import { URIRegExps } from "./uri";
import { merge, subexp } from "./util";

export function buildExps(isIRI:boolean):URIRegExps {
	const
		ALPHA$$ = "[A-Za-z]",
		CR$ = "[\\x0D]",
		DIGIT$$ = "[0-9]",
		DQUOTE$$ = "[\\x22]",
		HEXDIG$$ = merge(DIGIT$$, "[A-Fa-f]"),  //case-insensitive
		LF$$ = "[\\x0A]",
		SP$$ = "[\\x20]",
		PCT_ENCODED$ = subexp(subexp("%[EFef]" + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$) + "|" + subexp("%[89A-Fa-f]" + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$) + "|" + subexp("%" + HEXDIG$$ + HEXDIG$$)),  //expanded
		GEN_DELIMS$$ = "[\\:\\/\\?\\#\\[\\]\\@]",
		SUB_DELIMS$$ = "[\\!\\$\\&\\'\\(\\)\\*\\+\\,\\;\\=]",
		RESERVED$$ = merge(GEN_DELIMS$$, SUB_DELIMS$$),
		UCSCHAR$$ = isIRI ? "[\\xA0-\\u200D\\u2010-\\u2029\\u202F-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF]" : "[]",  //subset, excludes bidi control characters
		IPRIVATE$$ = isIRI ? "[\\uE000-\\uF8FF]" : "[]",  //subset
		UNRESERVED$$ = merge(ALPHA$$, DIGIT$$, "[\\-\\.\\_\\~]", UCSCHAR$$),
		SCHEME$ = subexp(ALPHA$$ + merge(ALPHA$$, DIGIT$$, "[\\+\\-\\.]") + "*"),
		USERINFO$ = subexp(subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\:]")) + "*"),
		DEC_OCTET$ = subexp(subexp("25[0-5]") + "|" + subexp("2[0-4]" + DIGIT$$) + "|" + subexp("1" + DIGIT$$ + DIGIT$$) + "|" + subexp("[1-9]" + DIGIT$$) + "|" + DIGIT$$),
		IPV4ADDRESS$ = subexp(DEC_OCTET$ + "\\." + DEC_OCTET$ + "\\." + DEC_OCTET$ + "\\." + DEC_OCTET$),
		H16$ = subexp(HEXDIG$$ + "{1,4}"),
		LS32$ = subexp(subexp(H16$ + "\\:" + H16$) + "|" + IPV4ADDRESS$),
		IPV6ADDRESS1$ = subexp(                                                            subexp(H16$ + "\\:") + "{6}" + LS32$), //                           6( h16 ":" ) ls32
		IPV6ADDRESS2$ = subexp(                                                 "\\:\\:" + subexp(H16$ + "\\:") + "{5}" + LS32$), //                      "::" 5( h16 ":" ) ls32
		IPV6ADDRESS3$ = subexp(subexp(                                 H16$) + "?\\:\\:" + subexp(H16$ + "\\:") + "{4}" + LS32$), //[               h16 ] "::" 4( h16 ":" ) ls32
		IPV6ADDRESS4$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,1}" + H16$) + "?\\:\\:" + subexp(H16$ + "\\:") + "{3}" + LS32$), //[ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
		IPV6ADDRESS5$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,2}" + H16$) + "?\\:\\:" + subexp(H16$ + "\\:") + "{2}" + LS32$), //[ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
		IPV6ADDRESS6$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,3}" + H16$) + "?\\:\\:" +        H16$ + "\\:"          + LS32$), //[ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
		IPV6ADDRESS7$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,4}" + H16$) + "?\\:\\:"                                + LS32$), //[ *4( h16 ":" ) h16 ] "::"              ls32
		IPV6ADDRESS8$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,5}" + H16$) + "?\\:\\:"                                + H16$ ), //[ *5( h16 ":" ) h16 ] "::"              h16
		IPV6ADDRESS9$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,6}" + H16$) + "?\\:\\:"                                       ), //[ *6( h16 ":" ) h16 ] "::"
		IPV6ADDRESS$ = subexp([IPV6ADDRESS1$, IPV6ADDRESS2$, IPV6ADDRESS3$, IPV6ADDRESS4$, IPV6ADDRESS5$, IPV6ADDRESS6$, IPV6ADDRESS7$, IPV6ADDRESS8$, IPV6ADDRESS9$].join("|")),
		IPVFUTURE$ = subexp("[vV]" + HEXDIG$$ + "+\\." + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\:]") + "+"),
		IP_LITERAL$ = subexp("\\[" + subexp(IPV6ADDRESS$ + "|" + IPVFUTURE$) + "\\]"),
		REG_NAME$ = subexp(subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$)) + "*"),
		HOST$ = subexp(IP_LITERAL$ + "|" + IPV4ADDRESS$ + "(?!" + REG_NAME$ + ")" + "|" + REG_NAME$),
		PORT$ = subexp(DIGIT$$ + "*"),
		AUTHORITY$ = subexp(subexp(USERINFO$ + "@") + "?" + HOST$ + subexp("\\:" + PORT$) + "?"),
		PCHAR$ = subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\:\\@]")),
		SEGMENT$ = subexp(PCHAR$ + "*"),
		SEGMENT_NZ$ = subexp(PCHAR$ + "+"),
		SEGMENT_NZ_NC$ = subexp(subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\@]")) + "+"),
		PATH_ABEMPTY$ = subexp(subexp("\\/" + SEGMENT$) + "*"),
		PATH_ABSOLUTE$ = subexp("\\/" + subexp(SEGMENT_NZ$ + PATH_ABEMPTY$) + "?"),  //simplified
		PATH_NOSCHEME$ = subexp(SEGMENT_NZ_NC$ + PATH_ABEMPTY$),  //simplified
		PATH_ROOTLESS$ = subexp(SEGMENT_NZ$ + PATH_ABEMPTY$),  //simplified
		PATH_EMPTY$ = "(?!" + PCHAR$ + ")",
		PATH$ = subexp(PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_NOSCHEME$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$),
		QUERY$ = subexp(subexp(PCHAR$ + "|" + merge("[\\/\\?]", IPRIVATE$$)) + "*"),
		FRAGMENT$ = subexp(subexp(PCHAR$ + "|[\\/\\?]") + "*"),
		HIER_PART$ = subexp(subexp("\\/\\/" + AUTHORITY$ + PATH_ABEMPTY$) + "|" + PATH_ABSOLUTE$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$),
		URI$ = subexp(SCHEME$ + "\\:" + HIER_PART$ + subexp("\\?" + QUERY$) + "?" + subexp("\\#" + FRAGMENT$) + "?"),
		RELATIVE_PART$ = subexp(subexp("\\/\\/" + AUTHORITY$ + PATH_ABEMPTY$) + "|" + PATH_ABSOLUTE$ + "|" + PATH_NOSCHEME$ + "|" + PATH_EMPTY$),
		RELATIVE$ = subexp(RELATIVE_PART$ + subexp("\\?" + QUERY$) + "?" + subexp("\\#" + FRAGMENT$) + "?"),
		URI_REFERENCE$ = subexp(URI$ + "|" + RELATIVE$),
		ABSOLUTE_URI$ = subexp(SCHEME$ + "\\:" + HIER_PART$ + subexp("\\?" + QUERY$) + "?"),

