// Copyright 2023 The Dawn & Tint Authors
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#include "src/tint/lang/glsl/writer/ast_raise/texture_builtins_from_uniform.h"

#include <utility>

#include "src/tint/lang/wgsl/ast/transform/helper_test.h"

namespace tint::glsl::writer {
namespace {

using TextureBuiltinsFromUniformTest = ast::transform::TransformTest;

TEST_F(TextureBuiltinsFromUniformTest, Error_MissingTransformData) {
    auto* src = R"(
@group(0) @binding(0) var t : texture_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = textureNumLevels(t);
}
)";

    auto* expect =
        "error: missing transform data for tint::glsl::writer::TextureBuiltinsFromUniform";

    auto got = Run<TextureBuiltinsFromUniform>(src);

    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, BasicTextureNumLevels) {
    auto* src = R"(
@group(0) @binding(0) var t : texture_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = textureNumLevels(t);
}
)";

    auto* expect = R"(
struct tint_symbol {
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_1 : tint_symbol;

@group(0) @binding(0) var t : texture_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = tint_symbol_1.texture_builtin_value_0;
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, BasicTextureNumSamples) {
    auto* src = R"(
@group(0) @binding(0) var t : texture_multisampled_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var samples : u32 = textureNumSamples(t);
}
)";

    auto* expect = R"(
struct tint_symbol {
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_1 : tint_symbol;

@group(0) @binding(0) var t : texture_multisampled_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var samples : u32 = tint_symbol_1.texture_builtin_value_0;
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, SameBuiltinCalledMultipleTimes) {
    auto* src = R"(
@group(0) @binding(0) var tex : texture_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = textureNumLevels(tex);
  len = textureNumLevels(tex);
}
)";

    auto* expect = R"(
struct tint_symbol {
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_1 : tint_symbol;

@group(0) @binding(0) var tex : texture_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = tint_symbol_1.texture_builtin_value_0;
  len = tint_symbol_1.texture_builtin_value_0;
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, SameBuiltinCalledMultipleTimesTextureNumSamples) {
    auto* src = R"(
@group(0) @binding(0) var tex : texture_multisampled_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = textureNumSamples(tex);
  len = textureNumSamples(tex);
}
)";

    auto* expect = R"(
struct tint_symbol {
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_1 : tint_symbol;

@group(0) @binding(0) var tex : texture_multisampled_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = tint_symbol_1.texture_builtin_value_0;
  len = tint_symbol_1.texture_builtin_value_0;
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, TextureAsFunctionParameterBasic) {
    auto* src = R"(
@group(0) @binding(0) var tex : texture_2d<f32>;

fn f(t: texture_2d<f32>) -> u32 {
  return textureNumLevels(t);
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f(tex);
}
)";

    auto* expect = R"(
struct tint_symbol_1 {
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_2 : tint_symbol_1;

@group(0) @binding(0) var tex : texture_2d<f32>;

fn f(t : texture_2d<f32>, tint_symbol : u32) -> u32 {
  return tint_symbol;
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f(tex, tint_symbol_2.texture_builtin_value_0);
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, TextureAsFunctionParameterUsedTwice) {
    auto* src = R"(
@group(0) @binding(0) var tex : texture_2d<f32>;

fn f(t: texture_2d<f32>) -> u32 {
  var len = textureNumLevels(t);
  len += textureNumLevels(t);
  return len;
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f(tex);
}
)";

    auto* expect = R"(
struct tint_symbol_1 {
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_2 : tint_symbol_1;

@group(0) @binding(0) var tex : texture_2d<f32>;

fn f(t : texture_2d<f32>, tint_symbol : u32) -> u32 {
  var len = tint_symbol;
  len += tint_symbol;
  return len;
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f(tex, tint_symbol_2.texture_builtin_value_0);
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, TextureAsFunctionParameterMultipleParameters) {
    auto* src = R"(
@group(0) @binding(0) var tex1 : texture_2d<f32>;
@group(0) @binding(1) var tex2 : texture_2d<f32>;
@group(0) @binding(2) var tex3 : texture_2d<f32>;

fn f(t1: texture_2d<f32>, t2: texture_2d<f32>, t3: texture_2d<f32>) -> u32 {
  return textureNumLevels(t1) + textureNumLevels(t2) + textureNumLevels(t3);
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f(tex1, tex2, tex3);
}
)";

    auto* expect = R"(
struct tint_symbol_3 {
  texture_builtin_value_0 : u32,
  texture_builtin_value_1 : u32,
  texture_builtin_value_2 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_4 : tint_symbol_3;

