/*

Copyright (c) 2012, 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/aux_/escape_string.hpp"
#include "libtorrent/hex.hpp"
#include "libtorrent/string_util.hpp"
#include "libtorrent/aux_/string_ptr.hpp"
#include <iostream>
#include <cstring> // for strcmp
#include "libtorrent/aux_/escape_string.hpp" // for trim

using namespace lt;

TORRENT_TEST(maybe_url_encode)
{
	// test maybe_url_encode
	TEST_EQUAL(maybe_url_encode("http://test:test@abc.com/abc<>abc"), "http://test:test@abc.com/abc%3c%3eabc");
	TEST_EQUAL(maybe_url_encode("http://abc.com/foo bar"), "http://abc.com/foo%20bar");
	TEST_EQUAL(maybe_url_encode("http://abc.com:80/foo bar"), "http://abc.com:80/foo%20bar");
	TEST_EQUAL(maybe_url_encode("http://abc.com:8080/foo bar"), "http://abc.com:8080/foo%20bar");
	TEST_EQUAL(maybe_url_encode("abc"), "abc");
	TEST_EQUAL(maybe_url_encode("http://abc.com/abc"), "http://abc.com/abc");
}

TORRENT_TEST(hex)
{
	static char const str[] = "0123456789012345678901234567890123456789";
	char bin[20];
	TEST_CHECK(aux::from_hex({str, 40}, bin));
	char hex[41];
	aux::to_hex(bin, hex);
	TEST_CHECK(strcmp(hex, str) == 0);

	TEST_CHECK(aux::to_hex({"\x55\x73",2}) == "5573");
	TEST_CHECK(aux::to_hex({"\xaB\xd0",2}) == "abd0");

	static char const hex_chars[] = "0123456789abcdefABCDEF";

	for (int i = 1; i < 255; ++i)
	{
		bool const hex = strchr(hex_chars, i) != nullptr;
		char const c = i;
		TEST_EQUAL(aux::is_hex(c), hex);
	}

	TEST_EQUAL(aux::hex_to_int('0'), 0);
	TEST_EQUAL(aux::hex_to_int('7'), 7);
	TEST_EQUAL(aux::hex_to_int('a'), 10);
	TEST_EQUAL(aux::hex_to_int('f'), 15);
	TEST_EQUAL(aux::hex_to_int('b'), 11);
	TEST_EQUAL(aux::hex_to_int('t'), -1);
	TEST_EQUAL(aux::hex_to_int('g'), -1);
}

TORRENT_TEST(is_space)
{
	TEST_CHECK(!is_space('C'));
	TEST_CHECK(!is_space('\b'));
	TEST_CHECK(!is_space('8'));
	TEST_CHECK(!is_space('='));
	TEST_CHECK(is_space(' '));
	TEST_CHECK(is_space('\t'));
	TEST_CHECK(is_space('\n'));
	TEST_CHECK(is_space('\r'));
	TEST_CHECK(is_space('\f'));
	TEST_CHECK(is_space('\v'));
}

TORRENT_TEST(to_lower)
{
	TEST_CHECK(to_lower('C') == 'c');
	TEST_CHECK(to_lower('c') == 'c');
	TEST_CHECK(to_lower('-') == '-');
	TEST_CHECK(to_lower('&') == '&');
}

TORRENT_TEST(string_equal_no_case)
{
	TEST_CHECK(string_equal_no_case("foobar", "FoobAR"));
	TEST_CHECK(string_equal_no_case("foobar", "foobar"));
	TEST_CHECK(!string_equal_no_case("foobar", "foobar "));
	TEST_CHECK(!string_equal_no_case("foobar", "F00"));
	TEST_CHECK(!string_equal_no_case("foobar", "foo"));
	TEST_CHECK(!string_equal_no_case("foo", "foobar"));

	TEST_CHECK(string_begins_no_case("foobar", "FoobAR --"));
	TEST_CHECK(string_begins_no_case("foo", "foobar"));
	TEST_CHECK(!string_begins_no_case("foobar", "F00"));
	TEST_CHECK(!string_begins_no_case("foobar", "foo"));

