<?php
/**
 * Created by PhpStorm.
 * User: lucas
 * Date: 05/03/18
 * Time: 19:39
 */

namespace database\repo;


use database\core\Repo_i;

class departement extends Repo_i
{

	public function getErrors() : array {

		$results = [];

		/* (1) Find Groups without formation bound */
		$GroupWithoutFormation = $this->pdo->prepare("
			(SELECT 'NO_FORMATION_ASSIGNED' errorType, 'Cours' entityType, idCours id FROM Cours WHERE idCours NOT IN (SELECT Cours_idCours FROM GroupeCours))
		UNION
			(SELECT 'NO_FORMATION_ASSIGNED' errorType, 'TD' entityType, idTD id FROM TD WHERE idTD NOT IN (SELECT TD_idTD FROM GroupeTD))
		UNION
			(SELECT 'NO_FORMATION_ASSIGNED' errorType, 'TP' entityType, idTP id FROM TP WHERE idTP NOT IN (SELECT TP_idTP FROM GroupeTP))");

		$GroupWithoutFormation->execute([]);

		$results = array_merge($results,$GroupWithoutFormation->fetchAll());

		/* (2) Find Groups without a professor bound */

		$GroupWithoutProfessor = $this->pdo->prepare("
		(SELECT 'NO_PROFESSOR_ASSIGNED' errorType, 'Cours' entityType, idCours id FROM Cours WHERE Professeur_idProfesseur IS NULL)
			UNION
		(SELECT 'NO_PROFESSOR_ASSIGNED' errorType, 'TD' entityType, idTD id FROM TD WHERE Professeur_idProfesseur IS NULL)
			UNION
		(SELECT 'NO_PROFESSOR_ASSIGNED' errorType, 'TP' entityType, idTP id FROM TP WHERE Professeur_idProfesseur IS NULL)");

		$GroupWithoutProfessor->execute([]);

		$results = array_merge($results,$GroupWithoutProfessor->fetchAll());

		/* (3) Find Groups a null VH */

		$GroupWithNullVH = $this->pdo->prepare("
		(SELECT 'NULL_VH' errorType, 'Cours' entityType, idCours id FROM Cours WHERE volume = 0)
			UNION
		(SELECT 'NULL_VH' errorType, 'TD' entityType, idTD id FROM TD WHERE volume = 0)
			UNION
		(SELECT 'NULL_VH' errorType, 'TP' entityType, idTP id FROM TP WHERE volume = 0)");

		$GroupWithNullVH->execute([]);

		$results = array_merge($results,$GroupWithNullVH->fetchAll());

		/* (4) Find UE with an incorrect VH in the groups compared to what's supposed to be */

		$UEWithIncorrectGroupVH = $this->pdo->prepare("
		(SELECT 'UNEQUIVALENT_VH' errorType, 'Cours' entityType, U.code
		FROM UE U
		WHERE
  			0 != (SELECT MOD(SUM(volume),U.volumeCours) modCours FROM Cours WHERE UE_code = U.code GROUP BY Cours.UE_code)
  		)
  		
		UNION
		
		(SELECT 'UNEQUIVALENT_VH' errorType, 'TD' entityType, U.code
 		FROM UE U
 		WHERE
   			0 != (SELECT MOD(SUM(volume),U.volumeTD) modCours FROM TD WHERE UE_code = U.code GROUP BY TD.UE_code)
   		)
   		
		UNION
		
		(SELECT 'UNEQUIVALENT_VH' errorType, 'TP' entityType, U.code
 		FROM UE U
 		WHERE
   			0 != (SELECT MOD(SUM(volume),U.volumeTP) modCours FROM TP WHERE UE_code = U.code GROUP BY TP.UE_code)
   		)");

		$UEWithIncorrectGroupVH->execute([]);

		$results = array_merge($results,$UEWithIncorrectGroupVH->fetchAll());

		return $results;
	}

}