/*
    *    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.commands;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.PrintStream;
  import java.nio.charset.Charset;
  import java.util.Locale;
  import java.util.Properties;
  
  public final class InfoCommand implements Command {
    private final PrintStream out;
  
    public InfoCommand(PrintStream out) {
      this.out = out;
    }
  
    @Override
    public void execute(String... params) {
      Properties properties = new Properties();
      try (InputStream is = getClass().getResourceAsStream("/mybatis-migrations.properties")) {
        if (is != null) {
          properties.load(is);
        }
      } catch (IOException e) {
        // ignore
      }
  
      out.printf("%s %s (%s)%n", properties.getProperty("name"), properties.getProperty("version"),
          properties.getProperty("build"));
      out.printf("Java version: %s, vendor: %s%n", System.getProperty("java.version"), System.getProperty("java.vendor"));
      out.printf("Java home: %s%n", System.getProperty("java.home"));
      out.printf("Default locale: %s, platform encoding: %s%n", Locale.getDefault().toLanguageTag(),
          Charset.defaultCharset().name());
      out.printf("OS name: \"%s\", version: \"%s\", arch: \"%s\", family: \"%s\"%n", System.getProperty("os.name"),
          System.getProperty("os.version"), System.getProperty("os.arch"), getOsFamily());
    }
  
    private static String getOsFamily() {
      String osName = System.getProperty("os.name").toLowerCase();
      String pathSep = File.pathSeparator;
  
      if (osName.indexOf("windows") != -1) {
        return "windows";
      }
  
      if (osName.indexOf("os/2") != -1) {
        return "os/2";
      }
  
      if (osName.indexOf("z/os") != -1 || osName.indexOf("os/390") != -1) {
        return "z/os";
      }
  
      if (osName.indexOf("os/400") != -1) {
        return "os/400";
      }
  
      if (pathSep.equals(";")) {
        return "dos";
      }
  
      if (osName.indexOf("mac") != -1) {
        if (osName.endsWith("x")) {
          return "mac"; // MACOSX
        }
        return "unix";
      }
  
      if (osName.indexOf("nonstop_kernel") != -1) {
        return "tandem";
      }
  
      if (osName.indexOf("openvms") != -1) {
        return "openvms";
      }
  
      if (pathSep.equals(":")) {
        return "unix";
      }
  
      return "undefined";
    }
  
 }