// Copyright 2020 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 "src/tint/reader/wgsl/parser_impl_test_helper.h"
#include "src/tint/type/depth_texture.h"
#include "src/tint/type/multisampled_texture.h"
#include "src/tint/type/sampled_texture.h"
#include "src/tint/type/texture_dimension.h"

namespace tint::reader::wgsl {
namespace {

TEST_F(ParserImplTest, TextureSamplerTypes_Invalid) {
    auto p = parser("1234");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_FALSE(t.errored);
    EXPECT_FALSE(p->has_error());
}

TEST_F(ParserImplTest, TextureSamplerTypes_Sampler) {
    auto p = parser("sampler");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);
    ASSERT_TRUE(t->Is<ast::Sampler>());
    ASSERT_FALSE(t->As<ast::Sampler>()->IsComparison());
    EXPECT_EQ(t.value->source.range, (Source::Range{{1u, 1u}, {1u, 8u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_SamplerComparison) {
    auto p = parser("sampler_comparison");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);
    ASSERT_TRUE(t->Is<ast::Sampler>());
    ASSERT_TRUE(t->As<ast::Sampler>()->IsComparison());
    EXPECT_EQ(t.value->source.range, (Source::Range{{1u, 1u}, {1u, 19u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_DepthTexture) {
    auto p = parser("texture_depth_2d");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);
    ASSERT_TRUE(t->Is<ast::Texture>());
    ASSERT_TRUE(t->Is<ast::DepthTexture>());
    EXPECT_EQ(t->As<ast::Texture>()->dim, type::TextureDimension::k2d);
    EXPECT_EQ(t.value->source.range, (Source::Range{{1u, 1u}, {1u, 17u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_SampledTexture_F32) {
    auto p = parser("texture_1d<f32>");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);
    ASSERT_TRUE(t->Is<ast::Texture>());
    ASSERT_TRUE(t->Is<ast::SampledTexture>());
    ASSERT_TRUE(t->As<ast::SampledTexture>()->type->Is<ast::F32>());
    EXPECT_EQ(t->As<ast::Texture>()->dim, type::TextureDimension::k1d);
    EXPECT_EQ(t.value->source.range, (Source::Range{{1u, 1u}, {1u, 16u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_SampledTexture_I32) {
    auto p = parser("texture_2d<i32>");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);
    ASSERT_TRUE(t->Is<ast::Texture>());
    ASSERT_TRUE(t->Is<ast::SampledTexture>());
    ASSERT_TRUE(t->As<ast::SampledTexture>()->type->Is<ast::I32>());
    EXPECT_EQ(t->As<ast::Texture>()->dim, type::TextureDimension::k2d);
    EXPECT_EQ(t.value->source.range, (Source::Range{{1u, 1u}, {1u, 16u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_SampledTexture_U32) {
    auto p = parser("texture_3d<u32>");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);
    ASSERT_TRUE(t->Is<ast::Texture>());
    ASSERT_TRUE(t->Is<ast::SampledTexture>());
    ASSERT_TRUE(t->As<ast::SampledTexture>()->type->Is<ast::U32>());
    EXPECT_EQ(t->As<ast::Texture>()->dim, type::TextureDimension::k3d);
    EXPECT_EQ(t.value->source.range, (Source::Range{{1u, 1u}, {1u, 16u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_SampledTexture_MissingType) {
    auto p = parser("texture_1d<>");
    auto t = p->texture_and_sampler_types();
    ASSERT_TRUE(p->has_error());
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:12: invalid type for sampled texture type");
}

TEST_F(ParserImplTest, TextureSamplerTypes_SampledTexture_MissingLessThan) {
    auto p = parser("texture_1d");
    auto t = p->texture_and_sampler_types();
    ASSERT_TRUE(p->has_error());
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:11: expected '<' for sampled texture type");
}

TEST_F(ParserImplTest, TextureSamplerTypes_SampledTexture_MissingGreaterThan) {
    auto p = parser("texture_1d<u32");
    auto t = p->texture_and_sampler_types();
    ASSERT_TRUE(p->has_error());
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:15: expected '>' for sampled texture type");
}

TEST_F(ParserImplTest, TextureSamplerTypes_MultisampledTexture_I32) {
    auto p = parser("texture_multisampled_2d<i32>");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);
    ASSERT_TRUE(t->Is<ast::Texture>());
    ASSERT_TRUE(t->Is<ast::MultisampledTexture>());
    ASSERT_TRUE(t->As<ast::MultisampledTexture>()->type->Is<ast::I32>());
    EXPECT_EQ(t->As<ast::Texture>()->dim, type::TextureDimension::k2d);
    EXPECT_EQ(t.value->source.range, (Source::Range{{1u, 1u}, {1u, 29u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_MultisampledTexture_MissingType) {
    auto p = parser("texture_multisampled_2d<>");
    auto t = p->texture_and_sampler_types();
    ASSERT_TRUE(p->has_error());
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:25: invalid type for multisampled texture type");
}

