# 声明：本代码仅供学习和研究目的使用。使用者应遵守以下原则：  
# 1. 不得用于任何商业用途。  
# 2. 使用时应遵守目标平台的使用条款和robots.txt规则。  
# 3. 不得进行大规模爬取或对平台造成运营干扰。  
# 4. 应合理控制请求频率，避免给目标平台带来不必要的负担。   
# 5. 不得用于任何非法或不当的用途。
#   
# 详细许可条款请参阅项目根目录下的LICENSE文件。  
# 使用本代码即表示您同意遵守上述原则和LICENSE中的所有条款。  


# -*- coding: utf-8 -*-
import asyncio
import json
from typing import Any, Callable, Dict, List, Optional
from urllib.parse import urlencode

import httpx
from playwright.async_api import BrowserContext, Page

import config
from base.base_crawler import AbstractApiClient
from tools import utils

from .exception import DataFetchError
from .graphql import KuaiShouGraphQL


class KuaiShouClient(AbstractApiClient):
    def __init__(
            self,
            timeout=10,
            proxies=None,
            *,
            headers: Dict[str, str],
            playwright_page: Page,
            cookie_dict: Dict[str, str],
    ):
        self.proxies = proxies
        self.timeout = timeout
        self.headers = headers
        self._host = "https://www.kuaishou.com/graphql"
        self.playwright_page = playwright_page
        self.cookie_dict = cookie_dict
        self.graphql = KuaiShouGraphQL()

    async def request(self, method, url, **kwargs) -> Any:
        async with httpx.AsyncClient(proxies=self.proxies) as client:
            response = await client.request(
                method, url, timeout=self.timeout,
                **kwargs
            )
        data: Dict = response.json()
        if data.get("errors"):
            raise DataFetchError(data.get("errors", "unkonw error"))
        else:
            return data.get("data", {})

    async def get(self, uri: str, params=None) -> Dict:
        final_uri = uri
        if isinstance(params, dict):
            final_uri = (f"{uri}?"
                         f"{urlencode(params)}")
        return await self.request(method="GET", url=f"{self._host}{final_uri}", headers=self.headers)

    async def post(self, uri: str, data: dict) -> Dict:
        json_str = json.dumps(data, separators=(',', ':'), ensure_ascii=False)
        return await self.request(method="POST", url=f"{self._host}{uri}",
                                  data=json_str, headers=self.headers)

    async def pong(self) -> bool:
        """get a note to check if login state is ok"""
        utils.logger.info("[KuaiShouClient.pong] Begin pong kuaishou...")
        ping_flag = False
        try:
            post_data = {
                "operationName": "visionProfileUserList",
                "variables": {
                    "ftype": 1,
                },
                "query": self.graphql.get("vision_profile_user_list")
            }
            res = await self.post("", post_data)
            if res.get("visionProfileUserList", {}).get("result") == 1:
                ping_flag = True
        except Exception as e:
            utils.logger.error(f"[KuaiShouClient.pong] Pong kuaishou failed: {e}, and try to login again...")
            ping_flag = False
        return ping_flag

    async def update_cookies(self, browser_context: BrowserContext):
        cookie_str, cookie_dict = utils.convert_cookies(await browser_context.cookies())
        self.headers["Cookie"] = cookie_str
        self.cookie_dict = cookie_dict

    async def search_info_by_keyword(self, keyword: str, pcursor: str):
        """
        KuaiShou web search api
        :param keyword: search keyword
        :param pcursor: limite page curson
        :return:
        """
        post_data = {
            "operationName": "visionSearchPhoto",
            "variables": {
                "keyword": keyword,
                "pcursor": pcursor,
                "page": "search"
            },
            "query": self.graphql.get("search_query")
        }
        return await self.post("", post_data)

    async def get_video_info(self, photo_id: str) -> Dict:
        """
        Kuaishou web video detail api
        :param photo_id:
        :return:
        """
        post_data = {
            "operationName": "visionVideoDetail",
            "variables": {
                "photoId": photo_id,
                "page": "search"
            },
            "query": self.graphql.get("video_detail")
        }
        return await self.post("", post_data)

    async def get_video_comments(self, photo_id: str, pcursor: str = "") -> Dict:
        """get video comments
        :param photo_id: photo id you want to fetch
        :param pcursor: last you get pcursor, defaults to ""
        :return:
        """
        post_data = {
            "operationName": "commentListQuery",
            "variables": {
                "photoId": photo_id,
                "pcursor": pcursor
            },
            "query": self.graphql.get("comment_list")
        }
        return await self.post("", post_data)

    async def get_video_sub_comments(
        self, photo_id: str, rootCommentId: str, pcursor: str = ""
    ) -> Dict:
        """get video sub comments
        :param photo_id: photo id you want to fetch
        :param pcursor: last you get pcursor, defaults to ""
        :return:
        """
        post_data = {
            "operationName": "visionSubCommentList",
            "variables": {
                "photoId": photo_id,
                "pcursor": pcursor,
                "rootCommentId": rootCommentId,
            },
            "query": self.graphql.get("vision_sub_comment_list"),
        }
        return await self.post("", post_data)

