import orjson

from zerver.lib.exceptions import JsonableError
from zerver.lib.recipient_parsing import extract_direct_message_recipient_ids, extract_stream_id
from zerver.lib.test_classes import ZulipTestCase


class TestRecipientParsing(ZulipTestCase):
    def test_extract_stream_id(self) -> None:
        # stream message recipient = single stream ID.
        stream_id = extract_stream_id("1")
        self.assertEqual(stream_id, 1)

        with self.assertRaisesRegex(JsonableError, "Invalid data type for channel ID"):
            extract_stream_id("1,2")

        with self.assertRaisesRegex(JsonableError, "Invalid data type for channel ID"):
            extract_stream_id("[1]")

        with self.assertRaisesRegex(JsonableError, "Invalid data type for channel ID"):
            extract_stream_id("general")

    def test_extract_recipient_ids(self) -> None:
        # direct message recipients = user IDs.
        user_ids = "[3,2,1]"
        result = sorted(extract_direct_message_recipient_ids(user_ids))
        self.assertEqual(result, [1, 2, 3])

        # JSON list w/duplicates
        user_ids = orjson.dumps([3, 3, 12]).decode()
        result = sorted(extract_direct_message_recipient_ids(user_ids))
        self.assertEqual(result, [3, 12])

        # Invalid data
        user_ids = "1, 12"
        with self.assertRaisesRegex(JsonableError, "Invalid data type for recipients"):
            extract_direct_message_recipient_ids(user_ids)

        user_ids = orjson.dumps(dict(recipient=12)).decode()
        with self.assertRaisesRegex(JsonableError, "Invalid data type for recipients"):
            extract_direct_message_recipient_ids(user_ids)

        # Heterogeneous lists are not supported
        user_ids = orjson.dumps([3, 4, "eeshan@example.com"]).decode()
        with self.assertRaisesRegex(JsonableError, "Recipient list may only contain user IDs"):
            extract_direct_message_recipient_ids(user_ids)