// Copyright 2021 The Dawn Authors
//
// 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 "tests/unittests/wire/WireTest.h"

#include "dawn_wire/WireClient.h"

using namespace testing;
using namespace dawn_wire;

namespace {

    // Mock class to add expectations on the wire calling callbacks
    class MockCompilationInfoCallback {
      public:
        MOCK_METHOD(void,
                    Call,
                    (WGPUCompilationInfoRequestStatus status,
                     const WGPUCompilationInfo* info,
                     void* userdata));
    };

    std::unique_ptr<StrictMock<MockCompilationInfoCallback>> mockCompilationInfoCallback;
    void ToMockGetCompilationInfoCallback(WGPUCompilationInfoRequestStatus status,
                                          const WGPUCompilationInfo* info,
                                          void* userdata) {
        mockCompilationInfoCallback->Call(status, info, userdata);
    }

}  // anonymous namespace

class WireShaderModuleTests : public WireTest {
  public:
    WireShaderModuleTests() {
    }
    ~WireShaderModuleTests() override = default;

    void SetUp() override {
        WireTest::SetUp();

        mockCompilationInfoCallback = std::make_unique<StrictMock<MockCompilationInfoCallback>>();
        apiShaderModule = api.GetNewShaderModule();

        WGPUShaderModuleDescriptor descriptor = {};
        shaderModule = wgpuDeviceCreateShaderModule(device, &descriptor);

        EXPECT_CALL(api, DeviceCreateShaderModule(apiDevice, _))
            .WillOnce(Return(apiShaderModule))
            .RetiresOnSaturation();
        FlushClient();
    }

    void TearDown() override {
        WireTest::TearDown();

        // Delete mock so that expectations are checked
        mockCompilationInfoCallback = nullptr;
    }

    void FlushClient() {
        WireTest::FlushClient();
        Mock::VerifyAndClearExpectations(&mockCompilationInfoCallback);
    }

    void FlushServer() {
        WireTest::FlushServer();
        Mock::VerifyAndClearExpectations(&mockCompilationInfoCallback);
    }

  protected:
    WGPUShaderModule shaderModule;
    WGPUShaderModule apiShaderModule;
};

// Check getting CompilationInfo for a successfully created shader module
TEST_F(WireShaderModuleTests, GetCompilationInfo) {
    wgpuShaderModuleGetCompilationInfo(shaderModule, ToMockGetCompilationInfoCallback, nullptr);

    WGPUCompilationMessage message = {"Test Message", WGPUCompilationMessageType_Info, 2, 4, 6, 8};
    WGPUCompilationInfo compilationInfo;
    compilationInfo.messageCount = 1;
    compilationInfo.messages = &message;

    EXPECT_CALL(api, OnShaderModuleGetCompilationInfo(apiShaderModule, _, _))
        .WillOnce(InvokeWithoutArgs([&]() {
            api.CallShaderModuleGetCompilationInfoCallback(
                apiShaderModule, WGPUCompilationInfoRequestStatus_Success, &compilationInfo);
        }));

    FlushClient();

    EXPECT_CALL(*mockCompilationInfoCallback,
                Call(WGPUCompilationInfoRequestStatus_Success,
                     MatchesLambda([&](const WGPUCompilationInfo* info) -> bool {
                         if (info->messageCount != compilationInfo.messageCount) {
                             return false;
                         }
                         const WGPUCompilationMessage* infoMessage = &info->messages[0];
                         return strcmp(infoMessage->message, message.message) == 0 &&
                                infoMessage->type == message.type &&
                                infoMessage->lineNum == message.lineNum &&
                                infoMessage->linePos == message.linePos &&
                                infoMessage->offset == message.offset &&
                                infoMessage->length == message.length;
                     }),
                     _))
        .Times(1);
    FlushServer();
}

// Test that calling GetCompilationInfo then disconnecting the wire calls the callback with a device
// loss.
TEST_F(WireShaderModuleTests, GetCompilationInfoBeforeDisconnect) {
    wgpuShaderModuleGetCompilationInfo(shaderModule, ToMockGetCompilationInfoCallback, nullptr);

    WGPUCompilationMessage message = {"Test Message", WGPUCompilationMessageType_Info, 2, 4, 6, 8};
    WGPUCompilationInfo compilationInfo;
    compilationInfo.messageCount = 1;
    compilationInfo.messages = &message;

    EXPECT_CALL(api, OnShaderModuleGetCompilationInfo(apiShaderModule, _, _))
        .WillOnce(InvokeWithoutArgs([&]() {
            api.CallShaderModuleGetCompilationInfoCallback(
                apiShaderModule, WGPUCompilationInfoRequestStatus_Success, &compilationInfo);
        }));
    FlushClient();

    EXPECT_CALL(*mockCompilationInfoCallback,
                Call(WGPUCompilationInfoRequestStatus_DeviceLost, nullptr, _));
    GetWireClient()->Disconnect();
}

// Test that calling GetCompilationInfo after disconnecting the wire calls the callback with a
// device loss.
TEST_F(WireShaderModuleTests, GetCompilationInfoAfterDisconnect) {
    GetWireClient()->Disconnect();
    EXPECT_CALL(*mockCompilationInfoCallback,
                Call(WGPUCompilationInfoRequestStatus_DeviceLost, nullptr, _));
    wgpuShaderModuleGetCompilationInfo(shaderModule, ToMockGetCompilationInfoCallback, nullptr);
}