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import json
from typing import List, Optional, Union

import requests
from requests import Session

from airflow.exceptions import AirflowException
from airflow.providers.http.hooks.http import HttpHook


class DingdingHook(HttpHook):
    """
    This hook allows you send Dingding message using Dingding custom bot.
    Get Dingding token from conn_id.password. And prefer set domain to
    conn_id.host, if not will use default ``https://oapi.dingtalk.com``.

    For more detail message in
    `Dingding custom bot <https://open-doc.dingtalk.com/microapp/serverapi2/qf2nxq>`_

    :param dingding_conn_id: The name of the Dingding connection to use
    :type dingding_conn_id: str
    :param message_type: Message type you want to send to Dingding, support five type so far
        including text, link, markdown, actionCard, feedCard
    :type message_type: str
    :param message: The message send to Dingding chat group
    :type message: str or dict
    :param at_mobiles: Remind specific users with this message
    :type at_mobiles: list[str]
    :param at_all: Remind all people in group or not. If True, will overwrite ``at_mobiles``
    :type at_all: bool
    """

    conn_name_attr = 'dingding_conn_id'
    default_conn_name = 'dingding_default'
    conn_type = 'dingding'
    hook_name = 'Dingding'

    def __init__(
        self,
        dingding_conn_id='dingding_default',
        message_type: str = 'text',
        message: Optional[Union[str, dict]] = None,
        at_mobiles: Optional[List[str]] = None,
        at_all: bool = False,
        *args,
        **kwargs,
    ) -> None:
        super().__init__(http_conn_id=dingding_conn_id, *args, **kwargs)  # type: ignore[misc]
        self.message_type = message_type
        self.message = message
        self.at_mobiles = at_mobiles
        self.at_all = at_all

    def _get_endpoint(self) -> str:
        """Get Dingding endpoint for sending message."""
        conn = self.get_connection(self.http_conn_id)
        token = conn.password
        if not token:
            raise AirflowException(
                'Dingding token is requests but get nothing, check you conn_id configuration.'
            )
        return f'robot/send?access_token={token}'

    def _build_message(self) -> str:
        """
        Build different type of Dingding message
        As most commonly used type, text message just need post message content
        rather than a dict like ``{'content': 'message'}``
        """
        if self.message_type in ['text', 'markdown']:
            data = {
                'msgtype': self.message_type,
                self.message_type: {'content': self.message} if self.message_type == 'text' else self.message,
                'at': {'atMobiles': self.at_mobiles, 'isAtAll': self.at_all},
            }
        else:
            data = {'msgtype': self.message_type, self.message_type: self.message}
        return json.dumps(data)

    def get_conn(self, headers: Optional[dict] = None) -> Session:
        """
        Overwrite HttpHook get_conn because just need base_url and headers and
        not don't need generic params

        :param headers: additional headers to be passed through as a dictionary
        :type headers: dict
        """
        conn = self.get_connection(self.http_conn_id)
        self.base_url = conn.host if conn.host else 'https://oapi.dingtalk.com'
        session = requests.Session()
        if headers:
            session.headers.update(headers)
        return session

    def send(self) -> None:
        """Send Dingding message"""
        support_type = ['text', 'link', 'markdown', 'actionCard', 'feedCard']
        if self.message_type not in support_type:
            raise ValueError(
                f'DingdingWebhookHook only support {support_type} so far, but receive {self.message_type}'
            )

        data = self._build_message()
        self.log.info('Sending Dingding type %s message %s', self.message_type, data)
        resp = self.run(
            endpoint=self._get_endpoint(), data=data, headers={'Content-Type': 'application/json'}
        )

        # Dingding success send message will with errcode equal to 0
        if int(resp.json().get('errcode')) != 0:
            raise AirflowException(f'Send Dingding message failed, receive error message {resp.text}')
        self.log.info('Success Send Dingding message')
