#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define LENGTH 80
#define TRUE

struct produceItem
{
    char produce[20];
    char type[20];
    char soldBy[20];
    float price;
    int quantityInStock;
    struct produceItem *next;
};

void menu();

int main() {
    menu();
    return 0;
}

void addProduceItem(struct produceItem **, char *, char *, char *, float, int);
void count(void);
void display(struct produceItem *);
void readDataFile(struct produceItem **);
void recursiveReverse(struct produceItem **);
char * trim(char *c);
void writeDataFile(struct produceItem *);


void addProduceItem (struct produceItem **headRef, char *produce, char *type, char *soldBy, float price, int quantity)
{

    struct produceItem* temp = (struct produceItem *) malloc(sizeof(struct produceItem));
    strcpy(temp->produce,produce);
    strcpy(temp->type, type);
    strcpy(temp->soldBy, soldBy);
    temp->price = price;
    temp ->quantityInStock = quantity;
    temp->next = (*headRef);
    (*headRef) = temp;
}


void display(struct produceItem *headRef)
{
    struct produceItem *helper = headRef;

    if (helper ==NULL)
    {
        return;

    }
    else
    {
        printf("=======================================================\n");
        printf(" Item #    Produce    Type   Sold By    Price  In Stock\n");
        printf("=======================================================\n");
    }
    int counter = 1;
    while(helper !=NULL)
    {
        printf("%5d %3s %-13s %-16s %-13s %6.2f %8d \n",
               counter++, " ", helper->produce, helper->type,
               helper->soldBy, helper->price, helper->quantityInStock);
        helper = helper->next;

    }
    printf("\n");

}


void readDataFile(struct produceItem **headRef)
{

    const char comma[2] = ",";
    char dataLine[LENGTH];
    char *produce;
    char *type;
    char *soldBy;
    float price;
    int quantityInStock;
    char *fileName = "Assignment8Input.txt";

    printf("Trying to open file %s\n", fileName);
    FILE *filePointer = fopen("Assignment8Input.txt", "r");
    if (filePointer == 0) {
        perror("fopen");
        exit(1);
    }
    while (fgets(dataLine, LENGTH, filePointer) !=NULL)
    {
        produce = trim(strtok(dataLine, ","));
        type = trim(strtok(NULL, ","));
        soldBy = trim(strtok(NULL,","));
        price = atof(trim(strtok(NULL,",")));
        quantityInStock = atoi (trim(strtok(NULL,",")));


        addProduceItem(headRef, produce, type, soldBy, price, quantityInStock);

    }
    fclose(filePointer);
}


void recursiveReverse(struct produceItem** head_ref)
{
    struct produceItem* first;
    struct produceItem* rest;
}


char * trim(char *c)
{
    char * e = c + strlen(c) - 1;

    while(*c && isspace(*c))
        c++;

    while(e > c && isspace(*e))
        *e-- = '\0';

    return c;
}

void menu()
{
    int menu_selection = 0;
    printf("List Operations\n");
    printf("===============\n");
    printf("1. Stock Produce Department\n");
    printf("2. Display Produce Inventory ~ Stack\n");
    printf("3. Display Produce Inventory ~ Queue\n");
    printf("4. Pop 10 Elements Off Stack and Output\n");
    printf("5. Dequeue 15 Elements Off Queue and Output\n");
    printf("6. Exit Program\n");
    printf("Enter your choice:");
    scanf("%d",&menu_selection);
    switch (menu_selection) {
        case 1:
            readDataFile(0);
            break;
        default:
            printf("Invalid Option");
    }
}