#!/usr/bin/env python
#
# Copyright 2014 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#

from __future__ import absolute_import
from __future__ import unicode_literals

from gnuradio import gr, blocks

from . import fec_python as fec
from .threaded_encoder import threaded_encoder
from .capillary_threaded_encoder import capillary_threaded_encoder
from .bitflip import read_bitlist


class extended_encoder(gr.hier_block2):
    def __init__(self, encoder_obj_list, threading, puncpat=None):
        gr.hier_block2.__init__(self, "extended_encoder",
                                gr.io_signature(1, 1, gr.sizeof_char),
                                gr.io_signature(1, 1, gr.sizeof_char))

        self.blocks=[]
        self.puncpat=puncpat

        if(type(encoder_obj_list) == list):
            if(type(encoder_obj_list[0]) == list):
                gr.log.info("fec.extended_encoder: Parallelism must be 1.")
                raise AttributeError
        else:
            # If it has parallelism of 0, force it into a list of 1
            encoder_obj_list = [encoder_obj_list,]

        if fec.get_encoder_input_conversion(encoder_obj_list[0]) == "pack":
            self.blocks.append(blocks.pack_k_bits_bb(8))

        if threading == 'capillary':
            self.blocks.append(capillary_threaded_encoder(encoder_obj_list,
                                                          gr.sizeof_char,
                                                          gr.sizeof_char))
        elif threading == 'ordinary':
            self.blocks.append(threaded_encoder(encoder_obj_list,
                                                gr.sizeof_char,
                                                gr.sizeof_char))
        else:
            self.blocks.append(fec.encoder(encoder_obj_list[0],
                                           gr.sizeof_char,
                                           gr.sizeof_char))

        if fec.get_encoder_output_conversion(encoder_obj_list[0]) == "packed_bits":
            self.blocks.append(blocks.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST))

        if self.puncpat != '11':
            self.blocks.append(fec.puncture_bb(len(puncpat), read_bitlist(puncpat), 0))

        # Connect the input to the encoder and the output to the
        # puncture if used or the encoder if not.
        self.connect((self, 0), (self.blocks[0], 0));
        self.connect((self.blocks[-1], 0), (self, 0));

        # If using the puncture block, add it into the flowgraph after
        # the encoder.
        for i in range(len(self.blocks) - 1):
            self.connect((self.blocks[i], 0), (self.blocks[i+1], 0));