import PatternParser from './AsYouTypeFormatter.PatternParser.js';

function _createForOfIteratorHelperLoose(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (t) return (t = t.call(r)).next.bind(t); if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e) { t && (r = t); var o = 0; return function () { return o >= r.length ? { done: true } : { done: false, value: r[o++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || false, o.configurable = true, "value" in o && (o.writable = true), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), Object.defineProperty(e, "prototype", { writable: false }), e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return (String )(t); }
var PatternMatcher = /*#__PURE__*/function () {
  function PatternMatcher(pattern) {
    _classCallCheck(this, PatternMatcher);
    this.matchTree = new PatternParser().parse(pattern);
  }
  return _createClass(PatternMatcher, [{
    key: "match",
    value: function match(string) {
      var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
        allowOverflow = _ref.allowOverflow;
      if (!string) {
        throw new Error('String is required');
      }
      var result = _match(string.split(''), this.matchTree, true);
      if (result && result.match) {
        delete result.matchedChars;
      }
      if (result && result.overflow) {
        if (!allowOverflow) {
          return;
        }
      }
      return result;
    }
  }]);
}();
function _match(characters, tree, last) {
  // If `tree` is a string, then `tree` is a single character.
  // That's because when a pattern is parsed, multi-character-string parts
  // of a pattern are compiled into arrays of single characters.
  // I still wrote this piece of code for a "general" hypothetical case
  // when `tree` could be a string of several characters, even though
  // such case is not possible with the current implementation.
  if (typeof tree === 'string') {
    var characterString = characters.join('');
    if (tree.indexOf(characterString) === 0) {
      // `tree` is always a single character.
      // If `tree.indexOf(characterString) === 0`
      // then `characters.length === tree.length`.
      /* istanbul ignore else */
      if (characters.length === tree.length) {
        return {
          match: true,
          matchedChars: characters
        };
      }
      // `tree` is always a single character.
      // If `tree.indexOf(characterString) === 0`
      // then `characters.length === tree.length`.
      /* istanbul ignore next */
      return {
        partialMatch: true
        // matchedChars: characters
      };
    }
    if (characterString.indexOf(tree) === 0) {
      if (last) {
        // The `else` path is not possible because `tree` is always a single character.
        // The `else` case for `characters.length > tree.length` would be
        // `characters.length <= tree.length` which means `characters.length <= 1`.
        // `characters` array can't be empty, so that means `characters === [tree]`,
        // which would also mean `tree.indexOf(characterString) === 0` and that'd mean
        // that the `if (tree.indexOf(characterString) === 0)` condition before this
        // `if` condition would be entered, and returned from there, not reaching this code.
        /* istanbul ignore else */
        if (characters.length > tree.length) {
          return {
            overflow: true
          };
        }
      }
      return {
        match: true,
        matchedChars: characters.slice(0, tree.length)
      };
    }
    return;
  }
  if (Array.isArray(tree)) {
    var restCharacters = characters.slice();
    var i = 0;
    while (i < tree.length) {
      var subtree = tree[i];
      var result = _match(restCharacters, subtree, last && i === tree.length - 1);
      if (!result) {
        return;
      } else if (result.overflow) {
        return result;
      } else if (result.match) {
        // Continue with the next subtree with the rest of the characters.
        restCharacters = restCharacters.slice(result.matchedChars.length);
        if (restCharacters.length === 0) {
          if (i === tree.length - 1) {
            return {
              match: true,
              matchedChars: characters
            };
          } else {
            return {
              partialMatch: true
              // matchedChars: characters
            };
          }
        }
      } else {
        /* istanbul ignore else */
        if (result.partialMatch) {
          return {
            partialMatch: true
            // matchedChars: characters
          };
        } else {
          throw new Error("Unsupported match result:\n".concat(JSON.stringify(result, null, 2)));
        }
      }
      i++;
    }
    // If `last` then overflow has already been checked
    // by the last element of the `tree` array.
    /* istanbul ignore if */
    if (last) {
      return {
        overflow: true
      };
    }
    return {
      match: true,
      matchedChars: characters.slice(0, characters.length - restCharacters.length)
    };
  }
  switch (tree.op) {
    case '|':
      var partialMatch;
      for (var _iterator = _createForOfIteratorHelperLoose(tree.args), _step; !(_step = _iterator()).done;) {
        var branch = _step.value;
        var _result = _match(characters, branch, last);
        if (_result) {
          if (_result.overflow) {
            return _result;
          } else if (_result.match) {
            return {
              match: true,
              matchedChars: _result.matchedChars
            };
          } else {
            /* istanbul ignore else */
            if (_result.partialMatch) {
              partialMatch = true;
            } else {
              throw new Error("Unsupported match result:\n".concat(JSON.stringify(_result, null, 2)));
            }
          }
        }
      }
      if (partialMatch) {
        return {
          partialMatch: true
          // matchedChars: ...
        };
      }
      // Not even a partial match.
      return;
    case '[]':
      for (var _iterator2 = _createForOfIteratorHelperLoose(tree.args), _step2; !(_step2 = _iterator2()).done;) {
        var _char = _step2.value;
        if (characters[0] === _char) {
          if (characters.length === 1) {
            return {
              match: true,
              matchedChars: characters
            };
          }
          if (last) {
            return {
              overflow: true
            };
          }
          return {
            match: true,
            matchedChars: [_char]
          };
        }
      }
      // No character matches.
      return;

    /* istanbul ignore next */
    default:
      throw new Error("Unsupported instruction tree: ".concat(tree));
  }
}

export { PatternMatcher as default };
//# sourceMappingURL=AsYouTypeFormatter.PatternMatcher.js.map