@group(0) @binding(0) var tex1 : texture_2d<f32>;

@group(0) @binding(1) var tex2 : texture_2d<f32>;

@group(0) @binding(2) var tex3 : texture_2d<f32>;

fn f(t1 : texture_2d<f32>, t2 : texture_2d<f32>, t3 : texture_2d<f32>, tint_symbol : u32, tint_symbol_1 : u32, tint_symbol_2 : u32) -> u32 {
  return ((tint_symbol + tint_symbol_1) + tint_symbol_2);
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f(tex1, tex2, tex3, tint_symbol_4.texture_builtin_value_0, tint_symbol_4.texture_builtin_value_1, tint_symbol_4.texture_builtin_value_2);
}
)";

    std::vector<BindingPoint> bps = {{0, 0}, {0, 1}, {0, 2}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, TextureAsFunctionParameterNested) {
    auto* src = R"(
@group(0) @binding(0) var tex : texture_2d<f32>;

fn f2(tt: texture_2d<f32>) -> u32 {
  return textureNumLevels(tt);
}

fn f1(t: texture_2d<f32>) -> u32 {
  return f2(t);
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f1(tex);
}
)";

    auto* expect = R"(
struct tint_symbol_2 {
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_3 : tint_symbol_2;

@group(0) @binding(0) var tex : texture_2d<f32>;

fn f2(tt : texture_2d<f32>, tint_symbol : u32) -> u32 {
  return tint_symbol;
}

fn f1(t : texture_2d<f32>, tint_symbol_1 : u32) -> u32 {
  return f2(t, tint_symbol_1);
}

@compute @workgroup_size(1)
fn main() {
  var len : u32 = f1(tex, tint_symbol_3.texture_builtin_value_0);
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, TextureAsFunctionParameterMixed) {
    auto* src = R"(
@group(0) @binding(0) var tex0 : texture_2d<f32>;
@group(0) @binding(1) var tex1 : texture_2d<f32>;
@group(0) @binding(2) var tex2 : texture_2d<f32>;
@group(0) @binding(3) var tex3 : texture_2d<f32>;
@group(0) @binding(4) var tex4 : texture_2d_array<f32>; // unused for textureNumLevels

fn f_nested(t1: texture_2d<f32>, t2: texture_2d<f32>) -> u32 {
  return textureNumLevels(t1) + textureNumLevels(t2);
}

fn f1(a: u32, t: texture_2d<f32>) -> u32 {
  return a + f_nested(t, tex1) + textureNumLevels(tex3);
}

@compute @workgroup_size(1)
fn main() {
  _ = textureNumLayers(tex4);
  _ = f1(9u, tex0);
  _ = f_nested(tex2, tex2);
  _ = f_nested(tex1, tex0);
}
)";

    auto* expect = R"(
struct tint_symbol_3 {
  texture_builtin_value_0 : u32,
  texture_builtin_value_1 : u32,
  texture_builtin_value_2 : u32,
  texture_builtin_value_3 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_4 : tint_symbol_3;

@group(0) @binding(0) var tex0 : texture_2d<f32>;

@group(0) @binding(1) var tex1 : texture_2d<f32>;

@group(0) @binding(2) var tex2 : texture_2d<f32>;

@group(0) @binding(3) var tex3 : texture_2d<f32>;

@group(0) @binding(4) var tex4 : texture_2d_array<f32>;

fn f_nested(t1 : texture_2d<f32>, t2 : texture_2d<f32>, tint_symbol : u32, tint_symbol_1 : u32) -> u32 {
  return (tint_symbol + tint_symbol_1);
}

fn f1(a : u32, t : texture_2d<f32>, tint_symbol_2 : u32) -> u32 {
  return ((a + f_nested(t, tex1, tint_symbol_2, tint_symbol_4.texture_builtin_value_0)) + tint_symbol_4.texture_builtin_value_1);
}

