package project02;

import java.util.ArrayList;
import java.util.Arrays; // required for auto grading

/**
 * midterm, homework, final grades are over 100.
 * 
 * row 0: column titles row 1: weights row 2: full grades for testing row 3-:
 * actual students
 * 
 * String studentDataCsv = "studentID,name,lastName,midterm,homework,lab\n"// +
 * "-1,-weight,percent,40,10,50\n"// percentages where studentID=-1 +
 * "-2,-full,point,100,100,100\n"// test for full points where studentID=-1 +
 * "1001,Aaa,Aaaa,50,50,50\n"// first student + "1002,Bbb,Bbbb,10,10,10"//
 * second student ;
 */
public class ProcessGradingData {

	public static final String MY_ID = "20221319027";
	public static final String MY_NAME = "Deniz";
	public static final String MY_LASTNAME = "Soysal";

	public static final int WEIGHT = -1;
	public static final int FULL = -2;
	//
	public static final int S_ID = 0;
	public static final int S_NAME = 1;
	public static final int S_LAST_NAME = 2;
	public static final int MIDTERM = 3;
	public static final int HOMEWORK = 4;
	public static final int FINAL = 5;
	//
	public static double[] weight = new double[3];

	/**
	 * Student info
	 * 
	 * @return
	 */
	public static String getStudentInfo() {
		return MY_ID + "," + MY_LASTNAME + "," + MY_NAME;
	}

	/**
	 * Given two `Student`s, return `true` if the students are equal in content.
	 * 
	 * @param stdA
	 * @param stdB
	 * @return `true` if the students are equal in content.
	 */
	public static boolean equals(Student stdA, Student stdB) {
		if (stdA.getStudentID() != stdB.getStudentID()) {
			return false;
		}
		if (!stdA.getName().equals(stdB.getName())) {
			return false;
		}
		if (stdA.getLab() != stdB.getLab()) {
			return false;
		}
		if (!stdA.getLastName().equals(stdB.getLastName())) {
			return false;
		}
		if (stdA.getHomework() != stdB.getHomework()) {
			return false;
		}
		if (stdA.getMidterm() != stdB.getMidterm()) {
			return false;
		}
		
		  
		return true;
	}

	/**
	 * Given `weight` array and `Student`, calculate the weighted grade
	 * 
	 * @param weight
	 * @param student
	 * @return weighted grade
	 */
	public static double getWeightedGrade(double[] weight, Student student) {
		double grade = 0;
		grade += weight[0] * student.getMidterm();
		grade += weight[1] * student.getHomework();
		grade += weight[2] * student.getLab();
		return grade;
	}

	/**
	 * Convert student data in csv format into <code>arrStudent</code> and populate
	 * `weight` array.
	 * 
	 * @param csv student data
	 * @return array of <code>Students</code>
	 */
	public static Student[] getStudentData(String csv) {
		String[] lines=csv.split("\n");
		Student[] arrStudent = new Student[lines.length - 3] ;
		for (int i = 3; i < lines.length; i++) {
			String[] fields = lines[i].split(",");
			int Id = Integer.parseInt(fields[0]);
			String name = fields[1];
			String lastName = fields[2];
			int midterm = Integer.parseInt(fields[3]);
			int homework = Integer.parseInt(fields[4]);
			int lab = Integer.parseInt(fields[5]);
			Student student = new Student(Id,name,lastName,midterm,homework,lab);
			arrStudent[i-3] = student;
		}
		String[] fields = lines[1].split(",");
		weight[0] = Double.parseDouble(fields[3]);
		weight[1] = Double.parseDouble(fields[4]);
		weight[2] = Double.parseDouble(fields[5]);
		return arrStudent;
	}

	/**
	 * Produce report of student number and weighted grade
	 * 
	 * @param arrStudent
	 * @return
	 */
	public static String[] getReport(Student[] arrStudent) {
		String[] arrGradesOverAll = new String [arrStudent.length];
		for (int i = 0; i<arrStudent.length; i++) {
			double weightedGrade = getWeightedGrade(weight,arrStudent[i]);
			arrGradesOverAll[i] = arrStudent[i].getStudentID() +","+ weightedGrade;
		}
		//
//		System.out.println("\nnot implemented"); // TODO
		//

		//
		return arrGradesOverAll;
	}

}