#!/usr/bin/env python
import base64

import binascii

from ..common import *
import random
import string
import ctypes
from json import loads
from urllib import request

__all__ = ['ixigua_download', 'ixigua_download_playlist_by_url']

headers = {
    "user-agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 "
                  "Safari/537.36",
}


def int_overflow(val):
    maxint = 2147483647
    if not -maxint - 1 <= val <= maxint:
        val = (val + (maxint + 1)) % (2 * (maxint + 1)) - maxint - 1
    return val


def unsigned_right_shitf(n, i):
    if n < 0:
        n = ctypes.c_uint32(n).value
    if i < 0:
        return -int_overflow(n << abs(i))
    return int_overflow(n >> i)


def get_video_url_from_video_id(video_id):
    """Splicing URLs according to video ID to get video details"""
    # from js
    data = [""] * 256
    for index, _ in enumerate(data):
        t = index
        for i in range(8):
            t = -306674912 ^ unsigned_right_shitf(t, 1) if 1 & t else unsigned_right_shitf(t, 1)
        data[index] = t

    def tmp():
        rand_num = random.random()
        path = "/video/urls/v/1/toutiao/mp4/{video_id}?r={random_num}".format(video_id=video_id,
                                                                              random_num=str(rand_num)[2:])
        e = o = r = -1
        i, a = 0, len(path)
        while i < a:
            e = ord(path[i])
            i += 1
            if e < 128:
                r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ e)]
            else:
                if e < 2048:
                    r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (192 | e >> 6 & 31))]
                    r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | 63 & e))]
                else:
                    if 55296 <= e < 57344:
                        e = (1023 & e) + 64
                        i += 1
                        o = 1023 & t.url(i)
                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (240 | e >> 8 & 7))]
                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | e >> 2 & 63))]
                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | o >> 6 & 15 | (3 & e) << 4))]
                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | 63 & o))]
                    else:
                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (224 | e >> 12 & 15))]
                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | e >> 6 & 63))]
                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | 63 & e))]

        return "https://ib.365yg.com{path}&s={param}".format(path=path, param=unsigned_right_shitf(r ^ -1, 0))

    while 1:
        url = tmp()
        if url.split("=")[-1][0] != "-":  # 参数s不能为负数
            return url


def ixigua_download(url, output_dir='.', merge=True, info_only=False, **kwargs):
    # example url: https://www.ixigua.com/i6631065141750268420/#mid=63024814422
    resp = urlopen_with_retry(request.Request(url))
    html = resp.read().decode('utf-8')

    _cookies = []
    for c in resp.getheader('Set-Cookie').split("httponly,"):
        _cookies.append(c.strip().split(' ')[0])
    headers['cookie'] = ' '.join(_cookies)

    conf = loads(match1(html, r"window\.config = (.+);"))
    if not conf:
        log.e("Get window.config from url failed, url: {}".format(url))
        return
    verify_url = conf['prefix'] + conf['url'] + '?key=' + conf['key'] + '&psm=' + conf['psm'] \
        + '&_signature=' + ''.join(random.sample(string.ascii_letters + string.digits, 31))
    try:
        ok = get_content(verify_url)
    except Exception as e:
        ok = e.msg
    if ok != 'OK':
        log.e("Verify failed, verify_url: {}, result: {}".format(verify_url, ok))
        return
    html = get_content(url, headers=headers)

    video_id = match1(html, r"\"vid\":\"([^\"]+)")
    title = match1(html, r"\"player__videoTitle\">.*?<h1.*?>(.*)<\/h1><\/div>")
    if not video_id:
        log.e("video_id not found, url:{}".format(url))
        return
    video_info_url = get_video_url_from_video_id(video_id)
    video_info = loads(get_content(video_info_url))
    if video_info.get("code", 1) != 0:
        log.e("Get video info from {} error: server return code {}".format(video_info_url, video_info.get("code", 1)))
        return
    if not video_info.get("data", None):
        log.e("Get video info from {} error: The server returns JSON value"
              " without data or data is empty".format(video_info_url))
        return
    if not video_info["data"].get("video_list", None):
        log.e("Get video info from {} error: The server returns JSON value"
              " without data.video_list or data.video_list is empty".format(video_info_url))
        return
    if not video_info["data"]["video_list"].get("video_1", None):
        log.e("Get video info from {} error: The server returns JSON value"
              " without data.video_list.video_1 or data.video_list.video_1 is empty".format(video_info_url))
        return
    bestQualityVideo = list(video_info["data"]["video_list"].keys())[-1] #There is not only video_1, there might be video_2
    size = int(video_info["data"]["video_list"][bestQualityVideo]["size"])
    print_info(site_info=site_info, title=title, type="mp4", size=size)  # 该网站只有mp4类型文件
    if not info_only:
        video_url = base64.b64decode(video_info["data"]["video_list"][bestQualityVideo]["main_url"].encode("utf-8"))
        download_urls([video_url.decode("utf-8")], title, "mp4", size, output_dir, merge=merge, headers=headers, **kwargs)


def ixigua_download_playlist_by_url(url, output_dir='.', merge=True, info_only=False, **kwargs):
    assert "user" in url, "Only support users to publish video list,Please provide a similar url:" \
                          "https://www.ixigua.com/c/user/6907091136/"

    user_id = url.split("/")[-2] if url[-1] == "/" else url.split("/")[-1]
    params = {"max_behot_time": "0", "max_repin_time": "0", "count": "20", "page_type": "0", "user_id": user_id}
    while 1:
        url = "https://www.ixigua.com/c/user/article/?" + "&".join(["{}={}".format(k, v) for k, v in params.items()])
        video_list = loads(get_content(url, headers=headers))
        params["max_behot_time"] = video_list["next"]["max_behot_time"]
        for video in video_list["data"]:
            ixigua_download("https://www.ixigua.com/i{}/".format(video["item_id"]), output_dir, merge, info_only,
                            **kwargs)
        if video_list["next"]["max_behot_time"] == 0:
            break


site_info = "ixigua.com"
download = ixigua_download
download_playlist = ixigua_download_playlist_by_url