/**************************************************************************************[Options.cc]
 Copyright (c) 2008-2010, Niklas Sorensson

 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
 associated documentation files (the "Software"), to deal in the Software without restriction,
 including without limitation the rights to use, copy, modify, merge, publish, distribute,
 sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all copies or
 substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
 NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
 OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 **************************************************************************************************/

#include "monosat/mtl/Sort.h"
#include "monosat/utils/Options.h"

using namespace Monosat;

void Monosat::parseOptions(int& argc, char** argv, bool strict){
    parseOptionSets_(argc, argv);//parse option sets first
    parseOptions_(argc, argv, strict);
}

void Monosat::parseOptionSets_(int argc, char** argv){
    vec<OptionSet*> parsed_opts;
    int i, j;
    for(i = j = 1; i < argc; i++){
        const char* str = argv[i];

        bool parsed_ok = false;

        for(int k = 0; !parsed_ok && k < Option::getOptionSetList().size(); k++){
            parsed_ok = Option::getOptionSetList()[k]->parse(argv[i]);
            if(parsed_ok){
                parsed_opts.push(Option::getOptionSetList()[k]);
            }
        }
    }

    //only process parsed option sets here, to avoid non-terminating recursion
    for(OptionSet* opt:parsed_opts){
        if(*opt){
            //if the option was set to true, then parse its default option set
            vec<char*>& opts = opt->getOpts();
            int size = opts.size();
            char** opts_ = &(*opts);
            parseOptions(size, opts_, true);
        }
    }

}

void Monosat::parseOptions_(int& argc, char** argv, bool strict){
    int i, j;
    for(i = j = 1; i < argc; i++){
        const char* str = argv[i];
        if(match(str, "--") && match(str, Option::getHelpPrefixString()) && match(str, "help")){
            if(*str == '\0')
                printUsageAndExit(argc, argv);
            else if(match(str, "-verb"))
                printUsageAndExit(argc, argv, true);
        }else{
            bool parsed_ok = false;

            for(int k = 0; !parsed_ok && k < Option::getOptionList().size(); k++){
                parsed_ok = Option::getOptionList()[k]->parse(argv[i]);

                // fprintf(stderr, "checking %d: %s against flag <%s> (%s)\n", i, argv[i], Option::getOptionList()[k]->name, parsed_ok ? "ok" : "skip");
            }

            if(!parsed_ok){
                if(match(str, "-") && match(str, Option::getHelpPrefixString()) && match_end(str, "h")){
                    printUsageAndExit(argc, argv);
                }else{
                    if(strict && match(argv[i], "-"))
                        fprintf(stderr, "ERROR! Unknown flag \"%s\". Use '--%shelp' for help.\n", argv[i],
                                Option::getHelpPrefixString()), exit(1);
                    else
                        argv[j++] = argv[i];
                }
            }
        }
    }

    argc -= (i - j);
}

void Monosat::setUsageHelp(const char* str){
    Option::getUsageString() = str;
}

void Monosat::setHelpPrefixStr(const char* str){
    Option::getHelpPrefixString() = str;
}

void Monosat::printUsageAndExit(int argc, char** argv, bool verbose){
    const char* usage = Option::getUsageString();
    if(usage != NULL)
        fprintf(stderr, usage, argv[0]);

    sort(Option::getOptionList(), Option::OptionLt());

    const char* prev_cat = NULL;
    const char* prev_type = NULL;

    for(int i = 0; i < Option::getOptionList().size(); i++){
        const char* cat = Option::getOptionList()[i]->category;
        const char* type = Option::getOptionList()[i]->type_name;

        if(cat != prev_cat)
            fprintf(stderr, "\n%s OPTIONS:\n\n", cat);
        else if(type != prev_type)
            fprintf(stderr, "\n");

        Option::getOptionList()[i]->help(verbose);

        prev_cat = Option::getOptionList()[i]->category;
        prev_type = Option::getOptionList()[i]->type_name;
    }

    fprintf(stderr, "\nHELP OPTIONS:\n\n");
    fprintf(stderr, "  --%shelp        Print help message.\n", Option::getHelpPrefixString());
    fprintf(stderr, "  --%shelp-verb   Print verbose help message.\n", Option::getHelpPrefixString());
    fprintf(stderr, "\n");
    exit(0);
}

