#include "async_resp.hpp" // IWYU pragma: keep
#include "http_request.hpp"
#include "routing.hpp"
#include "utility.hpp"

#include <boost/beast/http/message.hpp> // IWYU pragma: keep
#include <boost/beast/http/verb.hpp>

#include <memory>
#include <string>
#include <string_view>
#include <system_error>

#include <gtest/gtest.h> // IWYU pragma: keep

// IWYU pragma: no_include <boost/beast/http/impl/message.hpp>
// IWYU pragma: no_include "gtest/gtest_pred_impl.h"
// IWYU pragma: no_include <boost/intrusive/detail/list_iterator.hpp>
// IWYU pragma: no_include <gtest/gtest-message.h>
// IWYU pragma: no_include <gtest/gtest-test-part.h>
// IWYU pragma: no_forward_declare bmcweb::AsyncResp

namespace crow
{
namespace
{

using ::crow::black_magic::getParameterTag;

TEST(Router, AllowHeader)
{
    // Callback handler that does nothing
    auto nullCallback = [](const Request&,
                           const std::shared_ptr<bmcweb::AsyncResp>&) {};

    Router router(/*allowSessionEmpty=*/true);
    std::error_code ec;

    constexpr std::string_view url = "/foo";

    Request req{{boost::beast::http::verb::get, url, 11}, ec};

    // No route should return no methods.
    router.validate();
    EXPECT_EQ(router.findRoute(req).allowHeader, "");
    EXPECT_EQ(router.findRoute(req).route.rule, nullptr);

    router.newRuleTagged<getParameterTag(url)>(std::string(url))
        .methods(boost::beast::http::verb::get)(nullCallback);
    router.validate();
    EXPECT_EQ(router.findRoute(req).allowHeader, "GET");
    EXPECT_NE(router.findRoute(req).route.rule, nullptr);

    Request patchReq{{boost::beast::http::verb::patch, url, 11}, ec};
    EXPECT_EQ(router.findRoute(patchReq).route.rule, nullptr);

    router.newRuleTagged<getParameterTag(url)>(std::string(url))
        .methods(boost::beast::http::verb::patch)(nullCallback);
    router.validate();
    EXPECT_EQ(router.findRoute(req).allowHeader, "GET, PATCH");
    EXPECT_NE(router.findRoute(req).route.rule, nullptr);
    EXPECT_NE(router.findRoute(patchReq).route.rule, nullptr);
}

TEST(Router, 404)
{
    bool callbackCalled = false;
    // Callback handler that does nothing
    auto callback =
        [&](const Request& req, const std::shared_ptr<bmcweb::AsyncResp>&) {
        BMCWEB_LOG_DEBUG << "=> req: " << req.target();
        callbackCalled = true;
    };

    Router router(/*allowSessionEmpty=*/true);
    std::error_code ec;

    constexpr std::string_view url = "/foo/bar";

    Request req{{boost::beast::http::verb::get, url, 11}, ec};
    req.session = std::make_shared<persistent_data::UserSession>();
    req.session->username = "batman";

    router.newRuleTagged<getParameterTag(url)>("/foo/<path>")
        .methods(boost::beast::http::verb::get)
        .notFound()(callback);
    router.validate();

    {
        std::shared_ptr<bmcweb::AsyncResp> asyncResp =
            std::make_shared<bmcweb::AsyncResp>();
        router.handle(req, asyncResp);
        BMCWEB_LOG_DEBUG << "=> res: "
                         << " resultInt: " << asyncResp->res.resultInt()
                         << " reason: " << asyncResp->res.reason();
    }

    EXPECT_TRUE(callbackCalled);
}

TEST(Router, 405)
{
    // Callback handler that does nothing
    auto nullCallback = [](const Request&,
                           const std::shared_ptr<bmcweb::AsyncResp>&) {};
    bool called = false;
    auto notAllowedCallback =
        [&called](const Request&, const std::shared_ptr<bmcweb::AsyncResp>&) {
        called = true;
    };

