// Copyright 2026 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
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//    this list of conditions and the following disclaimer in the documentation
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#include <gmock/gmock.h>
#include <gtest/gtest.h>

#include "src/dawn/native/Limits.h"
#include "src/dawn/native/ShaderModule.h"

namespace dawn::native {
namespace {

LimitsForCompilationRequest MakeWorkgroupLimits() {
    LimitsForCompilationRequest limits = {};
    limits.maxComputeWorkgroupSizeX = 256;
    limits.maxComputeWorkgroupSizeY = 256;
    limits.maxComputeWorkgroupSizeZ = 64;
    limits.maxComputeInvocationsPerWorkgroup = 256;
    limits.maxComputeWorkgroupStorageSize = 16384;
    return limits;
}

TEST(ShaderModuleTests, SubgroupMatrixUsesExplicitSubgroupSizeForWorkgroupValidation) {
    tint::WorkgroupInfo workgroupInfo;
    workgroupInfo.x = 32;
    workgroupInfo.y = 1;
    workgroupInfo.z = 1;
    workgroupInfo.subgroup_size = 32;

    auto limits = MakeWorkgroupLimits();
    auto result = ValidateComputeStageWorkgroupSize(workgroupInfo, true, 64, limits, limits);
    if (result.IsError()) {
        FAIL() << result.AcquireError()->GetMessage();
    }
    Extent3D workgroupSize = result.AcquireSuccess();
    EXPECT_EQ(workgroupSize.width, 32u);
    EXPECT_EQ(workgroupSize.height, 1u);
    EXPECT_EQ(workgroupSize.depthOrArrayLayers, 1u);
}

TEST(ShaderModuleTests, SubgroupMatrixUsesMaximumSubgroupSizeWithoutExplicitSize) {
    tint::WorkgroupInfo workgroupInfo;
    workgroupInfo.x = 32;
    workgroupInfo.y = 1;
    workgroupInfo.z = 1;

    auto limits = MakeWorkgroupLimits();
    auto result = ValidateComputeStageWorkgroupSize(workgroupInfo, true, 64, limits, limits);
    if (!result.IsError()) {
        result.AcquireSuccess();
        FAIL() << "Expected workgroup validation to fail";
    }
    EXPECT_THAT(result.AcquireError()->GetMessage(), testing::HasSubstr("maxSubgroupSize (64)"));
}

}  // anonymous namespace
}  // namespace dawn::native