from krpc.utils import snake_case
from krpc.types import \
    ValueType, MessageType, ClassType, EnumType, ListType, DictionaryType, \
    SetType, TupleType
from .domain import Domain
from .nodes import \
    Procedure, Property, Class, ClassMethod, ClassStaticMethod, \
    ClassProperty, Enumeration, EnumerationValue


class PythonDomain(Domain):
    name = 'python'
    prettyname = 'Python'
    sphinxname = 'py'
    codeext = 'py'

    value_map = {
        'null': 'None',
        'true': 'True',
        'false': 'False'
    }

    def __init__(self, macros):
        super(PythonDomain, self).__init__(macros)

    def currentmodule(self, name):
        super(PythonDomain, self).currentmodule(name)
        return '.. currentmodule:: %s' % name

    def type(self, typ):
        if isinstance(typ, ValueType):
            return typ.python_type.__name__
        elif isinstance(typ, MessageType):
            return 'krpc.schema.%s' % typ.protobuf_type
        elif isinstance(typ, ClassType):
            return self.shorten_ref(typ.protobuf_type[6:-1])
        elif isinstance(typ, EnumType):
            return self.shorten_ref(typ.protobuf_type[5:-1])
        elif isinstance(typ, ListType):
            return 'list'
        elif isinstance(typ, DictionaryType):
            return 'dict'
        elif isinstance(typ, SetType):
            return 'set'
        elif isinstance(typ, TupleType):
            return 'tuple'
        else:
            raise RuntimeError('Unknown type \'%s\'' % str(typ))

    def type_description(self, typ):
        if isinstance(typ, ValueType):
            return typ.python_type.__name__
        elif isinstance(typ, MessageType):
            return ':class:`krpc.schema.%s`' % typ.protobuf_type
        elif isinstance(typ, ClassType):
            return ':class:`%s`' % self.type(typ)
        elif isinstance(typ, EnumType):
            return ':class:`%s`' % self.type(typ)
        elif isinstance(typ, ListType):
            return 'list of %s' % self.type_description(typ.value_type)
        elif isinstance(typ, DictionaryType):
            return 'dict from %s to %s' % \
                (self.type_description(typ.key_type),
                 self.type_description(typ.value_type))
        elif isinstance(typ, SetType):
            return 'set of %s' % self.type_description(typ.value_type)
        elif isinstance(typ, TupleType):
            return 'tuple of (%s)' % \
                ', '.join(self.type_description(typ)
                          for typ in typ.value_types)
        else:
            raise RuntimeError('Unknown type \'%s\'' % str(typ))

    def ref(self, obj):
        name = obj.fullname
        if any(isinstance(obj, cls) for cls in
               (Procedure, Property, ClassMethod,
                ClassStaticMethod, ClassProperty, EnumerationValue)):
            name = name.split('.')
            name[-1] = snake_case(name[-1])
            name = '.'.join(name)
        return self.shorten_ref(name)

    def see(self, obj):
        if any(isinstance(obj, cls)
               for cls in (Property, ClassProperty, EnumerationValue)):
            prefix = 'attr'
        elif any(isinstance(obj, cls)
                 for cls in (Procedure, ClassMethod, ClassStaticMethod)):
            prefix = 'meth'
        elif any(isinstance(obj, cls) for cls in (Class, Enumeration)):
            prefix = 'class'
        else:
            raise RuntimeError(str(obj))
        return ':%s:`%s`' % (prefix, self.ref(obj))

    def paramref(self, name):
        return super(PythonDomain, self).paramref(snake_case(name))
