/* IMPORT */
import { match, and, lazy, optional, plus, or, star } from 'grammex';
import { makeRangeAlpha, makeRangePaddedInt } from '../range.js';
import { identity } from '../utils.js';
import zeptomatch from '../index.js';
import { regex, alternation, sequence, slash } from './utils.js';
/* MAIN */
const Escaped = match(/\\./, regex);
const Escape = match(/[$.*+?^(){}[\]\|]/, char => regex(`\\${char}`));
const Slash = match(/[\\\/]/, slash);
const Passthrough = match(/[^$.*+?^(){}[\]\|\\\/]+/, regex);
const NegationOdd = match(/^(?:!!)*!(.*)$/, (_, glob) => regex(`(?!^${zeptomatch.compile(glob).source}$).*?`));
const NegationEven = match(/^(!!)+/);
const Negation = or([NegationOdd, NegationEven]);
const StarStarBetween = match(/\/(\*\*\/)+/, () => alternation([sequence([slash(), regex('.+?'), slash()]), slash()]));
const StarStarStart = match(/^(\*\*\/)+/, () => alternation([regex('^'), sequence([regex('.*?'), slash()])]));
const StarStarEnd = match(/\/(\*\*)$/, () => alternation([sequence([slash(), regex('.*?')]), regex('$')]));
const StarStarNone = match(/\*\*/, () => regex('.*?'));
const StarStar = or([StarStarBetween, StarStarStart, StarStarEnd, StarStarNone]);
const StarDouble = match(/\*\/(?!\*\*\/|\*$)/, () => sequence([regex('[^\\\\/]*?'), slash()]));
const StarSingle = match(/\*/, () => regex('[^\\\\/]*'));
const Star = or([StarDouble, StarSingle]);
const Question = match('?', () => regex('[^\\\\/]'));
const ClassOpen = match('[', identity);
const ClassClose = match(']', identity);
const ClassNegation = match(/[!^]/, '^\\\\/');
const ClassRange = match(/[a-z]-[a-z]|[0-9]-[0-9]/i, identity);
const ClassEscaped = match(/\\./, identity);
const ClassEscape = match(/[$.*+?^(){}[\|]/, char => `\\${char}`);
const ClassSlash = match(/[\\\/]/, '\\\\/');
const ClassPassthrough = match(/[^$.*+?^(){}[\]\|\\\/]+/, identity);
const ClassValue = or([ClassEscaped, ClassEscape, ClassSlash, ClassRange, ClassPassthrough]);
const Class = and([ClassOpen, optional(ClassNegation), star(ClassValue), ClassClose], _ => regex(_.join('')));
const RangeOpen = match('{', '(?:');
const RangeClose = match('}', ')');
const RangeNumeric = match(/(\d+)\.\.(\d+)/, (_, $1, $2) => makeRangePaddedInt(+$1, +$2, Math.min($1.length, $2.length)).join('|'));
const RangeAlphaLower = match(/([a-z]+)\.\.([a-z]+)/, (_, $1, $2) => makeRangeAlpha($1, $2).join('|'));
const RangeAlphaUpper = match(/([A-Z]+)\.\.([A-Z]+)/, (_, $1, $2) => makeRangeAlpha($1.toLowerCase(), $2.toLowerCase()).join('|').toUpperCase());
const RangeValue = or([RangeNumeric, RangeAlphaLower, RangeAlphaUpper]);
const Range = and([RangeOpen, RangeValue, RangeClose], _ => regex(_.join('')));
const BracesOpen = match('{');
const BracesClose = match('}');
const BracesComma = match(',');
const BracesEscaped = match(/\\./, regex);
const BracesEscape = match(/[$.*+?^(){[\]\|]/, char => regex(`\\${char}`));
const BracesSlash = match(/[\\\/]/, slash);
const BracesPassthrough = match(/[^$.*+?^(){}[\]\|\\\/,]+/, regex);
const BracesNested = lazy(() => Braces);
const BracesEmptyValue = match('', () => regex('(?:)'));
const BracesFullValue = plus(or([StarStar, Star, Question, Class, Range, BracesNested, BracesEscaped, BracesEscape, BracesSlash, BracesPassthrough]), sequence);
const BracesValue = or([BracesFullValue, BracesEmptyValue]);
const Braces = and([BracesOpen, optional(and([BracesValue, star(and([BracesComma, BracesValue]))])), BracesClose], alternation);
const Grammar = star(or([Negation, StarStar, Star, Question, Class, Range, Braces, Escaped, Escape, Slash, Passthrough]), sequence);
/* EXPORT */
export default Grammar;
