# Copyright 2016-2017 Versada <https://versada.eu/>
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).

import logging
import sys

from mock import patch
from sentry_sdk.integrations.logging import _IGNORED_LOGGERS
from sentry_sdk.transport import HttpTransport

from odoo import exceptions
from odoo.tests import TransactionCase
from odoo.tools import config

from ..hooks import initialize_sentry

GIT_SHA = "d670460b4b4aece5915caf5c68d12f560a9fe3e4"
RELEASE = "test@1.2.3"


def remove_handler_ignore(handler_name):
    """Removes handlers of handlers ignored list."""
    _IGNORED_LOGGERS.discard(handler_name)


class TestException(exceptions.UserError):
    pass


class InMemoryTransport(HttpTransport):
    """A :class:`sentry_sdk.Hub.transport` subclass which simply stores events in a list.

    Extended based on the one found in raven-python to avoid additional testing
    dependencies: https://git.io/vyGO3
    """

    def __init__(self, *args, **kwargs):
        self.events = []
        self.envelopes = []

    def capture_event(self, event, *args, **kwargs):
        self.events.append(event)

    def capture_envelope(self, envelope, *args, **kwargs):
        self.envelopes.append(envelope)

    def has_event(self, event_level, event_msg):
        for event in self.events:
            if (
                event.get("level") == event_level
                and event.get("logentry", {}).get("message") == event_msg
            ):
                return True
        return False

    def flush(self, *args, **kwargs):
        pass

    def kill(self, *args, **kwargs):
        pass


class NoopHandler(logging.Handler):
    """
    A Handler subclass that does nothing with any given log record.

    Sentry's log patching works by having the integration process things after
    the normal log handlers are run, so we use this handler to do nothing and
    move to Sentry logic ASAP.
    """

    def emit(self, record):
        pass


class TestClientSetup(TransactionCase):
    def setUp(self):
        super(TestClientSetup, self).setUp()
        self.dsn = "http://public:secret@example.com/1"
        self.patch_config(
            {
                "sentry_enabled": True,
                "sentry_dsn": self.dsn,
                "sentry_logging_level": "error",
            }
        )
        self.client = initialize_sentry(config)._client
        self.client.transport = InMemoryTransport({"dsn": self.dsn})

        # Setup our own logger so we don't flood stderr with error logs
        self.logger = logging.getLogger("odoo.sentry.test.logger")
        # Do not mutate list while iterating it
        handlers = [handler for handler in self.logger.handlers]
        for handler in handlers:
            self.logger.removeHandler(handler)
        self.logger.addHandler(NoopHandler())
        self.logger.propagate = False

    def patch_config(self, options: dict):
        """
        Patch Odoo's config with the given `options`, ensuring that the patch
        is undone when the test completes.
        """
        _config_patcher = patch.dict(
            in_dict=config.options,
            values=options,
        )
        _config_patcher.start()
        self.addCleanup(_config_patcher.stop)

    def log(self, level, msg, exc_info=None):
        self.logger.log(level, msg, exc_info=exc_info)

    def assertEventCaptured(self, client, event_level, event_msg):
        self.assertTrue(
            client.transport.has_event(event_level, event_msg),
            msg='Event: "%s" was not captured' % event_msg,
        )

    def assertEventNotCaptured(self, client, event_level, event_msg):
        self.assertFalse(
            client.transport.has_event(event_level, event_msg),
            msg='Event: "%s" was captured' % event_msg,
        )

    def test_initialize_raven_sets_dsn(self):
        self.assertEqual(self.client.dsn, self.dsn)

    def test_ignore_low_level_event(self):
        level, msg = logging.WARNING, "Test event, can be ignored"
        self.log(level, msg)
        level = "warning"
        self.assertEventNotCaptured(self.client, level, msg)

    def test_capture_event(self):
        level, msg = logging.ERROR, "Test event, should be captured"
        self.log(level, msg)
        level = "error"
        self.assertEventCaptured(self.client, level, msg)

    def test_capture_event_exc(self):
        level, msg = logging.ERROR, "Test event, can be ignored exception"
        try:
            raise TestException(msg)
        except TestException:
            exc_info = sys.exc_info()
        self.log(level, msg, exc_info)
        level = "error"
        self.assertEventCaptured(self.client, level, msg)

    def test_ignore_exceptions(self):
        self.patch_config(
            {
                "sentry_ignore_exceptions": "odoo.exceptions.UserError",
            }
        )
        client = initialize_sentry(config)._client
        client.transport = InMemoryTransport({"dsn": self.dsn})
        level, msg = logging.ERROR, "Test exception"
        try:
            raise exceptions.UserError(msg)
        except exceptions.UserError:
            exc_info = sys.exc_info()
        self.log(level, msg, exc_info)
        level = "error"
        self.assertEventNotCaptured(client, level, msg)

    def test_exclude_logger(self):
        self.patch_config(
            {
                "sentry_enabled": True,
                "sentry_exclude_loggers": self.logger.name,
            }
        )
        client = initialize_sentry(config)._client
        client.transport = InMemoryTransport({"dsn": self.dsn})
        level, msg = logging.ERROR, "Test exclude logger %s" % __name__
        self.log(level, msg)
        level = "error"
        # Revert ignored logger so it doesn't affect other tests
        remove_handler_ignore(self.logger.name)
        self.assertEventNotCaptured(client, level, msg)

    @patch("odoo.addons.sentry.hooks.get_odoo_commit", return_value=GIT_SHA)
    def test_config_odoo_dir(self, get_odoo_commit):
        self.patch_config({"sentry_odoo_dir": "/opt/odoo/core"})
        client = initialize_sentry(config)._client

        self.assertEqual(
            client.options["release"],
            GIT_SHA,
            "Failed to use 'sentry_odoo_dir' parameter appropriately",
        )

    @patch("odoo.addons.sentry.hooks.get_odoo_commit", return_value=GIT_SHA)
    def test_config_release(self, get_odoo_commit):
        self.patch_config(
            {
                "sentry_odoo_dir": "/opt/odoo/core",
                "sentry_release": RELEASE,
            }
        )
        client = initialize_sentry(config)._client

        self.assertEqual(
            client.options["release"],
            RELEASE,
            "Failed to use 'sentry_release' parameter appropriately",
        )