// Copyright 2020 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
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// 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 "gmock/gmock.h"
#include "src/tint/lang/msl/writer/ast_printer/helper_test.h"

namespace tint::msl::writer {
namespace {

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

using MslASTPrinterTest_Constructor = TestHelper;

TEST_F(MslASTPrinterTest_Constructor, Bool) {
    WrapInFunction(Expr(false));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("false"));
}

TEST_F(MslASTPrinterTest_Constructor, Int) {
    WrapInFunction(Expr(-12345_i));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("-12345"));
}

TEST_F(MslASTPrinterTest_Constructor, UInt) {
    WrapInFunction(Expr(56779_u));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("56779u"));
}

TEST_F(MslASTPrinterTest_Constructor, Float) {
    // Use a number close to 1<<30 but whose decimal representation ends in 0.
    WrapInFunction(Expr(f32((1 << 30) - 4)));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("1073741824.0f"));
}

TEST_F(MslASTPrinterTest_Constructor, F16) {
    Enable(wgsl::Extension::kF16);

    // Use a number close to 1<<16 but whose decimal representation ends in 0.
    WrapInFunction(Expr(f16((1 << 15) - 8)));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("32752.0h"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Float) {
    WrapInFunction(Call<f32>(-1.2e-5_f));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("-0.00001200000042445026f"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_F16) {
    Enable(wgsl::Extension::kF16);

    WrapInFunction(Call<f16>(-1.2e-3_h));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("-0.0011997222900390625h"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Bool) {
    WrapInFunction(Call<bool>(true));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("true"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Int) {
    WrapInFunction(Call<i32>(-12345_i));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("-12345"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Uint) {
    WrapInFunction(Call<u32>(12345_u));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("12345u"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_F32) {
    WrapInFunction(Call<vec3<f32>>(1_f, 2_f, 3_f));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("float3(1.0f, 2.0f, 3.0f)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_F16) {
    Enable(wgsl::Extension::kF16);

    WrapInFunction(Call<vec3<f16>>(1_h, 2_h, 3_h));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("half3(1.0h, 2.0h, 3.0h)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_Empty_F32) {
    WrapInFunction(Call<vec3<f32>>());

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("float3(0.0f)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_Empty_F16) {
    Enable(wgsl::Extension::kF16);

    WrapInFunction(Call<vec3<f16>>());

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("half3(0.0h)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_SingleScalar_F32_Literal) {
    WrapInFunction(Call<vec3<f32>>(2_f));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("float3(2.0f)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_SingleScalar_F16_Literal) {
    Enable(wgsl::Extension::kF16);

    WrapInFunction(Call<vec3<f16>>(2_h));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("half3(2.0h)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_SingleScalar_F32_Var) {
    auto* var = Var("v", Expr(2_f));
    auto* cast = Call<vec3<f32>>(var);
    WrapInFunction(var, cast);

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr(R"(float v = 2.0f;
  float3 const tint_symbol = float3(v);)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_SingleScalar_F16_Var) {
    Enable(wgsl::Extension::kF16);

    auto* var = Var("v", Expr(2_h));
    auto* cast = Call<vec3<f16>>(var);
    WrapInFunction(var, cast);

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr(R"(half v = 2.0h;
  half3 const tint_symbol = half3(v);)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_SingleScalar_Bool) {
    WrapInFunction(Call<vec3<bool>>(true));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("bool3(true)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_SingleScalar_Int) {
    WrapInFunction(Call<vec3<i32>>(2_i));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("int3(2)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Vec_SingleScalar_UInt) {
    WrapInFunction(Call<vec3<u32>>(2_u));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("uint3(2u)"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_F32) {
    WrapInFunction(
        Call<mat2x3<f32>>(Call<vec3<f32>>(1_f, 2_f, 3_f), Call<vec3<f32>>(3_f, 4_f, 5_f)));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(),
                HasSubstr("float2x3(float3(1.0f, 2.0f, 3.0f), float3(3.0f, 4.0f, 5.0f))"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_F16) {
    Enable(wgsl::Extension::kF16);

    WrapInFunction(
        Call<mat2x3<f16>>(Call<vec3<f16>>(1_h, 2_h, 3_h), Call<vec3<f16>>(3_h, 4_h, 5_h)));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(),
                HasSubstr("half2x3(half3(1.0h, 2.0h, 3.0h), half3(3.0h, 4.0h, 5.0h))"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_Complex_F32) {
    // mat4x4<f32>(
    //     vec4<f32>(2.0f, 3.0f, 4.0f, 8.0f),
    //     vec4<f32>(),
    //     vec4<f32>(7.0f),
    //     vec4<f32>(vec4<f32>(42.0f, 21.0f, 6.0f, -5.0f)),
    //   );
    auto* vector_literal = Call<vec4<f32>>(f32(2.0), f32(3.0), f32(4.0), f32(8.0));
    auto* vector_zero_init = Call<vec4<f32>>();
    auto* vector_single_scalar_init = Call<vec4<f32>>(f32(7.0));
    auto* vector_identical_init =
        Call<vec4<f32>>(Call<vec4<f32>>(f32(42.0), f32(21.0), f32(6.0), f32(-5.0)));

    auto* constructor = Call<mat4x4<f32>>(vector_literal, vector_zero_init,
                                          vector_single_scalar_init, vector_identical_init);

