#include <stdio.h>

/*
What goes where, listed as: Function [Menu Option]

Cashier:
  list of available products [1]
  list of available services [2]
  invoices [3] (includes adding new customers)
  modify customer information [4]
Supervisor:
  insert products/services/suppliers [5]
  update tech w/service capabilities [7]
  update service time [5]
  inventory rpt [0]
  supplier rpt [0]
  customer rpt [0]
  inventory turnover report [0]
Manager:
  hire/fire technicians [7]
  change service rate [5]
  financial report (from transactions) [0]
*/

void main()
{
  do_main_menu();
}

char get_choice(char *choices)
{
  char c=1, x;
  while(!index(choices, c)) {
    c = toupper(getchar());
    if(c=='\n') continue;
    x = getchar();
    while(x!='\n') x = getchar();
  }
  return c
}

void do_main_menu()
{
  char choice=0;

  while(1) {

  printf("+------------------------------------------+\n");
  printf("| 1] List products available               |\n");
  printf("| 2] List services available               |\n");
  printf("| 3] Build an invoice                      |\n");
  printf("| 4] Modify customer information           |\n");
  printf("| 5] Add/Remove/Update a product/service   |\n");
  printf("| 6] Add/Remove/Update a supplier          |\n");
  printf("| 7] Add/Remove/Update employees           |\n");
  printf("|                                          |\n");
  printf("| Q] Exit                                  |\n");
  printf("+------------------------------------------+\n");

  printf("\nChoice: ");

  choice = get_choice("12345670Q");
  switch (choice) {
    case '1':
/*      list_products();*/
      break;
    case '2':
/*      list_services();*/
      break;
    case '3':
/*      build_invoice();*/
      break;
    case '4':
/*      do_customer_menu();*/
      break;
    case '5':
      do_product_menu();
      break;
    case '6':
/*      do_supplier_menu();*/
      break;
    case '7':
      do_employee_menu();
      break;
    case '0':
      do_reports_menu();
    case 'Q':
      return;
  }
  }
}

void do_reports_menu()
{
  char choice=0;

  while(1) {

  printf("+------------------------+\n");
  printf("| 1] Inventory report    |\n");
  printf("| 2] Supplier report     |\n");
  printf("| 3] Customer report     |\n");
  printf("| 4] Financial summary   |\n");
  printf("|                        |\n");
  printf("| 0] Return to previous  |\n");
  printf("+------------------------+\n");

  printf("\nChoice: ");

  choice = get_choice("12340");
  switch (choice) {
    case '1':
/*      do_inventory_report();*/
      break;
    case '2':
/*      do_supplier_report();*/
      break;
    case '3':
/*      do_customer_report();*/
      break;
    case '4':
      do_financial_summary();
      break;
    case '0':
      return;
  }
  }
}

void do_employee_menu()
{
  char choice=0;

  while(1) {

  printf("+-------------------------------------+\n");
  printf("| 1] Add a new technician             |\n");
  printf("| 2] Remove a technician              |\n");
  printf("| 3] Update a technician's skill set  |\n");
  printf("|                                     |\n");
  printf("| 0] Return to previous               |\n");
  printf("+-------------------------------------+\n");

  printf("\nChoice: ");

  choice = get_choice("1230");
  switch (choice) {
    case '1':
      do_add_employee();
      break;
    case '2':
      do_remove_employee();
      break;
    case '3':
      /* Call Cristi's employee-update function */
      break;
    case '0':
      return;
  }
  }
}

void do_product_menu()
{
  char choice=0;

  while(1) {

  printf("+------------------------+\n");
  printf("| 1] Add a product       |\n");
  printf("| 2] Remove a product    |\n");
  printf("| 3] Update a product    |\n");
  printf("| 4] Add a service       |\n");
  printf("| 5] Remove a service    |\n");
  printf("| 6] Update a service    |\n");
  printf("|                        |\n");
  printf("| 0] Return to previous  |\n");
  printf("+------------------------+\n");

  printf("\nChoice: ");

  choice = get_choice("1230");
  switch (choice) {
    case '1':
/*      do_add_product();*/
      break;
    case '2':
/*      do_remove_product();*/
      break;
    case '3':
/*      do_update_product();*/
      break;
    case '4':
/*      do_add_service();*/
      break;
    case '5':
/*      do_remove_service();*/
      break;
    case '6':
      do_update_service();
      break;
    case '0':
      return;
  }
  }
}