// 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/lang/wgsl/ast/struct.h"
#include "gtest/gtest-spi.h"
#include "src/tint/lang/wgsl/ast/alias.h"
#include "src/tint/lang/wgsl/ast/test_helper.h"
#include "src/tint/lang/wgsl/ast/transform/add_block_attribute.h"

namespace tint::ast {
namespace {

using AstStructTest = TestHelper;
using BlockAttribute = transform::AddBlockAttribute::BlockAttribute;

TEST_F(AstStructTest, Creation) {
    auto name = Sym("s");
    auto* s = Structure(name, tint::Vector{Member("a", ty.i32())});
    EXPECT_EQ(s->name->symbol, name);
    EXPECT_EQ(s->members.Length(), 1u);
    EXPECT_TRUE(s->attributes.IsEmpty());
    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(AstStructTest, Creation_WithAttributes) {
    auto name = Sym("s");

    auto* s = Structure(name, tint::Vector{Member("a", ty.i32())},
                        tint::Vector{
                            ASTNodes().Create<BlockAttribute>(ID(), AllocateNodeID()),
                        });
    EXPECT_EQ(s->name->symbol, name);
    EXPECT_EQ(s->members.Length(), 1u);
    ASSERT_EQ(s->attributes.Length(), 1u);
    EXPECT_TRUE(s->attributes[0]->Is<BlockAttribute>());
    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(AstStructTest, CreationWithSourceAndAttributes) {
    auto name = Sym("s");
    auto* s = Structure(Source{Source::Range{Source::Location{27, 4}, Source::Location{27, 8}}},
                        name, tint::Vector{Member("a", ty.i32())},
                        tint::Vector{ASTNodes().Create<BlockAttribute>(ID(), AllocateNodeID())});
    EXPECT_EQ(s->name->symbol, name);
    EXPECT_EQ(s->members.Length(), 1u);
    ASSERT_EQ(s->attributes.Length(), 1u);
    EXPECT_TRUE(s->attributes[0]->Is<BlockAttribute>());
    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(AstStructTest, Assert_Null_StructMember) {
    EXPECT_FATAL_FAILURE(
        {
            ProgramBuilder b;
            b.Structure(b.Sym("S"), tint::Vector{b.Member("a", b.ty.i32()), nullptr}, tint::Empty);
        },
        "internal compiler error");
}

TEST_F(AstStructTest, Assert_Null_Attribute) {
    EXPECT_FATAL_FAILURE(
        {
            ProgramBuilder b;
            b.Structure(b.Sym("S"), tint::Vector{b.Member("a", b.ty.i32())},
                        tint::Vector<const Attribute*, 1>{nullptr});
        },
        "internal compiler error");
}

TEST_F(AstStructTest, Assert_DifferentGenerationID_StructMember) {
    EXPECT_FATAL_FAILURE(
        {
            ProgramBuilder b1;
            ProgramBuilder b2;
            b1.Structure(b1.Sym("S"), tint::Vector{b2.Member("a", b2.ty.i32())});
        },
        "internal compiler error");
}

TEST_F(AstStructTest, Assert_DifferentGenerationID_Attribute) {
    EXPECT_FATAL_FAILURE(
        {
            ProgramBuilder b1;
            ProgramBuilder b2;
            b1.Structure(
                b1.Sym("S"), tint::Vector{b1.Member("a", b1.ty.i32())},
                tint::Vector{b2.ASTNodes().Create<BlockAttribute>(b2.ID(), b2.AllocateNodeID())});
        },
        "internal compiler error");
}

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