//Ciphers/main.cpp
//Matthew Ellison
// Created: 4-25-18
//Modified: 4-25-18
//This file contains the driver function and the test functions for the Cipher program
//This program will use some simple ciphers that are no longer widely used but still fun to play with


///The header files
#include "Headers/Caesar.hpp"
#include "Headers/Playfair.hpp"
#include <iostream>
#include <string>


///Test definitions
#define TEST_VERSION

#ifdef TEST_VERSION
#define CAESAR_TEST
#define PLAYFAIR_TEST
enum codingState { ENCODE, DECODE };
std::string testingError(codingState type, const std::string& input, const std::string& output, const std::string& cipher);
#endif //TEST_VERSION definition

#ifdef CAESAR_TEST
bool caesarTest(std::string& errorString);
#endif //CAESAR_TEST

#ifdef PLAYFAIR_TEST
bool playfairTest(std::string& errorString);
#endif //PLAYFAIR_TEST



//Main functions
#ifdef TEST_VERSION
int main(int argc, char** argv){
	bool testResult = false;
	std::string resultString = "";
	std::string errorString = "";

	//Testing the Caesar Cipher
	#ifdef CAESAR_TEST
	testResult = caesarTest(errorString);
	//If the test was successful
	if(testResult){
		resultString += "Caesar Cipher completed successfully\n";
	}
	else{
		resultString += "Caesar Cipher error:\n" + errorString;
	}
	std::cout << "Test1: " << resultString << std::endl;
	//Reset the variables
	errorString = "";
	testResult = false;
	#endif //CAESAR_TEST

	//Testing the playfair cipher
	#ifdef PLAYFAIR_TEST
	testResult = playfairTest(errorString);
	if(testResult){
		resultString += "Playfair Cipher completed successfully\n";
	}
	else{
		resultString += "Playfair Cipher error: " + errorString;
	}
	errorString = "";
	testResult = false;
	#endif //PLAYFAIR_TEST

	std::cout << "Results:\n" << resultString << std::endl;
	std::cin.get();

	return 0;
}

std::string testingError(codingState type, const std::string& input, const std::string& output, const std::string& cipher){
	std::string errorMessage;
	//Decide if it was encoding or decoding
	if(type == ENCODE){
		errorMessage = "Encoding:";
	}
	else if(type == DECODE){
		errorMessage = "Decoding:";
	}
	else{
		errorMessage = "We gots problems";
	}
	errorMessage += "\nError in: " + input + "\nExpected: " + output + "\nActual:   " + cipher + '\n';

	return errorMessage;
}


#ifdef CAESAR_TEST
bool caesarTest(std::string& errorString){
	///Add something in error message about shift amount
	Caesar cipher;
	bool passed = true;
	std::string inputString = "";	//Holds the string to be input into the cipher
	std::string outputString = "";	//Holds the string that the cipher is expected to output
	std::string cipherString = "";	//Holds the string that the cipher actually output

	///All lowercase
	inputString = "abcdefghijklmnopqrstuvwxyz";	//Shift = 3
	outputString = "defghijklmnopqrstuvwxyzabc";	//Shift = 3
	//Try it forwards
	cipherString = cipher.encode(3, inputString);
	if(cipherString != outputString){
		//errorString += "Encoding:\nError in: " + inputString + "\nExpected: " + outputString + "\nActual:   " + cipherString + '\n';
		errorString += testingError(ENCODE, inputString, outputString, cipherString);
		passed = false;
	}
	//Try it backwards
	cipherString = cipher.decode(3, outputString);
	if(cipherString != inputString){
		//errorString += "Decoding:\nError in: " + outputString + "\nExpected: " + inputString + "\nActual:   " + cipherString + '\n';
		errorString += testingError(DECODE, outputString, inputString, cipherString);
		passed = false;
	}

	///All upercase
	inputString = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	outputString = "XYZABCDEFGHIJKLMNOPQRSTUVW";
	//Try it forwards
	cipherString = cipher.encode(-3, inputString);
	if(cipherString != outputString){
		errorString += testingError(ENCODE, inputString, outputString, cipherString);
		passed = false;
	}
	//Try it backwards
	cipherString = cipher.decode(-3, outputString);
	if(cipherString != inputString){
		errorString += testingError(DECODE, outputString, inputString, cipherString);
		passed = false;
	}

	///Both cases
	inputString = "AbCdEfGhIjKlMnOpQrStUvWxYz";
	outputString = "DeFgHiJkLmNoPqRsTuVwXyZaBc";
	//Try it forwards
	cipherString = cipher.encode(3, inputString);
	if(cipherString != outputString){
		errorString += testingError(ENCODE, inputString, outputString, cipherString);
		passed = false;
	}
	//Try it backwards
	cipherString = cipher.decode(3, outputString);
	if(cipherString != inputString){
		errorString += testingError(DECODE, outputString, inputString, cipherString);
		passed = false;
	}

	///Punctuation
	inputString = "abc,def. rst; wxyz";
	outputString = "def,ghi. uvw; zabc";
	//Try it forwards
	cipherString = cipher.encode(3, inputString);
	if(cipherString != outputString){
		errorString += testingError(ENCODE, inputString, outputString, cipherString);
		passed = false;
	}
	//Try it backwards
	cipherString = cipher.decode(3, outputString);
	if(cipherString != inputString){
		errorString += testingError(DECODE, outputString, inputString, cipherString);
		passed = false;
	}

	return passed;
}
#endif //CAESAR_TEST

#ifdef PLAYFAIR_TEST
bool playfairTest(std::string& errorString){
	bool passed = true;
	std::string keyword, inputString, outputString, cipherString;
	Playfair cipher;

	//Test from wikipedia
	keyword = "Playfair Example";
	inputString = "Hide the gold in the tree stump";
	outputString = "BMODZBXDNABEKUDMUIXMMOUVIF";
	//Setup the cipher
	cipherString = cipher.encode(keyword, inputString);
	//If the cipher didn't spit out the correct string throw an error
	if(cipherString != outputString){
		errorString += testingError(ENCODE, inputString, outputString, cipherString);
		passed = false;
	}
	//This removes the spaces and turns everything capital so the reverse will work correctly
	inputString = cipher.getInputString();

	//Do the same thing in reverse
	cipher.reset();
	cipherString = cipher.decode(keyword, outputString);
	//If the cipher didn't spit out the correct string throw an error
	if(cipherString != inputString){
		errorString += testingError(DECODE, outputString, inputString, cipherString);
		passed = false;
	}

	//Return if the cipher passed the tests
	return passed;
}
#endif //PLAYFAIR_TEST


#else //TEST_VERSION main function


enum CipherFlagLocation { CAESAR, PLAYFAIR };
void getFlags(bool flags[]);

int main(int argc, char** argv){
	//Add the ability to input and output files with the appropriate strings
}

void getFlags(bool flags[]){

}
#endif //TEST_VERSION