#include <iostream>
#include <cctype>
#include <cstring>
#include <random>
using std::cout;
using std::cin;
using std::endl;

//Protoypes
void display_options();
float convert(float input, float output, float amount);
void run_conversion(char again);
void currency_menu();
void guessing_game();
void temperature_logger();

//Loop to run the conversion while the user wants to
void run_conversion(char again)
{
	while (toupper(again) != 'N')
	{
		float input_choice = 0;
		float output_choice = 0;
		float conversion = 0.0;
		float amount = 0.0;

		cout << "Choose your input currency: ";
		currency_menu();
		cin >> input_choice;
		cin.ignore(100, '\n');
		cout << "\nchoose your output currency: ";
		cin >> output_choice;
		cin.ignore(100, '\n');
		cout << "\nWhat is the amount you would like to convert: ";
		cin >> amount;
		cin.ignore(100, '\n');
		conversion = convert(input_choice, output_choice, amount);
		cout << "In the new currency, that amount is " << conversion << std::endl;
		cout << "\nDo you want to use the conversion tool again? (Y/N): ";
		cin >> again;
		cin.ignore(100, '\n');
		if (toupper(again) != 'Y')
		{
			cout << "Thank you for using the currency conversion tool! \n\n";
		}
	}
}

//Conversion Calculator
float convert(float input, float output, float amount)
{
	float converted_amount = 0.0;
	struct currencies
	{
		const float GBP = 0.80;
		const float Euro = 0.94;
		const float Yen = 152.22;
		const float AUD = 1.55;
		const float USD = 1;
	};

	currencies currency;

	if (input == output)
	{
		return amount;
	}
	if (input == 1)
	{
		input = currency.GBP;
	}
	else if (input == 2)
	{
		input = currency.Euro;
	}
	else if (input == 3)
	{
		input = currency.Yen;
	}
	else if (input == 4)
	{
		input = currency.AUD;
	}
	else if (input == 5)
	{
		input = currency.USD;
	}

	if (output == 1)
	{
		output = currency.GBP;
	}
	else if (output == 2)
	{
		output = currency.Euro;
	}
	else if (output == 3)
	{
		output = currency.Yen;
	}
	else if (output == 4)
	{
		output = currency.AUD;
	}
	else if (output == 5)
	{
		output = currency.USD;
	}

	converted_amount = output / input * amount;
	return converted_amount;
}

//Menu display
void currency_menu()
{
	cout << "\n\n1. GBP\n";
	cout << "2. Euro\n";
	cout << "3. Yen\n";
	cout << "4. AUD\n";
	cout << "5. USD\n\n";
}

//guessing game function
void guessing_game()
{
	std::random_device dev;
	std::mt19937 rng(dev());
	std::uniform_int_distribution<std::mt19937::result_type> dist6(1, 10000);

	int random_number = dist6(rng);
	int user_guess = 0;
	int guess_counter = 1;

	cout << "Welcome to the Guessing Game!" << endl;
	cout << "I have selected a number between 1 and 10000, you have 20 tries to guess it!" << endl;
	cout << "" << endl;

	//cout << "hint: " << random_number << endl;
	cout << "Enter your guess: ";
	cin >> user_guess;
	cin.ignore(100, '\n');

	while (user_guess != random_number && guess_counter != 20)
	{
		if (user_guess > random_number)
		{
			cout << "Lower!";
			cout << "Tries left: " << (20 - guess_counter) << endl;
			cout << "\n";
		}
		else
		{
			cout << "Higher!";
			cout << "Tries left: " << (20 - guess_counter) << endl;
			cout << "\n";
		}
		guess_counter++;
		cout << "Enter your guess: ";
		cin >> user_guess;
		cin.ignore(100, '\n');
	}

	if (guess_counter == 20)
	{
		cout << "Sorry! You didn't guess it in time. The answer was " << random_number << "\n" << endl;
	}
	else
		cout << "You got it!\n" << endl;
}


void temperature_logger()
{
	const int size = 7;
	struct dailyTemps
	{
		float temperature_high;
		float temperature_low;
	};

	dailyTemps week[size];

	int day_counter = 1;


	for (int i = 0; i < size; i++)
	{
		cout << "Enter high temperature for day " << day_counter << ": ";
		cin >> week[i].temperature_high;
		cin.ignore(100, '\n');
		cout << "Enter low temperature for day " << day_counter << ": ";
		cin >> week[i].temperature_low;
		cin.ignore(100, '\n');
		day_counter++;
	}


	float sum_high = 0.0;
	float sum_low = 0.0;
	float lowest = week[0].temperature_low;
	float highest = week[0].temperature_high;
	float largest_difference = 0.0;
	float average_temp = 0.0;

	for (int i = 0; i < size; i++)
	{
		sum_high += week[i].temperature_high;
		sum_low += week[i].temperature_low;

		if (week[i].temperature_high > highest)
		{
			highest = week[i].temperature_high;
		}

		if (week[i].temperature_low < lowest)
		{
			lowest = week[i].temperature_low;
		}

		float difference = week[i].temperature_high - week[i].temperature_low;
		if (difference > largest_difference)
		{
			largest_difference = difference;
		}
	}

	average_temp = (sum_high/ size + sum_low / size) / 2;

	cout << "\nAverage temperature of the week: " << average_temp << "'F" << endl;
	cout << "\nLargest Difference in High/Low Temperature in a Day: " << largest_difference << endl;
	cout << "\nLowest Temperature of the Week: " << lowest << "'F" << endl;
	cout << "\nHighest Temperature of the Week: " << highest << "'F\n" << endl;
}