/*-------------
Java Project - Student
Name: Irfan Ayub
-------------*/

import java.util.*;  // provides the ArrayList class
public class ModuleDataStore
{  // begin class ModuleDatStorea
ArrayList data; // declares an ArrayList object called 'data'

/* The constructor method. Creates the ArrayList object 'data' */
public ModuleDataStore() 
{ // begin constructor method */
data = new ArrayList();
}  // end constructor method */


/* Adds a new student data entry to the ArrayList 'data' */
public void addNewStudentRecord(String aNumber, String aName, int mark1, int mark2)
{ // begin addNewStudentEntry method */
	Student aStudent;
	aStudent =new Student(aNumber,aName,mark1,mark2);
	data.add(aStudent);
} // end addNewStudentRecord method */


/* Returns, as a String, the number, name and the two test marks of every student currently stored in the ArrayList 'data'. */
public String toString()
{ // begin toString()  method

	String details="";		//creates an empty string
    for(int i=0;i<data.size();i++) 	//loop through the arraylist
	{
		Student aStudent=(Student) 	//get the student
		data.get(i);		//get the student at current i position in array list
		details+=aStudent.toString()+"\n"+"\n"+"\n";	//add its details to the string
	}
	
	return details;		//return the string
}  // end toString() method

	
/* returns the mark of the student with the specified name */
public int getStudentRecord(String aNumber)
{ // begin method
for(int i =0; i < data.size(); i++) //loop through all of the students in the list
	{
	Student aStudent = (Student) data.get(i); //get the student in the i'th position
	if(aStudent.getPNumber().equals(aNumber)) //is it the student being searched for?
		{
		return aStudent.getTest1(); //if so then return it's test 1 mark
		}
	} // end for
	return -1;  // This will be done if the student is not found to inform the program
}  // end getStudentRecord() method


public String getStudentGrade(String aNumber)
{ // begin getStudentGrade method
//You will need to loop through the ArrayList dataStore to retrieve the specified Student object
    for(int i=0;i<data.size();i++) //loop through all of the students in the list
    {
        Student aStudent = (Student) data.get(i); //get the student in the i'th position
        if (aStudent.getPNumber().equals(aNumber)) //is it the student being searched for?
 	    {
  	        return aStudent.getGrade(); //if so then return it's grade
        }
    }
	return -1;  // This will be done if the cat is not found to inform the program
}

} // end class ModuleDataStore



/*STUDENT CLASS*/
/* Returns the student's overall module mark */
	public int getModuleMark()
	{
        int total = (test1 + test2)/2;
        return total;
    }

/*computes grade letter*/
    public String getGrade() 
	{
        int mark=this.getModuleMark();
		if (mark<=29)
		{
			return "F";
		}
		else if(mark>29 && mark<40)
		{
			return "U";
		}
		else if(mark>39 && mark<50)
		{
			return "D";
		}
		else if(mark>49 && mark<60)
		{
			return "C";
		}
		else if(mark>59 && mark<70)
		{
			return "B";
		}
		else if(mark>69 && mark<80)
		{
			return "A";
		}
		else
		{
			return "A**";
		}
    }