// Deposit.cpp
// Member-function definitions for class Deposit.
#include "Deposit.h" // Deposit class definition
#include "Screen.h" // Screen class definition
#include "BankDatabase.h" // BankDatabase class definition
#include "Keypad.h" // Keypad class definition
#include "DepositSlot.h" // DepositSlot class definition

const static int CANCELED = 0; // constant representing cancel option 

// Deposit constructor initializes class's data members
Deposit::Deposit( int userAccountNumber, Screen &atmScreen, 
   BankDatabase &atmBankDatabase, Keypad &atmKeypad, 
   DepositSlot &atmDepositSlot )
   : Transaction( userAccountNumber, atmScreen, atmBankDatabase ),
     keypad( atmKeypad ), depositSlot( atmDepositSlot )
{
   // empty body
} // end Deposit constructor

// performs transaction; overrides Transaction's pure virtual function 
void Deposit::execute()
{
   BankDatabase &bankDatabase = getBankDatabase(); // get reference
   Screen &screen = getScreen(); // get reference

   amount = promptForDepositAmount(); // get deposit amount from user

   // check whether user entered a deposit amount or canceled
   if ( amount != CANCELED )
   {
      // request deposit envelope containing specified amount
      screen.displayMessage( 
         "\nPlease insert a deposit envelope containing " );
      screen.displayDollarAmount( amount );
      screen.displayMessageLine( " in the deposit slot." );

      // receive deposit envelope
      bool envelopeReceived = depositSlot.isEnvelopeReceived();

      // check whether deposit envelope was received
      if ( envelopeReceived )
      {  
         screen.displayMessageLine( "\nYour envelope has been received."
            "\nNOTE: The money just will not be available until we"
            "\nverify the amount of any enclosed cash, and any enclosed "
            "checks clear." );
         
         // credit account to reflect the deposit
         bankDatabase.credit( getAccountNumber(), amount ); 
      } // end if
      else // deposit envelope not received
      {
         screen.displayMessageLine( "\nYou did not insert an "
            "envelope, so the ATM has canceled your transaction." );
      } // end else
   } // end if 
   else // user canceled instead of entering amount
   {
      screen.displayMessageLine( "\nCanceling transaction..." );
   } // end else
} // end function execute

// prompt user to enter a deposit amount in cents 
double Deposit::promptForDepositAmount() const
{
   Screen &screen = getScreen(); // get reference to screen

   // display the prompt and receive input
   screen.displayMessage( "\nPlease enter a deposit amount in " 
      "CENTS (or 0 to cancel): " );
   int input = keypad.getInput(); // receive input of deposit amount
   
   // check whether the user canceled or entered a valid amount
   if ( input == CANCELED ) 
      return CANCELED;
   else
   {
      return static_cast< double >( input ) / 100; // return dollar amount 
   } // end else
} // end function promptForDepositAmount


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