// Copyright 2022 The Dawn & Tint Authors
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#include "src/tint/lang/core/type/manager.h"

#include "gtest/gtest.h"
#include "src/tint/lang/core/type/array.h"
#include "src/tint/lang/core/type/bool.h"
#include "src/tint/lang/core/type/f16.h"
#include "src/tint/lang/core/type/f32.h"
#include "src/tint/lang/core/type/i32.h"
#include "src/tint/lang/core/type/matrix.h"
#include "src/tint/lang/core/type/u32.h"

namespace tint::core::type {
namespace {

using namespace tint::core::fluent_types;  // NOLINT

template <typename T>
size_t count(const T& range_loopable) {
    size_t n = 0;
    for (auto it : range_loopable) {
        (void)it;
        n++;
    }
    return n;
}

using ManagerTest = testing::Test;

TEST_F(ManagerTest, GetUnregistered) {
    Manager tm;
    auto* t = tm.Get<I32>();
    ASSERT_NE(t, nullptr);
    EXPECT_TRUE(t->Is<I32>());
}

TEST_F(ManagerTest, GetSameTypeReturnsSamePtr) {
    Manager tm;
    auto* t = tm.Get<I32>();
    ASSERT_NE(t, nullptr);
    EXPECT_TRUE(t->Is<I32>());

    auto* t2 = tm.Get<I32>();
    EXPECT_EQ(t, t2);
}

TEST_F(ManagerTest, GetDifferentTypeReturnsDifferentPtr) {
    Manager tm;
    Type* t = tm.Get<I32>();
    ASSERT_NE(t, nullptr);
    EXPECT_TRUE(t->Is<I32>());

    Type* t2 = tm.Get<U32>();
    ASSERT_NE(t2, nullptr);
    EXPECT_NE(t, t2);
    EXPECT_TRUE(t2->Is<U32>());
}

TEST_F(ManagerTest, CppToType) {
    Manager tm;
    const Type* b1 = tm.Get<bool>();
    const Type* b2 = tm.Get<Bool>();
    ASSERT_EQ(b1, b2);

    const Type* i1 = tm.Get<i32>();
    const Type* i2 = tm.Get<I32>();
    ASSERT_EQ(i1, i2);

    const Type* u1 = tm.Get<u32>();
    const Type* u2 = tm.Get<U32>();
    ASSERT_EQ(u1, u2);

    const Type* f1 = tm.Get<f32>();
    const Type* f2 = tm.Get<F32>();
    ASSERT_EQ(f1, f2);

    const Type* h1 = tm.Get<f16>();
    const Type* h2 = tm.Get<F16>();
    ASSERT_EQ(h1, h2);
}

TEST_F(ManagerTest, Find) {
    Manager tm;
    auto* created = tm.Get<I32>();

    EXPECT_EQ(tm.Find<U32>(), nullptr);
    EXPECT_EQ(tm.Find<I32>(), created);
}

TEST_F(ManagerTest, WrapDoesntAffectInner) {
    Manager inner;
    Manager outer = Manager::Wrap(inner);

    inner.Get<I32>();

    EXPECT_EQ(count(inner), 1u);
    EXPECT_EQ(count(outer), 0u);

    outer.Get<U32>();

    EXPECT_EQ(count(inner), 1u);
    EXPECT_EQ(count(outer), 1u);
}

TEST_F(ManagerTest, ArrayImplicitStride) {
    Manager tm;
    auto* arr = tm.array<mat4x4<f32>, 4>();
    EXPECT_EQ(arr->Stride(), 64u);
    EXPECT_EQ(arr->ImplicitStride(), 64u);
}

TEST_F(ManagerTest, RuntimeSizedArrayImplicitStride) {
    Manager tm;
    auto* arr = tm.array<mat4x4<f32>>();
    EXPECT_EQ(arr->Stride(), 64u);
    EXPECT_EQ(arr->ImplicitStride(), 64u);
}

}  // namespace
}  // namespace tint::core::type