// Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <cstddef>
#include <optional>
#include <string>
#include <vector>

#include "catch2/catch_test_macros.hpp"
#include "src/buildtool/auth/authentication.hpp"
#include "src/buildtool/common/artifact_digest.hpp"
#include "src/buildtool/common/remote/retry_config.hpp"
#include "src/buildtool/compatibility/compatibility.hpp"
#include "src/buildtool/crypto/hash_function.hpp"
#include "src/buildtool/execution_api/bazel_msg/bazel_blob_container.hpp"
#include "src/buildtool/execution_api/remote/bazel/bazel_execution_client.hpp"
#include "src/buildtool/execution_api/remote/bazel/bazel_network.hpp"
#include "src/buildtool/execution_api/remote/config.hpp"
#include "src/buildtool/file_system/object_type.hpp"
#include "test/utils/remote_execution/test_auth_config.hpp"
#include "test/utils/remote_execution/test_remote_config.hpp"

constexpr std::size_t kLargeSize = GRPC_DEFAULT_MAX_RECV_MESSAGE_LENGTH + 1;

TEST_CASE("Bazel network: write/read blobs", "[execution_api]") {
    std::string instance_name{"remote-execution"};

    auto auth_config = TestAuthConfig::ReadFromEnvironment();
    REQUIRE(auth_config);

    auto remote_config = TestRemoteConfig::ReadFromEnvironment();
    REQUIRE(remote_config);
    REQUIRE(remote_config->remote_address);

    RetryConfig retry_config{};  // default retry config

    HashFunction const hash_function{Compatibility::IsCompatible()
                                         ? HashFunction::JustHash::Compatible
                                         : HashFunction::JustHash::Native};

    auto network = BazelNetwork{instance_name,
                                remote_config->remote_address->host,
                                remote_config->remote_address->port,
                                &*auth_config,
                                &retry_config,
                                {},
                                hash_function};

    std::string content_foo("foo");
    std::string content_bar("bar");
    std::string content_baz(kLargeSize, 'x');  // single larger blob

    BazelBlob foo{
        ArtifactDigest::Create<ObjectType::File>(hash_function, content_foo),
        content_foo,
        /*is_exec=*/false};
    BazelBlob bar{
        ArtifactDigest::Create<ObjectType::File>(hash_function, content_bar),
        content_bar,
        /*is_exec=*/false};
    BazelBlob baz{
        ArtifactDigest::Create<ObjectType::File>(hash_function, content_baz),
        content_baz,
        /*is_exec=*/false};

    // Search blobs via digest
    REQUIRE(network.UploadBlobs(BazelBlobContainer{{foo, bar, baz}}));

    // Read blobs in order
    auto reader = network.CreateReader();
    std::vector<bazel_re::Digest> to_read{
        foo.digest, bar.digest, baz.digest, bar.digest, foo.digest};
    std::vector<ArtifactBlob> blobs{};
    for (auto next : reader.ReadIncrementally(to_read)) {
        blobs.insert(blobs.end(), next.begin(), next.end());
    }

    // Check order maintained
    REQUIRE(blobs.size() == 5);
    CHECK(*blobs[0].data == content_foo);
    CHECK(*blobs[1].data == content_bar);
    CHECK(*blobs[2].data == content_baz);
    CHECK(*blobs[3].data == content_bar);
    CHECK(*blobs[4].data == content_foo);
}

TEST_CASE("Bazel network: read blobs with unknown size", "[execution_api]") {
    if (Compatibility::IsCompatible()) {
        // only supported in native mode
        return;
    }

    std::string instance_name{"remote-execution"};

    auto auth_config = TestAuthConfig::ReadFromEnvironment();
    REQUIRE(auth_config);

    auto remote_config = TestRemoteConfig::ReadFromEnvironment();
    REQUIRE(remote_config);
    REQUIRE(remote_config->remote_address);

    RetryConfig retry_config{};  // default retry config

    HashFunction const hash_function{Compatibility::IsCompatible()
                                         ? HashFunction::JustHash::Compatible
                                         : HashFunction::JustHash::Native};

    auto network = BazelNetwork{instance_name,
                                remote_config->remote_address->host,
                                remote_config->remote_address->port,
                                &*auth_config,
                                &retry_config,
                                {},
                                hash_function};

    std::string content_foo("foo");
    std::string content_bar(kLargeSize, 'x');  // single larger blob

    BazelBlob foo{
        ArtifactDigest::Create<ObjectType::File>(hash_function, content_foo),
        content_foo,
        /*is_exec=*/false};
    BazelBlob bar{
        ArtifactDigest::Create<ObjectType::File>(hash_function, content_bar),
        content_bar,
        /*is_exec=*/false};

    // Upload blobs
    REQUIRE(network.UploadBlobs(BazelBlobContainer{{foo, bar}}));

    // Set size to unknown
    foo.digest.set_size_bytes(0);
    bar.digest.set_size_bytes(0);

    // Read blobs
    auto reader = network.CreateReader();
    std::vector<bazel_re::Digest> to_read{foo.digest, bar.digest};
    std::vector<ArtifactBlob> blobs{};
    for (auto next : reader.ReadIncrementally(to_read)) {
        blobs.insert(blobs.end(), next.begin(), next.end());
    }

    // Check order maintained
    REQUIRE(blobs.size() == 2);
    CHECK(*blobs[0].data == content_foo);
    CHECK(*blobs[1].data == content_bar);
}