#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

// DO_2: Define the constant APPLE_PRICE, ORANGE_PRICE and WIDTH
const float W_MELON_PRICE = 30.00f;
const float MANGO_PRICE = 30.25f;
const float GRAPES_PRICE = 35.25f;
const float APPLE_PRICE = 20.00f;
const float ORANGE_PRICE = 25.25f;
const float WIDTH = 10.00f;

// state taxes
const float IN_TAX = 0.04f;
const float IL_TAX = 0.05f;
const float WI_TAX = 0.06f;

// price discounts
const float DISCOUNT_TWO = 0.12F;
const float DISCOUNT_THREE = 0.13F;
const float DISCOUNT = 0.1F;

// DO_3: Complete the prototype for Calculate_Total function and
//       Calculate_Discount function, See function definition and
//       functions' calls below.
void Display_Price(int code);
float Calculate_Tax(float total);
float Calculate_Total(int code, float total);
float Calculate_Discount(float total);
// functions for getting and checking the variable code
int Get_Code();
bool Valid_Code(int code);

int main()
{
   int code;
   float total = 0;
   cout << "=========Welcome to our Market========" << endl;

// DO_4:  Provide the priming read for the Sentinel Control Loop
//        Look at the while statement below for details on what is
//        necessary. Hint, you need to call get_code() function before
//        entering the while loop.

   code = Get_Code();
   while (code != -1)
   {
        // DO_5:  Call function Display_Price
	  Display_Price(code);
      total = Calculate_Total(code, total);

      // DO_6:  Call function Get_Code ().
	  // Assign the returned value to code
	  code = Get_Code();
	  cout << endl;

   }

   cout << "Total: " << total << endl;
   total -= Calculate_Discount(total);
   cout << "Total with discount: " << total << endl;
   total += Calculate_Tax(total);
   cout << "Total with tax: " << total << endl;
   cout << endl;
   return 0;

}

//---------------------------------------------------------------------
// Function to display the price for the selections
// params: in
//-------------------------------------------------------------------

void Display_Price(int code)
{
	cout << setw(WIDTH) << code << setw(WIDTH);

	if (code == 101)
		cout << "Apple" << setw(WIDTH) << '$' << APPLE_PRICE << endl;
	else if (code == 102)
		cout << "Orange" << setw(WIDTH) << '$' << ORANGE_PRICE << endl;

	// DO_7:  Complete the function body for display_price.
	//        Check the other values of 103, 104 for the variable code.
	//        Set the width for each output according to the
	//        sample run in Lab6.txt

	else if (code == 103)
		cout << "Grapes" << setw(WIDTH) << '$' << GRAPES_PRICE << endl;
	else if (code == 104)
		cout << "W.Melon" << setw(WIDTH) << '$' << W_MELON_PRICE << endl;


	else
		cout << "Mango" << setw(WIDTH) << '$' << MANGO_PRICE << endl;
}

//---------------------------------------------------------------------
// Function to calculate the total
// parms: in, in
//-------------------------------------------------------------------
// DO_8:  Complete the function header for Calculate_Total.
//         Check the function prototype for details on this function.
  float Calculate_Total(int code,float total )
{
   if (code == 101)
      total += APPLE_PRICE;
   else if (code == 102)
      total += ORANGE_PRICE;
   else if (code == 103)
      total += GRAPES_PRICE;
   else if (code == 104)
      total += W_MELON_PRICE;
   else if (code == 105)
      total += MANGO_PRICE;
   else
      total += 0;
   return total;
}

//---------------------------------------------------------------------
// Function to calculate the tax for the total
// also it asks for the state, applies new tax.
// cin is used to get the "state" variable in this
// function
// params: in
//---------------------------------------------------------------------

float Calculate_Tax(float total)
{
   float tax = 0;

   string state;
   bool state_recognized = false;

   while (!state_recognized && total != 0)
   {
      cout << endl << "Please enter the state you are in : ";
      cin >> state;
      cout << endl;

      if (state == "Indiana" || state == "indiana" || state == "IN")
      {
         tax = total * IN_TAX;
         state_recognized = true;
      }
      else if (state == "Illinois" || state == "illinois"
         || state == "IL")
      {
         tax = total * IL_TAX;
         state_recognized = true;
      }
      else if (state == "Wisconsin" || state == "wisconsin"
         || state == "WI")
      {
         tax = total * WI_TAX;
         state_recognized = true;
      }
      else
      {
         cout << endl << "State not recognized." ;
         state_recognized = false;
      }

   }

   return tax;
}

//---------------------------------------------------------------------
// Function to calculate the discount if the total >$100.
// discount conditions for beween $100 and $200,
// between $200 and $350, and greater than 350
// params: in
//---------------------------------------------------------------------

float Calculate_Discount(float total)
{
   if (total < 100)
      return 0;
   else if (total >= 100 && total < 200)
      return total * DISCOUNT;
   else if (total >= 200 && total < 350)
      return total * DISCOUNT_TWO;
   else
      return total * DISCOUNT_THREE;

}

//---------------------------------------------------------------------
// function that gets the code, and then validates the code by
// using the Valid_Code() function. The code loops until a valid code
// or the exit command is entered.
// params: in
//---------------------------------------------------------------------

int Get_Code()
{
   int out_code;
   bool good_code = false;
   while (!good_code)
   {
	   cout << endl << "Enter Code:";
      cin >> out_code;
      good_code = Valid_Code(out_code);
   }

   return out_code;

}

//---------------------------------------------------------------------
// function to check whether the code is valid, using the same
// bounds as the checking in the other functions, and replaces the
// redundant error output from the Display_Price() function
// params: in
//---------------------------------------------------------------------

bool Valid_Code(int code)
{
   if (code >= 101 && code <= 105 || code == -1)

      return true;

   else
   {
      cout << "Incorrect code !!!! " << endl;
      return false;
   }

}