/*
 * Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
 * For details on use and redistribution please refer to the
 * LICENSE file included with these sources."
 */


package org.apache.fop.apps;

//java
import java.util.Vector;
import java.io.File;
import java.io.FileNotFoundException;

// FOP
import org.apache.fop.messaging.MessageHandler;
import org.apache.fop.configuration.Configuration;
import org.apache.fop.apps.FOPException;

/**
 *	Options parses the commandline arguments
 */

public class CommandLineOptions {

    /* input / output not set */
    private static final int NOT_SET = 0;
    /* input: fo file  */
    private static final int FO_INPUT = 1;
    /* input: xml+xsl file  */
    private static final int XSLT_INPUT = 2;
    /* output: pdf file  */
    private static final int PDF_OUTPUT = 1;
    /* output: screen using swing  */
    private static final int AWT_OUTPUT = 2;
    /* output: mif file  */
    private static final int MIF_OUTPUT = 3;
    /* output: sent swing rendered file to printer  */
    private static final int PRINT_OUTPUT = 4;
    /* output: pcl file  */
    private static final int PCL_OUTPUT = 5;
    /* output: text file  */
    private static final int TXT_OUTPUT = 6;

	/* System buffers */
	private static final int BUFFER_FILE = 7;
	
	/* System buffers */
	private static final int AREA_OUTPUT = 8;
	
    /* use debug mode*/
    Boolean errorDump = new Boolean(false);
    /* show configuration information */
    Boolean dumpConfiguration = new Boolean(false);
    /*suppress any progress information */
    Boolean quiet = new Boolean(false);
	/* for area tree XML output, only down to block area level */
	Boolean suppressLowLevelAreas = new Boolean(false);
    /* name of user configuration file*/
    File userConfigFile = null;
    /* name of input fo file  */
    File fofile = null;
    /*  name of xsltfile (xslt transformation as input)*/
    File xsltfile = null;
    /*  name of xml file (xslt transformation as input)*/
    File xmlfile = null;
    /* name of output file  */
    File outfile = null;
    /* name of buffer file */
    File bufferFile = null;
    /* input mode */
    int inputmode = NOT_SET;
    /*output mode */
    int outputmode = NOT_SET;
    /* buffer mode */
    int buffermode = NOT_SET;
    /* language for user information */
    String language = null;

	private java.util.Hashtable rendererOptions;
	
    public CommandLineOptions (String [] args) 
	throws FOPException, FileNotFoundException
    {
	boolean optionsParsed = true;
	rendererOptions = new java.util.Hashtable();
	try {
	    optionsParsed = parseOptions(args);
	    if (optionsParsed) {
		checkSettings ();
		if (errorDump != null && errorDump.booleanValue()) {
		    debug();
		}
	    }
	}
	catch (FOPException e) {
	    printUsage();
	    throw e;
	}
	catch (java.io.FileNotFoundException e) {
	    printUsage();
	    throw e;
	}
       