	TEST_CHECK(string_ends_with("foobar", "bar"));
	TEST_CHECK(string_ends_with("name.txt", ".txt"));
	TEST_CHECK(string_ends_with("name.a.b", ".a.b"));
	TEST_CHECK(!string_ends_with("-- FoobAR", "foobar"));
	TEST_CHECK(!string_ends_with("foobar", "F00"));
	TEST_CHECK(!string_ends_with("foobar", "foo"));
	TEST_CHECK(!string_ends_with("foo", "foobar"));
}

TORRENT_TEST(to_string)
{
	TEST_CHECK(to_string(345).data() == std::string("345"));
	TEST_CHECK(to_string(-345).data() == std::string("-345"));
	TEST_CHECK(to_string(0).data() == std::string("0"));
	TEST_CHECK(to_string(1000000000).data() == std::string("1000000000"));
}

TORRENT_TEST(base64)
{
	// base64 test vectors from http://www.faqs.org/rfcs/rfc4648.html
	TEST_CHECK(base64encode("") == "");
	TEST_CHECK(base64encode("f") == "Zg==");
	TEST_CHECK(base64encode("fo") == "Zm8=");
	TEST_CHECK(base64encode("foo") == "Zm9v");
	TEST_CHECK(base64encode("foob") == "Zm9vYg==");
	TEST_CHECK(base64encode("fooba") == "Zm9vYmE=");
	TEST_CHECK(base64encode("foobar") == "Zm9vYmFy");
}

#if TORRENT_USE_I2P
TORRENT_TEST(base32)
{
	// base32 test vectors from http://www.faqs.org/rfcs/rfc4648.html

	TEST_CHECK(base32encode("") == "");
	TEST_CHECK(base32encode("f") == "MY======");
	TEST_CHECK(base32encode("fo") == "MZXQ====");
	TEST_CHECK(base32encode("foo") == "MZXW6===");
	TEST_CHECK(base32encode("foob") == "MZXW6YQ=");
	TEST_CHECK(base32encode("fooba") == "MZXW6YTB");
	TEST_CHECK(base32encode("foobar") == "MZXW6YTBOI======");

	// base32 for i2p
	TEST_CHECK(base32encode("fo", string::no_padding) == "MZXQ");
	TEST_CHECK(base32encode("foob", string::i2p) == "mzxw6yq");
	TEST_CHECK(base32encode("foobar", string::lowercase) == "mzxw6ytboi======");
#endif // TORRENT_USE_I2P

	TEST_CHECK(base32decode("") == "");
	TEST_CHECK(base32decode("MY======") == "f");
	TEST_CHECK(base32decode("MZXQ====") == "fo");
	TEST_CHECK(base32decode("MZXW6===") == "foo");
	TEST_CHECK(base32decode("MZXW6YQ=") == "foob");
	TEST_CHECK(base32decode("MZXW6YTB") == "fooba");
	TEST_CHECK(base32decode("MZXW6YTBOI======") == "foobar");

	TEST_CHECK(base32decode("MY") == "f");
	TEST_CHECK(base32decode("MZXW6YQ") == "foob");
	TEST_CHECK(base32decode("MZXW6YTBOI") == "foobar");
	TEST_CHECK(base32decode("mZXw6yTBO1======") == "foobar");

	// make sure invalid encoding returns the empty string
	TEST_CHECK(base32decode("mZXw6yTBO1{#&*()=") == "");

	std::string test;
	for (int i = 0; i < 255; ++i)
		test += char(i);

	TEST_CHECK(base32decode(base32encode(test)) == test);
}

TORRENT_TEST(escape_string)
{
	// escape_string
	char const* test_string = "!@#$%^&*()-_=+/,. %?";
	TEST_EQUAL(escape_string(test_string)
		, "!%40%23%24%25%5e%26*()-_%3d%2b%2f%2c.%20%25%3f");

	// escape_path
	TEST_EQUAL(escape_path(test_string)
		, "!%40%23%24%25%5e%26*()-_%3d%2b/%2c.%20%25%3f");

	error_code ec;
	TEST_CHECK(unescape_string(escape_path(test_string), ec) == test_string);
	TEST_CHECK(!ec);
	if (ec) std::printf("%s\n", ec.message().c_str());

