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#include "src/tint/lang/core/fluent_types.h"
#include "src/tint/lang/glsl/writer/helper_test.h"
#include "src/tint/utils/text/string_stream.h"

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

namespace tint::glsl::writer {
namespace {

struct BinaryData {
    const char* result;
    core::BinaryOp op;
};
inline std::ostream& operator<<(std::ostream& out, BinaryData data) {
    StringStream str;
    str << data.op;
    out << str.str();
    return out;
}

using GlslWriterBinaryTest = GlslWriterTestWithParam<BinaryData>;
TEST_P(GlslWriterBinaryTest, Emit) {
    auto params = GetParam();

    auto* func = b.ComputeFunction("main");
    b.Append(func->Block(), [&] {
        auto* l = b.Let("left", b.Constant(1_u));
        auto* r = b.Let("right", b.Constant(2_u));
        auto* bin = b.Binary(params.op, ty.u32(), l, r);
        b.Let("val", bin);
        b.Return(func);
    });

    Options opts{};
    opts.disable_polyfill_integer_div_mod = true;
    auto result = Generate(opts);
    ASSERT_EQ(result, Success) << result.Failure().reason << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  uint left = 1u;
  uint right = 2u;
  uint val = )" + params.result +
                                R"(;
}
)");
}
INSTANTIATE_TEST_SUITE_P(
    GlslWriterTest,
    GlslWriterBinaryTest,
    testing::Values(BinaryData{"(left + right)", core::BinaryOp::kAdd},
                    BinaryData{"(left - right)", core::BinaryOp::kSubtract},
                    BinaryData{"(left * right)", core::BinaryOp::kMultiply},
                    BinaryData{"(left / right)", core::BinaryOp::kDivide},
                    BinaryData{"(left % right)", core::BinaryOp::kModulo},
                    BinaryData{"(left & right)", core::BinaryOp::kAnd},
                    BinaryData{"(left | right)", core::BinaryOp::kOr},
                    BinaryData{"(left ^ right)", core::BinaryOp::kXor},
                    BinaryData{"(left << (right & 31u))", core::BinaryOp::kShiftLeft},
                    BinaryData{"(left >> (right & 31u))", core::BinaryOp::kShiftRight}));

using GlslWriterBinaryBoolTest = GlslWriterTestWithParam<BinaryData>;
TEST_P(GlslWriterBinaryBoolTest, Emit) {
    auto params = GetParam();

    auto* func = b.ComputeFunction("main");
    b.Append(func->Block(), [&] {
        auto* l = b.Let("left", b.Constant(1_u));
        auto* r = b.Let("right", b.Constant(2_u));
        auto* bin = b.Binary(params.op, ty.bool_(), l, r);
        b.Let("val", bin);
        b.Return(func);
    });

    auto result = Generate();
    ASSERT_EQ(result, Success) << result.Failure().reason << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  uint left = 1u;
  uint right = 2u;
  bool val = )" + params.result +
                                R"(;
}
)");
}
INSTANTIATE_TEST_SUITE_P(
    GlslWriterTest,
    GlslWriterBinaryBoolTest,
    testing::Values(BinaryData{"(left == right)", core::BinaryOp::kEqual},
                    BinaryData{"(left != right)", core::BinaryOp::kNotEqual},
                    BinaryData{"(left < right)", core::BinaryOp::kLessThan},
                    BinaryData{"(left > right)", core::BinaryOp::kGreaterThan},
                    BinaryData{"(left <= right)", core::BinaryOp::kLessThanEqual},
                    BinaryData{"(left >= right)", core::BinaryOp::kGreaterThanEqual}));

using GlslWriterBinaryBitwiseBoolTest = GlslWriterTestWithParam<BinaryData>;
TEST_P(GlslWriterBinaryBitwiseBoolTest, Emit) {
    auto params = GetParam();

    auto* func = b.ComputeFunction("main");
    b.Append(func->Block(), [&] {
        auto* l = b.Let("left", b.Constant(true));
        auto* r = b.Let("right", b.Constant(false));
        auto* bin = b.Binary(params.op, ty.bool_(), l, r);
        b.Let("val", bin);
        b.Return(func);
    });

    auto result = Generate();
    ASSERT_EQ(result, Success) << result.Failure().reason << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  bool left = true;
  bool right = false;
  uint v = uint(left);
  bool val = bool((v )" + params.result +
                                R"( uint(right)));
}
)");
}

