#include "test.hpp"
#include "libtorrent/socket.hpp"
#include "libtorrent/connection_queue.hpp"
#include "libtorrent/http_connection.hpp"
#include "setup_transfer.hpp"

#include <fstream>
#include <boost/optional.hpp>

using namespace libtorrent;

io_service ios;
connection_queue cq(ios);

int connect_handler_called = 0;
int handler_called = 0;
int data_size = 0;
int http_status = 0;
asio::error_code error_code;
char data_buffer[4000];

void print_http_header(http_parser const& p)
{
	std::cerr << " < " << p.status_code() << " " << p.message() << std::endl;

	for (std::map<std::string, std::string>::const_iterator i
		= p.headers().begin(), end(p.headers().end()); i != end; ++i)
	{
		std::cerr << " < " << i->first << ": " << i->second << std::endl;
	}
}

void http_connect_handler(http_connection& c)
{
	++connect_handler_called;
	TEST_CHECK(c.socket().is_open());
	std::cerr << "connected to: " << c.socket().remote_endpoint() << std::endl;
	TEST_CHECK(c.socket().remote_endpoint().address() == address::from_string("127.0.0.1"));
}

void http_handler(asio::error_code const& ec, http_parser const& parser, char const* data, int size)
{
	++handler_called;
	data_size = size;
	error_code = ec;

	if (parser.header_finished())
	{
		http_status = parser.status_code();
		if (http_status == 200)
		{
			TEST_CHECK(memcmp(data, data_buffer, size) == 0);
		}
	}
	print_http_header(parser);

	cq.close();
}

void reset_globals()
{
	connect_handler_called = 0;
	handler_called = 0;
	data_size = 0;
	http_status = 0;
	error_code = asio::error_code();
}

void run_test(std::string const& url, int size, int status, int connected
	, boost::optional<asio::error_code> ec, proxy_settings const& ps)
{
	reset_globals();

	std::cerr << " ===== TESTING: " << url << " =====" << std::endl;

	boost::shared_ptr<http_connection> h(new http_connection(ios, cq
		, &::http_handler, true, &::http_connect_handler));
	h->get(url, seconds(30), 0, &ps);
	ios.reset();
	ios.run();

	std::cerr << "connect_handler_called: " << connect_handler_called << std::endl;
	std::cerr << "handler_called: " << handler_called << std::endl;
	std::cerr << "status: " << http_status << std::endl;
	std::cerr << "size: " << data_size << std::endl;
	std::cerr << "error_code: " << error_code.message() << std::endl;
	TEST_CHECK(connect_handler_called == connected);
	TEST_CHECK(handler_called == 1);	
	TEST_CHECK(data_size == size || size == -1);
	TEST_CHECK(!ec || error_code == *ec);
	TEST_CHECK(http_status == status || status == -1);
}

void run_suite(std::string const& protocol, proxy_settings const& ps)
{
	if (ps.type != proxy_settings::none)
	{
		start_proxy(ps.port, ps.type);
	}
	char const* test_name[] = {"no", "SOCKS4", "SOCKS5"
		, "SOCKS5 password protected", "HTTP", "HTTP password protected"};
	std::cout << "\n\n********************** using " << test_name[ps.type]
		<< " proxy **********************\n" << std::endl;

	typedef boost::optional<asio::error_code> err;
	run_test(protocol + "://127.0.0.1:8001/redirect", 3216, 200, 2, asio::error_code(), ps);
	run_test(protocol + "://127.0.0.1:8001/infinite_redirect", 0, 301, 6, asio::error_code(), ps);
	run_test(protocol + "://127.0.0.1:8001/test_file", 3216, 200, 1, asio::error_code(), ps);
	run_test(protocol + "://127.0.0.1:8001/test_file.gz", 3216, 200, 1, asio::error_code(), ps);
	run_test(protocol + "://127.0.0.1:8001/non-existing-file", -1, 404, 1, err(), ps);
	// if we're going through an http proxy, we won't get the same error as if the hostname
	// resolution failed
	if ((ps.type == proxy_settings::http || ps.type == proxy_settings::http_pw) && protocol != "https")
		run_test(protocol + "://non-existent-domain.se/non-existing-file", -1, 502, 1, err(), ps);
	else
		run_test(protocol + "://non-existent-domain.se/non-existing-file", -1, -1, 0, err(asio::error::host_not_found), ps);

	if (ps.type != proxy_settings::none)
		stop_proxy(ps.port);
}

int test_main()
{
	std::srand(std::time(0));
	std::generate(data_buffer, data_buffer + sizeof(data_buffer), &std::rand);
	std::ofstream("test_file").write(data_buffer, 3216);
	std::system("gzip -9 -c test_file > test_file.gz");
	
	proxy_settings ps;
	ps.hostname = "127.0.0.1";
	ps.port = 8034;
	ps.username = "testuser";
	ps.password = "testpass";
	
	start_web_server(8001);
	for (int i = 0; i < 5; ++i)
	{
		ps.type = (proxy_settings::proxy_type)i;
		run_suite("http", ps);
	}
	stop_web_server(8001);

#ifdef TORRENT_USE_OPENSSL
	start_web_server(8001, true);
	for (int i = 0; i < 5; ++i)
	{
		ps.type = (proxy_settings::proxy_type)i;
		run_suite("https", ps);
	}
	stop_web_server(8001);
#endif

	std::remove("test_file");
	return 0;
}