#
# This file is part of pyasn1 software.
#
# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
# License: http://pyasn1.sf.net/license.html
#
try:
    from collections import OrderedDict

except ImportError:
    OrderedDict = dict

from pyasn1.type import base, univ, char, useful
from pyasn1 import debug, error

__all__ = ['encode']


class AbstractItemEncoder(object):
    def encode(self, encodeFun, value):
        raise error.PyAsn1Error('Not implemented')


class ExplicitlyTaggedItemEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        if isinstance(value, base.AbstractConstructedAsn1Item):
            value = value.clone(tagSet=value.getTagSet()[:-1],
                                cloneValueFlag=1)
        else:
            value = value.clone(tagSet=value.getTagSet()[:-1])
        return encodeFun(value)

explicitlyTaggedItemEncoder = ExplicitlyTaggedItemEncoder()


class BooleanEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return bool(value)


class IntegerEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return int(value)


class BitStringEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return str(value)


class OctetStringEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return value.asOctets()


class TextStringEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return value.prettyPrint()


class NullEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return None


class ObjectIdentifierEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return str(value)


class RealEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return float(value)


class SetEncoder(AbstractItemEncoder):
    protoDict = dict
    def encode(self, encodeFun, value):
        value.setDefaultComponents()
        value.verifySizeSpec()
        substrate = self.protoDict()
        for key, subValue in value.items():
            if subValue is None:  # Optional component
                continue
            substrate[key] = encodeFun(subValue)
        return substrate


class SequenceEncoder(SetEncoder):
    protoDict = OrderedDict


class SequenceOfEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        value.verifySizeSpec()
        return [encodeFun(x) for x in value]


class ChoiceEncoder(SequenceEncoder):
    pass


class AnyEncoder(AbstractItemEncoder):
    def encode(self, encodeFun, value):
        return value.asOctets()


tagMap = {
    univ.Boolean.tagSet: BooleanEncoder(),
    univ.Integer.tagSet: IntegerEncoder(),
    univ.BitString.tagSet: BitStringEncoder(),
    univ.OctetString.tagSet: OctetStringEncoder(),
    univ.Null.tagSet: NullEncoder(),
    univ.ObjectIdentifier.tagSet: ObjectIdentifierEncoder(),
    univ.Enumerated.tagSet: IntegerEncoder(),
    univ.Real.tagSet: RealEncoder(),
    # Sequence & Set have same tags as SequenceOf & SetOf
    univ.SequenceOf.tagSet: SequenceOfEncoder(),
    univ.SetOf.tagSet: SequenceOfEncoder(),
    univ.Choice.tagSet: ChoiceEncoder(),
    # character string types
    char.UTF8String.tagSet: TextStringEncoder(),
    char.NumericString.tagSet: TextStringEncoder(),
    char.PrintableString.tagSet: TextStringEncoder(),
    char.TeletexString.tagSet: TextStringEncoder(),
    char.VideotexString.tagSet: TextStringEncoder(),
    char.IA5String.tagSet: TextStringEncoder(),
    char.GraphicString.tagSet: TextStringEncoder(),
    char.VisibleString.tagSet: TextStringEncoder(),
    char.GeneralString.tagSet: TextStringEncoder(),
    char.UniversalString.tagSet: TextStringEncoder(),
    char.BMPString.tagSet: TextStringEncoder(),