#ifndef STD_LIB_H
#define STD_LIB_H
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<stdbool.h>
#include<math.h>
#include<time.h>
#include<ctype.h>
#include <stddef.h>
#endif
void welcome_message(){
    printf("><Welcome to the Student Union POS system><\n");//welcome messgae
}

int choices_selecter(char * Items[],int items,char * welcome_messages ){
  int choice = 0;
  do{
  	system("cls");

    if (welcome_messages !=NULL){
    	printf("%s",welcome_messages);
	}
	printf("Select An Option:\n");
    int i;
    for (i=0; i<items;i++){
      printf("%d. %s\n",i+1,Items[i]);
    }
    printf("%d. Exit\n",i+1);
    printf(">");
  	fflush(stdin);
    scanf("%d",&choice);
    if(choice < 1 || choice > items+1){
        printf("Invalid choice...press any key to retry....\n");
        fflush(stdin);
        getchar();
    }
  }while(choice < 1 || choice > items+1);
  return choice;

}

char* prompt_item(char* prompt){
    char* item = malloc(sizeof(char) * 100);
    do{
        printf("%s",prompt);
        fflush(stdin);
        scanf("%[^\n]",item);
        if(strcmp(item,"") == 0){
            printf("Invalid input, try again?(y/n)\n");
            char temp[100];
            fflush(stdin);
            scanf("%[^\n]",temp);
            if(strcmp(temp,"n") == 0){
                return NULL;
            }
        }
    }while(strcmp(item,"") == 0);
    return item;
}
typedef enum{
  INT=1,STRING=2,LONG=3,FLOAT=4
}INPUT_TYPE;
bool item_inputer(char * varname,INPUT_TYPE type,void * item){
  char output[1024] = "Please input the ";
  strcat(output,varname);
  strcat(output,": \n>");
  char* temp = prompt_item(output);
  if(temp == NULL){
        return false;
  }
  switch(type){
    case INT:
      item = atoi(temp);
      break;
    case STRING:
      strcpy(item,temp);
      break;
    case LONG:
      item = atol(temp);
      break;
    case FLOAT:
      item = atof(temp);
      break;
    default:
      return false;
  }
  return true;
}
//check if strcasestr is define in current environment
//if not, define it
#ifndef HAVE_STRCASESTR
char *strcasestr(const char *s, const char *find)
{
char c, sc;
size_t len;

if ((c = *find++) != 0) {
c = tolower((unsigned char)c);
len = strlen(find);
do {
do {
if ((sc = *s++) == 0)
return (NULL);
} while ((char)tolower((unsigned char)sc) != c);
} while (strncasecmp(s, find, len) != 0);
s--;
}
return ((char *)s);
}
#endif