<?php
/**
 * Copyright (C) 2024 fhcomplete.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

if (! defined('BASEPATH')) exit('No direct script access allowed');
class Studium extends FHCAPI_Controller
{
	
	/**
	 * Object initialization
	 */
	public function __construct()
	{
		parent::__construct([
			'getStudienAllSemester'=> self::PERM_LOGGED,
			'getStudiengaengeForStudienSemester'=> self::PERM_LOGGED,
			'getStudienplaeneBySemester'=> self::PERM_LOGGED,
		]);

		$this->load->model('crm/Student_model', 'StudentModel');
		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
		$this->load->model('organisation/Studienordnung_model','StudienordnungModel');
		$this->load->model('organisation/Studiensemester_model',"StudiensemesterModel");
		$this->load->model('organisation/Studienplan_model', 'StudienplanModel');
		$this->load->model('education/Studentlehrverband_model', 'StudentlehrverbandModel');
		$this->load->model('crm/Prestudentstatus_model', 'PrestudentstatusModel');
		$this->load->model('codex/Orgform_model','OrgformModel');

		
	}

	//------------------------------------------------------------------------------------------------------------------
	// Public methods

	public function getStudienAllSemester(){

		$parameter_studiensemester = $this->input->get('studiensemester',true);
        $parameter_studiengang = $this->input->get('studiengang',true);
		$parameter_semester = $this->input->get('semester',true);
		$parameter_studienplan = $this->input->get('studienplan',true);

		$test1=null;
		$test2=null;
		$test3=null;
		$test4=null;

		if(isset($parameter_studiensemester)){
			$parameter_studiensemester = current($this->getDataOrTerminateWithError($this->StudiensemesterModel->loadWhere(["studiensemester_kurzbz" => $parameter_studiensemester])));
		}

		if(isset($parameter_studiengang)){
			$parameter_studiengang = current($this->getDataOrTerminateWithError($this->StudiengangModel->loadWhere(["studiengang_kz" => $parameter_studiengang])));
		}

		if(isset($parameter_studienplan)){
			$this->StudienplanModel->addJoin("lehre.tbl_studienordnung", "studienordnung_id");
			$this->StudienplanModel->addJoin("lehre.tbl_studienplan_semester", "studienplan_id");
			$parameter_studienplan = $this->StudienplanModel->loadWhere(["studienplan_id" => $parameter_studienplan, "aktiv" => TRUE]);
			$parameter_studienplan = current($this->getDataOrTerminateWithError($parameter_studienplan));
		}

		// fetch studiensemester
		$allStudienSemester = $this->getDataOrTerminateWithError($this->StudiensemesterModel->load());
		
		$aktuelles_studiensemester = current($this->getDataOrTerminateWithError($this->StudiensemesterModel->getAkt()));
		if(isset($parameter_studiensemester) && !empty(array_filter($allStudienSemester, function($studiensemester) use($parameter_studiensemester){
			return $studiensemester->studiensemester_kurzbz == $parameter_studiensemester->studiensemester_kurzbz;
		}))){
			$test1=true;
			$aktuelles_studiensemester = $parameter_studiensemester;
		}
		
		// fetch studiengaenge
		$studiengaenge = $this->computeStudiengaenge($aktuelles_studiensemester->studiensemester_kurzbz);
		$aktuelles_studiengang = current($studiengaenge);
		if(!$aktuelles_studiengang){
			$aktuelles_studiengang = null;
		}
		if(isset($parameter_studiengang) && !empty(array_filter( $studiengaenge,function($studiengang)use($parameter_studiengang){
			return $studiengang->studiengang_kz == $parameter_studiengang->studiengang_kz;
		}))){
			$test2=true;
			$aktuelles_studiengang = $parameter_studiengang;
		}
		
		// compute semester and studienplaene
		if($aktuelles_studiengang){
			$studienplaene = $this->computeStudienplaene($aktuelles_studiengang->studiengang_kz, $aktuelles_studiensemester->studiensemester_kurzbz);
		}else{
			$studienplaene =[];
		}

		$semester = array_values(array_unique(array_map(function($item){
			return $item->semester;
		}, $studienplaene))); 
		$aktuelles_semester = current($semester);
		if(!$aktuelles_semester){
			$aktuelles_semester = null;
		}
		if(isset($parameter_semester) && in_array($parameter_semester, $semester)){
			$test3=true;
			$aktuelles_semester = $parameter_semester;
		}

		$semester_studienplan = array_filter($studienplaene, function($item) use($aktuelles_semester){
			return $item->semester == $aktuelles_semester;
		});
		
