import json

from requests import RequestException, request

from app.clients.sms import SmsClient, SmsClientResponseException

mmg_response_map = {
    '2': {'status': 'permanent-failure', 'substatus': {
        "1": "Number does not exist",
        "4": "Rejected by operator",
        "5": "Unidentified Subscriber",
        "9": "Undelivered",
        "11": "Service for Subscriber suspended",
        "12": "Illegal equipment",
        "2049": "Subscriber IMSI blacklisted",
        "2050": "Number blacklisted in do-not-disturb blacklist",
        "2052": "Destination number blacklisted",
        "2053": "Source address blacklisted"
    }},
    '3': {'status': 'delivered', 'substatus': {"2": "Delivered to operator", "5": "Delivered to handset"}},
    '4': {'status': 'temporary-failure', 'substatus': {
        "6": "Absent Subscriber",
        "8": "Roaming not allowed",
        "13": "SMS Not Supported",
        "15": "Expired",
        "27": "Absent Subscriber",
        "29": "Invalid delivery report",
        "32": "Delivery Failure",
    }},
    '5': {'status': 'permanent-failure', 'substatus': {
        "6": "Network out of coverage",
        "8": "Incorrect number prefix",
        "10": "Number on do-not-disturb service",
        "11": "Sender id not registered",
        "13": "Sender id blacklisted",
        "14": "Destination number blacklisted",
        "19": "Routing unavailable",
        "20": "Rejected by anti-flooding mechanism",
        "21": "System error",  # it says to retry those messages or contact support
        "23": "Duplicate message id",
        "24": "Message formatted incorrectly",
        "25": "Message too long",
        "51": "Missing recipient value",
        "52": "Invalid destination",
    }},
}


def get_mmg_responses(status, detailed_status_code=None):
    return (mmg_response_map[status]["status"], mmg_response_map[status]["substatus"].get(detailed_status_code, None))


class MMGClientResponseException(SmsClientResponseException):
    def __init__(self, response, exception):
        status_code = response.status_code if response is not None else 504
        text = response.text if response is not None else "Gateway Time-out"

        self.status_code = status_code
        self.text = text
        self.exception = exception

    def __str__(self):
        return "Code {} text {} exception {}".format(self.status_code, self.text, str(self.exception))


class MMGClient(SmsClient):
    '''
    MMG sms client
    '''

    def init_app(self, *args, **kwargs):
        super().init_app(*args, **kwargs)
        self.api_key = self.current_app.config.get('MMG_API_KEY')
        self.mmg_url = self.current_app.config.get('MMG_URL')

    @property
    def name(self):
        return 'mmg'

    def try_send_sms(self, to, content, reference, international, sender):
        data = {
            "reqType": "BULK",
            "MSISDN": to,
            "msg": content,
            "sender": sender,
            "cid": reference,
            "multi": True
        }

        try:
            response = request(
                "POST",
                self.mmg_url,
                data=json.dumps(data),
                headers={
                    'Content-Type': 'application/json',
                    'Authorization': 'Basic {}'.format(self.api_key)
                },
                timeout=60
            )

            response.raise_for_status()
            try:
                json.loads(response.text)
            except (ValueError, AttributeError):
                raise SmsClientResponseException("Invalid response JSON")
        except RequestException:
            raise SmsClientResponseException("Request failed")

        return response