#include "routing.hpp"

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

#include <gtest/gtest.h>  // IWYU pragma: keep
#include "boost/beast/http/message.hpp"  // IWYU pragma: keep  // NOLINT
#include "boost/beast/http/verb.hpp"  // NOLINT
#include "http_request.hpp"
#include "logging.hpp"
#include "utility.hpp"
#include "async_resp.hpp"  // IWYU pragma: keep
#include "sessions.hpp"

// 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 null_callback = [](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)>(url).methods(
      boost::beast::http::verb::get)(null_callback);
  router.validate();
  EXPECT_EQ(router.findRoute(req).allowHeader, "GET");
  EXPECT_NE(router.findRoute(req).route.rule, nullptr);

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

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

TEST(Router, 404) {
  bool callback_called = false;
  // Callback handler that does nothing
  auto callback = [&](const Request& req,
                      const std::shared_ptr<bmcweb::AsyncResp>&) {
    BMCWEB_LOG_DEBUG << "=> req: " << req.target();
    callback_called = 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> async_resp =
        std::make_shared<bmcweb::AsyncResp>();
    router.handle(req, async_resp);
    BMCWEB_LOG_DEBUG << "=> res: "
                     << " resultInt: " << async_resp->res.resultInt()
                     << " reason: " << async_resp->res.reason();
  }

  EXPECT_TRUE(callback_called);
}

TEST(Router, 405) {
  // Callback handler that does nothing
  auto null_callback = [](const Request&,
                          const std::shared_ptr<bmcweb::AsyncResp>&) {};
  bool called = false;
  auto not_allowed_callback =
      [&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)>(url).methods(
      boost::beast::http::verb::get)(null_callback);
  router.newRuleTagged<getParameterTag(url)>("/foo/<path>")
      .methodNotAllowed()(not_allowed_callback);
  router.validate();
  {
    std::shared_ptr<bmcweb::AsyncResp> async_resp =
        std::make_shared<bmcweb::AsyncResp>();

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

#if !defined(PLATFORM_PLUGINS_ENABLED) &&      \
    !defined(GOOGLE_COMMON_PLUGINS_ENABLED) && \
    !defined(GOOGLE_PLUGINS_INTERNAL_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

#if defined(PLATFORM_PLUGINS_ENABLED) ||      \
    defined(GOOGLE_COMMON_PLUGINS_ENABLED) || \
    defined(GOOGLE_PLUGINS_INTERNAL_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