# Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011, 2012  Andrey Golovizin
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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"""convert bibliography database from one format to another
"""
from os import path
from pybtex.exceptions import PybtexError
from pybtex.plugin import find_plugin

class ConvertError(PybtexError):
    pass


def convert(from_filename, to_filename,
        from_format=None, to_format=None,
        input_encoding=None, output_encoding=None,
        parser_options=None):
    if parser_options is None:
        parser_options = {}
    input_format = find_plugin('pybtex.database.input', name=from_format, filename=from_filename)
    output_format = find_plugin('pybtex.database.output', name=to_format, filename=to_filename)
    
    if from_filename == to_filename:
        raise ConvertError('input and output file can not be the same')

    bib_data = input_format(input_encoding, **parser_options).parse_file(from_filename)
    output_format(output_encoding).write_file(bib_data, to_filename)