import json
from typing import Any, Dict, Tuple, Optional

from app.runtime.log import logger
from app.runtime.settings import get_runtime_setting
from app.foundation.crypto import CryptoJsUtils, HashUtils
from app.adapters.network.http import RequestUtils
from app.domain import site as site_rules
from app.foundation import text as text_tools
from app.foundation.url import UrlUtils


def _runtime_setting(key: str) -> Any:
    """读取 CookieCloud 配置服务，未装配时回退旧 Settings ABI。"""
    return get_runtime_setting(key)


class CookieCloudHelper:
    """负责 CookieCloud 配置同步、下载和本地数据解析。"""

    _ignore_cookies: list = ["CookieAutoDeleteBrowsingDataCleanup", "CookieAutoDeleteCleaningDiscarded"]

    def __init__(self):
        """加载当前 CookieCloud 配置。"""
        self.__sync_setting()

    def __sync_setting(self):
        """
        同步CookieCloud配置项
        """
        self._server = UrlUtils.standardize_base_url(_runtime_setting("COOKIECLOUD_HOST"))
        self._key = text_tools.strip_optional(_runtime_setting("COOKIECLOUD_KEY"))
        self._password = text_tools.strip_optional(_runtime_setting("COOKIECLOUD_PASSWORD"))
        self._enable_local = _runtime_setting("COOKIECLOUD_ENABLE_LOCAL")
        self._local_path = _runtime_setting("COOKIE_PATH")

    def download(self) -> Tuple[Optional[dict], str]:
        """
        从CookieCloud下载数据
        :return: Cookie数据、错误信息
        """
        # 更新为最新设置
        self.__sync_setting()

        if ((not self._server and not self._enable_local)
                or not self._key
                or not self._password):
            return None, "CookieCloud参数不正确"

        if self._enable_local:
            # 开启本地服务时，从本地直接读取数据
            result = self.__load_local_encrypt_data(self._key)
            if not result:
                return {}, "未从本地CookieCloud服务加载到cookie数据，请检查服务器设置、用户KEY及加密密码是否正确"
        else:
            req_url = UrlUtils.combine_url(host=self._server, path=f"get/{self._key}")
            ret = RequestUtils(content_type="application/json").get_res(url=req_url)
            if ret and ret.status_code == 200:
                try:
                    result = ret.json()
                    if not result:
                        return {}, f"未从{self._server}下载到cookie数据"
                except Exception as err:
                    return {}, f"从{self._server}下载cookie数据错误：{str(err)}"
            elif ret:
                return None, f"远程同步CookieCloud失败，错误码：{ret.status_code}"
            else:
                return None, "CookieCloud请求失败，请检查服务器地址、用户KEY及加密密码是否正确"

        encrypted = result.get("encrypted")
        if not encrypted:
            return {}, "未获取到cookie密文"
        else:
            crypt_key = self.__get_crypt_key()
            try:
                decrypted_data = CryptoJsUtils.decrypt(encrypted, crypt_key).decode("utf-8")
                result = json.loads(decrypted_data)
            except Exception as e:
                return {}, "cookie解密失败：" + str(e)

        if not result:
            return {}, "cookie解密为空"

        if result.get("cookie_data"):
            contents = result.get("cookie_data")
        else:
            contents = result
        # 整理数据,使用domain域名的最后两级作为分组依据
        domain_groups = {}
        for site, cookies in contents.items():
            for cookie in cookies:
                domain_key = site_rules.extract_domain(cookie.get("domain"))
                if not domain_groups.get(domain_key):
                    domain_groups[domain_key] = [cookie]
                else:
                    domain_groups[domain_key].append(cookie)
        # 返回错误
        ret_cookies = {}
        # 索引器
        for domain, content_list in domain_groups.items():
            if not content_list:
                continue
            # 只有cf的cookie过滤掉
            cloudflare_cookie = True
            for content in content_list:
                if content["name"] != "cf_clearance":
                    cloudflare_cookie = False
                    break
            if cloudflare_cookie:
                continue
            # 站点Cookie
            cookie_str = ";".join(
                [f"{content.get('name')}={content.get('value')}"
                 for content in content_list
                 if content.get("name") and content.get("name") not in self._ignore_cookies]
            )
            ret_cookies[domain] = cookie_str
        return ret_cookies, ""

    def __get_crypt_key(self) -> bytes:
        """
        使用UUID和密码生成CookieCloud的加解密密钥
        """
        combined_string = f"{self._key}-{self._password}"
        return HashUtils.md5(combined_string)[:16].encode("utf-8")

    def __load_local_encrypt_data(self, uuid: str) -> Dict[str, Any]:
        """
        获取本地CookieCloud数据
        """
        file_path = self._local_path / f"{uuid}.json"
        # 检查文件是否存在
        if not file_path.exists():
            logger.warn(f"本地CookieCloud文件不存在：{file_path}")
            return {}

        # 读取文件
        with open(file_path, encoding="utf-8", errors="replace", mode="r") as file:
            read_content = file.read()
        data = json.loads(read_content.encode("utf-8"))
        return data