#ifndef URILIB_GRAMMAR_H
#define URILIB_GRAMMAR_H

#include <boost/spirit/core.hpp>
#include <iostream>
#include <string>

using namespace std;
using namespace boost::spirit;

namespace urilib
{
////////////////////////////////////////////////////////////////////////////
//
//  Semantic actions
//
////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////
//
//  Grammar
//
////////////////////////////////////////////////////////////////////////////
	struct Grammar : public grammar<Grammar>
    {
        template <typename ScannerT>
        struct definition
        {
            definition(Grammar const& self)
            {
                lowalpha = ch_p('a') | ch_p('b') | ch_p('c') | ch_p('d') | ch_p('e') | ch_p('f') | ch_p('g') | ch_p('h') | ch_p('i') |
								ch_p('j') | ch_p('k') | ch_p('l') | ch_p('m') | ch_p('n') | ch_p('o') | ch_p('p') | ch_p('q') | ch_p('r') |
								ch_p('s') | ch_p('t') | ch_p('u') | ch_p('v') | ch_p('w') | ch_p('x') | ch_p('y') | ch_p('z');
				upalpha  = ch_p('A') | ch_p('B') | ch_p('C') | ch_p('D') | ch_p('E') | ch_p('F') | ch_p('G') | ch_p('H') | ch_p('I') |
								 ch_p('J') | ch_p('K') | ch_p('L') | ch_p('M') | ch_p('N') | ch_p('O') | ch_p('P') | ch_p('Q') | ch_p('R') |
								 ch_p('S') | ch_p('T') | ch_p('U') | ch_p('V') | ch_p('W') | ch_p('X') | ch_p('Y') | ch_p('Z');
				digit    = ch_p('0') | ch_p('1') | ch_p('2') | ch_p('3') | ch_p('4') | ch_p('5') | ch_p('6') | ch_p('7') |
								 ch_p('8') | ch_p('9');
				alphanum      = alpha | digit;
				alpha         = lowalpha | upalpha;
				hex           = digit | ch_p('A') | ch_p('B') | ch_p('C') | ch_p('D') | ch_p('E') | ch_p('F') |
											  ch_p('a') | ch_p('b') | ch_p('c') | ch_p('d') | ch_p('e') | ch_p('f');
				escaped       = ch_p('%') >> hex >> hex;
				mark          = ch_p('-') | ch_p('_') | ch_p('.') | ch_p('!') | ch_p('~') | ch_p('*') | ch_p('\'') |  ch_p('(') | ch_p(')');
				unreserved    = alphanum | mark;
				reserved      = ch_p(';') | ch_p('/') | ch_p('?') | ch_p(':') | ch_p('@') | ch_p('&') | ch_p('=') | ch_p('+') | ch_p('$') | ch_p(',');
				uric          = reserved | unreserved | escaped;
				query         = *uric;
				fragment      = *uric;
				pchar         = unreserved | escaped | ch_p(':') | ch_p('@') | ch_p('&') | ch_p('=') | ch_p('+') | ch_p('$') | ch_p(',');
				param         = *pchar;
				segment       = *pchar >> *( ch_p(';') >> param );
				path_segments = segment >> *( ch_p('/') >> segment );
				IPv4address   = +digit >> ch_p('.') >> +digit >> ch_p('.') >> +digit >> ch_p('.') >> +digit;
				port          = *digit;
				domainlabel   = alphanum | alphanum >> *( alphanum | ch_p('-')) >> alphanum;
				toplabel      = alpha | alpha >> *( alphanum | ch_p('-' )) >> alphanum;
				hostname      = *( domainlabel >> '.' ) >> toplabel [ ch_p('.') ];
				host          = hostname | IPv4address;
				hostport      = host [ ch_p(':') >> port ];
				userinfo      = *( unreserved | escaped | ch_p(';') | ch_p(':') | ch_p('&') | ch_p('=') | ch_p('+') | ch_p('$') | ch_p(',') );
				server        =   userinfo >> ch_p('@') >> hostport ;
				reg_name      = +( unreserved | escaped | ch_p('$') | ch_p(',') | ch_p(';') | ch_p(':') | ch_p('@') | ch_p('&') | ch_p('=') | ch_p('+') );
				rel_segment   = +( unreserved | escaped | ch_p(';') | ch_p('@') | ch_p('&') | ch_p('=') | ch_p('+') | ch_p('$') | ch_p(',') );
				scheme        = alpha >> *( alpha | digit | ch_p('+') | ch_p('-') | ch_p('.' ));
				authority     = server | reg_name;
				abs_path      = ch_p('/')  >> path_segments;
				rel_path      = rel_segment [ abs_path ];
				net_path      = ch_p('//') >> authority [ abs_path ];
				uric_no_slash = unreserved | escaped | ch_p(';') | ch_p('?') | ch_p(':') | ch_p('@') | ch_p('&') | ch_p('=') | ch_p('+') | ch_p('$') | ch_p(',');
				opaque_part   = uric_no_slash >> *uric;
				path          =  abs_path | opaque_part ;
				hier_part     = ( net_path | abs_path ) [ ch_p('?') >> query ];
				relativeURI   = ( net_path | abs_path | rel_path ) [ ch_p('?') >> query ];
				absoluteURI   = scheme >> ch_p(':') >> ( hier_part | opaque_part );
				URI_reference = ( absoluteURI | relativeURI ) [ '#' >> fragment ];
            }

            rule<ScannerT> lowalpha,upalpha,digit,alphanum,alpha,hex,mark ,unreserved ,reserved, uric,query,fragment,pchar,
						   param,segment,path_segments,IPv4address,port,domainlabel,toplabel,hostname ,host ,hostport , userinfo,
						   server,reg_name,rel_segment, scheme ,authority,abs_path, rel_path , net_path , uric_no_slash , opaque_part, path ,
						   hier_part, relativeURI, absoluteURI , URI_reference, escaped;

            rule<ScannerT> const&
            start() const { return URI_reference; }
        };
    };
};
#endif