import base64
from typing import Tuple, Optional
from urllib.parse import urljoin

from lxml import etree

from app.chain import ChainBase
from app.core.config import settings
from app.db.siteicon_oper import SiteIconOper
from app.db.site_oper import SiteOper
from app.helper.cookiecloud import CookieCloudHelper
from app.helper.sites import SitesHelper
from app.log import logger
from app.utils.http import RequestUtils


class CookieCloudChain(ChainBase):
    """
    同步站点Cookie
    """

    def __init__(self):
        super().__init__()
        self.siteoper = SiteOper()
        self.siteiconoper = SiteIconOper()
        self.siteshelper = SitesHelper()
        self.cookiecloud = CookieCloudHelper(
            server=settings.COOKIECLOUD_HOST,
            key=settings.COOKIECLOUD_KEY,
            password=settings.COOKIECLOUD_PASSWORD
        )

    def process(self) -> Tuple[bool, str]:
        """
        通过CookieCloud同步站点Cookie
        """
        logger.info("开始同步CookieCloud站点 ...")
        cookies, msg = self.cookiecloud.download()
        if not cookies:
            logger.error(f"CookieCloud同步失败：{msg}")
            return False, msg
        # 保存Cookie或新增站点
        _update_count = 0
        _add_count = 0
        for domain, cookie in cookies.items():
            # 获取站点信息
            indexer = self.siteshelper.get_indexer(domain)
            if self.siteoper.exists(domain):
                # 更新站点Cookie
                self.siteoper.update_cookie(domain=domain, cookies=cookie)
                _update_count += 1
            elif indexer:
                # 新增站点
                self.siteoper.add(name=indexer.get("name"),
                                  url=indexer.get("domain"),
                                  domain=domain,
                                  cookie=cookie)
                _add_count += 1
            # 保存站点图标
            if indexer:
                icon_url, icon_base64 = self.__parse_favicon(url=indexer.get("domain"),
                                                             cookie=cookie,
                                                             ua=settings.USER_AGENT)
                if icon_url:
                    self.siteiconoper.update_icon(name=indexer.get("name"),
                                                  domain=domain,
                                                  icon_url=icon_url,
                                                  icon_base64=icon_base64)
        # 处理完成
        ret_msg = f"更新了{_update_count}个站点，新增了{_add_count}个站点"
        logger.info(f"CookieCloud同步成功：{ret_msg}")
        return True, ret_msg

    @staticmethod
    def __parse_favicon(url: str, cookie: str, ua: str) -> Tuple[str, Optional[str]]:
        """
        解析站点favicon,返回base64 fav图标
        :param url: 站点地址
        :param cookie: Cookie
        :param ua: User-Agent
        :return:
        """
        favicon_url = urljoin(url, "favicon.ico")
        res = RequestUtils(cookies=cookie, timeout=60, ua=ua).get_res(url=url)
        if res:
            html_text = res.text
        else:
            logger.error(f"获取站点页面失败：{url}")
            return favicon_url, None
        html = etree.HTML(html_text)
        if html:
            fav_link = html.xpath('//head/link[contains(@rel, "icon")]/@href')
            if fav_link:
                favicon_url = urljoin(url, fav_link[0])

        res = RequestUtils(cookies=cookie, timeout=20, ua=ua).get_res(url=favicon_url)
        if res:
            return favicon_url, base64.b64encode(res.content).decode()
        else:
            logger.error(f"获取站点图标失败：{favicon_url}")
        return favicon_url, None