#include<stdio.h>
#include <string.h>
#include <stdlib.h>

struct Employee{
    char firstName[256];
    char lastName[256];
    int age;
    int sinNumber;
    char status;
};

struct Node{
    struct Employee employee;
    struct Node *next;
};

void initilizeList(struct Node* _head){
    _head = (struct Node*) malloc(sizeof(struct Node));
    _head = NULL;
    //_head->employee = initEmployee
}

int addEmployee(struct Node** _head, char _firstName[256], char _lastName[256], int _age, int _sinNum, char _status){
    struct Node *newNode;
    newNode = (struct Node*)malloc (sizeof(struct Node));
    //newNode->next =NULL;

    //initilizes the new node with the employee data
    strcpy(newNode->employee.firstName, _firstName);
    strcpy(newNode->employee.lastName, _lastName);
    newNode->employee.age = _age;
    newNode->employee.sinNumber = _sinNum;
    newNode->employee.status = _status;

    //tranverse to the end of the list
    if (*_head == NULL){
        *_head = newNode;
        return 1;
    }
    //struct Node* current = _head;

    //for (; current->next!=NULL;current = current->next);
    /*while(current!=NULL){
        current = current->next;
    }*/
    //current->next = newNode;
    newNode->next = *_head;
    *_head = newNode;

    return 1;
}
/*
int getnode(){


}

int removeEmployee(){



}*/

/*int Reapeated(struct Node* _head, int _times){


}*/

void DeleteExpt(struct Node** _head, char _lastName[256]){
    struct Node *newHead;
    newHead = (struct Node*) malloc (sizeof(struct Node));

    struct Node *current;
    current = (struct Node*) malloc (sizeof(struct Node));

    int count = 0;

    while((*_head)->next!=NULL){
        if (strcmp((*_head)->employee.lastName, _lastName)==0 && count ==0){
            newHead = *_head;
            newHead->next = current;
            count++;
        }
        else if (strcmp((*_head)->employee.lastName, _lastName)==0){
            //struct Node *temp;
            //temp = (struct Node*) malloc (sizeof(struct Node));
            current->next = *_head;
            current = current ->next;
        }
    }

    *_head = newHead;
}

void displayList(struct Node *head){
    for(struct Node* current = head;current!=NULL;current=current->next)
        printf("%s, %s\n%d\n%d\n%c\n", current->employee.lastName, current->employee.firstName, current->employee.age, current->employee.sinNumber, current->employee.status);
    printf("\n");
}

void displayList1(struct Node* _head, int _age){
    for (struct Node* current = _head;current !=NULL; current= current->next){
        if (current->employee.age > _age)
            //displayEmployee
            printf("%s, %s\n%d\n%d\n%c\n", current->employee.lastName, current->employee.firstName, current->employee.age, current->employee.sinNumber, current->employee.status);
    }
    printf("\n");
}

void displayList2(struct Node* _head, char _status){
    struct Node* current = _head;
    while(current !=NULL){
        if (current->employee.status == _status)
            //displayEmployee
            printf("%s, %s\n%d\n%d\n%c\n", current->employee.lastName, current->employee.firstName, current->employee.age, current->employee.sinNumber, current->employee.status);
        current = current->next;
    }
    printf("\n");
}


int main (){
    struct Node *head;

    head = (struct Node*) malloc (sizeof(struct Node));
    head = NULL;
    //initilizeList(head);

    int age;
    int sinNum;
    char firstName [256];
    char lastName [256];
    char status;

    char temp;

    for (int i =1;;i++){
        printf("Enter the first name of Employee #%d. Enter 'q' to stop entering employees.\n", i);
        scanf("%s%c", firstName, &temp);
        //printf("\n%s\n", firstName);
        if (strcmp(firstName,"q")==0)
            break;
        printf("Enter his/her last name.\n");
        scanf("%s%c", lastName, &temp);

        printf("Enter his/her age\n");
        scanf("%d%c", &age, &temp);

        printf("Enter his/her SIN number\n");
        scanf("%d%c", &sinNum, &temp);

        printf("Enter the status of the employee 'a' active, 's' suspended, 't' terminated.\n");
        //status = getchar();
        scanf("%c%c", &status, &temp);
        addEmployee(&head, firstName, lastName, age, sinNum, status);
        displayList(head);
    }

    displayList1(head, 50);
    displayList2(head, 'a');






    return 0;
}