#include <stdio.h>
#include <string.h>
#include "operationHandler.h"

char buffer[100];

int main() {
    printf("Please enter the id of a specific operation...\n1. addition\n2. subtraction\n3. multiplication\n4. division\n");

    // input for math operation as integer
    int input;
    scanf("%d", &input);

    // check if operation input is valid
    if(!checkOperationInput(input)) {
        printf("Invalid operation id\n");
        return 0;
    }

    printf("\nPlease enter the first and the second number separated by a space...\n");

    // loop to enter numbers for calculation
    while(fgets(buffer, 100, stdin)) {
        buffer[strcspn(buffer, "\n")] = '\0';
        if (strlen(buffer) > 0) {
            break;
        }
    }

    // extracting numbers from input
    int* result = evaluateInput(buffer, input);

    if(result == NULL) {
        printf("\nInvalid formatting. Two numbers need to be separated by a space\n");
        return 0;
    }
    printf("\nResult: %d", *result);
}