// 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/struct.h"

#include <memory>
#include <sstream>
#include <utility>

#include "gtest/gtest.h"
#include "src/ast/struct_decoration.h"
#include "src/ast/struct_member.h"
#include "src/ast/type/i32_type.h"

namespace tint {
namespace ast {
namespace {

using StructTest = testing::Test;

TEST_F(StructTest, Creation) {
  type::I32Type i32;
  StructMemberList members;
  members.push_back(
      std::make_unique<StructMember>("a", &i32, StructMemberDecorationList()));

  Struct s{std::move(members)};
  EXPECT_EQ(s.members().size(), 1u);
  EXPECT_TRUE(s.decorations().empty());
  EXPECT_EQ(s.source().range.begin.line, 0u);
  EXPECT_EQ(s.source().range.begin.column, 0u);
  EXPECT_EQ(s.source().range.end.line, 0u);
  EXPECT_EQ(s.source().range.end.column, 0u);
}

TEST_F(StructTest, Creation_WithDecorations) {
  type::I32Type i32;

  StructMemberList members;
  members.push_back(
      std::make_unique<StructMember>("a", &i32, StructMemberDecorationList()));

  StructDecorationList decos;
  decos.push_back(StructDecoration::kBlock);

  Struct s{std::move(decos), std::move(members)};
  EXPECT_EQ(s.members().size(), 1u);
  ASSERT_EQ(s.decorations().size(), 1u);
  EXPECT_EQ(s.decorations()[0], StructDecoration::kBlock);
  EXPECT_EQ(s.source().range.begin.line, 0u);
  EXPECT_EQ(s.source().range.begin.column, 0u);
  EXPECT_EQ(s.source().range.end.line, 0u);
  EXPECT_EQ(s.source().range.end.column, 0u);
}

TEST_F(StructTest, CreationWithSourceAndDecorations) {
  type::I32Type i32;

  StructMemberList members;
  members.emplace_back(
      std::make_unique<StructMember>("a", &i32, StructMemberDecorationList()));

  StructDecorationList decos;
  decos.push_back(StructDecoration::kBlock);

  Struct s{
      Source{Source::Range{Source::Location{27, 4}, Source::Location{27, 8}}},
      std::move(decos), std::move(members)};
  EXPECT_EQ(s.members().size(), 1u);
  ASSERT_EQ(s.decorations().size(), 1u);
  EXPECT_EQ(s.decorations()[0], StructDecoration::kBlock);
  EXPECT_EQ(s.source().range.begin.line, 27u);
  EXPECT_EQ(s.source().range.begin.column, 4u);
  EXPECT_EQ(s.source().range.end.line, 27u);
  EXPECT_EQ(s.source().range.end.column, 8u);
}

TEST_F(StructTest, IsValid) {
  Struct s;
  EXPECT_TRUE(s.IsValid());
}

TEST_F(StructTest, IsValid_Null_StructMember) {
  type::I32Type i32;

  StructMemberList members;
  members.push_back(
      std::make_unique<StructMember>("a", &i32, StructMemberDecorationList()));
  members.push_back(nullptr);

  Struct s{std::move(members)};
  EXPECT_FALSE(s.IsValid());
}

TEST_F(StructTest, IsValid_Invalid_StructMember) {
  type::I32Type i32;

  StructMemberList members;
  members.push_back(
      std::make_unique<StructMember>("", &i32, StructMemberDecorationList()));

  Struct s{std::move(members)};
  EXPECT_FALSE(s.IsValid());
}

TEST_F(StructTest, IsValid_NoneDecoration) {
  type::I32Type i32;

  StructMemberList members;
  members.push_back(
      std::make_unique<StructMember>("a", &i32, StructMemberDecorationList()));

  StructDecorationList decos;
  decos.push_back(StructDecoration::kNone);

  Struct s{std::move(decos), std::move(members)};
  EXPECT_FALSE(s.IsValid());
}

TEST_F(StructTest, ToStr) {
  type::I32Type i32;

  StructMemberList members;
  members.emplace_back(
      std::make_unique<StructMember>("a", &i32, StructMemberDecorationList()));

  StructDecorationList decos;
  decos.push_back(StructDecoration::kBlock);

  Struct s{std::move(decos), std::move(members)};

  std::ostringstream out;
  s.to_str(out, 2);
  EXPECT_EQ(out.str(), R"(Struct{
    [[block]]
    StructMember{a: __i32}
  }
)");
}

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