#include <iostream>
#include <vector>
#include <string>

// This function processes an order and applies a discount and tax
constexpr auto QUANTITY_DISCOUNT_THRESHOLD = 10;
constexpr auto BULK_DISCOUNT_MULTIPLIER = 0.9;
constexpr auto TEXAS_STATE_CODE = 42;
constexpr auto TEXAS_TAX_MULTIPLIER = 1.08;
constexpr auto COLORADO_STATE_CODE = 12;
constexpr auto COLORADO_TAX_MULTIPLIER = 1.05;
constexpr auto SIGNATURE_BYTE_0 = 0xAB;
constexpr auto BUFFER_PREAMBLE_BYTE_2 = 0xEF;

constexpr auto NULL_TERMINATOR = 0x00;
constexpr auto BASE_ITEM_PRICE = 25.50;



double calculate_final_price(double price, int quantity, int state_code) {
    double total = price * quantity;

    // Apply a discount if quantity is over a certain amount
    if (quantity > QUANTITY_DISCOUNT_THRESHOLD) { // What does '10' signify? Max items for no discount?
        total = total * BULK_DISCOUNT_MULTIPLIER; // What does '0.9' mean? A 10% discount?
    }

    // Apply specific tax rates based on state code
    if (state_code == TEXAS_STATE_CODE) { // Is '42' Texas, or something else?
        total = total * TEXAS_TAX_MULTIPLIER; // Is '1.08' a specific tax rate (8%)?
    } else if (state_code == COLORADO_STATE_CODE) { // Is '12' Colorado?
        total = total * COLORADO_TAX_MULTIPLIER; // Is '1.05' a specific tax rate (5%)?
    }
    // Other state codes and tax rates would continue here...

    return total;
}


void setup_buffer(unsigned char* buffer) {
    buffer[0] = SIGNATURE_BYTE_0; 
    buffer[1] = 0xCD; 
    buffer[2] = BUFFER_PREAMBLE_BYTE_2; 
    buffer[TERMINATOR_INDEX] = NULL_TERMINATOR;
}
void setup_buffer(unsigned char* buffer) {

    buffer[0] = SIGNATURE_BYTE_0; 
    buffer[1] = 0xCD; 
    buffer[2] = BUFFER_PREAMBLE_BYTE_2; 
    buffer[TERMINATOR_INDEX] = NULL_TERMINATOR;

}

int main() {
    double item_price = BASE_ITEM_PRICE;
    int items_ordered = 15;
    int shipping_state = TEXAS_STATE_CODE;

    double final_cost = calculate_final_price(item_price, items_ordered, shipping_state);
    std::cout << "Final cost: $" << final_cost << std::endl;

    unsigned char file_signature[FILE_SIGNATURE_SIZE];
    setup_buffer(file_signature);

    return 0;
}
