from __future__ import annotations

import asyncio
import time

import pytest

from yuxi.channels.adapters.imessage.echo_cache import (
    EchoCache,
    TEXT_TTL_S,
    MESSAGE_ID_TTL_S,
    SELF_CHAT_TTL_S,
    MAX_SELF_CHAT_ENTRIES,
)
from yuxi.channels.adapters.imessage.rate_limiter import LoopRateLimiter
from yuxi.channels.adapters.imessage.reflection_guard import ReflectionGuard


class TestEchoCache:
    @pytest.fixture
    def cache(self):
        return EchoCache()

    def test_initial_empty(self, cache):
        assert cache.is_echo(message_id="any") is False
        assert cache.is_echo(text="any") is False

    def test_record_and_detect_by_message_id(self, cache):
        cache.record_sent("msg_001", "Hello", "chat_001")
        assert cache.is_echo(message_id="msg_001") is True

    def test_record_and_detect_by_text(self, cache):
        cache.record_sent("msg_001", "Hello world", "chat_001")
        assert cache.is_echo(text="Hello world", chat_guid="chat_001") is True

    def test_no_false_positive_text(self, cache):
        cache.record_sent("msg_001", "Hello", "chat_001")
        assert cache.is_echo(text="Different", chat_guid="chat_001") is False

    def test_no_false_positive_different_chat(self, cache):
        cache.record_sent("msg_001", "Hello", "chat_001")
        assert cache.is_echo(text="Hello", chat_guid="chat_002") is False

    def test_record_and_detect_by_text_backed_by_id(self, cache):
        cache.record_sent("msg_001", "Hello", "chat_001")
        cache._by_message_id.clear()
        assert cache.is_echo(message_id="msg_001") is True

    def test_text_ttl_expiry(self, cache):
        cache._text_ttl = 0.01
        cache.record_sent("msg_001", "Hello", "chat_001")
        time.sleep(0.02)
        assert cache.is_echo(text="Hello", chat_guid="chat_001") is False

    def test_message_id_ttl_expiry(self, cache):
        cache._text_ttl = 0.01
        cache._text_backed_by_id_ttl = 0.01
        cache._msg_id_ttl = 0.01
        cache.record_sent("msg_001", "Hello", "chat_001")
        time.sleep(0.02)
        assert cache.is_echo(message_id="msg_001") is False

    def test_is_self_chat_echo_same_handle(self, cache):
        result = cache.is_self_chat_echo(
            "+8613800138000", "+8613800138000", "chat_001"
        )
        assert result is True

    def test_is_self_chat_echo_different_handle(self, cache):
        result = cache.is_self_chat_echo(
            "+8613800138000", "+8613900139000", "chat_001"
        )
        assert result is False

    def test_is_self_chat_echo_no_self_handle(self, cache):
        result = cache.is_self_chat_echo(
            "+8613800138000", "", "chat_001"
        )
        assert result is False

    def test_is_self_chat_echo_clean_handles(self, cache):
        result = cache.is_self_chat_echo(
            " +8613800138000 ", " +8613800138000 ", "chat_001"
        )
        assert result is True

    def test_record_self_chat_text(self, cache):
        cache.record_self_chat_text("Hello from self", "chat_001")
        assert cache.is_in_self_chat_cache("Hello from self", "chat_001") is True

    def test_record_self_chat_text_different_text(self, cache):
        cache.record_self_chat_text("Hello", "chat_001")
        assert cache.is_in_self_chat_cache("Different", "chat_001") is False

    def test_self_chat_ttl_expiry(self, cache):
        cache._self_chat_ttl = 0.01
        cache.record_self_chat_text("Hello", "chat_001")
        time.sleep(0.02)
        assert cache.is_in_self_chat_cache("Hello", "chat_001") is False

    def test_max_self_chat_entries(self, cache):
        cache._max_self_chat_entries = 5
        for i in range(10):
            cache.record_self_chat_text(f"msg_{i}", "chat_001")
        assert len(cache._self_chat_cache) <= 5