TEST_P(GlslWriterBinaryBitwiseBoolTest, EmitVec) {
    auto params = GetParam();

    auto* func = b.ComputeFunction("main");
    b.Append(func->Block(), [&] {
        auto* l = b.Let("left", b.Splat(ty.vec2<bool>(), true));
        auto* r = b.Let("right", b.Splat(ty.vec2<bool>(), false));
        auto* bin = b.Binary(params.op, ty.vec2<bool>(), l, r);
        b.Let("val", bin);
        b.Return(func);
    });

    auto result = Generate();
    ASSERT_EQ(result, Success) << result.Failure().reason << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  bvec2 left = bvec2(true);
  bvec2 right = bvec2(false);
  uvec2 v = uvec2(left);
  bvec2 val = bvec2((v )" + params.result +
                                R"( uvec2(right)));
}
)");
}
INSTANTIATE_TEST_SUITE_P(GlslWriterTest,
                         GlslWriterBinaryBitwiseBoolTest,
                         testing::Values(BinaryData{"&", core::BinaryOp::kAnd},
                                         BinaryData{"|", core::BinaryOp::kOr}));

using GlslWriterBinaryRelationalVecTest = GlslWriterTestWithParam<BinaryData>;
TEST_P(GlslWriterBinaryRelationalVecTest, Emit) {
    auto params = GetParam();

    auto* func = b.ComputeFunction("main");
    b.Append(func->Block(), [&] {
        auto* l = b.Let("left", b.Splat(ty.vec2f(), 1_f));
        auto* r = b.Let("right", b.Splat(ty.vec2f(), 2_f));
        auto* bin = b.Binary(params.op, ty.vec2<bool>(), l, r);
        b.Let("val", bin);
        b.Return(func);
    });

    auto result = Generate();
    ASSERT_EQ(result, Success) << result.Failure().reason << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  vec2 left = vec2(1.0f);
  vec2 right = vec2(2.0f);
  bvec2 val = )" + params.result +
                                R"((left, right);
}
)");
}
INSTANTIATE_TEST_SUITE_P(
    GlslWriterTest,
    GlslWriterBinaryRelationalVecTest,
    testing::Values(BinaryData{"equal", core::BinaryOp::kEqual},
                    BinaryData{"notEqual", core::BinaryOp::kNotEqual},
                    BinaryData{"lessThan", core::BinaryOp::kLessThan},
                    BinaryData{"lessThanEqual", core::BinaryOp::kLessThanEqual},
                    BinaryData{"greaterThan", core::BinaryOp::kGreaterThan},
                    BinaryData{"greaterThanEqual", core::BinaryOp::kGreaterThanEqual}));

TEST_F(GlslWriterTest, Binary_Float_Modulo) {
    auto* func = b.ComputeFunction("main");
    b.Append(func->Block(), [&] {
        auto* l = b.Let("left", b.Splat(ty.vec2f(), 1_f));
        auto* r = b.Let("right", b.Splat(ty.vec2f(), 2_f));
        auto* bin = b.Modulo(l, r);
        b.Let("val", bin);
        b.Return(func);
    });

    auto result = Generate();
    ASSERT_EQ(result, Success) << result.Failure().reason << output_.glsl;
    EXPECT_EQ(output_.glsl, GlslHeader() + R"(
vec2 tint_float_modulo(vec2 x, vec2 y) {
  return (x - (y * trunc((x / y))));
}
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
  vec2 left = vec2(1.0f);
  vec2 right = vec2(2.0f);
  vec2 val = tint_float_modulo(left, right);
}
)");
}

}  // namespace
}  // namespace tint::glsl::writer