#
# 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".
# 
# As a counterpart to the access to the source code and rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty and the software's author, the holder of the
# economic rights, and the successive licensors have only limited
# liability.
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# In this respect, the user's attention is drawn to the risks associated
# with loading, using, modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
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# The fact that you are presently reading this means that you have had
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#
import re
import sys
from commons.core.parsing.MapperParser import MapperParser
from SMART.Java.Python.structure.Mapping import Mapping


class SeqmapParser(MapperParser):
    """A class that parses the output of SeqMap"""

    def __init__(self, fileName, verbosity = 0):
        super(SeqmapParser, self).__init__(fileName, verbosity)


    def __del__(self):
        super(SeqmapParser, self).__del__()


    def getFileFormats():
        return ["seqmap"]
    getFileFormats = staticmethod(getFileFormats)


    def skipFirstLines(self):
        self.startingPoint = self.handle.tell()
        self.currentLineNb += 1
        if "trans_id" not in self.handle.readline():
            self.currentLineNb -= 1
            self.handle.seek(self.startingPoint)
        self.startingPoint = self.handle.tell()


    def parseLine(self, line):
        m = re.search(r"^\s*(\S+)\t+(\d+)\t+(\w+)\t+([^\t]+)\t+(\w+)\t+(\d+)\t+([+-])\s*$", line)
        if m == None:
            sys.exit("\nLine %d '%s' does not have a SeqMap format" % (self.currentLineNb, line))

        mapping = Mapping()

        mapping.targetInterval.setChromosome(m.group(1))
        mapping.targetInterval.setStart(int(m.group(2)))
        mapping.targetInterval.setSize(len(m.group(3)))

        mapping.queryInterval.setName(m.group(4))
        mapping.queryInterval.setStart(1)
        mapping.queryInterval.setSize(len(m.group(3)))

        mapping.setSize(len(m.group(3)))
        mapping.setNbMismatches(int(m.group(6)))
        mapping.setDirection(m.group(7))

        return mapping