import json
from typing import Union, Any, List

from fastapi import APIRouter, BackgroundTasks, Depends
from fastapi import Request
from pywebpush import WebPushException, webpush
from sqlalchemy.orm import Session
from starlette.responses import PlainTextResponse

from app import schemas
from app.chain.message import MessageChain
from app.core.config import settings, global_vars
from app.core.security import verify_token
from app.db import get_db
from app.db.models import User
from app.db.models.message import Message
from app.db.systemconfig_oper import SystemConfigOper
from app.db.userauth import get_current_active_superuser
from app.log import logger
from app.modules.wechat.WXBizMsgCrypt3 import WXBizMsgCrypt
from app.schemas import NotificationSwitch
from app.schemas.types import SystemConfigKey, NotificationType, MessageChannel

router = APIRouter()


def start_message_chain(body: Any, form: Any, args: Any):
    """
    启动链式任务
    """
    MessageChain().process(body=body, form=form, args=args)


@router.post("/", summary="接收用户消息", response_model=schemas.Response)
async def user_message(background_tasks: BackgroundTasks, request: Request):
    """
    用户消息响应
    """
    body = await request.body()
    form = await request.form()
    args = request.query_params
    background_tasks.add_task(start_message_chain, body, form, args)
    return schemas.Response(success=True)


@router.post("/web", summary="接收WEB消息", response_model=schemas.Response)
def web_message(text: str, current_user: User = Depends(get_current_active_superuser)):
    """
    WEB消息响应
    """
    MessageChain().handle_message(
        channel=MessageChannel.Web,
        userid=current_user.name,
        username=current_user.name,
        text=text
    )
    return schemas.Response(success=True)


@router.get("/web", summary="获取WEB消息", response_model=List[dict])
def get_web_message(_: schemas.TokenPayload = Depends(verify_token),
                    db: Session = Depends(get_db),
                    page: int = 1,
                    count: int = 20):
    """
    获取WEB消息列表
    """
    ret_messages = []
    messages = Message.list_by_page(db, page=page, count=count)
    for message in messages:
        try:
            ret_messages.append(message.to_dict())
        except Exception as e:
            logger.error(f"获取WEB消息列表失败: {str(e)}")
            continue
    return ret_messages


def wechat_verify(echostr: str, msg_signature: str,
                  timestamp: Union[str, int], nonce: str) -> Any:
    """
    微信验证响应
    """
    try:
        wxcpt = WXBizMsgCrypt(sToken=settings.WECHAT_TOKEN,
                              sEncodingAESKey=settings.WECHAT_ENCODING_AESKEY,
                              sReceiveId=settings.WECHAT_CORPID)
    except Exception as err:
        logger.error(f"微信请求验证失败: {str(err)}")
        return str(err)
    ret, sEchoStr = wxcpt.VerifyURL(sMsgSignature=msg_signature,
                                    sTimeStamp=timestamp,
                                    sNonce=nonce,
                                    sEchoStr=echostr)
    if ret != 0:
        logger.error("微信请求验证失败 VerifyURL ret: %s" % str(ret))
    # 验证URL成功，将sEchoStr返回给企业号
    return PlainTextResponse(sEchoStr)


def vocechat_verify(token: str) -> Any:
    """
    VoceChat验证响应
    """
    if token == settings.API_TOKEN:
        return {"status": "OK"}
    return {"status": "ERROR"}


@router.get("/", summary="回调请求验证")
def incoming_verify(token: str = None, echostr: str = None, msg_signature: str = None,
                    timestamp: Union[str, int] = None, nonce: str = None) -> Any:
    """
    微信/VoceChat等验证响应
    """
    logger.info(f"收到验证请求: token={token}, echostr={echostr}, "
                f"msg_signature={msg_signature}, timestamp={timestamp}, nonce={nonce}")
    if echostr and msg_signature and timestamp and nonce:
        return wechat_verify(echostr, msg_signature, timestamp, nonce)
    return vocechat_verify(token)


@router.get("/switchs", summary="查询通知消息渠道开关", response_model=List[NotificationSwitch])
def read_switchs(_: schemas.TokenPayload = Depends(verify_token)) -> Any:
    """
    查询通知消息渠道开关
    """
    return_list = []
    # 读取数据库
    switchs = SystemConfigOper().get(SystemConfigKey.NotificationChannels)
    if not switchs:
        for noti in NotificationType:
            return_list.append(NotificationSwitch(mtype=noti.value, wechat=True,
                                                  telegram=True, slack=True,
                                                  synologychat=True, vocechat=True))
    else:
        for switch in switchs:
            return_list.append(NotificationSwitch(**switch))
        for noti in NotificationType:
            if not any([x.mtype == noti.value for x in return_list]):
                return_list.append(NotificationSwitch(mtype=noti.value, wechat=True,
                                                      telegram=True, slack=True,
                                                      synologychat=True, vocechat=True))
    return return_list


@router.post("/switchs", summary="设置通知消息渠道开关", response_model=schemas.Response)
def set_switchs(switchs: List[NotificationSwitch],
                _: schemas.TokenPayload = Depends(verify_token)) -> Any:
    """
    设置通知消息渠道开关
    """
    switch_list = []
    for switch in switchs:
        switch_list.append(switch.dict())
    # 存入数据库
    SystemConfigOper().set(SystemConfigKey.NotificationChannels, switch_list)

    return schemas.Response(success=True)


@router.post("/webpush/subscribe", summary="客户端webpush通知订阅", response_model=schemas.Response)
def subscribe(subscription: schemas.Subscription, _: schemas.TokenPayload = Depends(verify_token)):
    """
    客户端webpush通知订阅
    """
    subinfo = subscription.dict()
    if subinfo not in global_vars.get_subscriptions():
        global_vars.push_subscription(subinfo)
    logger.debug(f"通知订阅成功: {subinfo}")
    return schemas.Response(success=True)


@router.post("/webpush/send", summary="发送webpush通知", response_model=schemas.Response)
def send_notification(payload: schemas.SubscriptionMessage, _: schemas.TokenPayload = Depends(verify_token)):
    """
    发送webpush通知
    """
    for sub in global_vars.get_subscriptions():
        try:
            webpush(
                subscription_info=sub,
                data=json.dumps(payload.dict()),
                vapid_private_key=settings.VAPID.get("privateKey"),
                vapid_claims={
                    "sub": settings.VAPID.get("subject")
                },
            )
        except WebPushException as err:
            logger.error(f"WebPush发送失败: {str(err)}")
            continue
    return schemas.Response(success=True)