/**
    * Copyright 2010-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.common.util.execute;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  import org.apache.commons.io.FileUtils;
  import org.kuali.common.util.LocationUtils;
  import org.springframework.util.Assert;
  
  public class ConvertTableListingTextFileExecutable implements Executable {
  
  	private static String SQL = "sql";
  	private static String METAINF = "META-INF";
  
  	List<String> vendors = Arrays.asList("mysql", "oracle");
  	String suffix = SQL;
  	String prefix = SQL;
  	String artifactId;
  	File outputDir;
  	boolean skip;
  
  	@Override
  	public void execute() {
  		Assert.notNull(artifactId, "artifactId is null");
  		Assert.notNull(vendors, "vendors is null");
  		Assert.notNull(suffix, "suffix is null");
  		Assert.notNull(prefix, "prefix is null");
  		Assert.notNull(outputDir, "outputDir is null");
  
  		for (String vendor : vendors) {
  			String tableListing = SQL + "/" + vendor + "/" + artifactId + "-tables.txt";
  			List<String> tableNames = LocationUtils.readLines(tableListing);
  			List<String> resources = getResources(tableNames, vendor, prefix, suffix);
  			validateResources(resources);
  			File outputFile = getOutputFile(outputDir, prefix, vendor, artifactId);
  			writeLines(outputFile, resources);
  		}
  	}
  
  	protected void validateResources(List<String> resources) {
  		for (String resource : resources) {
  			Assert.isTrue(LocationUtils.exists(resource), "[" + resource + "] does not exist");
  		}
  	}
  
  	protected void writeLines(File file, List<String> lines) {
  		try {
  			FileUtils.writeLines(file, lines, "\n");
  		} catch (IOException e) {
  			throw new IllegalArgumentException(e);
  		}
  	}
  
  	protected File getOutputFile(File outputDir, String prefix, String vendor, String artifactId) {
  		String filename = METAINF + "/" + prefix + "/" + vendor + "/" + artifactId + "-data.resources";
  		return new File(outputDir, filename);
  
  	}
  
  	protected List<String> getResources(List<String> tableNames, String vendor, String prefix, String suffix) {
  		List<String> resources = new ArrayList<String>();
  		for (String tableName : tableNames) {
  			String resource = "classpath:" + prefix + "/" + vendor + "/" + tableName + "." + suffix;
  			resources.add(resource);
  		}
  		return resources;
  	}
  
  	public List<String> getVendors() {
  		return vendors;
  	}
  
  	public void setVendors(List<String> vendors) {
  		this.vendors = vendors;
  	}
  
  	public String getSuffix() {
  		return suffix;
  	}
  
  	public void setSuffix(String suffix) {
 		this.suffix = suffix;
 	}
 
 	public String getPrefix() {
 		return prefix;
 	}
 
 	public void setPrefix(String prefix) {
 		this.prefix = prefix;
 	}
 
 	public String getArtifactId() {
 		return artifactId;
 	}
 
 	public void setArtifactId(String artifactId) {
 		this.artifactId = artifactId;
 	}
 
 	public File getOutputDir() {
 		return outputDir;
 	}
 
 	public void setOutputDir(File outputDir) {
 		this.outputDir = outputDir;
 	}
 
 	public boolean isSkip() {
 		return skip;
 	}
 
 	public void setSkip(boolean skip) {
 		this.skip = skip;
 	}
 
 }