/*

CS471B Assignment 2: University
Instructor: Wade Holst

Submitted by: Dan Fraser
Student number: 001219229

File Name: University.cc
File description: University aggregate class implementation

*/

#include "University.h"


// initialize our instance
University* University::_instance = 0;


// meat of the singleton... lazy initalization of 
// our class!
University* University::Instance() {
  if (_instance == 0) {
    cout << "creating new university" << endl;
    _instance = new University;
  }
  return _instance;
}


University::~University() {
  // delete ourself and our components
  cout << "University: destructor" << endl;
  vector<FacultyComponent*>::iterator p;
  for (p = _faculties.begin() ; p != _faculties.end() ; p++) {
    delete(*p);
  }
}

void University::add(FacultyComponent *f) {
  _faculties.push_back(f); // add to the vector
}

void University::del(FacultyComponent *f) {
  vector<FacultyComponent*>::iterator p;
  // see if f is in the vector
  if ((p = find(_faculties.begin(), _faculties.end(), f)) != _faculties.end()) {
    // if it is, delete it
    _faculties.erase(p);
  } else {
    // if it isn't, warn!
    cout << "warning, tried to delete faculty but couldn't find it" << endl;
  }
}

int University::getTopMark() const {
  vector<FacultyComponent*>::const_iterator p;
  int topMark = 0;
  for ( p = _faculties.begin() ; p != _faculties.end() ; p++) {
    if ((*p)->getTopMark() > topMark) {
      topMark = (*p)->getTopMark();
    }
  }
  return topMark;
}

int University::getTotalStudents() const { 
  vector<FacultyComponent*>::const_iterator p;
  int totalStudents = 0;
  for ( p = _faculties.begin() ; p != _faculties.end() ; p++) {
    totalStudents += (*p)->getTotalStudents();
  }
  return totalStudents;
}

int University::getTotalPeople() const {
  vector<FacultyComponent*>::const_iterator p;
  int totalPeople = 0;
  for ( p = _faculties.begin() ; p != _faculties.end() ; p++) {
    totalPeople += (*p)->getTotalPeople();
  }
  return totalPeople;
}

Professor* University::getTopProfessor() const {
  vector<FacultyComponent*>::const_iterator p;
  Professor *topProfessor = NULL;
  int topSalary = 0;
  for ( p = _faculties.begin() ; p != _faculties.end() ; p++) {
    if ((*p)->getTopProfessor() != NULL) {
      if ((*p)->getTopProfessor()->getSalary() > topSalary) {
	topSalary = (*p)->getTopProfessor()->getSalary();
	topProfessor = (*p)->getTopProfessor();
      }
    }
  }
  return topProfessor;
}