/*****************************************************************************
 *
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2015 Artem Pavlenko
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/

#ifndef MAPNIK_CSS_COLOR_GRAMMAR_HPP
#define MAPNIK_CSS_COLOR_GRAMMAR_HPP

// mapnik
#include <mapnik/color.hpp>
#include <mapnik/util/hsl.hpp>
#include <mapnik/safe_cast.hpp>

// boost
#pragma GCC diagnostic push
#include <mapnik/warning_ignore.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/qi_action.hpp>
#include <boost/spirit/include/qi_lexeme.hpp>
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/spirit/include/phoenix_fusion.hpp>
#include <boost/spirit/include/phoenix_function.hpp>
#include <boost/fusion/include/adapt_adt.hpp>
#pragma GCC diagnostic pop

// stl
#include <string>

BOOST_FUSION_ADAPT_ADT(
    mapnik::color,
    (unsigned, unsigned, obj.red(), obj.set_red(mapnik::safe_cast<uint8_t>(val)))
    (unsigned, unsigned, obj.green(), obj.set_green(mapnik::safe_cast<uint8_t>(val)))
    (unsigned, unsigned, obj.blue(), obj.set_blue(mapnik::safe_cast<uint8_t>(val)))
    (unsigned, unsigned, obj.alpha(), obj.set_alpha(mapnik::safe_cast<uint8_t>(val)))
    )

namespace mapnik
{

namespace qi = boost::spirit::qi;
namespace ascii = boost::spirit::ascii;
namespace phoenix = boost::phoenix;

using ascii_space_type = boost::spirit::ascii::space_type;

struct named_colors_ : qi::symbols<char,color>
{
    named_colors_()
    {
        add
            ("aliceblue", color(240, 248, 255))
            ("antiquewhite", color(250, 235, 215))
            ("aqua", color(0, 255, 255))
            ("aquamarine", color(127, 255, 212))
            ("azure", color(240, 255, 255))
            ("beige", color(245, 245, 220))
            ("bisque", color(255, 228, 196))
            ("black", color(0, 0, 0))
            ("blanchedalmond", color(255,235,205))
            ("blue", color(0, 0, 255))
            ("blueviolet", color(138, 43, 226))
            ("brown", color(165, 42, 42))
            ("burlywood", color(222, 184, 135))
            ("cadetblue", color(95, 158, 160))
            ("chartreuse", color(127, 255, 0))
            ("chocolate", color(210, 105, 30))
            ("coral", color(255, 127, 80))
            ("cornflowerblue", color(100, 149, 237))
            ("cornsilk", color(255, 248, 220))
            ("crimson", color(220, 20, 60))
            ("cyan", color(0, 255, 255))
            ("darkblue", color(0, 0, 139))
            ("darkcyan", color(0, 139, 139))
            ("darkgoldenrod", color(184, 134, 11))
            ("darkgray", color(169, 169, 169))
            ("darkgreen", color(0, 100, 0))
            ("darkgrey", color(169, 169, 169))
            ("darkkhaki", color(189, 183, 107))
            ("darkmagenta", color(139, 0, 139))
            ("darkolivegreen", color(85, 107, 47))
            ("darkorange", color(255, 140, 0))
            ("darkorchid", color(153, 50, 204))
            ("darkred", color(139, 0, 0))
            ("darksalmon", color(233, 150, 122))
            ("darkseagreen", color(143, 188, 143))
            ("darkslateblue", color(72, 61, 139))
            ("darkslategrey", color(47, 79, 79))
            ("darkturquoise", color(0, 206, 209))
            ("darkviolet", color(148, 0, 211))
            ("deeppink", color(255, 20, 147))
            ("deepskyblue", color(0, 191, 255))
            ("dimgray", color(105, 105, 105))
            ("dimgrey", color(105, 105, 105))
            ("dodgerblue", color(30, 144, 255))
            ("firebrick", color(178, 34, 34))
            ("floralwhite", color(255, 250, 240))
            ("forestgreen", color(34, 139, 34))
            ("fuchsia", color(255, 0, 255))
            ("gainsboro", color(220, 220, 220))
            ("ghostwhite", color(248, 248, 255))
            ("gold", color(255, 215, 0))
            ("goldenrod", color(218, 165, 32))
            ("gray", color(128, 128, 128))
            ("grey", color(128, 128, 128))
            ("green", color(0, 128, 0))
            ("greenyellow", color(173, 255, 47))
            ("honeydew", color(240, 255, 240))
            ("hotpink", color(255, 105, 180))
            ("indianred", color(205, 92, 92))
            ("indigo", color(75, 0, 130))
            ("ivory", color(255, 255, 240))
            ("khaki", color(240, 230, 140))
            ("lavender", color(230, 230, 250))
            ("lavenderblush", color(255, 240, 245))
            ("lawngreen", color(124, 252, 0))
            ("lemonchiffon", color(255, 250, 205))
            ("lightblue", color(173, 216, 230))
            ("lightcoral", color(240, 128, 128))
            ("lightcyan", color(224, 255, 255))
            ("lightgoldenrodyellow", color(250, 250, 210))
            ("lightgray", color(211, 211, 211))
            ("lightgreen", color(144, 238, 144))
            ("lightgrey", color(211, 211, 211))
            ("lightpink", color(255, 182, 193))
            ("lightsalmon", color(255, 160, 122))
            ("lightseagreen", color(32, 178, 170))
            ("lightskyblue", color(135, 206, 250))
            ("lightslategray", color(119, 136, 153))
            ("lightslategrey", color(119, 136, 153))
            ("lightsteelblue", color(176, 196, 222))
            ("lightyellow", color(255, 255, 224))
            ("lime", color(0, 255, 0))
            ("limegreen", color(50, 205, 50))
            ("linen", color(250, 240, 230))
            ("magenta", color(255, 0, 255))
            ("maroon", color(128, 0, 0))
            ("mediumaquamarine", color(102, 205, 170))
            ("mediumblue", color(0, 0, 205))
            ("mediumorchid", color(186, 85, 211))
            ("mediumpurple", color(147, 112, 219))
            ("mediumseagreen", color(60, 179, 113))
            ("mediumslateblue", color(123, 104, 238))
            ("mediumspringgreen", color(0, 250, 154))
            ("mediumturquoise", color(72, 209, 204))
            ("mediumvioletred", color(199, 21, 133))
            ("midnightblue", color(25, 25, 112))
            ("mintcream", color(245, 255, 250))
            ("mistyrose", color(255, 228, 225))
            ("moccasin", color(255, 228, 181))
            ("navajowhite", color(255, 222, 173))
            ("navy", color(0, 0, 128))
            ("oldlace", color(253, 245, 230))
            ("olive", color(128, 128, 0))
            ("olivedrab", color(107, 142, 35))
            ("orange", color(255, 165, 0))
            ("orangered", color(255, 69, 0))
            ("orchid", color(218, 112, 214))
            ("palegoldenrod", color(238, 232, 170))
            ("palegreen", color(152, 251, 152))
            ("paleturquoise", color(175, 238, 238))
            ("palevioletred", color(219, 112, 147))
            ("papayawhip", color(255, 239, 213))
            ("peachpuff", color(255, 218, 185))
            ("peru", color(205, 133, 63))
            ("pink", color(255, 192, 203))
            ("plum", color(221, 160, 221))
            ("powderblue", color(176, 224, 230))
            ("purple", color(128, 0, 128))
            ("red", color(255, 0, 0))
            ("rosybrown", color(188, 143, 143))
            ("royalblue", color(65, 105, 225))
            ("saddlebrown", color(139, 69, 19))
            ("salmon", color(250, 128, 114))
            ("sandybrown", color(244, 164, 96))
            ("seagreen", color(46, 139, 87))
            ("seashell", color(255, 245, 238))
            ("sienna", color(160, 82, 45))
            ("silver", color(192, 192, 192))
            ("skyblue", color(135, 206, 235))
            ("slateblue", color(106, 90, 205))
            ("slategray", color(112, 128, 144))
            ("slategrey", color(112, 128, 144))
            ("snow", color(255, 250, 250))
            ("springgreen", color(0, 255, 127))
            ("steelblue", color(70, 130, 180))
            ("tan", color(210, 180, 140))
            ("teal", color(0, 128, 128))
            ("thistle", color(216, 191, 216))
            ("tomato", color(255, 99, 71))
            ("turquoise", color(64, 224, 208))
            ("violet", color(238, 130, 238))
            ("wheat", color(245, 222, 179))
            ("white", color(255, 255, 255))
            ("whitesmoke", color(245, 245, 245))
            ("yellow", color(255, 255, 0))
            ("yellowgreen", color(154, 205, 50))
            ("transparent", color(0, 0, 0, 0))
            ;
    }
} ;

