//Daniel Hong
//Assignment 5
//Hoenigman


#include "CommunicationNetwork.h"
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
using namespace std;



void CommunicationNetwork::addCity(string previous, string newCity)
{
    City *temp = new City;
    temp -> cityName = newCity;
    head -> prev = temp;
    temp -> message = "";
    if (previous == "First")
    {
        temp -> next = head;
        temp -> prev = NULL;
        head = temp;
    }
    else
    {
        City *current = head;
        while (current != NULL)
        {
            if (current -> cityName == previous)
            {
                temp -> next = current -> next;
                current -> next = temp;
                break;
            }
           current = current -> next;
        }
     }
}



void CommunicationNetwork::printNetwork()
{
     City *current = head;
     cout << "===CURRENT PATH===" << endl;
     while (current != nullptr)
     {
        cout << current -> cityName << " -> ";
        current = current -> next;
     }
     cout << " NULL" << endl;
     cout << "==================" << endl;
}



void CommunicationNetwork::transmitMsg(char *filename)
{
    string word;
    ifstream file;
    file.open(filename);
    if (!file.is_open())
    {
        cout << "File not found." << endl;
    }

    while (file >> word)
    {
        City *current = head;
        current -> message = word;
        City *sender = new City;
        while (current != NULL)
        {
            cout << current -> cityName << " received " << current -> message << endl;
            if (current -> next != NULL)
            {
                current -> next -> message = current -> message;
                if (current != head)
                {
                    sender -> message = "";
                }
            sender = current;
            }
        current = current -> next;
        }

     }

}



void CommunicationNetwork::buildNetwork()
{
    string cities[10] =
    {
        "Los Angeles",
        "Phoenix",
        "Denver",
        "Dallas",
        "St. Louis",
        "Chicago",
        "Atlanta",
        "Washington, D.C.",
        "New York",
        "Boston",
    };
    City *city;
    City *prev = new City;
    for (int i = 0; i < 10; i++)
    {
        city = new City;
        city -> cityName = cities[i];
        city -> message = "";
        city -> next = NULL;
        if (i == 0)
        {
            head = city;
            prev = head;
        }
        else
        {
            prev -> next = city;
            prev = city;
        }
    }
}






CommunicationNetwork::~CommunicationNetwork()
{
  clearNetwork();
}