    def test_cleanup_removes_expired_text_backed_by_id(self, cache):
        cache._text_backed_by_id_ttl = 0.01
        cache.record_sent("msg_001", "Hello", "chat_001")
        time.sleep(0.02)
        cache._cleanup()
        assert "msg_001" not in cache._by_text_backed_by_id

    def test_default_ttls(self):
        cache = EchoCache()
        assert cache._text_ttl == TEXT_TTL_S
        assert cache._msg_id_ttl == MESSAGE_ID_TTL_S
        assert cache._self_chat_ttl == SELF_CHAT_TTL_S
        assert cache._max_self_chat_entries == MAX_SELF_CHAT_ENTRIES

    def test_multiple_messages_same_text(self, cache):
        cache.record_sent("msg_001", "Hello", "chat_001")
        cache.record_sent("msg_002", "Hello", "chat_001")
        assert cache.is_echo(message_id="msg_001") is True
        assert cache.is_echo(message_id="msg_002") is True
        assert cache.is_echo(text="Hello", chat_guid="chat_001") is True

    def test_is_echo_none_params(self, cache):
        assert cache.is_echo(message_id=None, text=None) is False


class TestLoopRateLimiter:
    @pytest.fixture
    def limiter(self):
        return LoopRateLimiter(max_loops=3, window_s=60.0, cooldown_s=1.0)

    def test_initial_not_suppressed(self, limiter):
        assert limiter.is_suppressed("conv_001") is False

    def test_single_hit_not_suppressed(self, limiter):
        result = limiter.check("conv_001", "content")
        assert result is False

    def test_multiple_hits_suppressed(self, limiter):
        for _ in range(3):
            limiter.check("conv_001", "content")
        result = limiter.check("conv_001", "content")
        assert result is True

    def test_different_conversation_separate(self, limiter):
        for _ in range(3):
            limiter.check("conv_001", "content")
        result = limiter.check("conv_002", "content")
        assert result is False

    def test_is_suppressed_after_hits(self, limiter):
        for _ in range(3):
            limiter.check("conv_001", "content")
        assert limiter.is_suppressed("conv_001") is True

    def test_cooldown_expires(self, limiter):
        limiter._cooldown_s = 0.01
        for _ in range(3):
            limiter.check("conv_001", "content")
        assert limiter.is_suppressed("conv_001") is True
        time.sleep(0.02)
        assert limiter.is_suppressed("conv_001") is False

    def test_reset(self, limiter):
        for _ in range(2):
            limiter.check("conv_001", "content")
        limiter.reset("conv_001")
        result = limiter.check("conv_001", "content")
        assert result is False

    def test_reset_unknown_key(self, limiter):
        limiter.reset("nonexistent")

    def test_window_sliding(self, limiter):
        limiter._window_s = 0.01
        for _ in range(2):
            limiter.check("conv_001", "content")
        time.sleep(0.02)
        result = limiter.check("conv_001", "content")
        assert result is False

    def test_default_params(self):
        limiter = LoopRateLimiter()
        assert limiter._max_loops == 5
        assert limiter._window_s == 30.0
        assert limiter._cooldown_s == 60.0

    def test_check_within_window(self, limiter):
        for _ in range(2):
            limiter.check("conv_001", "content")
        result = limiter.check("conv_001", "content")
        assert result is True


class TestReflectionGuard:
    @pytest.fixture
    def guard(self):
        return ReflectionGuard()

    def test_initial_state(self, guard):
        assert guard.blocked_count == 0

    def test_is_not_reflection_normal_text(self, guard):
        assert guard.is_reflection("Hello world") is False

    def test_is_not_reflection_short_text(self, guard):
        assert guard.is_reflection("Hi") is False

    def test_mark_blocked(self, guard):
        guard.mark_blocked()
        assert guard.blocked_count == 1
        guard.mark_blocked()
        assert guard.blocked_count == 2

    def test_blocked_count_starts_at_zero(self, guard):
        assert guard.blocked_count == 0
        guard.mark_blocked()
        guard.mark_blocked()
        assert guard.blocked_count == 2