#
# Copyright INRA-URGI 2009-2010
# 
# This software is governed by the CeCILL license under French law and
# abiding by the rules of distribution of free software. You can use,
# modify and/ or redistribute the software under the terms of the CeCILL
# license as circulated by CEA, CNRS and INRIA at the following URL
# "http://www.cecill.info".
# 
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# software by the user in light of its specific status of free software,
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from commons.core.writer.TranscriptListWriter import TranscriptListWriter


class GbWriter(TranscriptListWriter):
    """
    A class that writes a transcript list into a file with GBrowse format
    @ivar fileName: name of the file 
    @type fileName: string
    @ivar handle: handle to the file
    @type handle: file handle
    @ivar header: first lines of the file
    @type header: string
    """


    def __init__(self, fileName, verbosity = 0):
        """
        Constructor
        @param fileName: name of the file 
        @type fileName: string
        @param verbosity: verbosity
        @type verbosity: int
        """
        self.header = "[READS]\nbgcolor = red\nstrand_arrow = 1\n\n"
        super(GbWriter, self).__init__(fileName, verbosity)
     
        
    @staticmethod
    def getFileFormats():
        """
        Get the format of the file
        """
        return ["gb", "gbrowse"]
        
        
    @staticmethod
    def getExtension():
        """
        Get the usual extension for the file
        """
        return "gb"
        
        
    def setColor(self, color):
        """
        Set the color of the track
        @param color: the color of the track
        @type    color: string
        """
        if color != None:
            self.header = "[READS]\nbgcolor= %s\nstrand_arrow = 1\n\n" % (color)
        
        
    def copyProperties(self, gbParser):
        """
        Copy the properties collected by a parser, to produce a similar output
        @param gbParser: a GBrowse parser
        @type    gbParser: class L{GbParser<GbParser>}
        """
        self.setColor(gbParser.color)
        

    def printTranscript(self, transcript):
        """
        Export the given transcript with GBrowse format
        Possibly skip the reference if already put
        @param transcript: transcript to be printed
        @type transcript: class L{Transcript<Transcript>}
        @return: a string
        """
        if self.lastChromosome != None and self.lastChromosome == transcript.getChromosome():
            return transcript.printGBrowseLine()
        return transcript.printGBrowse()