"""proxynova.com 表格内 JS 混淆 IP + 明文端口。"""
import re
from typing import List, Optional

from bs4 import BeautifulSoup

from app.core.plugin_system import ProxyRaw
from app.plugins.base import BaseHTTPPlugin
from app.core.log import logger


class FpwProxynovaPlugin(BaseHTTPPlugin):
    name = "fpw_proxynova"
    display_name = "ProxyNova"
    description = "proxynova.com 代理列表（解析 document.write 混淆 IP）"

    def __init__(self):
        super().__init__()
        self.urls = ["https://www.proxynova.com/proxy-server-list/"]

    @staticmethod
    def _decode_proxynova_ip(script_inner: str) -> Optional[str]:
        """解析 document.write(\".081.301\".split(\"\").reverse()...concat(\"118.174\"...))"""
        m1 = re.search(r'document\.write\("([^"]+)"\.split', script_inner)
        m2 = re.search(r'\.concat\("([^"]+)"', script_inner)
        if not m1 or not m2:
            return None
        a, b = m1.group(1), m2.group(1)
        part1 = "".join(reversed(a))
        return part1 + b

    def _parse_rows(self, html: str) -> List[ProxyRaw]:
        soup = BeautifulSoup(html, "lxml")
        tbody = soup.find("tbody")
        if not tbody:
            return []
        out: List[ProxyRaw] = []
        for tr in tbody.find_all("tr"):
            tds = tr.find_all("td")
            if len(tds) < 2:
                continue
            script = tds[0].find("script")
            if not script or not script.string:
                continue
            ip = self._decode_proxynova_ip(script.string)
            port_txt = tds[1].get_text(strip=True)
            if not ip or not port_txt.isdigit():
                continue
            port = int(port_txt)
            if not (1 <= port <= 65535):
                continue
            row_text = tr.get_text(" ", strip=True).upper()
            if "SOCKS5" in row_text:
                proto = "socks5"
            elif "SOCKS4" in row_text:
                proto = "socks4"
            elif "HTTPS" in row_text:
                proto = "https"
            else:
                proto = "http"
            try:
                out.append(ProxyRaw(ip, port, proto))
            except ValueError:
                continue
        return out

    def _parse_plain_ip_port_rows(self, html: str) -> List[ProxyRaw]:
        soup = BeautifulSoup(html, "lxml")
        out: List[ProxyRaw] = []
        for tr in soup.find_all("tr"):
            tds = tr.find_all("td")
            if len(tds) < 2:
                continue
            ip = tds[0].get_text(strip=True)
            port_txt = tds[1].get_text(strip=True)
            if not re.match(r"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$", ip):
                continue
            if not port_txt.isdigit() or not (1 <= int(port_txt) <= 65535):
                continue
            row_text = tr.get_text(" ", strip=True).upper()
            if "SOCKS5" in row_text:
                proto = "socks5"
            elif "SOCKS4" in row_text:
                proto = "socks4"
            elif "HTTPS" in row_text:
                proto = "https"
            else:
                proto = "http"
            try:
                out.append(ProxyRaw(ip, int(port_txt), proto))
            except ValueError:
                continue
        return out

    async def crawl(self) -> List[ProxyRaw]:
        html = await self.fetch(self.urls[0], timeout=25, retries=2)
        if not html:
            return []
        results = self._parse_rows(html)
        if not results:
            results = self._parse_plain_ip_port_rows(html)
        if results:
            logger.info(f"{self.display_name} 解析 {len(results)} 条")
        return results