struct percent_conv_impl
{
    template <typename T>
    struct result
    {
        using type = unsigned;
    };

    unsigned operator() (double val) const
    {
        return safe_cast<uint8_t>(std::lround((255.0 * val)/100.0));
    }
};

struct alpha_conv_impl
{
    template <typename T>
    struct result
    {
        using type = unsigned;
    };

    unsigned operator() (double val) const
    {
        return safe_cast<uint8_t>(std::lround((255.0 * val)));
    }
};

struct hsl_conv_impl
{
    template<typename T>
    struct result
    {
        using type = void;
    };

    template <typename T0,typename T1, typename T2, typename T3>
    void operator() (T0 & c, T1 h, T2 s, T3 l) const
    {
        double m1,m2;
        // normalize values
        h /= 360.0;
        s /= 100.0;
        l /= 100.0;

        if (l <= 0.5)
        {
            m2 = l * (s + 1.0);
        }
        else
        {
            m2 = l + s - l*s;
        }
        m1 = l * 2 - m2;

        double r = hue_to_rgb(m1, m2, h + 1.0/3.0);
        double g = hue_to_rgb(m1, m2, h);
        double b = hue_to_rgb(m1, m2, h - 1.0/3.0);

        c.set_red(safe_cast<uint8_t>(std::lround(255.0 * r)));
        c.set_green(safe_cast<uint8_t>(std::lround(255.0 * g)));
        c.set_blue(safe_cast<uint8_t>(std::lround(255.0 * b)));
    }
};


template <typename Iterator>
struct css_color_grammar : qi::grammar<Iterator, color(), ascii_space_type>
{
    css_color_grammar();
    qi::uint_parser< unsigned, 16, 2, 2 > hex2 ;
    qi::uint_parser< unsigned, 16, 1, 1 > hex1 ;
    qi::uint_parser< unsigned, 10, 1, 3 > dec3 ;
    qi::rule<Iterator, color(), ascii_space_type> rgba_color;
    qi::rule<Iterator, color(), ascii_space_type> rgba_percent_color;
    qi::rule<Iterator, qi::locals<double,double,double>,color(), ascii_space_type> hsl_percent_color;
    qi::rule<Iterator, color(), ascii_space_type> hex_color;
    qi::rule<Iterator, color(), ascii_space_type> hex_color_small;
    qi::rule<Iterator, color(), ascii_space_type> css_color;
    named_colors_ named;
    phoenix::function<percent_conv_impl> percent_converter;
    phoenix::function<alpha_conv_impl>   alpha_converter;
    phoenix::function<hsl_conv_impl>  hsl_converter;
};

}

#endif // MAPNIK_CSS_COLOR_GRAMMAR_HPP