TEST_F(ParserImplTest, TextureSamplerTypes_MultisampledTexture_MissingLessThan) {
    auto p = parser("texture_multisampled_2d");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:24: expected '<' for multisampled texture type");
}

TEST_F(ParserImplTest, TextureSamplerTypes_MultisampledTexture_MissingGreaterThan) {
    auto p = parser("texture_multisampled_2d<u32");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:28: expected '>' for multisampled texture type");
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_Readonly1dRg32Float) {
    auto p = parser("texture_storage_1d<rg32float, read>");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);

    ASSERT_TRUE(t->Is<ast::Texture>());
    ASSERT_TRUE(t->Is<ast::StorageTexture>());
    EXPECT_EQ(t->As<ast::StorageTexture>()->format, type::TexelFormat::kRg32Float);
    EXPECT_EQ(t->As<ast::StorageTexture>()->access, type::Access::kRead);
    EXPECT_EQ(t->As<ast::Texture>()->dim, type::TextureDimension::k1d);
    EXPECT_EQ(t->source.range, (Source::Range{{1u, 1u}, {1u, 36u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_Writeonly2dR32Uint) {
    auto p = parser("texture_storage_2d<r32uint, write>");
    auto t = p->texture_and_sampler_types();
    ASSERT_FALSE(p->has_error()) << p->error();
    EXPECT_TRUE(t.matched);
    EXPECT_FALSE(t.errored);
    ASSERT_NE(t.value, nullptr);

    ASSERT_TRUE(t->Is<ast::Texture>());
    ASSERT_TRUE(t->Is<ast::StorageTexture>());
    EXPECT_EQ(t->As<ast::StorageTexture>()->format, type::TexelFormat::kR32Uint);
    EXPECT_EQ(t->As<ast::StorageTexture>()->access, type::Access::kWrite);
    EXPECT_EQ(t->As<ast::Texture>()->dim, type::TextureDimension::k2d);
    EXPECT_EQ(t->source.range, (Source::Range{{1u, 1u}, {1u, 35u}}));
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_InvalidType) {
    auto p = parser("texture_storage_1d<abc, read>");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), R"(1:20: expected texel format for storage texture type
Possible values: 'bgra8unorm', 'r32float', 'r32sint', 'r32uint', 'rg32float', 'rg32sint', 'rg32uint', 'rgba16float', 'rgba16sint', 'rgba16uint', 'rgba32float', 'rgba32sint', 'rgba32uint', 'rgba8sint', 'rgba8snorm', 'rgba8uint', 'rgba8unorm')");
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_InvalidTypeSuggest) {
    auto p = parser("texture_storage_1d<rg32_float, read>");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(),
              R"(1:20: expected texel format for storage texture type. Did you mean 'rg32float'?
Possible values: 'bgra8unorm', 'r32float', 'r32sint', 'r32uint', 'rg32float', 'rg32sint', 'rg32uint', 'rgba16float', 'rgba16sint', 'rgba16uint', 'rgba32float', 'rgba32sint', 'rgba32uint', 'rgba8sint', 'rgba8snorm', 'rgba8uint', 'rgba8unorm')");
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_InvalidAccess) {
    auto p = parser("texture_storage_1d<r32float, abc>");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(),
              R"(1:30: expected access control for storage texture type. Did you mean 'read'?
Possible values: 'read', 'read_write', 'write')");
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_MissingType) {
    auto p = parser("texture_storage_1d<>");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), R"(1:20: expected texel format for storage texture type
Possible values: 'bgra8unorm', 'r32float', 'r32sint', 'r32uint', 'rg32float', 'rg32sint', 'rg32uint', 'rgba16float', 'rgba16sint', 'rgba16uint', 'rgba32float', 'rgba32sint', 'rgba32uint', 'rgba8sint', 'rgba8snorm', 'rgba8uint', 'rgba8unorm')");
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_MissingLessThan) {
    auto p = parser("texture_storage_1d");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:19: expected '<' for storage texture type");
}

TEST_F(ParserImplTest, TextureSamplerTypes_StorageTexture_MissingGreaterThan) {
    auto p = parser("texture_storage_1d<r32uint, read");
    auto t = p->texture_and_sampler_types();
    EXPECT_EQ(t.value, nullptr);
    EXPECT_FALSE(t.matched);
    EXPECT_TRUE(t.errored);
    EXPECT_EQ(p->error(), "1:33: expected '>' for storage texture type");
}

}  // namespace
}  // namespace tint::reader::wgsl