#include <cstdlib>
#include <iostream>
#include<Windows.h>
#include<string>
#include <fstream>
#pragma warning(disable:4996)
#include <stdio.h>
#include <cctype>


#define MAX_LINE 512

using namespace std;

int countChars(char letter);

int sumofletters()
{
	int freq[128];     // frequencies of letters
	ifstream inFile;   // input file
	char ch;

	inFile.open("test.txt");
	if (!inFile)
	{
		cout << "The input file could not be opened." << endl;
		return 1;
	}

	// initialize frequency counts to zero for each possible letter
	for (int k = 0; k < 128; k++)
	{
		freq[k] = 0;
	}

	// Read the file, keeping track of frequency with which each letter occurs
	ch = inFile.get();
	while (ch != EOF)
	{
		ch = toupper(ch);
		freq[ch]++;
		ch = inFile.get();
	}
	// Print the output table

	int sum = 0;
	for (char ch = 'A'; ch <= 'Z'; ch++)
	{

		sum = freq[ch] + sum;
	}
	cout << "Suma liter: " << sum << endl;
	return 0;
}

int download()
{
	char url[MAX_LINE] = "ftp://tgftp.nws.noaa.gov/data/observations/metar/stations/KLAX.TXT";
	char destination[MAX_LINE] = "test.txt";
	char buffer[MAX_LINE];

	HRESULT    dl;

	typedef HRESULT(WINAPI* URLDownloadToFileA_t)(LPUNKNOWN pCaller, LPCSTR szURL, LPCSTR szFileName, DWORD dwReserved, void* lpfnCB);
	URLDownloadToFileA_t xURLDownloadToFileA;
	xURLDownloadToFileA = (URLDownloadToFileA_t)GetProcAddress(LoadLibraryA("urlmon"), "URLDownloadToFileA");

	dl = xURLDownloadToFileA(NULL, url, destination, 0, NULL);

	sprintf_s(buffer, "Downloading File From: %s, To: %s\n", url, destination);

	if (dl == S_OK)
	{
		sprintf_s(buffer, "File Successfully Downloaded To: %s\n", destination);
		printf(buffer);
	}
	else if (dl == E_OUTOFMEMORY)
	{
		sprintf_s(buffer, "Failed To Download File Reason: Insufficient Memory\n");
		printf(buffer);
		return 0;
	}
	else
	{
		sprintf_s(buffer, "Failed To Download File Reason: Unknown\n");
		printf(buffer);
		return 0;
	}
}

int countWords() {
	string line;
	int words = 0;
	string word;
	ifstream myfile("test.txt");
	while (myfile >> word) {
		++words;
	}
	cout << words << "\n";

	return 0;
}


	class RedirectStdOutput {
	public:
		RedirectStdOutput(std::ofstream& file)
			: _psbuf{ file.rdbuf() }, _backup{ std::cout.rdbuf() }
		{
			std::cout.rdbuf(_psbuf);
		}

		~RedirectStdOutput() {
			std::cout.rdbuf(_backup);
		}

	private:
		std::streambuf* _psbuf;
		std::streambuf* _backup;
	};


	int letterslist()
	{
		char letter;

		cout << "Letter\t\tHow many times" << endl;

		for (letter = 'a'; letter <= 'z'; letter++)
		{

			cout << letter << "\t\t" << countChars(letter) << " times" << endl;
		}
		for (letter = 'A'; letter <= 'Z'; letter++)
		{
			cout << letter << "\t\t" << countChars(letter) << " times" << endl;
		}




		return EXIT_SUCCESS;
	}

	int zdania() {
		const int n = 4;
		int countx = 0;
		char chars[n] = { '.', ',', '?', '!' };

		ifstream myfile("test.txt");
		char c;
		while (!myfile.eof()) {
			myfile >> c;
			for (int i = 0; i < n; i++) {
				if (c == chars[i]) {
					countx++;
				}
			}
		}
		myfile.close();
		cout << "Ilosc znakow interpunkcyjnych" << countx - 1 << endl;
		return 0;
	}


	int znaki() {
		const int n = 4;
		int count = 0;
		char chars[n] = { '.', ',', '?', '!' };
		ifstream myfile("test.txt");
		char c;
		while (!myfile.eof()) {
			myfile >> c;
			for (int i = 0; i < n; i++) {
				if (c == chars[i]) {
					count++;
				}
			}
		}
		myfile.close();
		cout << "Ilosc zdan:" << count - 1 << endl;
		return 0;
	}

	int countChars(char letter)
	{
		{
			ifstream stream;
			char character;
			int count = 0;

			stream.open("test.txt");
			stream.get(character);

			while (!stream.fail())
			{
				if (character == letter)
					count++;
				stream.get(character);
			}
			stream.close();

			return count;
		}
	}

	int stats1()
	{

		freopen("statystyki.txt", "w", stdout);
		sumofletters();
		zdania();
		znaki();


		return 0;


	}

int main(int argc, char* argv[])
{
	int choice;

	do {
		cout << "Menu\n";
		cout << "Dokonaj wyboru\n";
		cout << "1 - Pobierz plik z internetu\n";
		cout << "2 - Zlicz liczbe liter w pliku\n";
		cout << "3 - Zlicz liczbe wyrazow w pliku\n";
		cout << "4 - Zlicz liczbe znakow interpunkcyjnych w pliku\n";
		cout << "5 - Zlicz liczbe zdan pliku\n";
		cout << "6 - Wygeneruj raport o uzyciu liter (A-Z)\n";
		cout << "7 - Zapisz statystyki z punktow 2-5 do pliku statystyki.txt\n";
		cout << "8 - Wyjscie z programu\n";
		cout << "Wybor: ";
		cin >> choice;

		switch (choice) {
		case 1:

			download();
			break;
		case 2:
			sumofletters();
			break;
		case 3:
			countWords();
			break;
		case 4:
			znaki();
			break;

		case 5:
			zdania();
			break;
		case 6:
			letterslist();
			break;
		case 7:
			stats1();
			break;
		case 8:
			cout << "Goodbye!";
			return 0;
		default:
			cout << "Menu\n";
			cout << "Dokonaj wyboru\n";
			cout << "1 - Pobierz plik z internetu\n";
			cout << "2 - Zlicz liczbe liter w pliku\n";
			cout << "3 - Zlicz liczbe wyrazow w pliku\n";
			cout << "4 - Zlicz liczbe znakow interpunkcyjnych w pliku\n";
			cout << "5 - Zlicz liczbe zdan pliku\n";
			cout << "6 - Wygeneruj raport o uzyciu liter (A-Z)\n";
			cout << "7 - Zapisz statystyki z punktow 2-5 do pliku statystyki.txt\n";
			cout << "8 - Wyjscie z programu\n";
			cout << "Wybór: ";
			cin >> choice;
		}
	} while (choice != 8);

	return EXIT_SUCCESS;
}