// SRS.cs - Chapter 14 version.

// Copyright 2004 by Jacquie Barker and Grant Palmer - all rights reserved.

// A main driver for the command-line driven version of the SRS.

using System;
using System.Collections;

public class SRS {
  // We can effectively create "global" data by declaring
  // PUBLIC STATIC fields in the main class.  

  // Entry points/"roots" for getting at objects.  

  public static ScheduleOfClasses scheduleOfClasses = 
                         new ScheduleOfClasses("SP2004");
	
  // Note that we could encapsulate the rest of these, the way that we 
  // did for the ScheduleOfClasses ...

  public static ArrayList faculty; // of Professors
  public static ArrayList studentBody; // of Students
  public static ArrayList courseCatalog; // of Courses

  static void Main() {
    Professor p1, p2, p3;
    Student s1, s2, s3;
    Course c1, c2, c3, c4, c5;
    Section sec1, sec2, sec3, sec4, sec5, sec6, sec7;

// Create various objects by calling the appropriate 
// constructors.  (We'd normally be reading in such data
// from a database or file ...)

// -----------
// Professors.
// -----------

    p1 = new Professor("Jacquie Barker", "123-45-6789", 
                       "Adjunct Professor", "Information Technology");		
    p2 = new Professor("John Smith", "567-81-2345",
                       "Full Professor", "Chemistry");		
    p3 = new Professor("Jackie Chan", "987-65-4321",
                       "Full Professor", "Physical Education");		

    // Add these to the appropriate ArrayList.

    faculty = new ArrayList();
    faculty.Add(p1);
    faculty.Add(p2);
    faculty.Add(p3);

    // ---------
    // Students.
    // ---------
		
    s1 = new Student("Joe Blow", "111-11-1111", "Math", "M.S.");

    s2 = new Student("Gerson Lopez", "222-22-2222", 
                     "Information Technology", "Ph. D.");

    s3 = new Student("Mary Smith", "333-33-3333", "Physics", "B.S.");

    // Add these to the appropriate ArrayList.

    studentBody = new ArrayList();
    studentBody.Add(s1);
    studentBody.Add(s2);
    studentBody.Add(s3);

    // --------
    // Courses.
    // --------
		
    c1 = new Course("CMP101","Beginning Computer Technology", 3.0);
    c2 = new Course("OBJ101","Object Methods for Software Development", 3.0);
    c3 = new Course("CMP283","Higher Level Languages (C#)", 3.0);
    c4 = new Course("CMP999","Living Brain Computers", 3.0);
    c5 = new Course("ART101","Beginning Basketweaving", 3.0);

    // Add these to the appropriate ArrayList.

    courseCatalog = new ArrayList();
    courseCatalog.Add(c1);
    courseCatalog.Add(c2);
    courseCatalog.Add(c3);
    courseCatalog.Add(c4);
    courseCatalog.Add(c5);

    // Establish some prerequisites (c1 => c2 => c3 => c4).

    c2.AddPrerequisite(c1);
    c3.AddPrerequisite(c2);
    c4.AddPrerequisite(c3); 

    // ---------
    // Sections.
    // ---------

    // Schedule sections of each Course by calling the
    // scheduleSection method of Course (which internally
    // invokes the Section constructor). 

    sec1 = c1.ScheduleSection('M', "8:10 - 10:00 PM", "GOVT101", 30);
    sec2 = c1.ScheduleSection('W', "6:10 - 8:00 PM", "GOVT202", 30);
    sec3 = c2.ScheduleSection('R', "4:10 - 6:00 PM", "GOVT105", 25);
    sec4 = c2.ScheduleSection('T', "6:10 - 8:00 PM", "SCI330", 25);
    sec5 = c3.ScheduleSection('M', "6:10 - 8:00 PM", "GOVT101", 20);
    sec6 = c4.ScheduleSection('R', "4:10 - 6:00 PM", "SCI241", 15);
    sec7 = c5.ScheduleSection('M', "4:10 - 6:00 PM", "ARTS25", 40);
		
    // Add these to the Schedule of Classes.

    scheduleOfClasses.AddSection(sec1);
    scheduleOfClasses.AddSection(sec2);
    scheduleOfClasses.AddSection(sec3);
    scheduleOfClasses.AddSection(sec4);
    scheduleOfClasses.AddSection(sec5);
    scheduleOfClasses.AddSection(sec6);
    scheduleOfClasses.AddSection(sec7);

    // Recruit a professor to teach each of the sections.

    p3.AgreeToTeach(sec1);
    p2.AgreeToTeach(sec2);
    p1.AgreeToTeach(sec3);
    p3.AgreeToTeach(sec4);
    p1.AgreeToTeach(sec5);
    p2.AgreeToTeach(sec6);
    p3.AgreeToTeach(sec7);

    Console.WriteLine("Student registration has begun!");
    Console.WriteLine("");

    // Students drop/add courses.

