach ($vereine as $verein => $turnerinnen) {

            if (count($turnerinnen) > $maxTurnerinnenGruppe || count($turnerinnen) > $turnerinnenCount / count($allGeraete)) {
                
                if (count($turnerinnen) > $turnerinnenCount / count($allGeraete)) {
                    $maxTurnerinnenGruppeTemp = ceil($turnerinnenCount / count($allGeraete));
                } else {
                    $maxTurnerinnenGruppeTemp = $maxTurnerinnenGruppe;
                }
                // AUFTEILEN IN MEHRERE GRUPPEN
                $chunks = array_chunk($turnerinnen, $maxTurnerinnenGruppeTemp);
                foreach ($chunks as $chunk) {

                    $minKey = getMinKey($arrayGruppen);

                    $arrayGruppen[$minKey] += count($chunk);

                    foreach ($chunk as $ind =>$turnerin) {
                        $arrayAutoRiegeneinteilung[$abt][$minKey][] = $turnerin;
                    }
                }
                continue;
            }

            $minKey = getMinKey($arrayGruppen);

            $arrayGruppen[$minKey] += count($turnerinnen);

            foreach ($turnerinnen as $ind =>$turnerin) {
                $arrayAutoRiegeneinteilung[$abt][$minKey][] = $turnerin;
            }
            
        }
    }

    
    foreach ($arrayAutoRiegeneinteilung as $indAbt => $abt) {
        foreach ($abt as $indGeraet => $geraet) {
            foreach ($geraet as $indTurnerin => $turnerin) {
                $arrayAutoRiegeneinteilung[$indAbt][$indGeraet][$indTurnerin]['turnerin_index'] = $indTurnerin + 1;
            }
        }
    }
    

    return $arrayAutoRiegeneinteilung;
}
    
$arrayAutoRiegeneinteilung = arrayRiegeneiteilung($grouped, $maxTurnerinnenGruppe, $allGeraete);


$stmt = $mysqli->prepare("DELETE FROM $tableTurnerinnenAbt");
$stmt->execute();
$stmt->close();

$stmt = $mysqli->prepare("DELETE FROM $tableAbt");
$stmt->execute();
$stmt->close();


foreach ($arrayAutoRiegeneinteilung as $indAbt => $abt) {

    $stmt = $mysqli->prepare("INSERT INTO $tableAbt (name) VALUES (?)");
    $stmt->bind_param("s", $indAbt);
    $stmt->execute();
    $idAbt = $stmt->insert_id;
    $stmt->close();

    foreach ($abt as $indGeraet => $geraet) {
        foreach ($geraet as $indTurnerin => $turnerin) {
            $stmt = $mysqli->prepare("INSERT INTO $tableTurnerinnenAbt (turnerin_id, abteilung_id, geraet_id, turnerin_index) VALUES (?, ?, ?, ?)");
            $stmt->bind_param("ssss", $turnerin['id'], $idAbt, $indGeraet, $turnerin['turnerin_index']);
            $stmt->execute();
            $stmt->close();
        }
    }
}

return http_response_code(201);


/*foreach ($grouped as $ind => $g) {
    echo $ind;
    foreach ($g as $verein) {
        foreach ($verein as $turnerin) {
            echo '<div class="riegeneinteilung_turnerin_row" data-turnerin_id="' . $turnerin['id'] . '">';
                echo '<div class="riegeneinteilung_turnerin_info">';
                    echo '<span class="riegeneinteilung_turnerin_name">' . htmlspecialchars($turnerin['name']) . '</span>';
                    echo '<span class="riegeneinteilung_turnerin_verein">(' . htmlspecialchars($turnerin['verein']) . ')</span>';
                    echo '<span class="riegeneinteilung_turnerin_verein">(' . htmlspecialchars($turnerin['abt']) . ')</span>';
                    echo '<span class="riegeneinteilung_turnerin_verein">(' . htmlspecialchars($turnerin['geraet_id']) . ')</span>';
                echo '</div>';

            echo '</div></div>';
        }
    }
    echo '<br><br>';
}

foreach ($arrayAutoRiegeneinteilung as $ind => $abt) {

    echo '<br>ABT:' . $ind;
    foreach ($abt as $g) {
        echo '<br>GERÄT';
        foreach ($g as $turnerin) {
            echo '<div class="riegeneinteilung_turnerin_row" data-turnerin_id="' . $turnerin['id'] . '">';
                echo '<div class="riegeneinteilung_turnerin_info">';
                    echo '<span class="riegeneinteilung_turnerin_name">' . htmlspecialchars($turnerin['name']) . '</span>';
                    echo '<span class="riegeneinteilung_turnerin_verein">(' . htmlspecialchars($turnerin['verein']) . ')</span>';
                    echo '<span class="riegeneinteilung_turnerin_verein">(' . htmlspecialchars($turnerin['turnerin_index']) . ')</span>';
                    echo '<span class="riegeneinteilung_turnerin_verein">(' . htmlspecialchars($turnerin['programm']) . ')</span>';
                echo '</div>';

            echo '</div></div>';
        }
    }
    echo '<br><br>';
}

print_r($arrayAutoRiegeneinteilung);*/