/*
    *    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.hook;
  
  import java.io.File;
  import java.io.PrintStream;
  import java.util.Arrays;
  import java.util.Properties;
  
  import org.apache.ibatis.migration.Environment;
  import org.apache.ibatis.migration.MigrationException;
  import org.apache.ibatis.migration.options.SelectedPaths;
  
  public class FileHookScriptFactory implements HookScriptFactory {
  
    protected final SelectedPaths paths;
    protected final Environment environment;
    protected final PrintStream printStream;
  
    public FileHookScriptFactory(SelectedPaths paths, Environment environment, PrintStream printStream) {
      this.paths = paths;
      this.environment = environment;
      this.printStream = printStream;
    }
  
    @Override
    public HookScript create(String hookSetting) {
      if (hookSetting == null) {
        return null;
      }
      File hooksDir = paths.getHookPath();
      if (hooksDir == null) {
        throw new MigrationException("Hooks directory must not be null.");
      }
      if (!hooksDir.exists()) {
        throw new MigrationException("Hooks directory not found : " + hooksDir.getAbsolutePath());
      }
      String[] segments = hookSetting.split(":");
      if (segments.length < 2) {
        throw new MigrationException(
            "Error creating a HookScript. Hook setting must contain 'language' and 'file name' separated by ':' (e.g. SQL:post-up.sql).");
      }
      String charset = environment.getScriptCharset();
      Properties variables = environment.getVariables();
      // First segment is language
      String scriptLang = segments[0];
      // Second segment is file
      File scriptFile = new File(hooksDir, segments[1]);
      // The rest are script dependent options
      String[] hookOptions = Arrays.copyOfRange(segments, 2, segments.length);
      if (!scriptFile.exists()) {
        throw new MigrationException("Hook script not found : " + scriptFile.getAbsolutePath());
      }
      if ("sql".equalsIgnoreCase(scriptLang)) {
        return new SqlHookScript(scriptFile, charset, hookOptions, variables, printStream);
      }
      // Assuming it's JSR-223.
      return new Jsr223HookScript(scriptLang, scriptFile, charset, hookOptions, paths, variables, printStream);
    }
  }