// 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/ast/type/storage_texture_type.h"

#include <memory>

#include "src/ast/identifier_expression.h"
#include "src/ast/test_helper.h"
#include "src/ast/type/access_control_type.h"
#include "src/ast/type/array_type.h"
#include "src/ast/type/bool_type.h"
#include "src/ast/type/depth_texture_type.h"
#include "src/ast/type/f32_type.h"
#include "src/ast/type/i32_type.h"
#include "src/ast/type/matrix_type.h"
#include "src/ast/type/pointer_type.h"
#include "src/ast/type/sampled_texture_type.h"
#include "src/ast/type/struct_type.h"
#include "src/ast/type/u32_type.h"
#include "src/ast/type/vector_type.h"
#include "src/type_determiner.h"

namespace tint {
namespace ast {
namespace type {
namespace {

using StorageTextureTypeTest = TestHelper;

TEST_F(StorageTextureTypeTest, Is) {
  StorageTextureType s(TextureDimension::k2dArray, AccessControl::kReadOnly,
                       ImageFormat::kRgba32Float);
  Type* ty = &s;
  EXPECT_FALSE(ty->Is<AccessControlType>());
  EXPECT_FALSE(ty->Is<AliasType>());
  EXPECT_FALSE(ty->Is<ArrayType>());
  EXPECT_FALSE(ty->Is<BoolType>());
  EXPECT_FALSE(ty->Is<F32Type>());
  EXPECT_FALSE(ty->Is<I32Type>());
  EXPECT_FALSE(ty->Is<MatrixType>());
  EXPECT_FALSE(ty->Is<PointerType>());
  EXPECT_FALSE(ty->Is<SamplerType>());
  EXPECT_FALSE(ty->Is<StructType>());
  EXPECT_TRUE(ty->Is<TextureType>());
  EXPECT_FALSE(ty->Is<U32Type>());
  EXPECT_FALSE(ty->Is<VectorType>());
}

TEST_F(StorageTextureTypeTest, IsTextureType) {
  StorageTextureType s(TextureDimension::k2dArray, AccessControl::kReadOnly,
                       ImageFormat::kRgba32Float);
  TextureType* ty = &s;
  EXPECT_FALSE(ty->Is<DepthTextureType>());
  EXPECT_FALSE(ty->Is<SampledTextureType>());
  EXPECT_TRUE(ty->Is<StorageTextureType>());
}

TEST_F(StorageTextureTypeTest, Dim) {
  StorageTextureType s(TextureDimension::k2dArray, AccessControl::kReadOnly,
                       ImageFormat::kRgba32Float);
  EXPECT_EQ(s.dim(), TextureDimension::k2dArray);
}

TEST_F(StorageTextureTypeTest, Access) {
  StorageTextureType s(TextureDimension::k2dArray, AccessControl::kReadOnly,
                       ImageFormat::kRgba32Float);
  EXPECT_EQ(s.access(), AccessControl::kReadOnly);
}

TEST_F(StorageTextureTypeTest, Format) {
  StorageTextureType s(TextureDimension::k2dArray, AccessControl::kReadOnly,
                       ImageFormat::kRgba32Float);
  EXPECT_EQ(s.image_format(), ImageFormat::kRgba32Float);
}

TEST_F(StorageTextureTypeTest, TypeName) {
  StorageTextureType s(TextureDimension::k2dArray, AccessControl::kReadOnly,
                       ImageFormat::kRgba32Float);
  EXPECT_EQ(s.type_name(), "__storage_texture_read_only_2d_array_rgba32float");
}

TEST_F(StorageTextureTypeTest, F32Type) {
  Context ctx;
  ast::Module mod;
  Type* s = mod.create<StorageTextureType>(TextureDimension::k2dArray,
                                           AccessControl::kReadOnly,
                                           ImageFormat::kRgba32Float);
  TypeDeterminer td(&ctx, &mod);

  ASSERT_TRUE(td.Determine()) << td.error();
  ASSERT_TRUE(s->Is<TextureType>());
  ASSERT_TRUE(s->Is<StorageTextureType>());
  EXPECT_TRUE(
      s->As<TextureType>()->As<StorageTextureType>()->type()->Is<F32Type>());
}

TEST_F(StorageTextureTypeTest, U32Type) {
  Context ctx;
  ast::Module mod;
  Type* s = mod.create<StorageTextureType>(TextureDimension::k2dArray,
                                           AccessControl::kReadOnly,
                                           ImageFormat::kRg32Uint);
  TypeDeterminer td(&ctx, &mod);

  ASSERT_TRUE(td.Determine()) << td.error();
  ASSERT_TRUE(s->Is<TextureType>());
  ASSERT_TRUE(s->Is<StorageTextureType>());
  EXPECT_TRUE(s->As<StorageTextureType>()->type()->Is<U32Type>());
}

TEST_F(StorageTextureTypeTest, I32Type) {
  Context ctx;
  ast::Module mod;
  Type* s = mod.create<StorageTextureType>(TextureDimension::k2dArray,
                                           AccessControl::kReadOnly,
                                           ImageFormat::kRgba32Sint);
  TypeDeterminer td(&ctx, &mod);

  ASSERT_TRUE(td.Determine()) << td.error();
  ASSERT_TRUE(s->Is<TextureType>());
  ASSERT_TRUE(s->Is<StorageTextureType>());
  EXPECT_TRUE(
      s->As<TextureType>()->As<StorageTextureType>()->type()->Is<I32Type>());
}

TEST_F(StorageTextureTypeTest, MinBufferBindingSize) {
  StorageTextureType s(TextureDimension::k2dArray, AccessControl::kReadOnly,
                       ImageFormat::kRgba32Sint);
  EXPECT_EQ(0u, s.MinBufferBindingSize(MemoryLayout::kUniformBuffer));
}

}  // namespace
}  // namespace type
}  // namespace ast
}  // namespace tint