// Copyright 2019 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. 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.
//
// 3. Neither the name of the copyright holder 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 HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "dawn/tests/unittests/wire/WireTest.h"

#include "dawn/dawn_proc.h"
#include "dawn/utils/TerribleCommandBuffer.h"
#include "dawn/wire/WireClient.h"
#include "dawn/wire/WireServer.h"

using testing::_;
using testing::AnyNumber;
using testing::Exactly;
using testing::Mock;
using testing::Return;

WireTest::WireTest() {}

WireTest::~WireTest() {}

dawn::wire::client::MemoryTransferService* WireTest::GetClientMemoryTransferService() {
    return nullptr;
}

dawn::wire::server::MemoryTransferService* WireTest::GetServerMemoryTransferService() {
    return nullptr;
}

void WireTest::SetUp() {
    DawnProcTable mockProcs;
    api.GetProcTable(&mockProcs);

    // This SetCallback call cannot be ignored because it is done as soon as we start the server
    EXPECT_CALL(api, OnDeviceSetUncapturedErrorCallback(_, _, _)).Times(Exactly(1));
    EXPECT_CALL(api, OnDeviceSetLoggingCallback(_, _, _)).Times(Exactly(1));
    EXPECT_CALL(api, OnDeviceSetDeviceLostCallback(_, _, _)).Times(Exactly(1));
    SetupIgnoredCallExpectations();

    mS2cBuf = std::make_unique<dawn::utils::TerribleCommandBuffer>();
    mC2sBuf = std::make_unique<dawn::utils::TerribleCommandBuffer>(mWireServer.get());

    dawn::wire::WireServerDescriptor serverDesc = {};
    serverDesc.procs = &mockProcs;
    serverDesc.serializer = mS2cBuf.get();
    serverDesc.memoryTransferService = GetServerMemoryTransferService();

    mWireServer.reset(new dawn::wire::WireServer(serverDesc));
    mC2sBuf->SetHandler(mWireServer.get());

    dawn::wire::WireClientDescriptor clientDesc = {};
    clientDesc.serializer = mC2sBuf.get();
    clientDesc.memoryTransferService = GetClientMemoryTransferService();

    mWireClient.reset(new dawn::wire::WireClient(clientDesc));
    mS2cBuf->SetHandler(mWireClient.get());

    dawnProcSetProcs(&dawn::wire::client::GetProcs());

    auto instanceReservation = GetWireClient()->ReserveInstance();
    instance = instanceReservation.instance;
    apiInstance = api.GetNewInstance();
    EXPECT_CALL(api, InstanceReference(apiInstance));
    EXPECT_TRUE(GetWireServer()->InjectInstance(apiInstance, instanceReservation.id,
                                                instanceReservation.generation));

    auto deviceReservation = mWireClient->ReserveDevice(instance);
    device = deviceReservation.device;
    apiDevice = api.GetNewDevice();
    EXPECT_CALL(api, DeviceReference(apiDevice));
    mWireServer->InjectDevice(apiDevice, deviceReservation.id, deviceReservation.generation);

    // The GetQueue is done on WireClient startup so we expect it now.
    queue = wgpuDeviceGetQueue(device);
    apiQueue = api.GetNewQueue();
    EXPECT_CALL(api, DeviceGetQueue(apiDevice)).WillOnce(Return(apiQueue));
    FlushClient();
}

void WireTest::TearDown() {
    dawnProcSetProcs(nullptr);

    // Derived classes should call the base TearDown() first. The client must
    // be reset before any mocks are deleted.
    // Incomplete client callbacks will be called on deletion, so the mocks
    // cannot be null.
    api.IgnoreAllReleaseCalls();
    mWireClient = nullptr;

    if (mWireServer && apiDevice) {
        // These are called on server destruction to clear the callbacks. They must not be
        // called after the server is destroyed.
        EXPECT_CALL(api, OnDeviceSetUncapturedErrorCallback(apiDevice, nullptr, nullptr))
            .Times(Exactly(1));
        EXPECT_CALL(api, OnDeviceSetLoggingCallback(apiDevice, nullptr, nullptr)).Times(Exactly(1));
        EXPECT_CALL(api, OnDeviceSetDeviceLostCallback(apiDevice, nullptr, nullptr))
            .Times(Exactly(1));
    }
    mWireServer = nullptr;
}

// This should be called if |apiDevice| is no longer exists on the wire.
// This signals that expectations in |TearDowb| shouldn't be added.
void WireTest::DefaultApiDeviceWasReleased() {
    apiDevice = nullptr;
}

void WireTest::FlushClient(bool success) {
    ASSERT_EQ(mC2sBuf->Flush(), success);

    Mock::VerifyAndClearExpectations(&api);
    SetupIgnoredCallExpectations();
}

void WireTest::FlushServer(bool success) {
    ASSERT_EQ(mS2cBuf->Flush(), success);
}

dawn::wire::WireServer* WireTest::GetWireServer() {
    return mWireServer.get();
}

dawn::wire::WireClient* WireTest::GetWireClient() {
    return mWireClient.get();
}

void WireTest::DeleteServer() {
    EXPECT_CALL(api, QueueRelease(apiQueue)).Times(1);
    EXPECT_CALL(api, DeviceRelease(apiDevice)).Times(1);
    EXPECT_CALL(api, InstanceRelease(apiInstance)).Times(1);

    if (mWireServer) {
        // These are called on server destruction to clear the callbacks. They must not be
        // called after the server is destroyed.
        EXPECT_CALL(api, OnDeviceSetUncapturedErrorCallback(apiDevice, nullptr, nullptr))
            .Times(Exactly(1));
        EXPECT_CALL(api, OnDeviceSetLoggingCallback(apiDevice, nullptr, nullptr)).Times(Exactly(1));
        EXPECT_CALL(api, OnDeviceSetDeviceLostCallback(apiDevice, nullptr, nullptr))
            .Times(Exactly(1));
    }
    mWireServer = nullptr;
}

void WireTest::DeleteClient() {
    mWireClient = nullptr;
}

void WireTest::SetupIgnoredCallExpectations() {
    EXPECT_CALL(api, InstanceProcessEvents(_)).Times(AnyNumber());
    EXPECT_CALL(api, DeviceTick(_)).Times(AnyNumber());
}