	// need_encoding
	char const* test_string2 = "!@$&()-_/,.%?";
	TEST_CHECK(need_encoding(test_string, int(strlen(test_string))) == true);
	TEST_CHECK(need_encoding(test_string2, int(strlen(test_string2))) == false);
	TEST_CHECK(need_encoding("\n", 1) == true);

	// maybe_url_encode
	TEST_EQUAL(maybe_url_encode("http://bla.com/\n"), "http://bla.com/%0a");
	TEST_EQUAL(maybe_url_encode("http://bla.com/foo%20bar"), "http://bla.com/foo%20bar");
	TEST_EQUAL(maybe_url_encode("http://bla.com/foo%20bar?k=v&k2=v2")
		, "http://bla.com/foo%20bar?k=v&k2=v2");
	TEST_EQUAL(maybe_url_encode("?&"), "?&");

	// unescape_string
	TEST_CHECK(unescape_string(escape_string(test_string), ec)
		== test_string);
	std::cout << unescape_string(escape_string(test_string), ec) << std::endl;
	// prematurely terminated string
	unescape_string("%", ec);
	TEST_CHECK(ec == error_code(errors::invalid_escaped_string));
	unescape_string("%0", ec);
	TEST_CHECK(ec == error_code(errors::invalid_escaped_string));

	// invalid hex character
	unescape_string("%GE", ec);
	TEST_CHECK(ec == error_code(errors::invalid_escaped_string));
	unescape_string("%eg", ec);
	TEST_CHECK(ec == error_code(errors::invalid_escaped_string));
	ec.clear();

	TEST_CHECK(unescape_string("123+abc", ec) == "123 abc");
}

TORRENT_TEST(read_until)
{
	char const* test_string1 = "abcdesdf sdgf";
	char const* tmp1 = test_string1;
	TEST_CHECK(read_until(tmp1, 'd', test_string1 + strlen(test_string1)) == "abc");

	tmp1 = test_string1;
	TEST_CHECK(read_until(tmp1, '[', test_string1 + strlen(test_string1))
		== "abcdesdf sdgf");
}

TORRENT_TEST(url_has_argument)
{
	TEST_CHECK(url_has_argument("http://127.0.0.1/test", "test") == "");
	TEST_CHECK(url_has_argument("http://127.0.0.1/test?foo=24", "bar") == "");
	TEST_CHECK(url_has_argument("http://127.0.0.1/test?foo=24", "foo") == "24");
	TEST_CHECK(url_has_argument("http://127.0.0.1/test?foo=24&bar=23", "foo") == "24");
	TEST_CHECK(url_has_argument("http://127.0.0.1/test?foo=24&bar=23", "bar") == "23");
	TEST_CHECK(url_has_argument("http://127.0.0.1/test?foo=24&bar=23&a=e", "bar") == "23");
	TEST_CHECK(url_has_argument("http://127.0.0.1/test?foo=24&bar=23&a=e", "a") == "e");
	TEST_CHECK(url_has_argument("http://127.0.0.1/test?foo=24&bar=23&a=e", "b") == "");
}

TORRENT_TEST(path)
{
	std::string path = "a\\b\\c";
	convert_path_to_posix(path);
	TEST_EQUAL(path, "a/b/c");

#ifndef TORRENT_NO_DEPRECATE
	// resolve_file_url

#ifdef TORRENT_WINDOWS
	std::string p = "c:/blah/foo/bar\\";
	convert_path_to_windows(p);
	TEST_EQUAL(p, "c:\\blah\\foo\\bar\\");
	TEST_EQUAL(resolve_file_url("file:///c:/blah/foo/bar"), "c:\\blah\\foo\\bar");
	TEST_EQUAL(resolve_file_url("file:///c:/b%3fah/foo/bar"), "c:\\b?ah\\foo\\bar");
	TEST_EQUAL(resolve_file_url("file://\\c:\\b%3fah\\foo\\bar"), "c:\\b?ah\\foo\\bar");
#else
	TEST_EQUAL(resolve_file_url("file:///c/blah/foo/bar"), "/c/blah/foo/bar");
	TEST_EQUAL(resolve_file_url("file:///c/b%3fah/foo/bar"), "/c/b?ah/foo/bar");
#endif
#endif
}

