from inspect import isclass
from typing import Dict, Iterable, Type, Union

from ereuse_devicehub.ereuse_utils.test import JSON, Res
from flask.testing import FlaskClient
from flask_wtf.csrf import generate_csrf
from werkzeug.exceptions import HTTPException

from ereuse_devicehub.resources import models, schemas
from ereuse_devicehub.teal.client import Client as TealClient
from ereuse_devicehub.teal.client import Query, Status

ResourceLike = Union[Type[Union[models.Thing, schemas.Thing]], str]


class Client(TealClient):
    """A client suited for Devicehub main usage."""

    def __init__(
        self,
        application,
        response_wrapper=None,
        use_cookies=False,
        allow_subdomain_redirects=False,
    ):
        super().__init__(
            application, response_wrapper, use_cookies, allow_subdomain_redirects
        )

    def open(
        self,
        uri: str,
        res: ResourceLike = None,
        status: Status = 200,
        query: Query = tuple(),
        accept=JSON,
        content_type=JSON,
        item=None,
        headers: dict = None,
        token: str = None,
        **kw,
    ) -> Res:
        if isclass(res) and issubclass(res, (models.Thing, schemas.Thing)):
            res = res.t
        return super().open(
            uri, res, status, query, accept, content_type, item, headers, token, **kw
        )

    def get(
        self,
        uri: str = '',
        res: ResourceLike = None,
        query: Query = tuple(),
        status: Status = 200,
        item: Union[int, str] = None,
        accept: str = JSON,
        headers: dict = None,
        token: str = None,
        **kw,
    ) -> Res:
        return super().get(uri, res, query, status, item, accept, headers, token, **kw)

    def post(
        self,
        data: str or dict,
        uri: str = '',
        res: ResourceLike = None,
        query: Query = tuple(),
        status: Status = 201,
        content_type: str = JSON,
        accept: str = JSON,
        headers: dict = None,
        token: str = None,
        **kw,
    ) -> Res:
        return super().post(
            data, uri, res, query, status, content_type, accept, headers, token, **kw
        )

    def patch(
        self,
        data: str or dict,
        uri: str = '',
        res: ResourceLike = None,
        query: Query = tuple(),
        item: Union[int, str] = None,
        status: Status = 200,
        content_type: str = JSON,
        accept: str = JSON,
        headers: dict = None,
        token: str = None,
        **kw,
    ) -> Res:
        return super().patch(
            data,
            uri,
            res,
            query,
            item,
            status,
            content_type,
            accept,
            token,
            headers,
            **kw,
        )

    def put(
        self,
        data: str or dict,
        uri: str = '',
        res: ResourceLike = None,
        query: Query = tuple(),
        item: Union[int, str] = None,
        status: Status = 201,
        content_type: str = JSON,
        accept: str = JSON,
        headers: dict = None,
        token: str = None,
        **kw,
    ) -> Res:
        return super().put(
            data,
            uri,
            res,
            query,
            item,
            status,
            content_type,
            accept,
            token,
            headers,
            **kw,
        )

    def delete(
        self,
        uri: str = '',
        res: ResourceLike = None,
        query: Query = tuple(),
        status: Status = 204,
        item: Union[int, str] = None,
        accept: str = JSON,
        headers: dict = None,
        token: str = None,
        **kw,
    ) -> Res:
        return super().delete(
            uri, res, query, status, item, accept, headers, token, **kw
        )

    def login(self, email: str, password: str):
        assert isinstance(email, str)
        assert isinstance(password, str)
        return self.post(
            {'email': email, 'password': password}, '/users/login/', status=200
        )

    def get_many(
        self,
        res: ResourceLike,
        resources: Iterable[Union[dict, int]],
        key: str = None,
        **kw,
    ) -> Iterable[Union[Dict[str, object], str]]:
        """Like :meth:`.get` but with many resources."""
        return (
            self.get(res=res, item=r[key] if key else r, **kw)[0] for r in resources
        )


class UserClient(Client):
    """A client that identifies all of its requests with a specific user.

    It will automatically perform login on the first request.
    """

    def __init__(
        self,
        application,
        email: str,
        password: str,
        response_wrapper=None,
        use_cookies=False,
        allow_subdomain_redirects=False,
    ):
        super().__init__(
            application, response_wrapper, use_cookies, allow_subdomain_redirects
        )
        self.email = email  # type: str
        self.password = password  # type: str
        self.user = None  # type: dict

    def open(
        self,
        uri: str,
        res: ResourceLike = None,
        status: int or HTTPException = 200,
        query: Query = tuple(),
        accept=JSON,
        content_type=JSON,
        item=None,
        headers: dict = None,
        token: str = None,
        **kw,
    ) -> Res:
        return super().open(
            uri,
            res,
            status,
            query,
            accept,
            content_type,
            item,
            headers,
            self.user['token'] if self.user else token,
            **kw,
        )

    # noinspection PyMethodOverriding
    def login(self):
        response = super().login(self.email, self.password)
        self.user = response[0]
        return response


class UserClientFlask:
    def __init__(
        self,
        application,
        email: str,
        password: str,
        response_wrapper=None,
        use_cookies=True,
        follow_redirects=True,
    ):
        self.email = email
        self.password = password
        self.follow_redirects = follow_redirects
        self.user = None

        self.client = FlaskClient(application, use_cookies=use_cookies)
        self.client.get('/login/')

        data = {
            'email': email,
            'password': password,
            'csrf_token': generate_csrf(),
        }
        body, status, headers = self.client.post(
            '/login/', data=data, follow_redirects=True
        )
        self.headers = headers
        body = next(body).decode("utf-8")
        assert "Unassigned" in body

    def get(
        self,
        uri='',
        data=None,
        follow_redirects=True,
        content_type='text/html; charset=utf-8',
        decode=True,
        **kw,
    ):

        body, status, headers = self.client.get(
            uri, data=data, follow_redirects=follow_redirects, headers=self.headers
        )
        if decode:
            body = next(body).decode("utf-8")
        return (body, status)

    def post(
        self,
        uri='',
        data=None,
        follow_redirects=True,
        content_type='application/x-www-form-urlencoded',
        decode=True,
        **kw,
    ):

        body, status, headers = self.client.post(
            uri,
            data=data,
            follow_redirects=follow_redirects,
            headers=self.headers,
            content_type=content_type,
        )
        if decode:
            body = next(body).decode("utf-8")
        return (body, status)