#include <SFML/Graphics/Font.hpp>

// Other 1st party headers
#include <SFML/System/FileInputStream.hpp>

#include <catch2/catch_test_macros.hpp>

#include <GraphicsUtil.hpp>
#include <fstream>
#include <type_traits>

TEST_CASE("[Graphics] sf::Font", runDisplayTests())
{
    SECTION("Type traits")
    {
        STATIC_CHECK(std::is_copy_constructible_v<sf::Font>);
        STATIC_CHECK(std::is_copy_assignable_v<sf::Font>);
        STATIC_CHECK(std::is_move_constructible_v<sf::Font>);
        STATIC_CHECK(std::is_move_assignable_v<sf::Font>);
    }

    SECTION("Construction")
    {
        const sf::Font font;
        CHECK(font.getInfo().family.empty());
        CHECK(!font.hasGlyph(0));
        CHECK(font.getLineSpacing(0) == 0);
        CHECK(font.getUnderlinePosition(0) == 0);
        CHECK(font.getUnderlineThickness(0) == 0);
        CHECK(font.isSmooth());
    }

    SECTION("loadFromFile()")
    {
        sf::Font font;

        SECTION("Invalid filename")
        {
            CHECK(!font.loadFromFile("does/not/exist.ttf"));
        }

        SECTION("Successful load")
        {
            REQUIRE(font.loadFromFile("Graphics/tuffy.ttf"));
            CHECK(font.getInfo().family == "Tuffy");
            const auto& glyph = font.getGlyph(0x45, 16, false);
            CHECK(glyph.advance == 9);
            CHECK(glyph.lsbDelta == 9);
            CHECK(glyph.rsbDelta == 16);
            CHECK(glyph.bounds == sf::FloatRect({0, -12}, {8, 12}));
            CHECK(glyph.textureRect == sf::IntRect({2, 5}, {8, 12}));
            CHECK(font.hasGlyph(0x41));
            CHECK(font.hasGlyph(0xC0));
            CHECK(font.getKerning(0x41, 0x42, 12) == -1);
            CHECK(font.getKerning(0x43, 0x44, 24, true) == 0);
            CHECK(font.getLineSpacing(24) == 30);
            CHECK(font.getUnderlinePosition(36) == Approx(2.20312f));
            CHECK(font.getUnderlineThickness(48) == Approx(1.17188f));
            const auto& texture = font.getTexture(10);
            CHECK(texture.getSize() == sf::Vector2u(128, 128));
            CHECK(texture.isSmooth());
            CHECK(!texture.isSrgb());
            CHECK(!texture.isRepeated());
            CHECK(texture.getNativeHandle() != 0);
            CHECK(font.isSmooth());
        }
    }

    SECTION("loadFromMemory()")
    {
        sf::Font font;

        SECTION("Invalid data and size")
        {
            CHECK(!font.loadFromMemory(nullptr, 1));
            const std::byte byte{0xCD};
            CHECK(!font.loadFromMemory(&byte, 0));
        }

        SECTION("Successful load")
        {
            const auto memory = []()
            {
                std::ifstream file("Graphics/tuffy.ttf", std::ios::binary | std::ios::ate);
                REQUIRE(file);
                const auto size = file.tellg();
                file.seekg(0, std::ios::beg);
                std::vector<std::byte> buffer(static_cast<std::size_t>(size));
                REQUIRE(file.read(reinterpret_cast<char*>(buffer.data()), size));
                return buffer;
            }();

            REQUIRE(font.loadFromMemory(memory.data(), memory.size()));
            CHECK(font.getInfo().family == "Tuffy");
            const auto& glyph = font.getGlyph(0x45, 16, false);
            CHECK(glyph.advance == 9);
            CHECK(glyph.lsbDelta == 9);
            CHECK(glyph.rsbDelta == 16);
            CHECK(glyph.bounds == sf::FloatRect({0, -12}, {8, 12}));
            CHECK(glyph.textureRect == sf::IntRect({2, 5}, {8, 12}));
            CHECK(font.hasGlyph(0x41));
            CHECK(font.hasGlyph(0xC0));
            CHECK(font.getKerning(0x41, 0x42, 12) == -1);
            CHECK(font.getKerning(0x43, 0x44, 24, true) == 0);
            CHECK(font.getLineSpacing(24) == 30);
            CHECK(font.getUnderlinePosition(36) == Approx(2.20312f));
            CHECK(font.getUnderlineThickness(48) == Approx(1.17188f));
            const auto& texture = font.getTexture(10);
            CHECK(texture.getSize() == sf::Vector2u(128, 128));
            CHECK(texture.isSmooth());
            CHECK(!texture.isSrgb());
            CHECK(!texture.isRepeated());
            CHECK(texture.getNativeHandle() != 0);
            CHECK(font.isSmooth());
        }
    }

    SECTION("loadFromStream()")
    {
        sf::Font            font;
        sf::FileInputStream stream;

        SECTION("Invalid stream")
        {
            CHECK(!font.loadFromStream(stream));
        }

        SECTION("Successful load")
        {
            REQUIRE(stream.open("Graphics/tuffy.ttf"));
            REQUIRE(font.loadFromStream(stream));
            CHECK(font.getInfo().family == "Tuffy");
            const auto& glyph = font.getGlyph(0x45, 16, false);
            CHECK(glyph.advance == 9);
            CHECK(glyph.lsbDelta == 9);
            CHECK(glyph.rsbDelta == 16);
            CHECK(glyph.bounds == sf::FloatRect({0, -12}, {8, 12}));
            CHECK(glyph.textureRect == sf::IntRect({2, 5}, {8, 12}));
            CHECK(font.hasGlyph(0x41));
            CHECK(font.hasGlyph(0xC0));
            CHECK(font.getKerning(0x41, 0x42, 12) == -1);
            CHECK(font.getKerning(0x43, 0x44, 24, true) == 0);
            CHECK(font.getLineSpacing(24) == 30);
            CHECK(font.getUnderlinePosition(36) == Approx(2.20312f));
            CHECK(font.getUnderlineThickness(48) == Approx(1.17188f));
            const auto& texture = font.getTexture(10);
            CHECK(texture.getSize() == sf::Vector2u(128, 128));
            CHECK(texture.isSmooth());
            CHECK(!texture.isSrgb());
            CHECK(!texture.isRepeated());
            CHECK(texture.getNativeHandle() != 0);
            CHECK(font.isSmooth());
        }
    }

    SECTION("Set/get smooth")
    {
        sf::Font font;
        font.setSmooth(false);
        CHECK(!font.isSmooth());
    }
}