/*

Copyright (c) 2008, Arvid Norberg
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in
      the documentation and/or other materials provided with the distribution.
    * Neither the name of the author nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

*/

#include "test.hpp"
#include "libtorrent/socket.hpp"
#include "libtorrent/socket_io.hpp" // print_endpoint
#include "libtorrent/http_connection.hpp"
#include "libtorrent/resolver.hpp"
#include "setup_transfer.hpp"

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

using namespace libtorrent;

io_service ios;
resolver res(ios);

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

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

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

void http_connect_handler(http_connection& c)
{
	++connect_handler_called;
	TEST_CHECK(c.socket().is_open());
	error_code ec;
	std::cerr << aux::time_now_string() << " connected to: " << print_endpoint(c.socket().remote_endpoint(ec))
		<< std::endl;
// this is not necessarily true when using a proxy and proxying hostnames
//	TEST_CHECK(c.socket().remote_endpoint(ec).address() == address::from_string("127.0.0.1", ec));
}

void http_handler(error_code const& ec, http_parser const& parser
	, char const* data, int size, http_connection& c)
{
	++handler_called;
	data_size = size;
	g_error_code = ec;
	TORRENT_ASSERT(size == 0 || parser.finished());

	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);
}

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

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

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

	std::cerr << aux::time_now_string()
		<< " expecting: size: " << size
		<< " status: " << status
		<< " connected: " << connected
		<< " error: " << (ec?ec->message():"no error") << std::endl;

	boost::shared_ptr<http_connection> h(new http_connection(ios
		, res, &::http_handler, true, 1024*1024, &::http_connect_handler));
	h->get(url, seconds(1), 0, &ps, 5, "test/user-agent", address_v4::any()
		, 0, auth);
	ios.reset();
	error_code e;
	ios.run(e);
	if (e) std::cerr << aux::time_now_string() << " run failed: " << e.message() << std::endl;

	std::cerr << aux::time_now_string() << " connect_handler_called: " << connect_handler_called << std::endl;
	std::cerr << aux::time_now_string() << " handler_called: " << handler_called << std::endl;
	std::cerr << aux::time_now_string() << " status: " << http_status << std::endl;
	std::cerr << aux::time_now_string() << " size: " << data_size << std::endl;
	std::cerr << aux::time_now_string() << " expected-size: " << size << std::endl;
	std::cerr << aux::time_now_string() << " error_code: " << g_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 || g_error_code == *ec);
	TEST_CHECK(http_status == status || status == -1);
}

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

	printf("\n\n********************** using %s proxy **********************\n"
		, test_name[ps.type]);

	typedef boost::optional<error_code> err;
	// this requires the hosts file to be modified
//	run_test(protocol + "://test.dns.ts:8001/test_file", 3216, 200, 1, error_code(), ps);

	char url[256];
	snprintf(url, sizeof(url), "%s://127.0.0.1:%d/", protocol.c_str(), port);
	std::string url_base(url);

	run_test(url_base + "relative/redirect", 3216, 200, 2, error_code(), ps);
	run_test(url_base + "redirect", 3216, 200, 2, error_code(), ps);
	// the actual error code for an abort caused by too many
	// redirects is a bit unpredictable. under SSL for instance,
	// it will be an ungraceful shutdown
	run_test(url_base + "infinite_redirect", 0, 301, 6, err(), ps);
	run_test(url_base + "test_file", 3216, 200, 1, error_code(), ps);
	run_test(url_base + "test_file.gz", 3216, 200, 1, error_code(), ps);
	run_test(url_base + "non-existing-file", -1, 404, 1, err(), ps);
	run_test(url_base + "password_protected", 3216, 200, 1, error_code(), ps
		, "testuser:testpass");

	// only run the tests to handle NX_DOMAIN if we have a proper internet
	// connection that doesn't inject false DNS responses (like Comcast does)
	hostent* h = gethostbyname("non-existent-domain.se");
	printf("gethostbyname(\"non-existent-domain.se\") = %p. h_errno = %d\n", h, h_errno);
	if (h == 0 && h_errno == HOST_NOT_FOUND)
	{
		// if we're going through an http proxy, we won't get the same error as if the hostname
		// resolution failed
		if ((ps.type == settings_pack::http || ps.type == settings_pack::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(), ps);
	}
	if (ps.type != settings_pack::none)
		stop_proxy(ps.port);
}

int test_main()
{
	std::srand(std::time(0));
	std::generate(data_buffer, data_buffer + sizeof(data_buffer), &std::rand);
	error_code ec;
	file test_file("test_file", file::write_only, ec);
	TEST_CHECK(!ec);
	if (ec) fprintf(stderr, "file error: %s\n", ec.message().c_str());
	file::iovec_t b = { data_buffer, 3216};
	test_file.writev(0, &b, 1, ec);
	TEST_CHECK(!ec);
	if (ec) fprintf(stderr, "file error: %s\n", ec.message().c_str());
	test_file.close();
	
	proxy_settings ps;
	ps.hostname = "127.0.0.1";
	ps.port = 8034;
	ps.username = "testuser";
	ps.password = "testpass";
	int port = 0;
	
	port = start_web_server();

	for (int i = 0; i < 5; ++i)
	{
		ps.type = (settings_pack::proxy_type_t)i;
		run_suite("http", ps, port);
	}
	stop_web_server();

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

	// test chunked encoding
	fprintf(stderr, "\ntest chunked encoding\n\n");
	port = start_web_server(false, true);
	ps.type = settings_pack::none;
	run_suite("http", ps, port);

	// test no keep-alive
	fprintf(stderr, "\ntest no keep-alive\n\n");
	port = start_web_server(false, false, false);
	ps.type = settings_pack::none;
	run_suite("http", ps, port);

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