    Console.WriteLine("Student "+s1.Name+ 
                      " is attempting to enroll in "+
                      sec1.ToString());

    int status = sec1.Enroll(s1);

    // Note the use of a special method to interpret
    // and display the outcome of this enrollment request.
    // (We could have included the code in-line here, but
    // since (a) it is rather complex and (b) it will need
    // to be repeated for all subsequent enrollment requests
    // below, it made sense to turn it into a reusable method
    // instead.)

    ReportStatus(status);

    // Try enrolling the same Student in a different Section
    // of the SAME Course!

    Console.WriteLine("Student "+s1.Name+ 
                      " is attempting to enroll in "+
                      sec2.ToString());
    status = sec2.Enroll(s1);
    ReportStatus(status);

    Console.WriteLine("Student "+s2.Name+ 
                      " is attempting to enroll in "+
                      sec2.ToString());
    status = sec2.Enroll(s2);
    ReportStatus(status);

    Console.WriteLine("Student "+s2.Name+ 
                      " is attempting to enroll in "+
                      sec3.ToString());
    status = sec3.Enroll(s2);
    ReportStatus(status);

    Console.WriteLine("Student "+s2.Name+ 
				   " is attempting to enroll in "+
				   sec7.ToString());
    status = sec7.Enroll(s2);
    ReportStatus(status);

    Console.WriteLine("Student "+s3.Name+ 
				   " is attempting to enroll in "+
				   sec1.ToString());
    status = sec1.Enroll(s3);
    ReportStatus(status);

    Console.WriteLine("Student "+s3.Name+ 
				   " is attempting to enroll in "+
				   sec5.ToString());
    status = sec5.Enroll(s3);
    ReportStatus(status);

    // Skip a line.
    Console.WriteLine("");

    // When the dust settles, here's what folks wound up
    // being registered for:
    //
    // sec1:  s1, s3
    // sec2:  s2
    // sec7:  s2

    // Semester is finished (boy, that was quick!).  Professors
    // assign grades.

    sec1.PostGrade(s1, "C+");
    sec1.PostGrade(s3, "A");
    sec2.PostGrade(s2, "B+");
    sec7.PostGrade(s2, "A-");
	
    // Let's see if everything got set up properly
    // by calling various display methods!
		
    Console.WriteLine("====================");
    Console.WriteLine("Schedule of Classes:");
    Console.WriteLine("====================");
    Console.WriteLine("");
    scheduleOfClasses.Display();

    Console.WriteLine("======================");
    Console.WriteLine("Professor Information:");
    Console.WriteLine("======================");
    Console.WriteLine("");
    p1.Display();
    Console.WriteLine("");
    p2.Display();
    Console.WriteLine("");
    p3.Display();
    Console.WriteLine("");

    Console.WriteLine("====================");
    Console.WriteLine("Student Information:");
    Console.WriteLine("====================");
    Console.WriteLine("");
    s1.Display();
    Console.WriteLine("");
    s2.Display();
    Console.WriteLine("");
    s3.Display();
  }

  // Note that this is a static method ...

  public static void ReportStatus(int status) {
    if (status == Section.SUCCESSFULLY_ENROLLED) {
      Console.WriteLine("outcome:  SUCCESSFULLY_ENROLLED");
    } else if (status == Section.PREREQ_NOT_SATISFIED) {
      Console.WriteLine("outcome:  PREREQ_NOT_SATISFIED");
    } else if (status == Section.PREVIOUSLY_ENROLLED) {
      Console.WriteLine("outcome:  PREVIOUSLY_ENROLLED");
    } else if (status == Section.SECTION_FULL) {
      Console.WriteLine("outcome:  SECTION_FULL");
    }
  }
}