    }
    

    /**
     *  parses the commandline arguments
     * @return true if parse was successful and procesing can continue, false if processing should stop
     * @exception FOPException if there was an error in the format of the options
     */
    private boolean parseOptions (String args[]) 
	throws FOPException
    {
        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-d") || args[i].equals("--full-error-dump")) {
                errorDump = new Boolean(true);
            } else if (args[i].equals("-x") || args[i].equals("--dump-config")) {
                dumpConfiguration = new Boolean(true);
            } else if (args[i].equals("-q") || args[i].equals("--quiet")) {
                quiet = new Boolean(true);
            } else if (args[i].equals("-c")) {
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
		    throw new FOPException("if you use '-c', you must specify the name of the configuration file");
                } else {
                    userConfigFile = new File (args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-l")) {
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("if you use '-l', you must specify a language");
                } else {
                    language = args[i + 1];
                    i++;
                }
            } else if (args[i].equals("-s")) {
                suppressLowLevelAreas = new Boolean(true);
            }  else if (args[i].equals("-fo")) {
                inputmode = FO_INPUT;
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("you must specify the fo file for the '-fo' option");
                } else {
                    fofile = new File (args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-xsl")) {
                inputmode = XSLT_INPUT;
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("you must specify the stylesheet file for the '-xsl' option");
                } else {
                    xsltfile = new File(args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-xml")) {
                inputmode = XSLT_INPUT;
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("you must specify the input file for the '-xml' option");
                } else {
                    xmlfile = new File(args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-awt")) {
		setOutputMode(AWT_OUTPUT);
	    } else if (args[i].equals("-pdf")) {
		setOutputMode(PDF_OUTPUT);
		if ((i + 1 == args.length) ||
		    (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("you must specify the pdf output file");
                } else {
                    outfile = new File (args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-mif")) {
		setOutputMode(MIF_OUTPUT);
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                     throw new FOPException("you must specify the mif output file");
                } else {
                    outfile = new File(args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-print")) {
		setOutputMode(PRINT_OUTPUT);
                //show print help
                if (i + 1 < args.length) {
                    if (args[i + 1].equals("help")) {
                        printUsagePrintOutput();
			return false;
		    }
                }
            } else if (args[i].equals("-pcl")) {
		setOutputMode(PCL_OUTPUT);
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("you must specify the pdf output file");
                } else {
                    outfile = new File (args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-txt")) {
		setOutputMode(TXT_OUTPUT);
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("you must specify the text output file");
                } else {
                    outfile = new File (args[i + 1]);
                    i++;
                }
            } else if (args[i].charAt(0) != '-') {
                if (inputmode == NOT_SET) {
                    inputmode = FO_INPUT;
                    fofile = new File (args[i]);
                } else if (outputmode == NOT_SET) {
                    outputmode = PDF_OUTPUT;
                    outfile = new File(args[i]);
                } else {
                    throw new FOPException("Don't know what to do with " + args[i]);
                }
            }	else if (args[i].equals("-buf")) {
                if (buffermode == NOT_SET) {
                    buffermode = BUFFER_FILE;
                } else {
                    MessageHandler.errorln("ERROR: you can only set one buffer method");
                    printUsage();
                }
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    MessageHandler.errorln("ERROR: you must specify the buffer output file");
                    printUsage();
                } else {
                    bufferFile = new File (args[i + 1]);
                    i++;
                }
            } else if (args[i].equals("-at")) {
		setOutputMode(AREA_OUTPUT);
                if ((i + 1 == args.length) ||
                        (args[i + 1].charAt(0) == '-')) {
                    throw new FOPException("you must specify the area-tree output file");
                } else {
                    outfile = new File (args[i + 1]);
                    i++;
                }
            } else {
                printUsage();
		return false;
	    }
        }
	return true;
    } //end parseOptions

    private void setOutputMode(int mode) 
	throws FOPException
    {
	if (outputmode == NOT_SET) {
	    outputmode = mode;
	} else {
	    throw new FOPException("you can only set one output method");
	}
    }
    

    /**
     * checks whether all necessary information has been given in a consistent way
     */
    private void checkSettings ()
	throws FOPException, FileNotFoundException
    {
        if (inputmode == NOT_SET) {
	    throw new FOPException("No input file specified");
	}

        if (outputmode == NOT_SET) {
	    throw new FOPException("No output file specified");
	}

        if (inputmode == XSLT_INPUT) {
            //check whether xml *and* xslt file have been set
	    if (xmlfile == null) {
		throw new FOPException("XML file must be specified for the tranform mode");
	    }
	    if (xsltfile == null) {
		throw new FOPException("XSLT file must be specified for the tranform mode");
	    }

            //warning if fofile has been set in xslt mode
            if (fofile != null) {
                MessageHandler.errorln(
                  "WARNING: Can't use fo file with transform mode! Ignoring.\n" +
                  "Your input is "+
		  "\n xmlfile: " + xmlfile.getAbsolutePath() + 
		  "\nxsltfile: " + xsltfile.getAbsolutePath() + 
		  "\n  fofile: " + fofile.getAbsolutePath());
            }
            if (!xmlfile.exists()) {
		throw new FileNotFoundException("xml file " +
						xmlfile.getAbsolutePath() + " not found ");
            }
            if (!xsltfile.exists()) {
                throw new FileNotFoundException("xsl file " +
                                       xsltfile.getAbsolutePath() + " not found ");
            }

        } else if (inputmode == FO_INPUT) {
            if (xmlfile != null || xsltfile != null) {
                MessageHandler.errorln("WARNING: fo input mode, but xmlfile or xslt file are set:");
                MessageHandler.errorln("xml file: " + xmlfile.toString());
                MessageHandler.errorln("xslt file: " + xsltfile.toString());
            }
            if (!fofile.exists()) {
                 throw new FileNotFoundException("fo file " +
                                       fofile.getAbsolutePath() + " not found ");
            }

