// swad_test.h: self-assessment tests

#ifndef _SWAD_TST
#define _SWAD_TST
/*
    SWAD (Shared Workspace At a Distance in Spanish),
    is a web platform developed at the University of Granada (Spain),
    and used to support university teaching.

    This file is part of SWAD core.
    Copyright (C) 1999-2016 Antonio Caņas Vargas

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/*****************************************************************************/
/********************************* Headers ***********************************/
/*****************************************************************************/

/*****************************************************************************/
/***************************** Public constants ******************************/
/*****************************************************************************/

#define Tst_SCORE_MAX				 10	// Maximum score of a test (10 in Spain). Must be unsigned!

#define Tst_MAX_QUESTIONS_PER_EXAM		100	// Absolute maximum number of questions in a test exam
#define Tst_MAX_TAGS_PER_QUESTION		  5
#define Tst_MAX_TAG_LENGTH			255
#define Tst_MAX_BYTES_TAG			(Tst_MAX_TAG_LENGTH*Str_MAX_CHARACTER)
#define Tst_MAX_OPTIONS_PER_QUESTION		 10
#define Tst_MAX_SIZE_INDEXES_ONE_QST		(Tst_MAX_OPTIONS_PER_QUESTION*(10+1))
#define Tst_MAX_SIZE_ANSWERS_ONE_QST		(Tst_MAX_OPTIONS_PER_QUESTION*(10+1))

#define Tst_MAX_LENGTH_ANSWER		       1000
#define Tst_MAX_BYTES_ANSWER_OR_FEEDBACK	(Tst_MAX_LENGTH_ANSWER*Str_MAX_CHARACTER)

#define Tst_CONFIG_DEFAULT_MIN_QUESTIONS	  1
#define Tst_CONFIG_DEFAULT_DEF_QUESTIONS	 20	// Number of questions to be generated by default in a self-assessment test
#define Tst_CONFIG_DEFAULT_MAX_QUESTIONS	 30	// Maximum number of questions to be generated in a self-assessment test

/*****************************************************************************/
/******************************* Public types ********************************/
/*****************************************************************************/

#define Tst_NUM_OPTIONS_PLUGGABLE	3
typedef enum
  {
   Tst_PLUGGABLE_UNKNOWN = 0,
   Tst_PLUGGABLE_NO      = 1,
   Tst_PLUGGABLE_YES     = 2,
  } Tst_Pluggable_t;

#define Tst_NUM_TYPES_FEEDBACK		5
typedef enum
  {
   Tst_FEEDBACK_NOTHING        = 0,
   Tst_FEEDBACK_TOTAL_RESULT   = 1,
   Tst_FEEDBACK_EACH_RESULT    = 2,
   Tst_FEEDBACK_EACH_GOOD_BAD  = 3,
   Tst_FEEDBACK_FULL_FEEDBACK  = 4,
  } Tst_Feedback_t;
#define Tst_FEEDBACK_DEFAULT Tst_FEEDBACK_FULL_FEEDBACK

struct Tst_Config
  {
   Tst_Pluggable_t Pluggable;
   unsigned Min;	// Minimum number of questions
   unsigned Def;	// Default number of questions
   unsigned Max;	// Maximum number of questions
   unsigned long MinTimeNxtTstPerQst;
   Tst_Feedback_t FeedbackType;
  };

#define Tst_NUM_ANS_TYPES	6
#define Tst_MAX_BYTES_LIST_ANSWER_TYPES		(10+(Tst_NUM_ANS_TYPES-1)*(1+10))
typedef enum
  {
   Tst_ANS_INT             = 0,
   Tst_ANS_FLOAT           = 1,
   Tst_ANS_TRUE_FALSE      = 2,
   Tst_ANS_UNIQUE_CHOICE   = 3,
   Tst_ANS_MULTIPLE_CHOICE = 4,
   Tst_ANS_TEXT            = 5,
   Tst_ANS_ALL             = 6,	// All/any type of answer
  } Tst_AnswerType_t;

#define Tst_NUM_TYPES_ORDER_QST	5
typedef enum
  {
   Tst_ORDER_STEM                    = 0,
   Tst_ORDER_NUM_HITS                = 1,
   Tst_ORDER_AVERAGE_SCORE           = 2,
   Tst_ORDER_NUM_HITS_NOT_BLANK      = 3,
   Tst_ORDER_AVERAGE_SCORE_NOT_BLANK = 4,
  } Tst_QuestionsOrder_t;

struct Tst_Stats
  {
   unsigned NumCoursesWithQuestions;
   unsigned NumCoursesWithPluggableQuestions;
   unsigned NumQsts;
   float AvgQstsPerCourse;
   unsigned long NumHits;
   float AvgHitsPerCourse;
   float AvgHitsPerQuestion;
   double TotalScore;
   double AvgScorePerQuestion;
  };

/*****************************************************************************/
/***************************** Public prototypes *****************************/
/*****************************************************************************/

void Tst_ShowFormAskTst (void);
void Tst_ShowNewTestExam (void);
void Tst_AssessTestExam (void);
void Tst_WriteQstStem (const char *Stem,const char *ClassStem);
void Tst_WriteQstFeedback (const char *Feedback,const char *ClassFeedback);

void Tst_SetIniEndDates (void);
void Tst_ShowFormAskEditTsts (void);
void Tst_ListQuestionsToEdit (void);
void Tst_WriteParamEditQst (void);
unsigned Tst_GetAnswersQst (long QstCod,MYSQL_RES **mysql_res,bool Shuffle);
void Tst_WriteAnsTF (char AnsTF);
void Tst_CheckIfNumberOfAnswersIsOne (void);
unsigned long Tst_GetTagsQst (long QstCod,MYSQL_RES **mysql_res);
void Tst_ShowFormConfig (void);
void Tst_EnableTag (void);
void Tst_DisableTag (void);
void Tst_RenameTag (void);
void Tst_GetConfigFromRow (MYSQL_ROW row);
bool Tst_CheckIfCourseHaveTestsAndPluggableIsUnknown (void);
void Tst_ReceiveConfigTst (void);
void Tst_ShowFormEditOneQst (void);

void Tst_QstConstructor (void);
void Tst_QstDestructor (void);

int Tst_AllocateTextChoiceAnswer (unsigned NumOpt);

Tst_AnswerType_t Tst_ConvertFromStrAnsTypDBToAnsTyp (const char *StrAnsTypeBD);
void Tst_ReceiveQst (void);
bool Tst_CheckIfQstFormatIsCorrectAndCountNumOptions (void);
long Tst_GetIntAnsFromStr (char *Str);
double Tst_GetFloatAnsFromStr (char *Str);
void Tst_RequestRemoveQst (void);
void Tst_RemoveQst (void);
void Tst_ChangeShuffleQst (void);
void Tst_InsertOrUpdateQstTagsAnsIntoDB (void);

void Tst_FreeTagsList (void);

void Tst_GetTestStats (Tst_AnswerType_t AnsType,struct Tst_Stats *Stats);

void Tst_SelUsrsToSeeUsrsExams (void);
void Tst_SelDatesToSeeMyExams (void);
void Tst_ShowUsrsExams (void);
void Tst_ShowMyExams (void);
void Tst_ShowOneExam (void);
void Tst_RemoveExamsMadeByUsrInAllCrss (long UsrCod);
void Tst_RemoveExamsMadeByUsrInCrs (long UsrCod,long CrsCod);
void Tst_RemoveCrsExams (long CrsCod);

void Tst_RemoveCrsTests (long CrsCod);

#endif