# Copyright (C) 2022 Cochise Ruhulessin
#
# All rights reserved. No warranty, explicit or implicit, provided. In
# no event shall the author(s) be liable for any claim or damages.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
from typing import Any

import phonenumbers
from pydantic import GetJsonSchemaHandler
from pydantic.json_schema import JsonSchemaValue
from pydantic_core import CoreSchema
from pydantic_core import core_schema


class Phonenumber(str):

    @classmethod
    def __get_pydantic_core_schema__(cls, *_: Any) -> CoreSchema:
        return core_schema.json_or_python_schema(
            json_schema=core_schema.str_schema(max_length=128),
            python_schema=core_schema.union_schema([
                core_schema.is_instance_schema(cls),
                core_schema.chain_schema([
                    core_schema.str_schema(max_length=128),
                    core_schema.no_info_plain_validator_function(cls.fromstring)
                ])
            ]),
            serialization=core_schema.plain_serializer_function_ser_schema(str)
        )

    @classmethod
    def __get_pydantic_json_schema__(
        cls,
        _: CoreSchema,
        handler: GetJsonSchemaHandler
    ) -> JsonSchemaValue:
        return handler(core_schema.str_schema(max_length=128))

    @classmethod
    def fromstring(cls, v: Any, _: Any = None) -> str:
        if not isinstance(v, str):
            raise TypeError("string required")
        try:
            p = phonenumbers.parse(v)
            if not phonenumbers.is_valid_number(p):
                raise ValueError("Not a valid phonenumber.")
        except (phonenumbers.NumberParseException, TypeError):
            raise ValueError("Not a valid phonenumber.")
        return cls(
            phonenumbers.format_number(p, phonenumbers.PhoneNumberFormat.E164)
        )

    def __repr__(self) -> str: # pragma: no cover
        return f'<Phonenumber: {str(self)}>'