		GENERIC_REF$ = "^(" + SCHEME$ + ")\\:" + subexp(subexp("\\/\\/(" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?)") + "?(" + PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$ + ")") + subexp("\\?(" + QUERY$ + ")") + "?" + subexp("\\#(" + FRAGMENT$ + ")") + "?$",
		RELATIVE_REF$ = "^(){0}" + subexp(subexp("\\/\\/(" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?)") + "?(" + PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_NOSCHEME$ + "|" + PATH_EMPTY$ + ")") + subexp("\\?(" + QUERY$ + ")") + "?" + subexp("\\#(" + FRAGMENT$ + ")") + "?$",
		ABSOLUTE_REF$ = "^(" + SCHEME$ + ")\\:" + subexp(subexp("\\/\\/(" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?)") + "?(" + PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$ + ")") + subexp("\\?(" + QUERY$ + ")") + "?$",
		SAMEDOC_REF$ = "^" + subexp("\\#(" + FRAGMENT$ + ")") + "?$",
		AUTHORITY_REF$ = "^" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?$"
	;

	return {
		NOT_SCHEME : new RegExp(merge("[^]", ALPHA$$, DIGIT$$, "[\\+\\-\\.]"), "g"),
		NOT_USERINFO : new RegExp(merge("[^\\%\\:]", UNRESERVED$$, SUB_DELIMS$$), "g"),
		NOT_HOST : new RegExp(merge("[^\\%\\[\\]\\:]", UNRESERVED$$, SUB_DELIMS$$), "g"),
		NOT_PATH : new RegExp(merge("[^\\%\\/\\:\\@]", UNRESERVED$$, SUB_DELIMS$$), "g"),
		NOT_PATH_NOSCHEME : new RegExp(merge("[^\\%\\/\\@]", UNRESERVED$$, SUB_DELIMS$$), "g"),
		NOT_QUERY : new RegExp(merge("[^\\%]", UNRESERVED$$, SUB_DELIMS$$, "[\\:\\@\\/\\?]", IPRIVATE$$), "g"),
		NOT_FRAGMENT : new RegExp(merge("[^\\%]", UNRESERVED$$, SUB_DELIMS$$, "[\\:\\@\\/\\?]"), "g"),
		ESCAPE : new RegExp(merge("[^]", UNRESERVED$$, SUB_DELIMS$$), "g"),
		UNRESERVED : new RegExp(UNRESERVED$$, "g"),
		OTHER_CHARS : new RegExp(merge("[^\\%]", UNRESERVED$$, RESERVED$$), "g"),
		PCT_ENCODED : new RegExp(PCT_ENCODED$, "g"),
		IPV6ADDRESS : new RegExp("\\[?(" + IPV6ADDRESS$ + ")\\]?", "g")
	};
}

export default buildExps(false);
