import unittest

from mail_imap_ops import destination_from_header
from sort_mail_daemon import mark_processed, processed_set, reset_on_uidvalidity_change


class SortMailDaemonTests(unittest.TestCase):
    def test_destination_from_header_routes_ai_provider(self):
        header = (
            b"From: Claude Team <hello@claude.com>\r\n"
            b"Subject: Product update\r\n"
            b"Date: Tue, 01 Jul 2025 10:00:00 +0000\r\n"
            b"\r\n"
        )
        self.assertEqual(destination_from_header(header), "INBOX.Diensten.AI.Claude")

    def test_destination_from_header_routes_invoice_by_quarter(self):
        header = (
            b"From: Billing <billing@example.com>\r\n"
            b"Subject: Your invoice\r\n"
            b"Date: Tue, 15 Apr 2025 10:00:00 +0000\r\n"
            b"\r\n"
        )
        self.assertEqual(destination_from_header(header), "INBOX.Financieel.Facturen.2025.Q2")

    def test_destination_from_header_returns_none_for_unmatched(self):
        header = (
            b"From: Person <person@example.invalid>\r\n"
            b"Subject: Hello\r\n"
            b"Date: Tue, 01 Jul 2025 10:00:00 +0000\r\n"
            b"\r\n"
        )
        self.assertIsNone(destination_from_header(header))

    def test_uidvalidity_change_resets_processed_uids(self):
        state = {"folder_state": {"INBOX": {"uidvalidity": "1", "processed_uids": ["10"]}}}
        reset_on_uidvalidity_change(state, "INBOX", "2")
        self.assertEqual(processed_set(state, "INBOX"), set())
        self.assertEqual(state["folder_state"]["INBOX"]["uidvalidity"], "2")

    def test_mark_processed_is_idempotent(self):
        state = {"folder_state": {}}
        mark_processed(state, "INBOX", "2")
        mark_processed(state, "INBOX", "2")
        mark_processed(state, "INBOX", "1")
        self.assertEqual(state["folder_state"]["INBOX"]["processed_uids"], ["1", "2"])


if __name__ == "__main__":
    unittest.main()