@compute @workgroup_size(1)
fn main() {
  _ = textureNumLayers(tex4);
  _ = f1(9u, tex0, tint_symbol_4.texture_builtin_value_2);
  _ = f_nested(tex2, tex2, tint_symbol_4.texture_builtin_value_3, tint_symbol_4.texture_builtin_value_3);
  _ = f_nested(tex1, tex0, tint_symbol_4.texture_builtin_value_0, tint_symbol_4.texture_builtin_value_2);
}
)";

    std::vector<BindingPoint> bps = {{0, 1}, {0, 3}, {0, 0}, {0, 2}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);
    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, MultipleTextures) {
    auto* src = R"(
@group(0) @binding(0) var t0 : texture_2d<f32>;
@group(0) @binding(1) var t1 : texture_multisampled_2d<f32>;
@group(0) @binding(2) var t2 : texture_2d_array<f32>;
@group(0) @binding(3) var t3 : texture_cube<f32>;
@group(0) @binding(4) var t4 : texture_depth_2d;
@group(1) @binding(0) var t5 : texture_depth_multisampled_2d;

@compute @workgroup_size(1)
fn main() {
  _ = textureNumLevels(t0);
  _ = textureNumSamples(t1);
  _ = textureNumLevels(t2);
  _ = textureNumLevels(t3);
  _ = textureNumLevels(t4);
  _ = textureNumSamples(t5);
}
)";

    auto* expect = R"(
struct tint_symbol {
  texture_builtin_value_0 : u32,
  texture_builtin_value_1 : u32,
  texture_builtin_value_2 : u32,
  texture_builtin_value_3 : u32,
  texture_builtin_value_4 : u32,
  texture_builtin_value_5 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_1 : tint_symbol;

@group(0) @binding(0) var t0 : texture_2d<f32>;

@group(0) @binding(1) var t1 : texture_multisampled_2d<f32>;

@group(0) @binding(2) var t2 : texture_2d_array<f32>;

@group(0) @binding(3) var t3 : texture_cube<f32>;

@group(0) @binding(4) var t4 : texture_depth_2d;

@group(1) @binding(0) var t5 : texture_depth_multisampled_2d;

@compute @workgroup_size(1)
fn main() {
  _ = tint_symbol_1.texture_builtin_value_0;
  _ = tint_symbol_1.texture_builtin_value_1;
  _ = tint_symbol_1.texture_builtin_value_2;
  _ = tint_symbol_1.texture_builtin_value_3;
  _ = tint_symbol_1.texture_builtin_value_4;
  _ = tint_symbol_1.texture_builtin_value_5;
}
)";

    std::vector<BindingPoint> bps = {{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}, {1, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);

    EXPECT_EQ(expect, str(got));
}

TEST_F(TextureBuiltinsFromUniformTest, BindingPointExist) {
    auto* src = R"(
struct tint_symbol {
  foo : array<vec4<u32>, 1u>,
}

@group(0) @binding(30) var<uniform> tint_symbol_1 : tint_symbol;

@group(0) @binding(0) var t : texture_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = textureNumLevels(t);
}
)";

    auto* expect = R"(
struct tint_symbol {
  foo : array<vec4<u32>, 1u>,
  texture_builtin_value_0 : u32,
}

@group(0) @binding(30) var<uniform> tint_symbol_1 : tint_symbol;

@group(0) @binding(0) var t : texture_2d<f32>;

@compute @workgroup_size(1)
fn main() {
  var len : u32 = tint_symbol_1.texture_builtin_value_0;
}
)";

    std::vector<BindingPoint> bps = {{0, 0}};
    TextureBuiltinsFromUniform::Config cfg({0, 30u}, bps);

    ast::transform::DataMap data;
    data.Add<TextureBuiltinsFromUniform::Config>(std::move(cfg));

    auto got = Run<TextureBuiltinsFromUniform>(src, data);

    EXPECT_EQ(expect, str(got));
}

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