/**
 *
 * Copyright 2006 The Apache Software Foundation or its licensors as applicable
 *
 *  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
 *
 *     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.tuscany.tools.xmlfromxsd.generate;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

import org.apache.ws.java2wsdl.Java2WSDLUtils;

/**
 * This class encapsulates the configuration settings for the "XML From XSD" generation.  
 * Presently it contains settings like the XSD to be use, the schematype for which and
 * xml instance is to be created, the destination for the output etc.  All of these 
 * settings are used by the 'generator' classes during the genation of the xml instance.
 *
 */
public class XMLfromXSDConfiguration implements CmdLineArgsHandler
{
	private static int fileCount = 0;
	public static final String DEFAULT_XML_OUTPUT_FILENAME = "XML_FROM_XSD_" + (++fileCount) + ".xml";
	
	public static final String XSD_FILE_URL_OPTION = "xsd";
	public static final String XML_OUTPUT_LOCATION_OPTION = "o";
	public static final String XML_OUTPUT_FILENAME_OPTION = "of";
	public static final String ROOT_ELEMENT_NAMESPACE_URI_OPTION = "rns";
	public static final String ROOT_ELEMENT_LOCALNAME_OPTION = "rn";
	public static final String SCHEMA_TYPE_NAME = "st";
	public static final String SCHEMA_TYPE_NAMESPACE_URI = "stn";
	public static final String GENERATE_SAMPLE_DATA = "sd";
	
	protected String xmlOutputLocation = null;
	protected File xmlOutputDirectory = null;
	protected String xsdFileName = null;
	protected String xmlFileName = null;
	protected InputStream xsdInputStream = null;
	protected OutputStream xmlOutputStream = null;
	protected String rootElementNamespaceURI = null;
	protected String rootElementLocalName = null;
	protected String schemaTypeName = null;
	protected String schemaTypeNamespaceURI = null;
	protected boolean generateSampleData = false;
	
	private void handleXSDInputFileOption(String xsdFileUrl) throws Exception
	{
		xsdFileName = xsdFileUrl;
		//xsdInputStream = new FileInputStream(new File(xsdFileName));
		URL resourceUrl = Thread.currentThread().getContextClassLoader().getResource(xsdFileName);
		if ( resourceUrl != null )
		{
			xsdInputStream = resourceUrl.openStream();
		}
		else
		{
			File inFile = new File(xsdFileName);
			xsdFileName = inFile.getName();
			xsdInputStream = new FileInputStream(inFile);
		}
	}
	
	private void handleXMLOutputLocationOption(String outputLocation) throws Exception
	{
		xmlOutputLocation = outputLocation;
		xmlOutputDirectory = new File(xmlOutputLocation);
        if (!xmlOutputDirectory.exists()) 
        {
        	xmlOutputDirectory.mkdirs();
        } 
        else if (!xmlOutputDirectory.isDirectory()) 
        {
            throw new IllegalArgumentException("The input location for the xml output " + outputLocation + "is not a folder");
        }
	}
	
	private void handleOutputFilenameOption(String outputFileName) throws Exception 
	{
		xmlFileName = outputFileName;

        //first create a file in the given location
        File outputFile = new File(xmlOutputDirectory, xmlFileName);
        
        try {
            if (!outputFile.exists()) {
                outputFile.createNewFile();
            }
            xmlOutputStream = new FileOutputStream(outputFile);
        } catch (IOException e) {
            throw new Exception(e);
        }
	}
	
