//////////////////////////////////////////////////////////////////////////////
// This file is part of the Journey MMORPG client                           //
// Copyright © 2015-2016 Daniel Allendorf                                   //
//                                                                          //
// This program is free software: you can redistribute it and/or modify     //
// it under the terms of the GNU Affero General Public License as           //
// published by the Free Software Foundation, either version 3 of the       //
// License, or (at your option) any later version.                          //
//                                                                          //
// This program 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 Affero General Public License for more details.                      //
//                                                                          //
// You should have received a copy of the GNU Affero General Public License //
// along with this program.  If not, see <http://www.gnu.org/licenses/>.    //
//////////////////////////////////////////////////////////////////////////////
#include "Charset.h"

namespace jrc
{
    Charset::Charset(nl::node src, Alignment alignment)
        : alignment(alignment) {

        for (auto sub : src)
        {
            std::string name = sub.name();
            if (sub.data_type() != nl::node::type::bitmap || name.empty())
                continue;

            char c = *name.begin();
            if (c == '\\')
            {
                c = '/';
            }
            chars.emplace(c, sub);
        }
    }

    Charset::Charset()
        : alignment(LEFT) {}

    void Charset::draw(int8_t c, const DrawArgument& args) const
    {
        auto iter = chars.find(c);
        if (iter != chars.end())
            iter->second.draw(args);
    }

    int16_t Charset::getw(int8_t c) const
    {
        auto iter = chars.find(c);
        return iter != chars.end() ? iter->second.width() : 0;
    }

    int16_t Charset::draw(const std::string& text, const DrawArgument& args) const
    {
        int16_t shift = 0;
        int16_t total = 0;

        switch (alignment)
        {
        case CENTER:
            for (char c : text)
            {
                total += getw(c);
            }
            shift -= total / 2;
        case LEFT:
            for (char c : text)
            {
                draw(c, args + Point<int16_t>(shift, 0));
                shift += getw(c);
            }
            break;
        case RIGHT:
            for (auto iter = text.rbegin(); iter != text.rend(); ++iter)
            {
                char c = *iter;
                shift += getw(c);
                draw(c, args - Point<int16_t>(shift, 0));
            }
            break;
        }
        return shift;
    }

    int16_t Charset::draw(const std::string& text, int16_t hspace, const DrawArgument& args) const
    {
        size_t length = text.size();
        int16_t shift = 0;

        switch (alignment)
        {
        case CENTER:
            shift -= hspace * static_cast<int16_t>(length) / 2;
        case LEFT:
            for (char c : text)
            {
                draw(c, args + Point<int16_t>(shift, 0));
                shift += hspace;
            }
            break;
        case RIGHT:
            for (auto iter = text.rbegin(); iter != text.rend(); ++iter)
            {
                char c = *iter;
                shift += hspace;
                draw(c, args - Point<int16_t>(shift, 0));
            }
            break;
        }
        return shift;
    }
}