/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#pragma once

#include <optional>

#include <react/renderer/css/CSSColorFunction.h>
#include <react/renderer/css/CSSDataType.h>
#include <react/renderer/css/CSSHexColor.h>
#include <react/renderer/css/CSSNamedColor.h>

namespace facebook::react {

/**
 * Representation of CSS <color> data type
 * https://www.w3.org/TR/css-color-5/#typedef-color
 */
struct CSSColor {
  uint8_t r{};
  uint8_t g{};
  uint8_t b{};
  uint8_t a{};

  constexpr bool operator==(const CSSColor &rhs) const = default;

  static constexpr CSSColor black()
  {
    return {.r = 0, .g = 0, .b = 0, .a = 255};
  }
};

template <>
struct CSSDataTypeParser<CSSColor> {
  static constexpr auto consumePreservedToken(const CSSPreservedToken &token) -> std::optional<CSSColor>
  {
    if (token.type() == CSSTokenType::Ident) {
      return parseCSSNamedColor<CSSColor>(token.stringValue());
    } else if (token.type() == CSSTokenType::Hash) {
      return parseCSSHexColor<CSSColor>(token.stringValue());
    }

    return {};
  }

  static constexpr auto consumeFunctionBlock(const CSSFunctionBlock &func, CSSValueParser &parser)
      -> std::optional<CSSColor>
  {
    return parseCSSColorFunction<CSSColor>(func.name, parser);
  }
};

static_assert(CSSDataType<CSSColor>);

} // namespace facebook::react