////////////////////////////////////////
// Spam Cupcakes, the pointed view

// HINTS AND GUIDELINE
// You should do this assignment in the following order:
// - Make the changes to the Customer class
// - Test the Customer class using the provided test main
// - Make the changes to the CustomerList class
// - Test the CustomerList class using the provided test main
// - Make changes to your main so that it worksa



////////////////////////////////////////
// Standard included things
#include<iostream>
#include<iomanip>
#include<fstream>
#include<vector>
using namespace std;

////////////////////////////////////////
// Function prototypes
void print_menu();
void print_vector(vector<string>);

////////////////////////////////////////
// Class definitions


// A self-referential class to hold customer information
class Customer{
    friend ostream &operator<<(ostream &, Customer);
    friend istream &operator>>(istream &, Customer &);

    public:
    Customer ();
    Customer (string , string);
    string getName();
    string getEmail();
    Customer* getNextCustomer();
    void setName(string);
    void setEmail(string);
    void setNextCustomer(Customer *);

    private:
    string name;
    string email;

    // The private variable below is the pointer to the next customer on the list.
    // It is null if there is no next customer
    Customer* nextCustomer;
};

ostream &operator<<(ostream &output, Customer c){
    output << setw(40) << c.email << setw(40) << c.name;
    return output;
}

istream &operator>>(istream &input, Customer & c){
    input >> c.email;
    input.ignore();
    getline(input, c.name);
    return input;
}

Customer::Customer(){
    string name = "";
    string email = "";
    nextCustomer = NULL;
}

Customer::Customer (string newName, string newEmail){
    name = newName;
    email = newEmail;
    nextCustomer = NULL;
}

string Customer::getName(){
    return name;
}

string Customer::getEmail(){
    return email;
}

Customer* Customer::getNextCustomer(){
    // This returns the next customer on the list
    // The thing it returns should be a pointer
    return nextCustomer;
}

void Customer::setName(string newName) {
    name = newName;
}
void Customer::setEmail(string newEmail){
    email = newEmail;
}

void Customer::setNextCustomer(Customer* next){
    nextCustomer = next;
}

// A class to hold the customer email list
// Using pointers, not vector
class CustomerList{

    public:
        CustomerList();
        CustomerList(string);
        void loadFile(string);
        void showNames();
        void showEmails();
        void showList();
        int countNameAppearances(string);
        int countEmailAppearances(string);
        int deleteCustomer(string);
        void addCustomer(string, string);

    private:
        // The pointer below is the head of the customerList. It replaces
        // the vector of Customers from the last assignment. In short, this is
        // pointer that points to the first Customer. The first Customer points to
        // the second Customer, and so on. The last Customer on the list points to NULL.
        Customer* head;

        // This is a private method that will delete all the elements on the Customer list.
        // This is only used by loadFile to make sure files are loaded twice
        void clearCustomerList();
};

CustomerList::CustomerList():head(NULL)
{
    // Here we need to make sure that our initial head pointer is null
    // write this
}

CustomerList::CustomerList(string filename):head(NULL)
{
    // Here we need to make sure that our initial head pointer is null
    // and call loadFile to read in a file.
    // write this
}

void CustomerList::loadFile(string filename) {
    // This method loads all the customers in from a file.
    // Don't forget to delete the current list before loading a new one
    // For each line in the file, which represents a single customer
    // we need to:
    // - Create a new customer using the new command
    // - Input from the file into the new Customer using the >> operator
    // - Add the new customer to the list by setting its nextCustomer using setNextCustomer
    //   and then change the head pointer to point at the new Customer
    // - Delete any unused Customer object
    // write this
}

void CustomerList::showNames(){

    // This should traverse the list from the head on down and print out each name
    // from each customer on the list

    // write this

}

void CustomerList::showEmails(){

    // This should traverse the list from the head on down and print out each email
    // from each customer on the list

    // write this

}

void CustomerList::showList(){

    // This should traverse the list from the head on down and print out each email
    // and name from each customer on the list

    // write this
}

int CustomerList::countNameAppearances(string name){
    Customer* current = head;
    int counter = 0;

    while (current != NULL){
        if ((current->getName()) == name){
            counter ++;
        }
        current = current->getNextCustomer();
    }
    return counter;
}

int CustomerList::countEmailAppearances(string email){
    Customer* current = head;
    int counter = 0;

    while (current != NULL){
        if ((current->getEmail()) == email){
            counter ++;
        }
        current = current->getNextCustomer();
    }
    return counter;
}

int CustomerList::deleteCustomer(string email){
    int counter = 0;
    Customer* shadow = head;
    Customer* current = head;
    while (current!=NULL){
        if (( current->getEmail()) == email) {
            if (current == head){
                shadow = current->getNextCustomer();
                delete (head);
                counter++;
                head = shadow;
                current = current->getNextCustomer();
            }
            else {
                shadow = current;
                current = current->getNextCustomer();
                current->setNextCustomer(shadow);
                delete (shadow);
                counter++;
            }
        }
    }
}

void CustomerList::addCustomer(string email, string name){
    Customer* temp = new Customer (name, email);
    //temp = new Customer (email, name);
    temp->setNextCustomer(head);
    head = temp;
}

void CustomerList::clearCustomerList(){
    // This should call delete on all the items in the list
    // and leave head set to null
    // write this

