/*  GRAPHITE2 LICENSING

    Copyright 2010, SIL International
    All rights reserved.

    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 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
    Lesser General Public License for more details.

    You should also have received a copy of the GNU Lesser General Public
    License along with this library in the file named "LICENSE".
    If not, write to the Free Software Foundation, 51 Franklin Street,
    Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
    internet at http://www.fsf.org/licenses/lgpl.html.
*/
#pragma once

class Option
{
public:
    typedef enum {
        OPTION_BOOL,
        OPTION_STRING,
        OPTION_INT,
        OPTION_FLOAT
    } OptionType;
    Option(const char * shortOpt, const char * longOpt, const char * desc, OptionType type)
        : m_shortOption(shortOpt), m_longOption(longOpt), m_description(desc),
        m_type(type), m_position(-1)
    {

    }
    ~Option()
    {

    }
    void setPosition(int i) { m_position = i; }
    const char * shortOption() const { return m_shortOption; }
    const char * longOption() const { return m_longOption; }
    const char * description() const { return m_description; }
    bool exists() { return m_position > -1; }
    const char * get(char ** argv) const { return (m_position > -1)? argv[m_position] : NULL; }
    int getInt(char ** argv) const { return (m_position > -1)? atoi(argv[m_position]) : 0; }
    float getFloat(char ** argv) const { return (m_position > -1)? static_cast<float>(atof(argv[m_position])) : 0.0f; }
    OptionType type() const { return m_type; }
private:
    const char * m_shortOption;
    const char * m_longOption;
    const char * m_description;
    OptionType m_type;
    int m_position;
};

// enum must be in same order as rendererOptions
typedef enum {
    OptTextFile,
    OptFontFile,
    OptSize,
    OptScript,
    OptGraphite,
    OptGraphite2,
    OptGraphite2s,
    OptHarfbuzzNg,
    OptHarfbuzz,
    OptIcu,
    OptUniscribe,
    OptRtl,
    OptRepeat,
    OptTolerance,
    OptFractionalTolerance,
    OptCompare,
    OptLogFile,
    OptVerbose,
    OptAlternativeFont,
    OptIgnoreGlyphIdDifferences,
    OptTrace,
    OptDemand,
    OptFeatures,
    OptAltFeatures,
    OptQuiet
} OptionId;

static Option rendererOptions[] = {
    Option("-t", "--text", "Text file", Option::OPTION_STRING),
    Option("-f", "--font", "Font file", Option::OPTION_STRING),
    Option("-s", "--size", "Font size", Option::OPTION_INT),
    Option("-S", "--script", "Script tag", Option::OPTION_STRING),
    Option("-g", "--graphite", "Use Graphite renderer", Option::OPTION_BOOL),
    Option("-n", "--graphite2", "Use Graphite2 renderer", Option::OPTION_BOOL),
    Option("-N", "--graphite2uc", "Use Graphite2 uncached renderer", Option::OPTION_BOOL),
    Option("-h", "--harfbuzzng", "Use Harfbuzz NG renderer", Option::OPTION_BOOL),
    Option("-H", "--harfbuzz", "Use Harfbuzz renderer", Option::OPTION_BOOL),
    Option("-i", "--icu", "Use ICU renderer", Option::OPTION_BOOL),
    Option("-u", "--uniscribe", "Use Uniscribe renderer with specified usp10.dll", Option::OPTION_STRING),
    Option("-r", "--rtl", "Right to left", Option::OPTION_BOOL),
    Option("", "--repeat", "Number of times to rerun rendering", Option::OPTION_INT),
    Option("", "--tolerance", "Ignore differences in position smaller than this", Option::OPTION_FLOAT),
    Option("", "--fractional-tolerance", "Ignore differences in position smaller than this", Option::OPTION_FLOAT),
    Option("-c", "--compare", "Compare glyph output", Option::OPTION_BOOL),
    Option("-l", "--log", "Log file for results instead of stdout", Option::OPTION_STRING),
    Option("-v", "--verbose", "Output lots of info", Option::OPTION_BOOL),
    Option("-a", "--alt-font", "Alternative font file", Option::OPTION_STRING),
    Option("", "--ignore-gid", "Ignore Glyph IDs in comparison (use with -c -a alt.ttf)", Option::OPTION_BOOL),
    Option("", "--trace", "JSON trace log file", Option::OPTION_STRING),
    Option("", "--demand", "Load glyphs on demand", Option::OPTION_BOOL),
    Option("", "--features", "Feature list", Option::OPTION_STRING),
    Option("", "--alt-features", "Feature list for alternative font (if different)", Option::OPTION_STRING),
    Option("-q", "--quiet", "Supress all output, including error messages", Option::OPTION_BOOL)
};

const int NUM_RENDERER_OPTIONS = sizeof(rendererOptions) / sizeof(Option);

void showOptions()
{
    const char * optionTypeDesc[] = {
        "", "arg", "int", "float"
    };
    for (size_t i = 0; i < NUM_RENDERER_OPTIONS; i++)
    {
        fprintf(stderr, "%s %s\t%s\t%s\n", rendererOptions[i].shortOption(),
                rendererOptions[i].longOption(),
                optionTypeDesc[rendererOptions[i].type()],
                rendererOptions[i].description());
    }
}


bool parseOptions(int argc, char ** argv)
{
    for (int i = 1; i < argc; i++)
    {
        bool known = false;
        for (int j = 0; j < NUM_RENDERER_OPTIONS && (!known); j++)
        {
            if ((strcmp(argv[i], rendererOptions[j].longOption()) == 0) ||
                ((strlen(rendererOptions[j].shortOption()) > 0) &&
                 (strcmp(argv[i], rendererOptions[j].shortOption()) == 0)))
            {
                known = true;
                if (rendererOptions[j].type() > Option::OPTION_BOOL)
                {
                    if (argc > i + 1)
                    {
                        rendererOptions[j].setPosition(++i);
                    }
                    else
                    {
                        return false;
                    }
                }
                else
                {
                    rendererOptions[j].setPosition(i);
                }
            }
        }
        if (!known) return false;
    }
    return true;
}
