content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to you 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.apache.calcite.util.format.postgresql.format.compiled;
  
  import org.apache.calcite.util.format.postgresql.ChronoUnitEnum;
  import org.apache.calcite.util.format.postgresql.PatternModifier;
  
  import java.text.ParseException;
  import java.text.ParsePosition;
  import java.time.ZonedDateTime;
  import java.util.Locale;
  import java.util.Set;
  
  import static java.lang.Integer.parseInt;
  
  /**
   * The date/time format compiled component for the year formatted with a comma after
   * the thousands (such as "2,024").
   */
  public class YearWithCommasCompiledPattern extends CompiledPattern {
    public YearWithCommasCompiledPattern(Set<PatternModifier> modifiers) {
      super(ChronoUnitEnum.YEARS, modifiers);
    }
  
    @Override public String convertToString(ZonedDateTime dateTime, Locale locale) {
      String formattedValue = String.format(Locale.ROOT, "%04d", dateTime.getYear());
      formattedValue = formattedValue.substring(0, formattedValue.length() - 3) + ","
          + formattedValue.substring(formattedValue.length() - 3);
  
      if (modifiers.contains(PatternModifier.TH_UPPER)
          || modifiers.contains(PatternModifier.TH_LOWER)) {
        String suffix;
        switch (formattedValue.charAt(formattedValue.length() - 1)) {
        case '1':
          suffix = "st";
          break;
        case '2':
          suffix = "nd";
          break;
        case 3:
          suffix = "rd";
          break;
        default:
          suffix = "th";
          break;
        }
  
        if (modifiers.contains(PatternModifier.TH_UPPER)) {
          return formattedValue + suffix.toUpperCase(Locale.ROOT);
        }
  
        return formattedValue + suffix;
      }
  
      return formattedValue;
    }
  
    @Override public int parseValue(ParsePosition inputPosition, String input, boolean enforceLength,
        Locale locale) throws ParseException {
      final String inputTrimmed = input.substring(inputPosition.getIndex());
      final int commaIndex = inputTrimmed.indexOf(',');
  
      if (commaIndex <= 0 || commaIndex > 3) {
        throw new ParseException("Unable to parse value", inputPosition.getIndex());
      }
  
      final String thousands = inputTrimmed.substring(0, commaIndex);
      int endIndex;
      if (enforceLength) {
        if (inputPosition.getIndex() + commaIndex + 4 > input.length()) {
          throw new ParseException("Unable to parse value", inputPosition.getIndex());
        }
  
        endIndex = commaIndex + 4;
      } else {
        endIndex = commaIndex + 1;
        for (; endIndex < inputTrimmed.length(); endIndex++) {
          if (!Character.isDigit(inputTrimmed.charAt(endIndex))) {
            break;
          }
        }
  
        if (endIndex == commaIndex + 1 || endIndex > commaIndex + 4) {
          inputPosition.setErrorIndex(inputPosition.getIndex());
          throw new ParseException("Unable to parse value", inputPosition.getIndex());
        }
      }
  
      final String remainingDigits = inputTrimmed.substring(commaIndex + 1, endIndex);
  
      if (modifiers.contains(PatternModifier.TH_UPPER)
          || modifiers.contains(PatternModifier.TH_LOWER)) {
        if (endIndex < inputTrimmed.length() - 1) {
          endIndex += 2;
        } else if (endIndex < inputTrimmed.length()) {
          endIndex++;
        }
      }
  
      inputPosition.setIndex(inputPosition.getIndex() + endIndex);
  
      return parseInt(thousands) * 1000 + parseInt(remainingDigits);
    }
  
    @Override protected int getBaseFormatPatternLength() {
      return 5;
    }
  
    @Override public boolean isNumeric() {
      return true;
    }
  }
  