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


struct inventory_item
{
	char productName[50];
	int quantity;
	float price;
	char id[9];
	char date[15];
};


int readFile(char filename[], struct inventory_item inventory_list[]);
int getTotalItems(struct inventory_item inventory_list[], int count);
double getTotalVal(struct inventory_item inventory_list[], int count);

void printItem(struct inventory_item item)
{
	// This is an optional function
}

int main(int argc, char *argv[])
{
	if (argv[1] == NULL)
	{
		printf("Error: file not specified\n Format: ./a.out <input-file\n");
		return 0;
	}
	if (argc == 2)
	{
		struct inventory_item inventory_list[100];
		int count = readFile(argv[1], inventory_list);
		int totalNumItem = getTotalItems(inventory_list, count);
		float totalVal = getTotalVal(inventory_list, count);
		printf("Total inventory value: $%.2f\n", totalVal);
		printf("Total inventory quantity: %d\n", totalNumItem);
	}
	if (argc != 2)
	{
		printf("Error: Unable to open file %s/n", argv[1]);
	}
	return 0;
}

int readFile(char filename[], struct inventory_item inventory_list[])
{
	int i = 0;
	int numberItems = 0;
	FILE * ifp = fopen(filename, "r");

	fscanf(ifp, "%d", &numberItems);
	printf("%d\n", numberItems);

	for(i = 0; i < numberItems; i++)
	{
		fscanf(ifp, "%s", &inventory_list[i].productName);
		printf("%s\n", inventory_list[i].productName);

		fscanf(ifp, "%d", &inventory_list[i].quantity);
		printf("%d\n", inventory_list[i].quantity);

		fscanf(ifp, "%.2f", &inventory_list[i].price);
		printf("%.2f\n", inventory_list[i].price);

		fscanf(ifp, "%s", &inventory_list[i].date);
		printf("%s\n", inventory_list[i].date);
	}

	fclose(ifp);
	return numberItems;
}

int getTotalItems(struct inventory_item inventory_list[], int count)
{
	int totprod = 0;
	for(int i = 0; i < count; i++)
	{
		printf("%d\n", inventory_list[i].quantity);
		totprod += inventory_list[i].quantity;
	}
	return totprod;
}

double getTotalVal(struct inventory_item inventory_list[], int count)
{

}