/* Tuesday pm lecture - Part 2: Methods for Containment
                           +---------------+
                           | GradeRecord   |
                           +---------------+
         +-----------------| Course course |
         |                 | String term   |
         |                 | double grade  |
         |                 +---------------+
         v
+---------------+
| Course        |
+---------------+
| int num       |
| String title  |
| int credits   |  
+---------------+ 
*/

// to represent student's grade record
class GradeRecord {
  Course course;
  String term;
  double grade;

  GradeRecord(Course course, String term, double grade) {
    this.course = course;
    this.term = term;
    this.grade = grade;
  }


/*  TEMPLATE:
  ... this.course ...                     -- Course
  ... this.term ...                       -- String
  ... this.grade ...                      -- double
  ... this.course.qPoints(double g) ...   -- double
*/

  // compute the quality points for this grade record
  double qPoints(){ 
    return this.course.qPoints(this.grade);
  }
}


// to represent a course in the registrar system
class Course {
  int num;
  String title;
  int credits;

  Course(int num, String title, int credits) {
    this.num = num;
    this.title = title;
    this.credits = credits;
  }

/*  TEMPLATE:
  ... this.num ...      -- int
  ... this.title ...    -- String
  ... this.credits ...  -- int
*/

  // compute the quality points for the given grade earned in this course
  double qPoints(double grade){
    return this.credits * grade;
  }
}

// client class for the GradeRecord and Course classes
class Examples{
  Examples(){}

  // sample courses
  Course fund = new Course(211, "Fundamentals", 4);
  Course ovw  = new Course(220, "Overview", 1);
  Course algo = new Course(690, "Algorithms", 4);

  // sample grade records
  GradeRecord fundFL05 = new GradeRecord(this.fund, "FL05", 3.66);
  GradeRecord ovwFL05 = new GradeRecord(this.ovw, "FL05", 4.0);
  GradeRecord algoSP05 = new GradeRecord(this.algo, "SP05", 3.0);

  // tests for the method qPoints in the class GradeRecord
  boolean test1 = check this.fundFL05.qPoints() expect 14.64 within 0.01;
  boolean test2 = check this.ovwFL05.qPoints() expect 4.0 within 0.01;
  boolean test3 = check this.algoSP05.qPoints() expect 12.0 within 0.01;

  boolean test4 = check this.fund.qPoints(3.66) expect 14.64 within 0.01;
  boolean test5 = check this.ovw.qPoints(4.0) expect 4.0 within 0.01;
  boolean test6 = check this.algo.qPoints(3.0) expect 12.0 within 0.01;
}