/*
 * Copyright (c) 2020, Xiaomi and/or its affiliates. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.xiaomi.duckling.dimension.multichar

import com.vdurmont.emoji.EmojiParser

import com.xiaomi.duckling.Types._
import com.xiaomi.duckling.dimension.DimRules
import com.xiaomi.duckling.dimension.implicits._
import com.xiaomi.duckling.dimension.matcher.{MultiCharMatch, MultiCharMatches}

trait Rules extends DimRules {
  val rule = Rule(
    name = "multi-char symbol", //
    pattern = List(ItemMultiChar),
    prod = tokens {
      case Token(MultiCharMatch, MultiCharMatches(text)) :: _ =>
        val _alias = EmojiParser.parseToAliases(text)
        val alias = if (_alias == text) None else Some(_alias)
        token(text, alias.nonEmpty, alias)
    }
  )
}
