# -*- coding: utf-8 -*-

from datetime import datetime, timedelta

import httpx
import retry
from dateutil.parser import parse

import config
from utils.utils import logger

ip_pool = []


# 代理池

class ProxyIp:
    ip: str
    port: int
    expire: datetime
    city: str
    isp: str

    def __init__(self, ip, port, expire, city='未知', isp='未知'):
        self.ip = ip
        self.port = port
        self.expire = parse(expire)
        self.city = city
        self.isp = isp

    def __str__(self):
        return F"({self.city}-{self.isp}){self.ip}:{self.port}  过期时间:{self.expire}"

    def is_expire(self):
        now = datetime.now()
        expire = self.expire - timedelta(seconds=20)
        return expire < now

    def to_httpx_proxies(self):
        return {"http://": F"http://{self.ip}:{self.port}"}


class ProxyError(Exception):
    def __init__(self, message, code=-1000):
        self.code = code
        self.message = message

    def __str__(self):
        return F"错误码: {self.code} 错误消息: {self.message}"


@retry.retry(exceptions=ProxyError, tries=3, delay=2, backoff=2)
def add_ip(count=1) -> ProxyIp:
    """
    向ip池中添加一个代理ip对象
    :param count: 添加的数量 默认为1
    :return:
    """
    url = "http://api.tianqiip.com/getip"
    params = {
        "secret": config.PROXY_SECRET,  # 密钥
        "sign": config.PROXY_SIGN,  # 签名
        "num": count,  # 数量
        "type": "json",  # 返回类型
        "port": 1,  # 协议
        "time": 3,  # 时长三分钟
        "ts": 1,  # 显示过期时间
        "mr": 1,  # 去重
        "cs": 1,  # 显示位置
        "ys": 1  # 显示运营商
    }
    ips = []
    result: dict = httpx.get(url, params=params, proxies={}).json()
    if not result['code'] == 1000:
        logger.error("[IP池]API获取代理IP失败")
        raise ProxyError(result['code'], result['msg'])
    for data in result["data"]:
        ip = ProxyIp(data['ip'], data['port'], data['expire'], city=data['city'], isp=data['isp'])
        ip_pool.append(ip)
        ips.append(ip)
        logger.info(F"[IP池]新增代理IP {str(ip)}")
    return ips[0]


def del_ip(index):
    if index > len(ip_pool) - 1:
        return
    logger.error(f"[IP池]代理IP被删除: {ip_pool[index]}")
    del ip_pool[index]


def get_ip(cache=True) -> ProxyIp:
    """
    获取一个代理ip对象
    :param cache: 使用缓存
    :return:
    """
    if not cache:
        # 不使用缓存时 请求一个新的ip并放入池中 然后获取该ip
        return add_ip()
    # 从缓存中获取一个有效的ip
    if not ip_pool:
        return add_ip()
    cur_ip = None
    for index, ip in enumerate(ip_pool):
        if not ip.is_expire():
            # 没过期 返回
            cur_ip = ip
            break
    if not cur_ip:
        return add_ip()
    logger.info(f"[IP池]从IP池中获取到代理IP: {cur_ip}")
    return cur_ip