}

////////////////////////////////////////
// Main function
//
//
/*start of comment out working main
  int main () {

  CustomerList theList;

  char choice;
  bool done = false;
  string input, input2;
  int count = 0;
  vector<string> temp;
  string filename;

  do {

// Print the menu for the user
print_menu();

cin >> choice;

switch(choice){
case 'L':
case 'l':
cout << "What file would you like to load: ";
cin >> filename;
theList.loadFile(filename);
break;
case 'S':
case 's':
theList.showList();
break;
case 'M':
case 'm':
theList.showNames();
break;
case 'R':
case 'r':
theList.showEmails();
break;
case 'C':
case 'c':
cout << "What name do you want to use: ";
cin.ignore();
getline(cin,input);
count = theList.countNameAppearances(input);
cout << endl << "\"" << input << "\" appeared " << count << " times."      << endl;
break;
case 'V':
case 'v':
cout << "What email address do you want to use: ";
cin >> input;
count = theList.countEmailAppearances(input);
cout << endl << "\"" << input << "\" appeared " << count << " times."      << endl;
break;
case 'A':
case 'a':
cout << "What email address do you want to add: ";
cin >> input;
cout << "What name goes with that: ";
cin.ignore();
getline(cin, input2);
theList.addCustomer(input, input2);
break;
case 'D':
case 'd':
cout << "What email address do you want to delete: ";
cin >> input;
count = theList.deleteCustomer(input);
cout << "Deleted " << count << " instances of " << input << endl;
break;
case 'X':
case 'x':
case 'Q':
case 'q':
done = true;
cout << "Goodbye" << endl;
break;
default:
cout << "Bad command option." << endl;
} // end switch
} while (!done);



return 0;
}
//
*/ //end of comment out working main


////////////////////////////////////////
// A test main for the Customer class
/* Start of comment out Customer test main
   int main(){



   cout << "Testing default constructor: " << endl;
   Customer* cPtr= new Customer;
   if (cPtr->getNextCustomer() != NULL){
   cout << "ERR: nextCustomer is not null. You likely need to" << endl
   << "set it to null in Customer::Customer" << endl;
   }
   else {
   cout << "--> Pass" << endl;
   }
   delete (cPtr);

   string name = "Clay";
   string email = "clay@cs.georgetown.edu";
   cout << "Testing constructor with strings: " << endl;
   cPtr= new Customer(name, email);
   if (cPtr->getNextCustomer() != NULL){
   cout << "ERR: nextCustomer is not null. You likely need to" << endl
   << "set it to null in Customer::Customer(string, string)" << endl;
   }
   else {
   cout << "--> Pass" << endl;
   }


   cout << "Testing setNextCustomer: " << endl;
   Customer* c2Ptr = new Customer;
   cPtr->setNextCustomer(c2Ptr);
   if (cPtr->getNextCustomer() != c2Ptr){
   cout << "ERR: nextCustomer is " << cPtr << " but it should be "
   << c2Ptr << endl;
   }
   else {
   cout << "--> Pass" << endl;
   }


   }

//end of comment out Customer test main
 */


////////////////////////////////////////
// Test main for CustomerList class
// /* // start to comment out CustomerList test main
int main(){

    CustomerList list;

    // test add customers
    cout << "Adding customer 1:" << endl;
    list.addCustomer("clay@cs.georgetown.edu","Clay");
    cout << "Didn't crash" << endl;
    cout << "Adding customer 2:" << endl;
    list.addCustomer("quinn@cs.georgetown.edu","Quinn");
    cout << "Didn't crash" << endl;
    cout << "Adding customer 3:" << endl;
    list.addCustomer("alex@cs.georgetown.edu","Alex");
    cout << "Didn't crash" << endl;

    // test show list
    cout << "About to test showList." << endl;
    cout << "To pass, the output should contain these three items (order doesn't matter)"
        << endl << endl;
    cout << setw(10) << "Alex" << setw(25) << "alex@cs.georgetown.edu" <<  endl;
    cout << setw(10) << "Quinn" << setw(25) << "quinn@cs.georgetown.edu" <<  endl;
    cout << setw(10) << "Clay" << setw(25) << "clay@cs.georgetown.edu" <<  endl;
    cout << "----------------------------------------------------------------" << endl;
    list.showList();
    cout << endl << endl;

