package jPDFWebSamples.cli;

import java.io.IOException;

import com.qoppa.pdf.PDFException;
import com.qoppa.pdfWeb.PDFWeb;
import com.qoppa.pdfWeb.SVGOptions;

/**
 * Sample CLI implemenation of jPDFWeb.  This simple CLI will take an input PDF file and convert it to an SVG output file.  The sample
 * can take an optional page index to convert a snigle page.  The sample can be enhanced to add other options.
 * 
 * @author Qoppa Software
 *
 */
public class PDFWebCLI
{
	public static void main(String[] args)
	{
		try
		{
			// Parse the arguments
			JobInfo jobInfo = parseArgs(args);
			jobInfo.validate();

			// Check for the key
			if (jobInfo.mLicenseKey != null)
			{
				PDFWeb.setKey(jobInfo.mLicenseKey);
			}
			
			// load the document
			PDFWeb pdfweb = new PDFWeb(jobInfo.mInputFile, null);
			
			// Create SVGOptions
			SVGOptions options = new SVGOptions();
			// Options can be modified here by adding command line arguments

			// Perform conversion
			if (jobInfo.mPageIndex != -1)
			{
				pdfweb.savePageAsSVG(jobInfo.mPageIndex, options, jobInfo.mOutputFile);
			}
			else
			{
				pdfweb.saveDocumentAsSVG(jobInfo.mOutputFile, options);
			}
		}
		catch(CLIException cliE)
		{
			cliE.printStackTrace();
		}
		catch (PDFException e)
		{
			e.printStackTrace();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
	
	private static JobInfo parseArgs(String[] args) throws CLIException
	{
		if (args.length < 2)
		{
			printUsage();
			System.exit(0);
		}

		// Create new job info
		JobInfo jobInfo = new JobInfo();

		// Loop through the arguments
		int ix = 0;
		while (ix < args.length)
		{
			if ("-input".equalsIgnoreCase(args[ix]))
			{
				if (args.length <= ix+1)
					throw new CLIException("Not enough arguments");
				jobInfo.mInputFile = args[ix+1];
				ix += 2;
			}
			else if ("-output".equalsIgnoreCase(args[ix]))
			{
				jobInfo.mOutputFile = args[ix+1];
				ix += 2;
			}
			else if ("-lickey".equalsIgnoreCase(args[ix]))
			{
				jobInfo.mLicenseKey = args[ix+1];
				ix += 2;
			}
			else if ("-pageix".equalsIgnoreCase(args[ix]))
			{
				jobInfo.mPageIndex = Integer.parseInt(args[ix+1]);
				ix += 2;
			}
			else
			{
				throw new CLIException("Unrecognized command line option: " + args[ix]);
			}
		}

		return jobInfo;
	}

	private static void printUsage()
	{
		System.out.println("Usage: PDFWebCLI -input <filename> -output <filename> -lickey <key>");
		System.out.println();
		System.out.println("Required arguments:");
		System.out.println("-input <filename>           Input file name.");
		System.out.println("-output <filename>          Output file name.");
		System.out.println();
		System.out.println("-pageix <page index>        Page index (0 based) to convert a single page.");
		System.out.println("-lickey <key>               License key to run in production mode");
	}
}