    async def get_creator_profile(self, userId: str) -> Dict:
        post_data = {
            "operationName": "visionProfile",
            "variables": {
                "userId": userId
            },
            "query": self.graphql.get("vision_profile"),
        }
        return await self.post("", post_data)

    async def get_video_by_creater(self, userId: str, pcursor: str = "") -> Dict:
        post_data = {
            "operationName": "visionProfilePhotoList",
            "variables": {
                "page": "profile", 
                "pcursor": pcursor, 
                "userId": userId
            },
            "query": self.graphql.get("vision_profile_photo_list"),
        }
        return await self.post("", post_data)

    async def get_video_all_comments(
        self,
        photo_id: str,
        crawl_interval: float = 1.0,
        callback: Optional[Callable] = None,
    ):
        """
        get video all comments include sub comments
        :param photo_id:
        :param crawl_interval:
        :param callback:
        :return:
        """

        result = []
        pcursor = ""

        while pcursor != "no_more":
            comments_res = await self.get_video_comments(photo_id, pcursor)
            vision_commen_list = comments_res.get("visionCommentList", {})
            pcursor = vision_commen_list.get("pcursor", "")
            comments = vision_commen_list.get("rootComments", [])

            if callback:  # 如果有回调函数，就执行回调函数
                await callback(photo_id, comments)

            result.extend(comments)
            await asyncio.sleep(crawl_interval)
            sub_comments = await self.get_comments_all_sub_comments(
                comments, photo_id, crawl_interval, callback
            )
            result.extend(sub_comments)
        return result

    async def get_comments_all_sub_comments(
        self,
        comments: List[Dict],
        photo_id,
        crawl_interval: float = 1.0,
        callback: Optional[Callable] = None,
    ) -> List[Dict]:
        """
        获取指定一级评论下的所有二级评论, 该方法会一直查找一级评论下的所有二级评论信息
        Args:
            comments: 评论列表
            photo_id: 视频id
            crawl_interval: 爬取一次评论的延迟单位（秒）
            callback: 一次评论爬取结束后
        Returns:

        """
        if not config.ENABLE_GET_SUB_COMMENTS:
            utils.logger.info(
                f"[KuaiShouClient.get_comments_all_sub_comments] Crawling sub_comment mode is not enabled"
            )
            return []

        result = []
        for comment in comments:
            sub_comments = comment.get("subComments")
            if sub_comments and callback:
                await callback(photo_id, sub_comments)

            sub_comment_pcursor = comment.get("subCommentsPcursor")
            if sub_comment_pcursor == "no_more":
                continue

            root_comment_id = comment.get("commentId")
            sub_comment_pcursor = ""

            while sub_comment_pcursor != "no_more":
                comments_res = await self.get_video_sub_comments(
                    photo_id, root_comment_id, sub_comment_pcursor
                )
                vision_sub_comment_list = comments_res.get("visionSubCommentList",{})
                sub_comment_pcursor = vision_sub_comment_list.get("pcursor", "no_more")

                comments = vision_sub_comment_list.get("subComments", {})
                if callback:
                    await callback(photo_id, comments)
                await asyncio.sleep(crawl_interval)
                result.extend(comments)
        return result

    async def get_creator_info(self, user_id: str) -> Dict:
        """
        eg: https://www.kuaishou.com/profile/3x4jtnbfter525a
        快手用户主页
        """

        visionProfile = await self.get_creator_profile(user_id)
        return visionProfile.get("userProfile")

    async def get_all_videos_by_creator(
        self,
        user_id: str,
        crawl_interval: float = 1.0,
        callback: Optional[Callable] = None,
    ) -> List[Dict]:
        """
        获取指定用户下的所有发过的帖子，该方法会一直查找一个用户下的所有帖子信息
        Args:
            user_id: 用户ID
            crawl_interval: 爬取一次的延迟单位（秒）
            callback: 一次分页爬取结束后的更新回调函数
        Returns:

        """
        result = []
        pcursor = ""

        while pcursor != "no_more":
            videos_res = await self.get_video_by_creater(user_id, pcursor)
            if not videos_res:
                utils.logger.error(
                    f"[KuaiShouClient.get_all_videos_by_creator] The current creator may have been banned by ks, so they cannot access the data."
                )
                break

            vision_profile_photo_list = videos_res.get("visionProfilePhotoList", {})
            pcursor = vision_profile_photo_list.get("pcursor", "")

            videos = vision_profile_photo_list.get("feeds", [])
            utils.logger.info(
                f"[KuaiShouClient.get_all_videos_by_creator] got user_id:{user_id} videos len : {len(videos)}"
            )

            if callback:
                await callback(videos)
            await asyncio.sleep(crawl_interval)
            result.extend(videos)
        return result