	public void handleArgument(String optionFlag, String argValue) throws IllegalArgumentException
	{
		try
		{
			if ( XSD_FILE_URL_OPTION.equalsIgnoreCase(optionFlag) )
			{
				handleXSDInputFileOption(argValue);
			}
			else if ( XML_OUTPUT_LOCATION_OPTION.equalsIgnoreCase(optionFlag) )
			{
				handleXMLOutputLocationOption(argValue);
			}
			else if ( XML_OUTPUT_FILENAME_OPTION.equalsIgnoreCase(optionFlag) )
			{
				handleOutputFilenameOption(argValue);
			}
			else if ( ROOT_ELEMENT_NAMESPACE_URI_OPTION.equalsIgnoreCase(optionFlag) )
			{
				setRootElementNamespaceURI(argValue);
			}
			else if ( ROOT_ELEMENT_LOCALNAME_OPTION.equalsIgnoreCase(optionFlag) )
			{
				setRootElementLocalName(argValue);
			}
			else if ( SCHEMA_TYPE_NAME.equalsIgnoreCase(optionFlag) )
			{
				setSchemaTypeName(argValue);
			}
			else if ( SCHEMA_TYPE_NAMESPACE_URI.equalsIgnoreCase(optionFlag) )
			{
				setSchemaTypeNamespaceURI(argValue);
			}
			else if ( GENERATE_SAMPLE_DATA.equalsIgnoreCase(optionFlag) )
			{
				setGenerateSampleData(true);
			}
		}
		catch ( Exception e )
		{
			throw new IllegalArgumentException("Exception due to - " + e);
		}
	}

	public String getRootElementLocalName()
	{
		if ( rootElementLocalName == null )
		{
			rootElementLocalName = schemaTypeName.toLowerCase();
		}
		return rootElementLocalName;
	}

	public void setRootElementLocalName(String rootElementLocalName)
	{
		this.rootElementLocalName = rootElementLocalName;
	}

	public String getRootElementNamespaceURI()
	{
		if ( rootElementNamespaceURI == null )
		{
			rootElementNamespaceURI = schemaTypeNamespaceURI;
		}
		return rootElementNamespaceURI;
	}

	public void setRootElementNamespaceURI(String rootElementNamespaceURI)
	{
		this.rootElementNamespaceURI = rootElementNamespaceURI;
	}

	public String getXmlFileName()
	{
		if ( xmlFileName == null )
		{
			xmlFileName = getXsdFileName() + ".xml";
		}
		return xmlFileName;
	}

	public void setXmlFileName(String xmlFileName)
	{
		this.xmlFileName = xmlFileName;
	}

	public File getXmlOutputLocation()
	{
		return xmlOutputDirectory;
	}

	public void setXmlOutputLocation(File xmlOutputLocation)
	{
		this.xmlOutputDirectory = xmlOutputLocation;
	}

	public OutputStream getXmlOutputStream() throws Exception
	{
		if ( xmlOutputStream == null )
		{
			if ( xmlOutputDirectory == null )
			{
				handleXMLOutputLocationOption(System.getProperty("user.dir"));
			}
			handleOutputFilenameOption(getXmlFileName());
		}
		return xmlOutputStream;
	}

	public void setXmlOutputStream(OutputStream xmlOutputStream)
	{
		this.xmlOutputStream = xmlOutputStream;
	}

	public String getXsdFileName()
	{
		return xsdFileName;
	}

	public void setXsdFileName(String xsdFileName) throws Exception
	{
		this.xsdFileName = xsdFileName;
		handleXSDInputFileOption(xsdFileName);
	}

	public InputStream getXsdInputStream() throws Exception
	{
		if ( xsdInputStream == null )
		{
			throw new IllegalArgumentException("XSD Input Source not set....!");
		}
		return xsdInputStream;
	}

	public void setXsdInputStream(InputStream xsdInputStream)
	{
		this.xsdInputStream = xsdInputStream;
	}

	public String getSchemaTypeName()
	{
		return schemaTypeName;
	}

	public void setSchemaTypeName(String schemaTypeName)
	{
		this.schemaTypeName = schemaTypeName;
	}
	
	public String getSchemaTypeNamespaceURI()
	{
		return schemaTypeNamespaceURI;
	}

	public void setSchemaTypeNamespaceURI(String schemaTypeNamespaceURI)
	{
		this.schemaTypeNamespaceURI = schemaTypeNamespaceURI;
	}

	public void setXmlOutputLocation(String xmlOutputLocation) throws Exception
	{
		this.xmlOutputLocation = xmlOutputLocation;
		handleXMLOutputLocationOption(xmlOutputLocation);
	}

	public boolean isGenerateSampleData()
	{
		return generateSampleData;
	}

	public void setGenerateSampleData(boolean generateSampleData)
	{
		this.generateSampleData = generateSampleData;
	}
	
}