/*
    *    Copyright 2010-2023 the original author or authors.
    *
    *    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
    *
    *       https://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.ibatis.migration.utils;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.util.Properties;
  
  public enum Util {
    ;
  
    private static final String MIGRATIONS_HOME = "MIGRATIONS_HOME";
  
    /* TODO: remove in the next major release */
    private static final String MIGRATIONS_HOME_PROPERTY_DEPRECATED = "migrationHome";
  
    private static final String MIGRATIONS_HOME_PROPERTY = "migrationsHome";
  
    private static final String MIGRATIONS_PROPERTIES = "migration.properties";
  
    public static String migrationsHome() {
      String migrationsHome = System.getenv(MIGRATIONS_HOME);
      // Check if there is a system property
      if (migrationsHome == null) {
        migrationsHome = System.getProperty(MIGRATIONS_HOME_PROPERTY);
        if (migrationsHome == null) {
          migrationsHome = System.getProperty(MIGRATIONS_HOME_PROPERTY_DEPRECATED);
        }
      }
      return migrationsHome;
    }
  
    public static boolean getPropertyOptionAsBoolean(String key) {
      return Boolean.parseBoolean(getPropertyOption(key));
    }
  
    /**
     * @param key
     *          of the property.
     *
     * @return The value <code>null</code> if the property file does not exist or the <code>key</code> does not exist.
     */
    public static String getPropertyOption(String key) {
      String migrationsHome = migrationsHome();
      if (migrationsHome == null || migrationsHome.isEmpty()) {
        return null;
      }
      Properties properties = new Properties();
      String path = migrationsHome + File.separator + MIGRATIONS_PROPERTIES;
      try (FileInputStream stream = new FileInputStream(path)) {
        properties.load(stream);
        return properties.getProperty(key);
      } catch (Exception e) {
        return null;
      }
    }
  
    public static boolean isOption(String arg) {
      return arg.startsWith("--") && !arg.trim().endsWith("=");
    }
  
    public static File file(File path, String fileName) {
      return new File(path.getAbsolutePath() + File.separator + fileName);
    }
  
    public static String horizontalLine(String caption, int length) {
      StringBuilder builder = new StringBuilder();
      builder.append("==========");
      if (caption.length() > 0) {
        caption = " " + caption + " ";
        builder.append(caption);
      }
      for (int i = 0; i < length - caption.length() - 10; i++) {
        builder.append("=");
      }
      return builder.toString();
    }
  }