        }
    }// end checkSettings


    /**
     *  returns the chosen renderer, throws FOPException
     */
    public int getRenderer () throws FOPException {
        switch (outputmode) {
            case NOT_SET:
                throw new FOPException("Renderer has not been set!");
            case PDF_OUTPUT:
                return Driver.RENDER_PDF;
            case AWT_OUTPUT:
                return Driver.RENDER_AWT;
            case MIF_OUTPUT:
                return Driver.RENDER_MIF;
            case PRINT_OUTPUT:
                return Driver.RENDER_PRINT;
            case PCL_OUTPUT:
                return Driver.RENDER_PCL;
            case TXT_OUTPUT:
                return Driver.RENDER_TXT;
			case AREA_OUTPUT:
				rendererOptions.put("fineDetail", isCoarseAreaXml());
				return Driver.RENDER_XML;
            default:
                throw new FOPException("Invalid Renderer setting!");
        }
    }

    /**
       *
       **/
    public InputHandler getInputHandler () {
        switch (inputmode) {
            case FO_INPUT:
                return new FOInputHandler(fofile);
            case XSLT_INPUT:
                return new XSLTInputHandler(xmlfile, xsltfile);
            default:
                return new FOInputHandler(fofile);
        }
    }

	public java.util.Hashtable getRendererOptions() {
		return rendererOptions;
	}
	
    public Starter getStarter() 
	throws FOPException
    {
        switch (outputmode) {
            case PDF_OUTPUT:
                return new CommandLineStarter(this);
            case AWT_OUTPUT:
                try {
                    return((Starter) Class.forName(
                             "org.apache.fop.apps.AWTStarter").
                           getConstructor(
                             new Class[]{CommandLineOptions.class}).
                           newInstance(new Object[]{this}));
                } catch (Exception e) {
		    if (e instanceof FOPException) {
			throw (FOPException)e;
		    }
		    throw new FOPException("AWTStarter could not be loaded.",e);
                }
            case MIF_OUTPUT:
                return new CommandLineStarter(this);
            case PRINT_OUTPUT:
                try {
                    return((Starter) Class.forName(
                             "org.apache.fop.apps.PrintStarter").
                           getConstructor(
                             new Class[]{CommandLineOptions.class}).
                           newInstance(new Object[]{this}));
                } catch (Exception e) {
		    if (e instanceof FOPException) {
			throw (FOPException)e;
		    }
		    throw new FOPException("PrintStarter could not be loaded.",e);
                }

            case AREA_OUTPUT:
                return new CommandLineStarter(this);
            default:
                return new CommandLineStarter(this);
        }
    }

    public int getInputMode() {
        return inputmode;
    }

    public int getOutputMode() {
        return outputmode;
    }

    public File getFOFile() {
        return fofile;
    }

    public File getXMLFile() {
        return xmlfile;
    }

    public File getXSLFile() {
        return xsltfile;
    }

    public File getOutputFile() {
        return outfile;
    }

    public File getUserConfigFile () {
        return userConfigFile;
    }

    public String getLanguage() {
        return language;
    }

     public File getBufferFile() {
        		return bufferFile;
     }
     
    public Boolean isQuiet() {
        return quiet;
    }

    public Boolean dumpConfiguration() {
        return dumpConfiguration;
    }

    public Boolean isDebugMode() {
        return errorDump;
    }

	public Boolean isCoarseAreaXml() {
		return suppressLowLevelAreas;
	}
	
    /**
       * return either the fofile or the xmlfile
       */
    public File getInputFile() {
        switch (inputmode) {
            case FO_INPUT:
                return fofile;
            case XSLT_INPUT:
                return xmlfile;
            default:
                return fofile;
        }
    }


    /**
       *	 shows the commandline syntax including a summary of all available options and some examples
       */
    public static void printUsage() {
        MessageHandler.errorln(
          "\nUSAGE\nFop [options] [-fo|-xml] infile [-xsl file] [-awt|-pdf|-mif|-pcl|-txt|-at|-print] <outfile>\n" +
          " [OPTIONS]  \n" + "  -d          debug mode   \n" +
          "  -x          dump configuration settings  \n" +
          "  -q          quiet mode  \n" +
          "  -c cfg.xml  use additional configuration file cfg.xml\n" +
          "  -l lang     the language to use for user information \n" +
		  "  -s          for area tree XML, down to block areas only\n\n" +
          " [INPUT]  \n" +
          "  infile            xsl:fo input file (the same as the next) \n" +
          "  -fo  infile       xsl:fo input file  \n" +
          "  -xml infile       xml input file, must be used together with -xsl \n" +
          "  -xsl stylesheet   xslt stylesheet \n \n" +
          " [OUTPUT] \n" +
          "  outfile           input will be rendered as pdf file into outfile \n" +
          "  -pdf outfile      input will be rendered as pdf file (outfile req'd) \n" +
          "  -awt              input will be displayed on screen \n" +
          "  -mif outfile      input will be rendered as mif file (outfile req'd)\n" +
          "  -pcl outfile      input will be rendered as pcl file (outfile req'd) \n" +
          "  -txt outfile      input will be rendered as text file (outfile req'd) \n" +
          "  -at outfile       representation of area tree as XML (outfile req'd) \n" +
          "  -print            input file will be rendered and sent to the printer \n" +
          "                    see options with \"-print help\" \n\n" +
          " [Examples]\n" + "  Fop foo.fo foo.pdf \n" +
          "  Fop -fo foo.fo -pdf foo.pdf (does the same as the previous line)\n" +
          "  Fop -xsl foo.xsl -xml foo.xml -pdf foo.pdf\n" +
          "  Fop foo.fo -mif foo.mif\n" +
          "  Fop foo.fo -print or Fop -print foo.fo \n" + "  Fop foo.fo -awt \n");
    }