    // test show emails
    cout << "About to test showEmails." << endl;
    cout << "To pass, the output should contain these three items (order doesn't matter)"
        << endl << endl;
    cout << setw(25) << "alex@cs.georgetown.edu" <<  endl;
    cout  << setw(25) << "quinn@cs.georgetown.edu" <<  endl;
    cout << setw(25) << "clay@cs.georgetown.edu" <<  endl;
    cout << "----------------------------------------------------------------" << endl;
    list.showEmails();
    cout << endl << endl;

    // test show names
    cout << "About to test showNames." << endl;
    cout << "To pass, the output should contain these three items (order doesn't matter)"
        << endl << endl;
    cout << setw(10) << "Alex"  <<  endl;
    cout << setw(10) << "Quinn" <<   endl;
    cout << setw(10) << "Clay"  <<  endl;
    cout << "----------------------------------------------------------------" << endl;
    list.showNames();
    cout << endl << endl;


    // test countNameAppearances
    bool pass = true;
    cout << "Testing countNameAppearances: " << endl;
    list.addCustomer("alex@cs.georgetown.edu","Alex");
    list.addCustomer("alex@cs.georgetown.edu","Alex");
    int count = list.countNameAppearances("Alex");
    if (count != 3) {
        cout << "ERR: countNameAppearances should have returned 3, but it returned: "
            << count << endl;
        pass = false;
    }

    if (pass) {
        count = list.countNameAppearances("Clay");
        if (count != 1) {
            cout << "ERR: countNameAppearances should have returned 1, but it returned: "
                << count << endl;
            pass = false;
        }
    }

    if (!pass){
        cout << "--> Fail" << endl;
    }
    else {
        cout << "--> Pass" << endl;
    }

    // test countEmailAppearances
    pass = true;
    cout << "Testing countEmailAppearances: " << endl;
    count = list.countEmailAppearances("alex@cs.georgetown.edu");
    if (count != 3) {
        cout << "ERR: countEmailAppearances should have returned 3, but it returned: "
            << count << endl;
        pass = false;
    }

    if (pass) {
        count = list.countEmailAppearances("clay@cs.georgetown.edu");
        if (count != 1) {
            cout << "ERR: countEmailAppearances should have returned 1, but it returned: "
                << count << endl;
            pass = false;
        }
    }

    if (!pass){
        cout << "--> Fail" << endl;
    }
    else {
        cout << "--> Pass" << endl;
    }

    // Testing delete customer
    cout << "Testing Delete Customer" << endl;
    count = list.deleteCustomer("alex@cs.georgetown.edu");
    if (count != 3){
        cout << "ERR: deleteCustomer should have returned 3, but it returned: "
            << count << endl;
    }
    count = list.deleteCustomer("clay@cs.georgetown.edu");
    if (count != 1){
        cout << "ERR: deleteCustomer should have returned 1, but it returned: "
            << count << endl;
    }
    cout << "If there was no crash, then it is a good sign" << endl;
    cout << "To pass, the output should contain only this item:"
        << endl << endl;
    cout << setw(10) << "Quinn" << setw(25) << "quinn@cs.georgetown.edu" <<  endl;
    cout << "----------------------------------------------------------------" << endl;
    list.showList();
    cout << endl << endl;

    cout << "NOTICE: This does not test the loadFile command." << endl
        << "That should be done by running the working main" << endl;

}
// */ // end comment out CustomerList test main


////////////////////////////////////////
// Print the menu so users know what options they have
void print_menu(){

    cout << endl << endl;
    cout << "Menu options:" << endl;
    cout << setw(50) << "Load a file:" << setw(3) << "L" << endl;
    cout << setw(50) << "Show file contents:" << setw(3) << "S" << endl;
    cout << setw(50) << "Show all emails:" << setw(3) << "R" << endl;
    cout << setw(50) << "Show all names:" << setw(3) << "M" << endl;
    cout << setw(50) << "Count name appearances:"
        << setw(3) << "C" << endl;
    cout << setw(50) << "Count email appearances:"
        << setw(3) << "V" << endl;
    cout << setw(50) << "Add a customer:" << setw(3) << "A" << endl;
    cout << setw(50) << "Delete an customer:" << setw(3) << "D" << endl;
    cout << setw(50) << "Exit:" << setw(3) << "X" << endl << endl;
    cout << "Your choice: ";

}

////////////////////////////////////////
void print_vector(vector<string> vec){

    for (int i = 0; i < vec.size(); i++){
        cout << setw(40) << vec[i] << endl;
    }

}