// Copyright 2020 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 <cmath>

#include "dawn/tests/unittests/validation/DeprecatedAPITests.h"

#include "dawn/common/Constants.h"
#include "dawn/utils/ComboRenderPipelineDescriptor.h"
#include "dawn/utils/WGPUHelpers.h"

WGPUDevice DeprecationTests::CreateTestDevice(dawn::native::Adapter dawnAdapter) {
    wgpu::DeviceDescriptor descriptor = {};
    return dawnAdapter.CreateDevice(&descriptor);
}

// Test that setting attachment rather than view for render pass color and depth/stencil attachments
// is deprecated.
TEST_P(DeprecationTests, ReadOnlyDepthStencilStoreLoadOpsAttachment) {
    utils::BasicRenderPass renderPass = utils::CreateBasicRenderPass(device, 1, 1);
    wgpu::RenderPassEncoder pass;

    // Check that setting load/store ops with read only depth/stencil attachments gives a warning.
    wgpu::TextureDescriptor descriptor;
    descriptor.dimension = wgpu::TextureDimension::e2D;
    descriptor.size = {1, 1, 1};
    descriptor.sampleCount = 1;
    descriptor.format = wgpu::TextureFormat::Depth24PlusStencil8;
    descriptor.mipLevelCount = 1;
    descriptor.usage = wgpu::TextureUsage::RenderAttachment;
    wgpu::Texture depthStencil = device.CreateTexture(&descriptor);

    wgpu::RenderPassDepthStencilAttachment* depthAttachment =
        &renderPass.renderPassInfo.cDepthStencilAttachmentInfo;
    renderPass.renderPassInfo.depthStencilAttachment = depthAttachment;
    depthAttachment->view = depthStencil.CreateView();
    depthAttachment->depthReadOnly = true;
    depthAttachment->stencilReadOnly = true;

    depthAttachment->depthLoadOp = wgpu::LoadOp::Load;
    depthAttachment->depthStoreOp = wgpu::StoreOp::Store;
    depthAttachment->stencilLoadOp = wgpu::LoadOp::Undefined;
    depthAttachment->stencilStoreOp = wgpu::StoreOp::Undefined;

    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        EXPECT_DEPRECATION_WARNING_ONLY(pass = encoder.BeginRenderPass(&renderPass.renderPassInfo));
        pass.End();
        EXPECT_DEPRECATION_ERROR_ONLY(encoder.Finish(););
    }

    depthAttachment->depthLoadOp = wgpu::LoadOp::Undefined;
    depthAttachment->depthStoreOp = wgpu::StoreOp::Undefined;
    depthAttachment->stencilLoadOp = wgpu::LoadOp::Load;
    depthAttachment->stencilStoreOp = wgpu::StoreOp::Store;

    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        EXPECT_DEPRECATION_WARNING_ONLY(pass = encoder.BeginRenderPass(&renderPass.renderPassInfo));
        pass.End();
        EXPECT_DEPRECATION_ERROR_ONLY(encoder.Finish(););
    }
}

// Test that endPass() is deprecated for both render and compute passes.
TEST_P(DeprecationTests, EndPass) {
    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();

    {
        utils::BasicRenderPass renderPass = utils::CreateBasicRenderPass(device, 1, 1);
        wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass.renderPassInfo);

        EXPECT_DEPRECATION_ERROR_OR_WARNING(pass.EndPass());
    }

    {
        wgpu::ComputePassEncoder pass = encoder.BeginComputePass();

        EXPECT_DEPRECATION_ERROR_OR_WARNING(pass.EndPass());
    }
}

// Test that dispatch() and dispatchIndirect() is deprecated.
TEST_P(DeprecationTests, Dispatch) {
    wgpu::ShaderModule module = utils::CreateShaderModule(device, R"(
            @compute @workgroup_size(1, 1, 1)
            fn main() {
            })");

    wgpu::ComputePipelineDescriptor csDesc;
    csDesc.compute.module = module;
    csDesc.compute.entryPoint = "main";
    wgpu::ComputePipeline pipeline = device.CreateComputePipeline(&csDesc);

    std::array<uint32_t, 3> indirectBufferData = {1, 0, 0};

    wgpu::Buffer indirectBuffer = utils::CreateBufferFromData(
        device, &indirectBufferData[0], indirectBufferData.size() * sizeof(uint32_t),
        wgpu::BufferUsage::Indirect);

    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
    wgpu::ComputePassEncoder pass = encoder.BeginComputePass();
    pass.SetPipeline(pipeline);

    EXPECT_DEPRECATION_ERROR_OR_WARNING(pass.Dispatch(1));

    EXPECT_DEPRECATION_ERROR_OR_WARNING(pass.DispatchIndirect(indirectBuffer, 0));

    pass.End();
}

// Test that creating a buffer with size exceeding the maximum buffer size limit should emits a
// warning. (dawn:1525)
TEST_P(DeprecationTests, MaxBufferSizeValidation) {
    wgpu::BufferDescriptor descriptor;
    descriptor.usage = wgpu::BufferUsage::CopySrc | wgpu::BufferUsage::CopyDst;

    descriptor.size = 256;
    device.CreateBuffer(&descriptor);

    descriptor.size = GetSupportedLimits().limits.maxBufferSize;
    device.CreateBuffer(&descriptor);

    descriptor.size = GetSupportedLimits().limits.maxBufferSize + 1;
    EXPECT_DEPRECATION_ERROR_OR_WARNING(device.CreateBuffer(&descriptor));
}

// Test that multisampled texture with sampleType == float should be deprecated.
TEST_P(DeprecationTests, MultisampledTextureSampleType) {
    EXPECT_DEPRECATION_ERROR_OR_WARNING(utils::MakeBindGroupLayout(
        device, {
                    {0, wgpu::ShaderStage::Compute, wgpu::TextureSampleType::Float,
                     wgpu::TextureViewDimension::e2D, true},
                }));
}

INSTANTIATE_TEST_SUITE_P(DeprecatedAPITest,
                         DeprecationTests,
                         testing::Values(true, false),
                         [](const testing::TestParamInfo<DeprecationTests::ParamType>& info) {
                             return info.param ? "Disallowed" : "Allowed";
                         });