import json
from unittest.mock import Mock

from app.db import SessionFactory
from app.db.message_oper import MessageOper
from app.db.models.message import Message
from app.chain import ChainBase
from app.helper.message import MessageHelper
from app.schemas import Notification
from app.schemas.types import NotificationType


def _clear_messages() -> None:
    """
    清空消息表，隔离通知测试数据。
    """
    with SessionFactory() as db:
        db.query(Message).delete()
        db.commit()


def _reset_message_helper(helper: MessageHelper) -> None:
    """
    清空单例消息队列和去重缓存，避免用例间互相影响。
    """
    while helper.get() is not None:
        pass
    helper._recent_notification_keys.clear()


def test_notification_history_only_lists_sent_messages() -> None:
    """
    通知历史应返回已发送消息，包含通过消息链登记的智能体消息。
    """
    _clear_messages()
    oper = MessageOper()
    oper.add(title="系统通知", text="下载完成", action=1, mtype=NotificationType.Download)
    oper.add(title="用户消息", text="帮我搜索", action=0)
    oper.add(title="智能体回复", text="已处理", action=1, mtype=NotificationType.Agent)

    messages = MessageOper().list_by_page(page=1, count=10)
    assert [message.title for message in messages if message.action == 1] == ["智能体回复", "系统通知"]


def test_web_message_history_returns_all_messages() -> None:
    """
    Web 消息历史返回消息表中的全部记录。
    """
    _clear_messages()
    oper = MessageOper()
    oper.add(title="智能体回复", text="已处理", action=1, mtype=NotificationType.Agent)
    oper.add(title="用户消息", text="/ai 帮我处理", action=0)
    oper.add(title="普通通知", text="下载完成", action=1, mtype=NotificationType.Download)

    messages = MessageOper().list_by_page(page=1, count=10)
    assert [message.title for message in messages] == ["普通通知", "用户消息", "智能体回复"]


def test_system_helper_message_only_enters_sse_queue() -> None:
    """
    系统实时消息只进入前端 SSE 队列，不写入通知历史。
    """
    _clear_messages()
    helper = MessageHelper()
    _reset_message_helper(helper)

    helper.put("调度任务执行失败", role="system", title="系统错误")

    assert MessageOper().list_by_page(page=1, count=10) == []
    realtime_message = json.loads(helper.get())
    assert realtime_message["type"] == "system"
    assert realtime_message["title"] == "系统错误"
    assert realtime_message["text"] == "调度任务执行失败"


def test_plugin_helper_message_deduplicates_recent_sse_messages() -> None:
    """
    短时间内相同插件实时消息只应推送一次，不写入通知历史。
    """
    _clear_messages()
    helper = MessageHelper()
    _reset_message_helper(helper)

    helper.put("站点刷流任务出错，获取下载器实例失败，请检查配置", role="plugin", title="站点刷流")
    helper.put("站点刷流任务出错，获取下载器实例失败，请检查配置", role="plugin", title="站点刷流")

    assert MessageOper().list_by_page(page=1, count=10) == []
    assert json.loads(helper.get())["title"] == "站点刷流"
    assert helper.get() is None


def test_agent_helper_message_does_not_enter_sse_queue() -> None:
    """
    智能体消息不进入前端 SSE 队列。
    """
    helper = MessageHelper()
    _reset_message_helper(helper)

    helper.put("智能体回复", role="agent", title="MoviePilot助手")

    assert helper.get() is None


def test_user_helper_message_does_not_enter_sse_queue() -> None:
    """
    用户消息不进入前端 SSE 队列。
    """
    helper = MessageHelper()
    _reset_message_helper(helper)

    helper.put("用户输入", role="user", title="admin")

    assert helper.get() is None


def test_notification_post_message_is_persisted_without_sse_queue() -> None:
    """
    业务通知通过消息链发送时只登记数据库，不进入前端 SSE 队列。
    """
    _clear_messages()
    helper = MessageHelper()
    _reset_message_helper(helper)
    chain = ChainBase()

    chain.messagequeue.send_message = Mock()
    chain.eventmanager.send_event = Mock()

    chain.post_message(
        Notification(
            mtype=NotificationType.Download,
            title="下载完成",
            text="影片已加入下载器",
        )
    )

    messages = MessageOper().list_by_page(page=1, count=10)
    assert len(messages) == 1
    assert messages[0].title == "下载完成"
    assert messages[0].mtype == NotificationType.Download.value
    assert helper.get() is None
    chain.messagequeue.send_message.assert_called_once()


def test_agent_notification_post_message_is_persisted_without_sse_queue() -> None:
    """
    智能体消息通过消息链发送时登记数据库，但不进入前端 SSE 队列。
    """
    _clear_messages()
    helper = MessageHelper()
    _reset_message_helper(helper)
    chain = ChainBase()

    chain.messagequeue.send_message = Mock()
    chain.eventmanager.send_event = Mock()

    chain.post_message(
        Notification(
            mtype=NotificationType.Agent,
            title="MoviePilot助手",
            text="已完成处理",
        )
    )

    messages = MessageOper().list_by_page(page=1, count=10)
    assert len(messages) == 1
    assert messages[0].title == "MoviePilot助手"
    assert messages[0].mtype == NotificationType.Agent.value
    assert helper.get() is None
    chain.messagequeue.send_message.assert_called_once()