/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/EnumBits.h>
#include <AK/Noncopyable.h>
#include <AK/Vector.h>
#include <LibVT/Color.h>
#include <LibVT/XtermColors.h>

#ifndef KERNEL
#    include <AK/ByteString.h>
#endif

namespace VT {

struct Attribute {
    static constexpr Color default_foreground_color = Color::named(Color::ANSIColor::DefaultForeground);
    static constexpr Color default_background_color = Color::named(Color::ANSIColor::DefaultBackground);

    void reset()
    {
        foreground_color = default_foreground_color;
        background_color = default_background_color;
        flags = Flags::NoAttributes;
#ifndef KERNEL
        href = {};
        href_id = {};
#endif
    }

    Color foreground_color { default_foreground_color };
    Color background_color { default_background_color };

#ifndef KERNEL
    ByteString href;
    Optional<ByteString> href_id;
#endif

    enum class Flags : u8 {
        NoAttributes = 0x00,
        Bold = 0x01,
        Italic = 0x02,
        Underline = 0x04,
        Negative = 0x08,
        Blink = 0x10,
        Touched = 0x20,
        Concealed = 0x40,
    };
    AK_ENUM_BITWISE_FRIEND_OPERATORS(Flags);

    constexpr Color effective_background_color() const { return has_flag(flags, Flags::Negative) ? foreground_color : background_color; }
    constexpr Color effective_foreground_color() const { return has_flag(flags, Flags::Negative) ? background_color : foreground_color; }

    constexpr bool is_untouched() const { return !has_flag(flags, Flags::Touched); }

    Flags flags { Flags::NoAttributes };

    constexpr bool operator==(Attribute const& other) const
    {
        return foreground_color == other.foreground_color && background_color == other.background_color && flags == other.flags;
    }
};

}