from __future__ import annotations

from datetime import datetime

import pytest

from yuxi.channels.adapters.qqbot.thread_simulator import QQBotThreadSimulator
from yuxi.channels.adapters.irc.thread_simulator import IRCThreadSimulator


class TestQQBotThreadSimulator:
    def test_resolve_c2c_thread_id(self):
        simulator = QQBotThreadSimulator()
        msg = {
            "message_type": "c2c",
            "author": {"id": "user_openid_123"},
            "seq": 25,
        }
        tid = simulator.resolve_simulated_thread_id(msg)
        assert "qqbot:c2c" in tid
        assert "user_openid_123" in tid
        assert "seq" in tid

    def test_resolve_group_thread_id(self):
        simulator = QQBotThreadSimulator()
        msg = {
            "message_type": "group",
            "group_id": "group_456",
            "seq": 30,
        }
        tid = simulator.resolve_simulated_thread_id(msg)
        assert "qqbot:group" in tid
        assert "group_456" in tid

    def test_build_thread_context_empty(self):
        simulator = QQBotThreadSimulator()
        context = simulator.build_thread_context(
            {"id": "m1", "author": {"username": "alice"}, "content": "hello"},
            "session_c2c_openid",
        )
        assert context == ""

    def test_build_thread_context_has_history(self):
        simulator = QQBotThreadSimulator(window_size=5)
        session_key = "session_c2c_openid"
        simulator.build_thread_context(
            {"id": "m1", "author": {"username": "alice"}, "content": "msg1"},
            session_key,
        )
        context = simulator.build_thread_context(
            {"id": "m2", "author": {"username": "bob"}, "content": "msg2"},
            session_key,
        )
        assert "alice: msg1" in context
        assert "bob: msg2" not in context

    def test_context_window_size_limit(self):
        simulator = QQBotThreadSimulator(window_size=3)
        session_key = "session_test"
        for i in range(5):
            simulator.build_thread_context(
                {"id": f"m{i}", "author": {"username": f"user{i}"}, "content": f"msg{i}"},
                session_key,
            )
        context = simulator.build_thread_context(
            {"id": "m_new", "author": {"username": "new"}, "content": "latest"},
            session_key,
        )
        assert "user0: msg0" not in context

    def test_get_context_as_history(self):
        simulator = QQBotThreadSimulator()
        session_key = "session_test"
        simulator.build_thread_context(
            {"id": "m1", "author": {"username": "alice"}, "content": "hello"},
            session_key,
        )
        history = simulator.get_context_as_history(session_key)
        assert len(history) == 1
        assert history[0].sender_name == "alice"


class TestIRCThreadSimulator:
    def test_add_channel_message(self):
        sim = IRCThreadSimulator(context_size=3)
        sim.add_message("#general", "alice", "hello world")
        context = sim.get_context_text("#general")
        assert "alice" in context
        assert "hello world" in context

    def test_add_dm_message(self):
        sim = IRCThreadSimulator(context_size=3)
        sim.add_message("alice", "alice", "hi bot", is_dm=True)
        context = sim.get_context_text("alice", is_dm=True)
        assert "alice" in context
        assert "hi bot" in context

    def test_context_size_limit(self):
        sim = IRCThreadSimulator(context_size=2)
        for i in range(4):
            sim.add_message("#general", f"user{i}", f"msg{i}")
        context = sim.get_context_text("#general")
        assert "user0" not in context
        assert "user2" in context
        assert "user3" in context

    def test_format_reply_prefix(self):
        result = IRCThreadSimulator.format_reply_prefix("bob")
        assert result == "@bob: "

    def test_clear_context(self):
        sim = IRCThreadSimulator()
        sim.add_message("#general", "alice", "hello")
        sim.clear_context("#general")
        context = sim.get_context_text("#general")
        assert context == ""

    def test_channel_dm_isolation(self):
        sim = IRCThreadSimulator()
        sim.add_message("#general", "alice", "public msg")
        sim.add_message("alice", "alice", "private msg", is_dm=True)

        channel_ctx = sim.get_context_text("#general")
        dm_ctx = sim.get_context_text("alice", is_dm=True)

        assert "public msg" in channel_ctx
        assert "private msg" not in channel_ctx
        assert "private msg" in dm_ctx
        assert "public msg" not in dm_ctx