void test_parse_interface(char const* input
	, std::vector<listen_interface_t> expected
	, std::string output)
{
	std::printf("parse interface: %s\n", input);
	auto const list = parse_listen_interfaces(input);
	TEST_EQUAL(list.size(), expected.size());
	if (list.size() == expected.size())
	{
		TEST_CHECK(std::equal(list.begin(), list.end(), expected.begin()
			, [&](listen_interface_t const& lhs, listen_interface_t const& rhs)
			{ return lhs.device == rhs.device && lhs.port == rhs.port && lhs.ssl == rhs.ssl; }));
	}
	TEST_EQUAL(print_listen_interfaces(list), output);
}

TORRENT_TEST(parse_list)
{
	std::vector<std::string> list;
	parse_comma_separated_string("  a,b, c, d ,e \t,foobar\n\r,[::1]", list);
	TEST_EQUAL(list.size(), 7);
	TEST_EQUAL(list[0], "a");
	TEST_EQUAL(list[1], "b");
	TEST_EQUAL(list[2], "c");
	TEST_EQUAL(list[3], "d");
	TEST_EQUAL(list[4], "e");
	TEST_EQUAL(list[5], "foobar");
	TEST_EQUAL(list[6], "[::1]");

#if TORRENT_USE_IPV6
	test_parse_interface("  a:4,b:35, c : 1000s, d: 351 ,e \t:42,foobar:1337s\n\r,[2001::1]:6881"
		, {{"a", 4, false}, {"b", 35, false}, {"c", 1000, true}, {"d", 351, false}
			, {"e", 42, false}, {"foobar", 1337, true}, {"2001::1", 6881, false}}
		, "a:4,b:35,c:1000s,d:351,e:42,foobar:1337s,[2001::1]:6881");
#else
	test_parse_interface("  a:4,b:35, c : 1000s, d: 351 ,e \t:42,foobar:1337s\n\r,[2001::1]:6881"
		, {{"a", 4, false}, {"b", 35, false}, {"c", 1000, true}, {"d", 351, false}
			, {"e", 42, false}, {"foobar", 1337, true}}
		, "a:4,b:35,c:1000s,d:351,e:42,foobar:1337s");
#endif

	// IPv6 address
#if TORRENT_USE_IPV6
	test_parse_interface("[2001:ffff::1]:6882s"
		, {{"2001:ffff::1", 6882, true}}
		, "[2001:ffff::1]:6882s");
#else
	test_parse_interface("[2001:ffff::1]:6882s", {}, "");
#endif

	// IPv4 address
	test_parse_interface("127.0.0.1:6882"
		, {{"127.0.0.1", 6882, false}}
		, "127.0.0.1:6882");

	// maximum padding
	test_parse_interface("  nic\r\n:\t 12\r s "
		, {{"nic", 12, true}}
		, "nic:12s");

	// negative tests
	test_parse_interface("nic:99999999999999999999999", {}, "");
	test_parse_interface("nic:  -3", {}, "");
	test_parse_interface("nic:  ", {}, "");
	test_parse_interface("nic :", {}, "");
	test_parse_interface("nic ", {}, "");
	test_parse_interface("nic s", {}, "");

	// parse interface with port 0
	test_parse_interface("127.0.0.1:0"
		, {{"127.0.0.1", 0, false}}, "127.0.0.1:0");
}

TORRENT_TEST(split_string)
{
	TEST_CHECK(split_string("a b"_sv, ' ') == std::make_pair("a"_sv, "b"_sv));
	TEST_CHECK(split_string("\"a b\" c"_sv, ' ') == std::make_pair("\"a b\""_sv, "c"_sv));
	TEST_CHECK(split_string("\"a b\"foobar c"_sv, ' ') == std::make_pair("\"a b\"foobar"_sv, "c"_sv));
	TEST_CHECK(split_string("a\nb foobar"_sv, ' ') == std::make_pair("a\nb"_sv, "foobar"_sv));
	TEST_CHECK(split_string("a b\"foo\"bar"_sv, '"') == std::make_pair("a b"_sv, "foo\"bar"_sv));
	TEST_CHECK(split_string("a"_sv, ' ') == std::make_pair("a"_sv, ""_sv));
	TEST_CHECK(split_string("\"a b"_sv, ' ') == std::make_pair("\"a b"_sv, ""_sv));
	TEST_CHECK(split_string(""_sv, ' ') == std::make_pair(""_sv, ""_sv));
}

