<?php

namespace App\SQLLogin;

use App\SQLLogin\Exception\NullDataToFetchException;

class SQLLoginRequest
{
    public const DATA_TO_FETCH = 'data_to_fetch';
    public const LOGIN_COLUMN_NAME = 'login_column_name';
    public const SALT_COLUMN_NAME = 'salt_column_name';
    public const PASSWORD_COLUMN_NAME = 'password_column_name';
    public const PASSWORD_NEED_UPGRADE = 'password_need_upgrade';
    public const TABLE_NAME = 'table_name';
    public const SUBJECT_REWRITE_EXPRESSION = 'subject_rewrite_expression';

    private array $config;
    private string $dsn;
    private string $user;
    private string $password;

    public function __construct(string $dsn, string $user, string $password, array $config = [])
    {
        $this->config = $config;
        $this->dsn = $dsn;
        $this->user = $user;
        $this->password = $password;
    }

    public function getDatabaseDsn(): string
    {
        return $this->dsn;
    }

    public function getDbUser(): string
    {
        return $this->user;
    }

    public function getDbPassword(): string
    {
        return $this->password;
    }

    public function getLoginColumnName(): string
    {
        return $this->config[self::LOGIN_COLUMN_NAME];
    }

    public function getPasswordColumnName(): string
    {
        return $this->config[self::PASSWORD_COLUMN_NAME];
    }

    public function getSaltColumnName(): ?string
    {
        return $this->config[self::SALT_COLUMN_NAME];
    }

    public function getTableName(): string
    {
        return $this->config[self::TABLE_NAME];
    }

    public function getDataToFetch(): array
    {
        return $this->config[self::DATA_TO_FETCH];
    }

    public function getSubjectRewriteExpression(): ?string
    {
        return $this->config[self::SUBJECT_REWRITE_EXPRESSION];
    }

    private function getDataFields(): array
    {
        if (!$this->config[self::DATA_TO_FETCH]) {
            throw new NullDataToFetchException();
        }

        return $this->config[self::DATA_TO_FETCH];
    }

    /**
     * Construction de la string pour la requête préparée selon la configuration yaml
     * intègre la récupération du mot de passe hashé, du salt et de besoin d'upgrade de la méthode de hashage
     */
    private function getPasswordFields(): array
    {
        $fields[] = $this->getPasswordColumnName();
        if (!empty($this->getSaltColumnName())) {
            $fields[] = $this->getSaltColumnName();
        }

        return $fields;
    }

    /**
     * Construction de la string pour la requête préparée selon la configuration yaml
     * intègre la récupération du mot de passe hashé, du salt et de besoin d'upgrade de la méthode de hashage
     */
    public function getDatasRequest(): string
    {
        $fields = join(',', array_merge($this->getPasswordFields(), $this->getDataFields()));

        return 'SELECT '.$fields.' FROM '.$this->getTableName().' WHERE LOWER('.$this->getLoginColumnName().') = LOWER(:'.$this->getLoginColumnName().');';
    }
}