		// fetch current studienplan based on semester
		$aktuelles_studienplan = current($semester_studienplan);
		if(!$aktuelles_studienplan){
			$aktuelles_studienplan = null;
		}
		if(isset($parameter_studienplan) && !empty(array_filter( $semester_studienplan, function($stundenplan) use($parameter_studienplan){
			return $stundenplan->studienplan_id == $parameter_studienplan->studienplan_id;
		}))){
			$test4=true;
			$aktuelles_studienplan = $parameter_studienplan ;
		}

		// result object
		$result = new stdClass();
		$result->studienSemester = [];
		$result->studienSemester["all"]= $allStudienSemester;
		$result->studienSemester["preselected"]=$aktuelles_studiensemester;
		$result->studiengang["all"]=$studiengaenge;
		$result->studiengang["preselected"]=$aktuelles_studiengang;
		$result->semester["all"] =$semester;
		$result->semester["preselected"] =$aktuelles_semester;
		$result->studienplan["all"]=$semester_studienplan;
		$result->studienplan["preselected"]=$aktuelles_studienplan;  
		$result->test1=$test1;
		$result->test2=$test2; 
		$result->test3=$test3; 
		$result->test4=$test4; 
		
		/* if($this->getDataOrTerminateWithError($this->StudentModel->isStudent(getAuthUID()))){
			$studentLehrverband =$this->StudentlehrverbandModel->loadWhere(["student_uid" => getAuthUID(), "studiensemester_kurzbz" => $aktuelles_studiensemester_kz]);
			$studentLehrverband = current($this->getDataOrTerminateWithError($studentLehrverband));
			$result->studentLehrverband = $studentLehrverband;
			//$currentStudienplan = $this->StudienplanModel->loadWhere(["studiengang_kz"=>$studentLehrverband->studiengang_kz,"semester"=>$studentLehrverband->semester, "verband"=>$studentLehrverband->verband, "gruppe"=>$studentLehrverband->gruppe]);
			$studienplaene = $this->getDataOrTerminateWithError($this->computeStudienplaene($studentLehrverband->studiengang_kz, $studentLehrverband->studiensemester_kurzbz));
			$result->studienPleane = $studienplaene;
			
			//get the studienplan for the user
			$preselectedStudienplan = $this->getStudienPlanFromPrestudentStatus(getAuthPersonId());

			//set the preselected semester
			$preselectedSemester = $preselectedStudienplan->semester;
			
			//get the studienordnung for the studienplan
			$preselectedStudienordnung = $this->getStudienOrdnungForStudienplan($preselectedStudienplan->studienplan_id);
			
		}  */
		$this->terminateWithSuccess($result);
	}

	public function getStudiengaengeForStudienSemester($studiensemester){
		$studiengaenge = $this->computeStudiengaenge($studiensemester);
		$this->terminateWithSuccess($studiengaenge);
	}

	public function getStudienplaeneBySemester(){
		$this->load->library('form_validation');
        $this->form_validation->set_data($this->input->get());
		$this->form_validation->set_rules('studiengang', 'studiengang', 'required');
        $this->form_validation->set_rules('studiensemester', 'studiensemester', 'required');
        if($this->form_validation->run() == FALSE) $this->terminateWithValidationErrors($this->form_validation->error_array());
 
        $studiengang = $this->input->get('studiengang',true);
        $studiensemester = $this->input->get('studiensemester',true);
        $studienplaene = $this->computeStudienplaene($studiengang, $studiensemester);
		$this->terminateWithSuccess($studienplaene);
	}

	//------------------------------------------------------------------------------------------------------------------
	// Private methods

	private function computeStudienplaene($studiengang, $studiensemester){
		$studienplaene = $this->StudienplanModel->getStudienplaeneBySemester($studiengang, $studiensemester);
		$studienplaene = $this->getDataOrTerminateWithError($studienplaene);
		$studienplaene = array_map(function($studienplan){
			$orgform = current($this->getDataOrTerminateWithError($this->OrgformModel->loadWhere(["orgform_kurzbz" => $studienplan->orgform_kurzbz])));
			$studienplan->orgform_bezeichnung = $orgform->bezeichnung;
			return $studienplan;
		},$studienplaene);
		return $studienplaene;
	}

	private function computeStudiengaenge($studiensemester){
		$studiengang_studiensemester_result = $this->StudiengangModel->getStudiengaengeByStudiensemester($studiensemester);
		$studiengang_studiensemester_result = $this->getDataOrTerminateWithError($studiengang_studiensemester_result);
		return $studiengang_studiensemester_result;
	}

	private function getStudienPlanFromPrestudentStatus($person_id){
			$studienplan_id = current($this->getDataOrTerminateWithError($this->PrestudentstatusModel->getLastStatusPerson($person_id)))->studienplan_id;
			$studienplan =current($this->getDataOrTerminateWithError($this->StudienplanModel->loadWhere(["studienplan_id"=>$studienplan_id])));
			return $studienplan;
	}
	
}