/***********************************************************************/ 
/* Course:          Computer Science 402a                              */ 
/* Assignment:      Assignment 2                                       */ 
/* Instructor:      Mark Giesbrecht                                    */ 
/* Submitted by:    Dan Fraser                                         */ 
/* Student Number:  001219229                                          */ 
/* Due Date:        Wednesday, February 16                             */ 
/***********************************************************************/ 
/* Busy.cc - Implementation for the schedule/busy class                */              
/***********************************************************************/

/* see Busy.h for detailed  docs */
#include "Busy.h"
#define TEMPSIZE 1024

Busy::Busy() {
  for (int i = 0; i < DAYLEN; i++) {
    meetings[i] = NULL;
  }
}

bool Busy::allocate(Meeting *meeting, int start, int length) {
  for (int i = start; i < start+length; i++) {
    meetings[i] = meeting;
  }
  return 1;
}

bool Busy::deallocate(int start, int length) {
  for (int i = start; i < start+length; i++) {
    if (meetings[i] == NULL) {
      return 0;
    }
  }
  delete(meetings[start]);
  for (int i = start; i < start+length; i++) {
    meetings[i]=NULL;
  }
  return 1;
}

bool Busy::deallocate(Meeting *meeting) {
  int did_something = 0;
  for (int i = 0; i< DAYLEN; i++) {
    if (meetings[i] == meeting) {
      meetings[i] = NULL;
      did_something = 1;
    }
  }
  return did_something;
}


bool Busy::check(Busy busylist) {
  for (int i = 0; i < DAYLEN; i++) {
    if (meetings[i] && busylist.meetings[i]) {
      cout << "conflict found at time " << i << endl;
      return 0;
    }
  }
  return 1;
}

bool Busy::check(int start, int length) {
  for (int i = start; i < start+length; i++) {
    if (meetings[i] != NULL) {
      cout << "conflict found at time " << i << endl;
      return 0;
    }
  }
  return 1;
}


void Busy::print() {
  for (int i; i < DAYLEN; i++) {
    Meeting *current_meeting;
    vector<int> *attendees;
    if (meetings[i] != NULL) {
      cout << i << ": " << "start: " << realTime(meetings[i]->getStart());
      cout << ", length: " << meetings[i]->getLength() * 15 << " minutes";
      attendees = meetings[i]->getAttendees();
      if (attendees->size()) {
	cout << ", attended by (uids): ";
	for(vector<int>::iterator p = attendees->begin();
	    p != attendees->end();
	    p++) {
	  cout << *p << " ";
	}
      }
      cout << endl;
    }
  }
}

string Busy::realTime(int time) {
  char temp[TEMPSIZE];
  int minute;
  int day, hour;
  string temp_str;
  string days[]  = {"Monday","Tuesday","Wednesday","Thursday","Friday"};
  minute = (time % 4) * 15;
  hour = 8+(floor((time % 32) / 4));
  day = (int) rint(ceil((time / 32)));
  temp_str = days[day];
  sprintf(temp," %02d:%02d",hour,minute);
  temp_str += temp;
  return temp_str;
}