TORRENT_TEST(convert_from_native)
{
	TEST_EQUAL(std::string("foobar"), convert_from_native(convert_to_native("foobar")));
	TEST_EQUAL(std::string("foobar")
		, convert_from_native(convert_to_native("foo"))
		+ convert_from_native(convert_to_native("bar")));

	TEST_EQUAL(convert_to_native("foobar")
		, convert_to_native("foo") + convert_to_native("bar"));
}

TORRENT_TEST(trim)
{
	TEST_EQUAL(trim(""), "");
	TEST_EQUAL(trim("\t "), "");
	TEST_EQUAL(trim(" a"), "a");
	TEST_EQUAL(trim(" a "), "a");
	TEST_EQUAL(trim("\t \na \t\r"), "a");
	TEST_EQUAL(trim(" \t \ta"), "a");
	TEST_EQUAL(trim("a "), "a");
	TEST_EQUAL(trim("a \t"), "a");
	TEST_EQUAL(trim("a \t\n \tb"), "a \t\n \tb");
}

#if TORRENT_USE_I2P
TORRENT_TEST(i2p_url)
{
	TEST_CHECK(is_i2p_url("http://a.i2p/a"));
	TEST_CHECK(!is_i2p_url("http://a.I2P/a"));
	TEST_CHECK(!is_i2p_url("http://c.i3p"));
	TEST_CHECK(!is_i2p_url("http://i2p/foo bar"));
}
#endif

TORRENT_TEST(string_hash_no_case)
{
	string_hash_no_case hsh;

	// make sure different strings yield different hashes
	TEST_CHECK(hsh("ab") != hsh("ba"));

	// make sure case is ignored
	TEST_EQUAL(hsh("Ab"), hsh("ab"));
	TEST_EQUAL(hsh("Ab"), hsh("aB"));

	// make sure zeroes in strings are supported
	TEST_CHECK(hsh(std::string("\0a", 2)) != hsh(std::string("\0b", 2)));
	TEST_EQUAL(hsh(std::string("\0a", 2)), hsh(std::string("\0a", 2)));
}

TORRENT_TEST(string_eq_no_case)
{
	string_eq_no_case cmp;
	TEST_CHECK(cmp("ab", "ba") == false);
	TEST_CHECK(cmp("", ""));
	TEST_CHECK(cmp("abc", "abc"));

	// make sure different lengths are correctly treated as different
	TEST_CHECK(cmp("abc", "ab") == false);

	// make sure case is ignored
	TEST_CHECK(cmp("Ab", "ab"));
	TEST_CHECK(cmp("Ab", "aB"));

	// make sure zeros are supported
	TEST_CHECK(cmp(std::string("\0a", 2), std::string("\0b", 2)) == false);
	TEST_CHECK(cmp(std::string("\0a", 2), std::string("\0a", 2)));
}

TORRENT_TEST(string_ptr_zero_termination)
{
	char str[] = {'f', 'o', 'o', 'b', 'a', 'r'};
	aux::string_ptr p(string_view(str, sizeof(str)));

	// make sure it's zero-terminated now
	TEST_CHECK(strlen(*p) == 6);
	TEST_CHECK((*p)[6] == '\0');
	TEST_CHECK(*p == string_view("foobar"));
}

TORRENT_TEST(string_ptr_move_construct)
{
	aux::string_ptr p1("test");
	TEST_CHECK(*p1 == string_view("test"));

	aux::string_ptr p2(std::move(p1));

	TEST_CHECK(*p2 == string_view("test"));

	// moved-from state is empty
	TEST_CHECK(*p1 == nullptr);
}

TORRENT_TEST(string_ptr_move_assign)
{
	aux::string_ptr p1("test");
	TEST_CHECK(*p1 == string_view("test"));

	aux::string_ptr p2("foobar");

	p1 = std::move(p2);

	TEST_CHECK(*p1 == string_view("foobar"));

	// moved-from state is empty
	TEST_CHECK(*p2 == nullptr);
}