<?php
namespace App\Library;
use NilPortugues\Sql\QueryBuilder\Builder\GenericBuilder;

final class ContingentManager
{
    private static ?ContingentManager $instance;
    private ?GenericBuilder $builder;
    private function __construct()
    {
        $this->builder = new GenericBuilder();
    }

    public static function getInstance() : ContingentManager
    {
        self::$instance ??= new self();
        return self::$instance;
    }

    public function getSites(Database $db): array
    {
        // select kod as org_id, site from niimko.s_vuzes
        // where ootype = 'vuz' and deleted = 'n' and fake = 'n'
        $params = ['vuz', 'n', 'n', 'RU'];
        $query = $this->builder->select()
            ->setTable('s_vuzes')
            ->setColumns(['org_id' => 'kod', 'site'])
            ->where('AND')
            ->equals('ootype', 'vuz')
            ->equals('deleted', 'n')
            ->equals('fake', 'n')
            ->equals('country', 'RU')
            ->end();
        $sql = $this->builder->write($query);
        $sites = $db->selectQuery($sql, $params);
        
        return $sites;
    }

    public function insertContingent(Database $db, array $contingent) : void
    {
        $params = ['spec_code', 'spec_name', 'edu_level', 'edu_forms', 'contingent', 'spec_id', 'org_id'];
        $sql = "insert into sveden_education_contingent"
            ."(". implode(',', $params) .") values";
        for ($i = 0; $i < count($contingent); $i++) {
            $sql .= "(";
            foreach ($contingent[$i] as $key => $value) {
                $sql .= ":$key". ($i+1).",";
            }
            $sql = substr_replace($sql,"),", -1);
        }
        $sql = substr_replace($sql,"", -1);
        
        $db->insertQuery($sql, $contingent);
    }

    public function getSpecializations(Database $db) : array
    {
        // select id, kod from niimko.s_specs where oopkodes = 'gos3p'
        $params = ['gos3p'];
        $query = $this->builder->select()
            ->setTable('s_specs')
            ->setColumns(['id', 'kod'])
            ->where()
            ->equals('oopkodes','gos3p')
            ->end();
        $sql = $this->builder->write($query);
        $specializations = $db->selectQuery($sql, $params);
        
        return $specializations;
    }

    public function getOrgs(Database $db) : array
    {
        $sql = 'SELECT DISTINCT org_id FROM sveden_education_contingent';
        $org = $db->selectQuery($sql);
        $orgs = [];
        foreach ($org as $o) {
            $orgs[] = $o['org_id'];
        }
        return $orgs;
    }

    public function buildBaseUri(string $url): string
    {
        // Строит -> https://<base_uri>
        if (strpos($url,'https://') === false && strpos($url,'http://') === false) {
            $url = "http://$url";
        }

        return $url;
    }

    public function addSpecId(array &$contingent, array $specializations) : void
    {
        foreach ($contingent as $key => $con) {
            $buf = null;
            $needle = $con['spec_code'];
            foreach ($specializations as $spec) {
                if ($needle == $spec['kod']) {
                    $buf = $spec['id'];
                }
            }
            $contingent[$key]['spec_id'] = $buf;
            unset($buf);
        }
    }

    public function addOrgId(array &$contingent, int $orgId) : void
    {
        for($i = 0; $i < count($contingent); $i++) {
            $contingent[$i]['org_id'] = $orgId;
        }
    }

    public function checkContingent(array $contingent) : bool
    {
        $count = 0;
        foreach ($contingent as $value) {
            $count += $value['contingent'];
        }
        return $count ? true : false;
    }

    public function getExceptionsHtml(string $filename) : array
    {
        $errorSites = [];
        $array = file($filename);
        for ($i = 0; $i < count($array); $i++) {
            $arr = explode(' ', $array[$i]);
            $errorSites[] = $arr[2];
        }
        return $errorSites;
    }

    public function getExceptionsHttpCurl(string $filename) : array
    {
        $array = file($filename);
        $orgHttpError = [];
        foreach ($array as $str) {
            $data = explode (' ', $str);
            if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/", $data[0])
                && $data[3] != PHP_EOL) {
                $orgHttpError[] = $data[2];
                // $orgHttpError[] = ['org_id' => $data[2], 'site' => $data[3]];
            }
        }
        $orgHttpError = array_unique($orgHttpError);
        sort($orgHttpError);
        return $orgHttpError;
    }
}