    WrapInFunction(constructor);

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(), HasSubstr("float4x4(float4(2.0f, 3.0f, 4.0f, 8.0f), float4(0.0f), "
                                        "float4(7.0f), float4(42.0f, 21.0f, 6.0f, -5.0f))"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_Complex_F16) {
    // mat4x4<f16>(
    //     vec4<f16>(2.0h, 3.0h, 4.0h, 8.0h),
    //     vec4<f16>(),
    //     vec4<f16>(7.0h),
    //     vec4<f16>(vec4<f16>(42.0h, 21.0h, 6.0h, -5.0h)),
    //   );
    Enable(wgsl::Extension::kF16);

    auto* vector_literal = Call<vec4<f16>>(f16(2.0), f16(3.0), f16(4.0), f16(8.0));
    auto* vector_zero_init = Call<vec4<f16>>();
    auto* vector_single_scalar_init = Call<vec4<f16>>(f16(7.0));
    auto* vector_identical_init =
        Call<vec4<f16>>(Call<vec4<f16>>(f16(42.0), f16(21.0), f16(6.0), f16(-5.0)));

    auto* constructor = Call<mat4x4<f16>>(vector_literal, vector_zero_init,
                                          vector_single_scalar_init, vector_identical_init);

    WrapInFunction(constructor);

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(), HasSubstr("half4x4(half4(2.0h, 3.0h, 4.0h, 8.0h), half4(0.0h), "
                                        "half4(7.0h), half4(42.0h, 21.0h, 6.0h, -5.0h))"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_Empty_F32) {
    WrapInFunction(Call<mat2x3<f32>>());

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(),
                HasSubstr("float2x3 const tint_symbol = float2x3(float3(0.0f), float3(0.0f))"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_Empty_F16) {
    Enable(wgsl::Extension::kF16);

    WrapInFunction(Call<mat2x3<f16>>());

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(),
                HasSubstr("half2x3 const tint_symbol = half2x3(half3(0.0h), half3(0.0h))"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_Identity_F32) {
    // fn f() {
    //     var m_1: mat4x4<f32> = mat4x4<f32>();
    //     var m_2: mat4x4<f32> = mat4x4<f32>(m_1);
    // }

    auto* m_1 = Var("m_1", ty.mat4x4(ty.f32()), Call<mat4x4<f32>>());
    auto* m_2 = Var("m_2", ty.mat4x4(ty.f32()), Call<mat4x4<f32>>(m_1));

    WrapInFunction(m_1, m_2);

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(), HasSubstr("float4x4 m_2 = float4x4(m_1);"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Mat_Identity_F16) {
    // fn f() {
    //     var m_1: mat4x4<f16> = mat4x4<f16>();
    //     var m_2: mat4x4<f16> = mat4x4<f16>(m_1);
    // }

    Enable(wgsl::Extension::kF16);

    auto* m_1 = Var("m_1", ty.mat4x4(ty.f16()), Call<mat4x4<f16>>());
    auto* m_2 = Var("m_2", ty.mat4x4(ty.f16()), Call<mat4x4<f16>>(m_1));

    WrapInFunction(m_1, m_2);

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();

    EXPECT_THAT(gen.Result(), HasSubstr("half4x4 m_2 = half4x4(m_1);"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Array) {
    WrapInFunction(Call<array<vec3<f32>, 3>>(Call<vec3<f32>>(1_f, 2_f, 3_f),
                                             Call<vec3<f32>>(4_f, 5_f, 6_f),
                                             Call<vec3<f32>>(7_f, 8_f, 9_f)));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("{float3(1.0f, 2.0f, 3.0f), float3(4.0f, 5.0f, 6.0f), "
                                        "float3(7.0f, 8.0f, 9.0f)}"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Struct) {
    auto* str = Structure("S", Vector{
                                   Member("a", ty.i32()),
                                   Member("b", ty.f32()),
                                   Member("c", ty.vec3<i32>()),
                               });

    WrapInFunction(Call(ty.Of(str), 1_i, 2_f, Call<vec3<i32>>(3_i, 4_i, 5_i)));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("{.a=1, .b=2.0f, .c=int3(3, 4, 5)}"));
}

TEST_F(MslASTPrinterTest_Constructor, Type_Struct_Empty) {
    auto* str = Structure("S", Vector{
                                   Member("a", ty.i32()),
                                   Member("b", ty.f32()),
                                   Member("c", ty.vec3<i32>()),
                               });

    WrapInFunction(Call(ty.Of(str)));

    ASTPrinter& gen = Build();

    ASSERT_TRUE(gen.Generate()) << gen.Diagnostics();
    EXPECT_THAT(gen.Result(), HasSubstr("{}"));
    EXPECT_THAT(gen.Result(), testing::Not(HasSubstr("{{}}")));
}

}  // namespace
}  // namespace tint::msl::writer