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/*
 * Copyright 2001-2018 Artima, Inc.
 *
 * 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 org.scalactic

private[org] object NameUtil {

  // This attempts to strip dollar signs that happen when using the interpreter. It is quite fragile
  // and already broke once. In the early days, all funky dollar sign encrusted names coming out of
  // the interpreter started with "line". Now they don't, but in both cases they seemed to have at
  // least one "$iw$" in them. So now I leave the string alone unless I see a "$iw$" in it. Worst case
  // is sometimes people will get ugly strings coming out of the interpreter. -bv April 3, 2012
  def stripDollars(s: String): String = {
    val lastDollarIndex = s.lastIndexOf('$')
    if (lastDollarIndex < s.length - 1)
      if (lastDollarIndex == -1 || !s.contains("$iw$")) s else s.substring(lastDollarIndex + 1)
    else {
      // The last char is a dollar sign
      val lastNonDollarChar = s.reverse.find(_ != '$')
      lastNonDollarChar match {
        case None => s
        case Some(c) => {
          val lastNonDollarIndex = s.lastIndexOf(c)
          if (lastNonDollarIndex == -1) s
          else stripDollars(s.substring(0, lastNonDollarIndex + 1))
        }
      }
    }
  }

  def getSimpleNameOfAnObjectsClass(o: AnyRef) = stripDollars(parseSimpleName(o.getClass.getName))

  // [bv: this is a good example of the expression type refactor. I moved this from SuiteClassNameListCellRenderer]
  // this will be needed by the GUI classes, etc.
  def parseSimpleName(fullyQualifiedName: String) = {

    val dotPos = fullyQualifiedName.lastIndexOf('.')

    // [bv: need to check the dotPos != fullyQualifiedName.length]
    if (dotPos != -1 && dotPos != fullyQualifiedName.length)
      fullyQualifiedName.substring(dotPos + 1)
    else
      fullyQualifiedName
  }

}