# Copyright (c) 2013, Kevin Greenan (kmgreen2@gmail.com)
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.  THIS SOFTWARE IS
# PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
# NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

from pyeclib.ec_iface import ECDriver
import argparse

parser = argparse.ArgumentParser(description='Encoder for PyECLib.')
parser.add_argument('k', type=int, help='number of data elements')
parser.add_argument('m', type=int, help='number of parity elements')
parser.add_argument('ec_type', help='EC algorithm used')
parser.add_argument('file_dir', help='directory with the file')
parser.add_argument('filename', help='file to encode')
parser.add_argument('fragment_dir', help='directory to drop encoded fragments')

args = parser.parse_args()

print("k = %d, m = %d" % (args.k, args.m))
print("ec_type = %s" % args.ec_type)
print("filename = %s" % args.filename)

ec_driver = ECDriver(k=args.k, m=args.m, ec_type=args.ec_type)

# read
with open(("%s/%s" % (args.file_dir, args.filename)), "rb") as fp:
    whole_file_str = fp.read()

# encode
fragments = ec_driver.encode(whole_file_str)

# store
i = 0
for fragment in fragments:
    with open("%s/%s.%d" % (args.fragment_dir, args.filename, i), "wb") as fp:
        fp.write(fragment)
    i += 1