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import getopt,sys
import uno
from unohelper import Base,systemPathToFileUrl, absolutize
from os import getcwd

from com.sun.star.beans import PropertyValue
from com.sun.star.beans.PropertyState import DIRECT_VALUE
from com.sun.star.uno import Exception as UnoException
from com.sun.star.io import IOException,XInputStream, XOutputStream

class OutputStream( Base, XOutputStream ):
    def __init__( self ):
        self.closed = 0

    def closeOutput(self):
        self.closed = 1

    def writeBytes( self, seq ):
        sys.stdout.write( seq.value )

    def flush( self ):
        pass


def main():
    retVal = 0
    doc = None

    try:
        opts, args = getopt.getopt(sys.argv[1:], "hc:",["help", "connection-string=" , "html"])
        format = None
        url = "uno:socket,host=localhost,port=2002;urp;StarOffice.ComponentContext"
        filterName = "Text (Encoded)"
        for o, a in opts:
            if o in ("-h", "--help"):
                usage()
                sys.exit()
            if o in ("-c", "--connection-string" ):
                url = "uno:" + a + ";urp;StarOffice.ComponentContext"
            if o == "--html":
                filterName = "HTML (StarWriter)"

        print(filterName)
        if not len( args ):
            usage()
            sys.exit()

        ctxLocal = uno.getComponentContext()
        smgrLocal = ctxLocal.ServiceManager

        resolver = smgrLocal.createInstanceWithContext(
                 "com.sun.star.bridge.UnoUrlResolver", ctxLocal )
        ctx = resolver.resolve( url )
        smgr = ctx.ServiceManager

        desktop = smgr.createInstanceWithContext("com.sun.star.frame.Desktop", ctx )

        cwd = systemPathToFileUrl( getcwd() )
        outProps = (
            PropertyValue( "FilterName" , 0, filterName , 0 ),
            PropertyValue( "OutputStream",0, OutputStream(),0))
        inProps = PropertyValue( "Hidden" , 0 , True, 0 ),
        for path in args:
            try:
                fileUrl = uno.absolutize( cwd, systemPathToFileUrl(path) )
                doc = desktop.loadComponentFromURL( fileUrl , "_blank", 0,inProps)

                if not doc:
                    raise UnoException( "Couldn't open stream for unknown reason", None )

                doc.storeToURL("private:stream",outProps)
            except IOException as e:
                sys.stderr.write( "Error during conversion: " + e.Message + "\n" )
                retVal = 1
            except UnoException as e:
                sys.stderr.write( "Error ("+repr(e.__class__)+") during conversion:" + e.Message + "\n" )
                retVal = 1
            if doc:
                doc.dispose()

    except UnoException as e:
        sys.stderr.write( "Error ("+repr(e.__class__)+") :" + e.Message + "\n" )
        retVal = 1
    except getopt.GetoptError as e:
        sys.stderr.write( str(e) + "\n" )
        usage()
        retVal = 1

    sys.exit(retVal)

def usage():
    sys.stderr.write( "usage: ooextract.py --help |\n"+
                  "       [-c <connection-string> | --connection-string=<connection-string>\n"+
                  "       file1 file2 ...\n"+
                  "\n" +
                  "Extracts plain text from documents and prints it to stdout.\n" +
                  "Requires an OpenOffice.org instance to be running. The script and the\n"+
                  "running OpenOffice.org instance must be able to access the file with\n"+
                  "by the same system path.\n"
                  "\n"+
                  "-c <connection-string> | --connection-string=<connection-string>\n" +
                  "        The connection-string part of a uno url to where the\n" +
                  "        the script should connect to in order to do the conversion.\n" +
                  "        The strings defaults to socket,host=localhost,port=2002\n"
                  "--html \n"
                  "        Instead of the text filter, the writer HTML filter is used\n"
                  )

main()