<?php

namespace App\Domain;

use App\Domain\Recettes\Recette;
use App\Kernel;
use PDO;

abstract class Repository {

    /**
     * Instancie des éléments de cette classe par rapport au repository.
     * @return class-string
     */
    abstract public static function getEntity(): string;

    /**
     * Doit retourner une liste du type :
     * ['table' => '', 'columns' => [ ...Liste des colonnes dans la BDD ] ].
     * @return array
     */
    abstract public static function getStructure(): array;

    final public string $tableName;
    final public array $tableColumns;

    public function __construct(){
        $structure = static::getStructure();

        $this->tableName = $structure['table'];
        $this->tableColumns = $structure['columns'];
    }


    /**
     * Permet d'avoir tous les éléments correspondant à la requête passée en paramètre.
     *
     * @param string $sqlQuery
     * @return array|null
     */
    public function selectGetAll( string $sqlQuery ): ?array {
        $statement = Kernel::$DB->pdo->prepare( $sqlQuery );
        if( !$statement->execute() )
            return null;

        $results = $statement->fetchAll( PDO::FETCH_CLASS, static::getEntity() );
        if( empty( $results ) )
            return null;
        return $results;
    }

    public function addEntity( Model $entity ): bool {

        $query = "INSERT INTO {$this->tableName} (";
        $values = "(";
        foreach( $this->tableColumns as $column ) {
            $query .= "`{$column}`,";
            $values .= ":{$column},";
        }
        $query = substr( $query, 0, -1 ) . ")";
        $values = substr( $values, 0, -1 ) . ")";
        $query .= " VALUES " . $values . ";";

        $statement = Kernel::$DB->pdo->prepare( $query );
        foreach( $this->tableColumns as $column ) {
            $statement->bindValue(":{$column}", $entity->{$column} );
        }

        return $statement->execute();
    }

    public function updateEntity( Model $entity, string $identifier ): bool {
        $query = "UPDATE {$this->tableName} SET ";
        foreach( $this->tableColumns as $column ) {
            $query .= "`{$column}` = :{$column},";
        }
        $query = substr( $query, 0, -1 ) . " WHERE {$identifier} = :{$identifier};";

        $statement = Kernel::$DB->pdo->prepare( $query );
        foreach( $this->tableColumns as $column ) {
            $statement->bindValue(":{$column}", $entity->{$column} );
        }
        $statement->bindValue( ":{$identifier}", $entity->{$identifier} );
        return $statement->execute();
    }

    public function deleteEntity( Model $entity, string $identifier ): bool {
        $query = "DELETE FROM {$this->tableName} WHERE {$identifier} = :{$identifier};";
        $statement = Kernel::$DB->pdo->prepare( $query );
        $statement->bindValue( ":{$identifier}", $entity->{$identifier} );
        return $statement->execute();
    }

    abstract public function add( Model $entity ): bool;
    abstract public function update( Model $entity ): bool;
    abstract public function delete( Model $entity ): bool;


}