from fastapi import FastAPI, Response, Cookie
from datetime import datetime
import aiohttp
import json
from . import db
from typing import Annotated
from .cfg import config


FL_SERVER = config["flarum"]["fl_server"]
FL_APIKEY = config["flarum"]["fl_apikey"]


def main(app: FastAPI, ROOT: str, apikeys: dict):

    async def check_apikey(tkn: str):
        res = apikeys.get(tkn, None)
        if (res is None):
            return ""
        if (res[1] < datetime.now()):
            del apikeys[tkn]
            return ""
        return res[0]

    @app.get("/app/flarum/patch.js")
    async def patchjson():
        return Response("""
        setTimeout(function() {
            var signup_obj = document.getElementsByClassName(
                "item-logIn")[0]
            if(signup_obj!=undefined){
                signup_obj.style.display = "none";
            }
            var btn_obj=document.getElementsByClassName("item-logIn")[0]
            if(btn_obj != undefined){
            btn_obj.innerHTML = "<a href='"""+ROOT+"""/login?redirect_url="+window.location.href+"'>注册/登录</a>"}
        }, 500);
        

        setTimeout(function() {
            var hashs = window.location.hash
            if(hashs!==""){
                var exp=/(?<=#access_token\\=).*(?=&token_type)/g
                var res = hashs.match(exp)
                if(res!=null){
                    var key = res[0]
                    var xhr = new XMLHttpRequest()
                    var csrf = JSON.parse(document.getElementById("flarum-json-payload").innerText)["session"]["csrfToken"]
                    xhr.open('post','/app/flarum/login?apikey='+key+'&csrftoken='+csrf);
                    xhr.onreadyStatechange = function () {
                        if(xhr.readyState === 4 && xhr.status === 200) {
                            console.log(xhr.responseText)
                            window.location.hash = ""
                            location.reload()
                        }
                    }
                    xhr.send()
                }
            }
        }, 1000);
        """, 200, None, media_type="application/javascript")

    @app.post("/app/flarum/login")
    async def login(apikey: str, csrftoken: str, resp: Response, flarum_session: Annotated[str | None, Cookie()] = None):
        username = await check_apikey(apikey)
        if (username == ""):
            return {"msg": "token无效"}
        if (flarum_session is None):
            return {"msg": "session无效"}
        user_passwd = await db.get_user_passwd(username)
        data_obj = {"data":
                    {"attributes":
                     {
                         "username": username,
                         "email": await db.get_email(username),
                         "isEmailConfirmed": True,
                         "password": user_passwd
                     }
                     }
                    }
        headers = {
            "Authorization": f"Token {FL_APIKEY}",
            "Content-Type": "application/json;charset=utf-8"
        }
        async with aiohttp.ClientSession() as session:
            async with session.post(FL_SERVER+"/api/users", headers=headers, data=json.dumps(data_obj)) as response:
                if (response.status != 201):
                    pass
        data_obj = {
            "identification": username,
            "password": user_passwd,
            "remember": True
        }
        headers = {
            "Authorization": f"Token {FL_APIKEY}",
            "Content-Type": "application/json;charset=utf-8",
            "Cookie": f"flarum_session={flarum_session}",
            "X-Csrf-Token": csrftoken
        }

        async with aiohttp.ClientSession() as session:
            async with session.post(FL_SERVER+"/login", headers=headers, data=json.dumps(data_obj)) as response:
                cookies = response.cookies
                flarum_session = cookies.get('flarum_session')
                flarum_remember = cookies.get('flarum_remember')
                resp.set_cookie("flarum_session", flarum_session)
                resp.set_cookie("flarum_remember", flarum_remember)
        return {"msg": ""}