    Router router(/*allowSessionEmpty=*/true);
    std::error_code ec;

    constexpr std::string_view url = "/foo/bar";

    Request req{{boost::beast::http::verb::patch, url, 11}, ec};
    req.session = std::make_shared<persistent_data::UserSession>();
    req.session->username = "batman";

    router.newRuleTagged<getParameterTag(url)>(std::string(url))
        .methods(boost::beast::http::verb::get)(nullCallback);
    router.newRuleTagged<getParameterTag(url)>("/foo/<path>")
        .methodNotAllowed()(notAllowedCallback);
    router.validate();
    {
        std::shared_ptr<bmcweb::AsyncResp> asyncResp =
            std::make_shared<bmcweb::AsyncResp>();

        router.handle(req, asyncResp);
        BMCWEB_LOG_DEBUG << "=> res: "
                         << " resultInt: " << asyncResp->res.resultInt()
                         << " reason: " << asyncResp->res.reason();
    }
    EXPECT_TRUE(called);
}

TEST(Trie, TrieTestReturnsRuleIndexSuccessfullyWithoutWildcards)
{
    Trie trie;

    trie.add("/redfish", 1);
    trie.add("/redfish/v1", 2);
    trie.add("/redfish/v1/Chassis", 3);

    EXPECT_EQ(trie.find("/redfish").first, 1);
    EXPECT_EQ(trie.find("/redfish/v1").first, 2);
    EXPECT_EQ(trie.find("/redfish/v1/Chassis").first, 3);
}

TEST(Trie, TrieTestReturnsRuleIndexSuccessfullyWithStringAndPathWildcard)
{
    Trie trie;

    trie.add("/redfish", 1);
    trie.add("/redfish/v1", 2);
    trie.add("/redfish/v1/Chassis", 3);
    trie.add("/redfish/v1/Chassis/<str>", 4);
    trie.add("/redfish/<path>", 5);

    EXPECT_EQ(trie.find("/redfish/v1/Chassis/test").first, 4);
    EXPECT_EQ(trie.find("/redfish/v1/random/path/here").first, 5);
}

#ifndef PLATFORM_PLUGINS_ENABLED
TEST(Trie, TrieTestReturnsLowestIndexWhenUrlMatchesMultipleRules)
{
    Trie trie;

    trie.add("/redfish", 1);
    trie.add("/redfish/<path>", 2);
    trie.add("/redfish/v1", 3);

    EXPECT_EQ(trie.find("/redfish/v1").first, 2);
}
#endif

#ifdef PLATFORM_PLUGINS_ENABLED
TEST(Trie, TrieReturnsFixedPathBeforeWildCard)
{
    Trie trie;

    trie.add("/redfish/<path>", 0);
    trie.add("/redfish", 1);
    trie.add("/redfish/v1", 2);
    trie.add("/redfish/v1/Chassis", 3);
    trie.add("/redfish/v1/Chassis/<str>", 4);
    trie.add("/redfish/v1/Chassis/test", 6);

    EXPECT_EQ(trie.find("/redfish/v1/Chassis/test").first, 6);
    EXPECT_EQ(trie.find("/redfish/v1/Chassis/test1").first, 4);
    EXPECT_EQ(trie.find("/redfish/v1/random/path/here").first, 0);
}

TEST(Trie, TrieReturnsFixedPathBeforeWildCardWhenAddedInReverseOrder)
{
    Trie trie;

    trie.add("/redfish/<path>", 0);
    trie.add("/redfish", 1);
    trie.add("/redfish/v1", 2);
    trie.add("/redfish/v1/Chassis", 3);
    trie.add("/redfish/v1/Chassis/test", 4);
    trie.add("/redfish/v1/Chassis/<str>", 5);

    EXPECT_EQ(trie.find("/redfish/v1/Chassis/test").first, 4);
    EXPECT_EQ(trie.find("/redfish/v1/Chassis/test1").first, 5);
    EXPECT_EQ(trie.find("/redfish/v1/random/path/here").first, 0);
}
#endif


} // namespace
} // namespace crow