from __future__ import annotations

import datetime
import hashlib
import uuid
from datetime import timezone

from django.test import RequestFactory, SimpleTestCase, override_settings, tag

from anymail.exceptions import AnymailWebhookValidationFailure
from anymail.signals import EventType, RejectReason
from anymail.webhooks.unisender_go import UnisenderGoTrackingWebhookView

EVENT_TYPE = EventType.SENT
EVENT_TIME = "2015-11-30 15:09:42"
EVENT_DATETIME = datetime.datetime(2015, 11, 30, 15, 9, 42, tzinfo=timezone.utc)
JOB_ID = "1a3Q2V-0000OZ-S0"
DELIVERY_RESPONSE = "550 Spam rejected"
UNISENDER_TEST_EMAIL = "recipient.email@example.com"
TEST_API_KEY = "api_key"
TEST_EMAIL_ID = str(uuid.uuid4())
UNISENDER_TEST_DEFAULT_EXAMPLE = {
    "auth": TEST_API_KEY,
    "events_by_user": [
        {
            "user_id": 456,
            "project_id": "6432890213745872",
            "project_name": "MyProject",
            "events": [
                {
                    "event_name": "transactional_email_status",
                    "event_data": {
                        "job_id": JOB_ID,
                        "metadata": {"key1": "val1", "anymail_id": TEST_EMAIL_ID},
                        "email": UNISENDER_TEST_EMAIL,
                        "status": EVENT_TYPE,
                        "event_time": EVENT_TIME,
                        "url": "http://some.url.com",
                        "delivery_info": {
                            "delivery_status": "err_delivery_failed",
                            "destination_response": DELIVERY_RESPONSE,
                            "user_agent": (
                                "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 "
                                "(KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                            ),
                            "ip": "111.111.111.111",
                        },
                    },
                },
                {
                    "event_name": "transactional_spam_block",
                    "event_data": {
                        "block_time": "YYYY-MM-DD HH:MM:SS",
                        "block_type": "one_smtp",
                        "domain": "domain_name",
                        "SMTP_blocks_count": 8,
                        "domain_status": "blocked",
                    },
                },
            ],
        }
    ],
}
EXAMPLE_WITHOUT_DELIVERY_INFO = {
    "auth": "",
    "events_by_user": [
        {
            "events": [
                {
                    "event_name": "transactional_email_status",
                    "event_data": {
                        "job_id": JOB_ID,
                        "metadata": {},
                        "email": UNISENDER_TEST_EMAIL,
                        "status": EVENT_TYPE,
                        "event_time": EVENT_TIME,
                    },
                }
            ]
        }
    ],
}
REQUEST_JSON = '{"auth":"api_key","key":"value"}'
REQUEST_JSON_MD5 = "8c64386327f53722434f44021a7a0d40"  # md5 hash of REQUEST_JSON
REQUEST_DATA_AUTH = {"auth": REQUEST_JSON_MD5, "key": "value"}


def _request_json_to_dict_with_hashed_key(request_json: bytes) -> dict[str, str]:
    new_auth = hashlib.md5(request_json).hexdigest()
    return {"auth": new_auth, "key": "value"}


@tag("unisender_go")
class TestUnisenderGoWebhooks(SimpleTestCase):
    def test_sent_event(self):
        request = RequestFactory().post(
            path="/",
            data=UNISENDER_TEST_DEFAULT_EXAMPLE,
            content_type="application/json",
        )
        view = UnisenderGoTrackingWebhookView()

        events = view.parse_events(request)
        event = events[0]

        self.assertEqual(len(events), 1)
        self.assertEqual(event.event_type, EVENT_TYPE)
        self.assertEqual(event.timestamp, EVENT_DATETIME)
        self.assertIsNone(event.event_id)
        self.assertEqual(event.recipient, UNISENDER_TEST_EMAIL)
        self.assertEqual(event.reject_reason, RejectReason.OTHER)
        self.assertEqual(event.mta_response, DELIVERY_RESPONSE)
        self.assertDictEqual(event.metadata, {"key1": "val1"})

    def test_without_delivery_info(self):
        request = RequestFactory().post(
            path="/",
            data=EXAMPLE_WITHOUT_DELIVERY_INFO,
            content_type="application/json",
        )
        view = UnisenderGoTrackingWebhookView()

        events = view.parse_events(request)

        self.assertEqual(len(events), 1)
        # Without metadata["anymail_id"], message_id uses the job_id.
        # (This covers messages sent with "UNISENDER_GO_GENERATE_MESSAGE_ID": False.)
        self.assertEqual(events[0].message_id, JOB_ID)

    @override_settings(ANYMAIL_UNISENDER_GO_API_KEY=TEST_API_KEY)
    def test_check_authorization(self):
        """Asserts that nothing is failing"""
        request_data = _request_json_to_dict_with_hashed_key(
            b'{"auth":"api_key","key":"value"}',
        )
        request = RequestFactory().post(
            path="/", data=request_data, content_type="application/json"
        )
        view = UnisenderGoTrackingWebhookView()

        view.validate_request(request)

    @override_settings(ANYMAIL_UNISENDER_GO_API_KEY=TEST_API_KEY)
    def test_check_authorization__fail__ordinar_quoters(self):
        request_json = b"{'auth':'api_key','key':'value'}"
        request_data = _request_json_to_dict_with_hashed_key(request_json)
        request = RequestFactory().post(
            path="/", data=request_data, content_type="application/json"
        )
        view = UnisenderGoTrackingWebhookView()

        with self.assertRaises(AnymailWebhookValidationFailure):
            view.validate_request(request)

    @override_settings(ANYMAIL_UNISENDER_GO_API_KEY=TEST_API_KEY)
    def test_check_authorization__fail__spaces_after_semicolon(self):
        request_json = b'{"auth": "api_key","key": "value"}'
        request_data = _request_json_to_dict_with_hashed_key(request_json)
        request = RequestFactory().post(
            path="/", data=request_data, content_type="application/json"
        )
        view = UnisenderGoTrackingWebhookView()

        with self.assertRaises(AnymailWebhookValidationFailure):
            view.validate_request(request)

    @override_settings(ANYMAIL_UNISENDER_GO_API_KEY=TEST_API_KEY)
    def test_check_authorization__fail__spaces_after_comma(self):
        request_json = b'{"auth":"api_key", "key":"value"}'
        request_data = _request_json_to_dict_with_hashed_key(request_json)
        request = RequestFactory().post(
            path="/", data=request_data, content_type="application/json"
        )
        view = UnisenderGoTrackingWebhookView()

        with self.assertRaises(AnymailWebhookValidationFailure):
            view.validate_request(request)