    /**
       *	shows the options for print output
       */
    public void printUsagePrintOutput() {
        MessageHandler.errorln(
          "USAGE: -print [-Dstart=i] [-Dend=i] [-Dcopies=i] [-Deven=true|false] " +
          " org.apache.fop.apps.Fop (..) -print \n" +
          "Example:\n" + "java -Dstart=1 -Dend=2 org.apache.Fop.apps.Fop infile.fo -print ");
    }


    /**
       * debug mode. outputs all commandline settings
       */
    private void debug () {
        System.out.print("Input mode: ");
        switch (inputmode) {
            case NOT_SET:
                MessageHandler.logln("not set");
                break;
            case FO_INPUT:
                MessageHandler.logln("FO ");
                MessageHandler.logln("fo input file: " + fofile.toString());
                break;
            case XSLT_INPUT:
                MessageHandler.logln("xslt transformation");
                MessageHandler.logln("xml input file: " +
                                     xmlfile.toString());
                MessageHandler.logln("xslt stylesheet: " +
                                     xsltfile.toString());
                break;
            default:
                MessageHandler.logln("unknown input type");
        }
        System.out.print("Output mode: ");
        switch (outputmode) {
            case NOT_SET:
                MessageHandler.logln("not set");
                break;
            case PDF_OUTPUT:
                MessageHandler.logln("pdf");
                MessageHandler.logln("output file: " + outfile.toString());
                break;
            case AWT_OUTPUT:
                MessageHandler.logln("awt on screen");
                if (outfile != null) {
                    MessageHandler.logln("ERROR: awt mode, but outfile is set:");
                    MessageHandler.logln("out file: " + outfile.toString());
                }
                break;
            case MIF_OUTPUT:
                MessageHandler.logln("mif");
                MessageHandler.logln("output file: " + outfile.toString());
                break;
            case PRINT_OUTPUT:
                MessageHandler.logln("print directly");
                if (outfile != null) {
                    MessageHandler.logln("ERROR: print mode, but outfile is set:");
                    MessageHandler.logln("out file: " + outfile.toString());
                }
                break;
            case PCL_OUTPUT:
                MessageHandler.logln("pcl");
                MessageHandler.logln("output file: " + outfile.toString());
                break;
            case TXT_OUTPUT:
                MessageHandler.logln("txt");
                MessageHandler.logln("output file: " + outfile.toString());
                break;
            default:
                MessageHandler.logln("unknown input type");
        }


        MessageHandler.logln("OPTIONS");
        if (userConfigFile != null) {
            MessageHandler.logln("user configuration file: " +
                                 userConfigFile.toString());
        } else {
            MessageHandler.logln("no user configuration file is used [default]");
        }
        if (errorDump != null) {
            MessageHandler.logln("debug mode on");
        } else {
            MessageHandler.logln("debug mode off [default]");
        }
        if (dumpConfiguration != null) {
            MessageHandler.logln("dump configuration");
        } else {
            MessageHandler.logln("don't dump configuration [default]");
        }
        if (quiet != null) {
            MessageHandler.logln("quiet mode on");
        } else {
            MessageHandler.logln("quiet mode off [default]");
        }

    }

    //debug: create class and output all settings
    public static void main (String args[]) {
        /*
          for (int i = 0; i < args.length; i++) {
          	MessageHandler.logln(">"+args[i]+"<");
          }*/
	try {
	    CommandLineOptions options = new CommandLineOptions (args);
	}
	catch (Exception e) {
	    e.printStackTrace();
	}
	
        //options.debug();
    }
}