"""Tests for spam detection rule behavior."""

import time
from collections import OrderedDict
from types import SimpleNamespace
from typing import Optional
from unittest.mock import MagicMock

from umabot.bot import UmaBot
from umabot.rules.spam_detector import SpamDetector


def make_submission(post_id: str, username: str, created_utc: Optional[float] = None):
    """Create a submission-like test object."""
    return SimpleNamespace(
        id=post_id,
        author=SimpleNamespace(name=username),
        created_utc=created_utc if created_utc is not None else time.time(),
    )


def make_config(max_posts_per_day: int = 3):
    """Create a minimal config-like object for tests."""
    return SimpleNamespace(
        max_posts_per_day=max_posts_per_day,
        subreddit_name="okbuddyumamusume",
    )


def test_spam_detector_removes_fourth_unique_post_same_day():
    """Fourth unique post in the same UTC day should be removed."""
    detector = SpamDetector(make_config())

    assert detector.should_remove(make_submission("p1", "alice")) is False
    assert detector.should_remove(make_submission("p2", "alice")) is False
    assert detector.should_remove(make_submission("p3", "alice")) is False
    assert detector.should_remove(make_submission("p4", "alice")) is True


def test_spam_detector_does_not_double_count_same_submission():
    """Seeing the same submission again should not increment the user's count."""
    detector = SpamDetector(make_config())
    submission = make_submission("p1", "alice")

    assert detector.should_remove(submission) is False
    assert detector.should_remove(submission) is False
    assert detector.should_remove(make_submission("p2", "alice")) is False
    assert detector.should_remove(make_submission("p3", "alice")) is False
    assert detector.should_remove(make_submission("p4", "alice")) is True


def test_spam_detector_ignores_old_submission_seen_today():
    """Old submissions should not be treated as today's posts."""
    detector = SpamDetector(make_config())
    two_days_ago = time.time() - (2 * 24 * 60 * 60)

    assert detector.should_remove(make_submission("old", "alice", two_days_ago)) is False
    assert detector.should_remove(make_submission("p1", "alice")) is False
    assert detector.should_remove(make_submission("p2", "alice")) is False
    assert detector.should_remove(make_submission("p3", "alice")) is False


def test_cleanup_processed_submissions_prunes_oldest_entries():
    """Processed submission cleanup should keep the most recently seen IDs."""
    bot = UmaBot.__new__(UmaBot)
    bot.logger = MagicMock()
    bot.processed_submissions = OrderedDict((str(i), None) for i in range(1005))

    UmaBot._cleanup_processed_submissions(bot)

    assert len(bot.processed_submissions) == 1000
    assert "0" not in bot.processed_submissions
    assert "4" not in bot.processed_submissions
    assert "5" in bot.processed_submissions