// Copyright 2022 The Tint 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 "gtest/gtest-spi.h"
#include "src/tint/lang/core/fluent_types.h"
#include "src/tint/lang/core/ir/builder.h"
#include "src/tint/lang/core/ir/ir_helper_test.h"
#include "src/tint/lang/core/ir/value.h"

using namespace tint::core::number_suffixes;  // NOLINT
using namespace tint::core::fluent_types;     // NOLINT

namespace tint::core::ir {
namespace {

using IR_ConstantTest = IRTestHelper;

TEST_F(IR_ConstantTest, f32) {
    StringStream str;

    auto* c = b.Constant(1.2_f);
    EXPECT_EQ(1.2_f, c->Value()->As<core::constant::Scalar<f32>>()->ValueAs<f32>());

    EXPECT_TRUE(c->Value()->Is<core::constant::Scalar<f32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f16>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<i32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<u32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<bool>>());
}

TEST_F(IR_ConstantTest, f16) {
    StringStream str;

    auto* c = b.Constant(1.1_h);
    EXPECT_EQ(1.1_h, c->Value()->As<core::constant::Scalar<f16>>()->ValueAs<f16>());

    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f32>>());
    EXPECT_TRUE(c->Value()->Is<core::constant::Scalar<f16>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<i32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<u32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<bool>>());
}

TEST_F(IR_ConstantTest, i32) {
    StringStream str;

    auto* c = b.Constant(1_i);
    EXPECT_EQ(1_i, c->Value()->As<core::constant::Scalar<i32>>()->ValueAs<i32>());

    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f16>>());
    EXPECT_TRUE(c->Value()->Is<core::constant::Scalar<i32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<u32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<bool>>());
}

TEST_F(IR_ConstantTest, u32) {
    StringStream str;

    auto* c = b.Constant(2_u);
    EXPECT_EQ(2_u, c->Value()->As<core::constant::Scalar<u32>>()->ValueAs<u32>());

    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f16>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<i32>>());
    EXPECT_TRUE(c->Value()->Is<core::constant::Scalar<u32>>());
    EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<bool>>());
}

TEST_F(IR_ConstantTest, bool) {
    {
        StringStream str;

        auto* c = b.Constant(false);
        EXPECT_FALSE(c->Value()->As<core::constant::Scalar<bool>>()->ValueAs<bool>());
    }

    {
        StringStream str;
        auto c = b.Constant(true);
        EXPECT_TRUE(c->Value()->As<core::constant::Scalar<bool>>()->ValueAs<bool>());

        EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f32>>());
        EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<f16>>());
        EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<i32>>());
        EXPECT_FALSE(c->Value()->Is<core::constant::Scalar<u32>>());
        EXPECT_TRUE(c->Value()->Is<core::constant::Scalar<bool>>());
    }
}

TEST_F(IR_ConstantTest, Fail_NullValue) {
    EXPECT_FATAL_FAILURE({ Constant c(nullptr); }, "");
}

TEST_F(IR_ConstantTest, Fail_Builder_NullValue) {
    EXPECT_FATAL_FAILURE(
        {
            Module mod;
            Builder b{mod};
            b.Constant(nullptr);
        },
        "");
}

}  // namespace
}  // namespace tint::core::ir