/*******************************************************************************
 * This file is part of the "https://github.com/blackmatov/meta.hpp"
 * For conditions of distribution and use, see copyright notice in LICENSE.md
 * Copyright (C) 2021-2022, by Matvey Cherevko (blackmatov@gmail.com)
 ******************************************************************************/

#include "../meta_untests.hpp"

namespace
{
    enum class color {
        red,
        green,
        blue,
    };

    struct ivec2 {
        int x{};
        int y{};
    };

    struct ivec3 {
        int x{};
        int y{};
        int z{};
    };

    ivec2 iadd2(const ivec2& l, const ivec2& r) noexcept {
        return {l.x + r.x, l.y + r.y};
    }

    ivec3 iadd3(const ivec3& l, const ivec3& r) noexcept {
        return {l.x + r.x, l.y + r.y, l.z + r.z};
    }

    ivec2 static_ivec2 = ivec2{1, 0};
    const ivec3 static_const_ivec3 = ivec3{1, 0};
}

TEST_CASE("meta/meta_states/scope") {
    namespace meta = meta_hpp;

    meta::static_scope_("meta/meta_states/scope/math")
        .typedef_<color>("color")
        .typedef_<ivec2>("ivec2")
        .typedef_<ivec3>("ivec3")
        .function_("iadd2", &iadd2, {"l", "r"})
        .function_("iadd3", &iadd3, {"l"})
        .variable_("static_ivec2", &static_ivec2)
        .variable_("static_const_ivec3", &static_const_ivec3);

    const meta::scope math_scope = meta::resolve_scope("meta/meta_states/scope/math");
    REQUIRE(math_scope);
    REQUIRE(math_scope.is_valid());

    CHECK(math_scope.get_name() == "meta/meta_states/scope/math");
    CHECK(math_scope.get_variables().size() == 2);
    CHECK(math_scope.get_typedefs().size() == 3);

    SUBCASE("") {
        const meta::scope scope;
        CHECK_FALSE(scope);
        CHECK_FALSE(scope.is_valid());
    }

    SUBCASE("operators") {
        const meta::scope math1_s = meta::resolve_scope("meta/meta_states/scope/math1");
        const meta::scope math2_s = meta::resolve_scope("meta/meta_states/scope/math2");
        CHECK(math1_s == math1_s);
        CHECK(math1_s != math2_s);
        CHECK((math1_s < math2_s || math2_s < math1_s));
    }

    SUBCASE("classes") {
        CHECK_FALSE(math_scope.get_typedef("non-existent-class"));

        const meta::any_type ivec2_type = math_scope.get_typedef("ivec2");
        CHECK(ivec2_type == meta::resolve_type<ivec2>());

        const meta::any_type ivec3_type = math_scope.get_typedef("ivec3");
        CHECK(ivec3_type == meta::resolve_type<ivec3>());
    }

    SUBCASE("enums") {
        CHECK_FALSE(math_scope.get_typedef("non-existent-enum"));

        const meta::any_type color_type = math_scope.get_typedef("color");
        CHECK(color_type == meta::resolve_type<color>());
    }

    SUBCASE("functions") {
        CHECK_FALSE(math_scope.get_function("non-existent-function"));

        const meta::function iadd2_func = math_scope.get_function("iadd2");
        REQUIRE(iadd2_func);

        {
            CHECK(iadd2_func.get_arguments().size() == 2);

            REQUIRE(iadd2_func.get_argument(0));
            CHECK(iadd2_func.get_argument(0).get_type() == meta::resolve_type<const ivec2&>());
            CHECK(iadd2_func.get_argument(0).get_position() == 0);
            CHECK(iadd2_func.get_argument(0).get_name() == "l");

            REQUIRE(iadd2_func.get_argument(1));
            CHECK(iadd2_func.get_argument(1).get_type() == meta::resolve_type<const ivec2&>());
            CHECK(iadd2_func.get_argument(1).get_position() == 1);
            CHECK(iadd2_func.get_argument(1).get_name() == "r");

            CHECK_FALSE(iadd2_func.get_argument(2));
        }

        const meta::function iadd3_func = math_scope.get_function("iadd3");
        REQUIRE(iadd3_func);

        {
            CHECK(iadd3_func.get_arguments().size() == 2);

            REQUIRE(iadd3_func.get_argument(0));
            CHECK(iadd3_func.get_argument(0).get_type() == meta::resolve_type<const ivec3&>());
            CHECK(iadd3_func.get_argument(0).get_position() == 0);
            CHECK(iadd3_func.get_argument(0).get_name() == "l");

            REQUIRE(iadd3_func.get_argument(1));
            CHECK(iadd3_func.get_argument(1).get_type() == meta::resolve_type<const ivec3&>());
            CHECK(iadd3_func.get_argument(1).get_position() == 1);
            CHECK(iadd3_func.get_argument(1).get_name() == "");

            CHECK_FALSE(iadd3_func.get_argument(2));
        }
    }

    SUBCASE("variables") {
        CHECK_FALSE(math_scope.get_variable("non-existent-variable"));

        const meta::variable static_ivec2_var = math_scope.get_variable("static_ivec2");
        REQUIRE(static_ivec2_var);
        CHECK(static_ivec2_var.get_type().get_data_type() == meta::resolve_type<ivec2>());

        const meta::variable static_const_ivec3_var = math_scope.get_variable("static_const_ivec3");
        REQUIRE(static_const_ivec3_var);
        CHECK(static_const_ivec3_var.get_type().get_data_type() == meta::resolve_type<ivec3>());
    }
}