"""www.proxy-list.download 公开 API（常见为 JSON，内含 list 字段的 ip:port 文本）。"""
import json
from typing import Any, List

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


class FpwProxyListDownloadPlugin(BaseHTTPPlugin):
    name = "fpw_proxy_list_download"
    display_name = "Proxy-List.download"
    description = "proxy-list.download 官方 API（http/https/socks4/socks5）"
    crawl_timeout_seconds = 300.0

    def __init__(self):
        super().__init__()
        self.max_concurrency = 2
        self.api_pairs = [
            ("http", "https://www.proxy-list.download/api/v1/get?type=http"),
            ("https", "https://www.proxy-list.download/api/v1/get?type=https"),
            ("socks4", "https://www.proxy-list.download/api/v1/get?type=socks4"),
            ("socks5", "https://www.proxy-list.download/api/v1/get?type=socks5"),
        ]
        self._mirror_prefix = (
            "https://cdn.jsdelivr.net/gh/monosans/proxy-list@main/proxies/"
        )
        self.fallback_pairs = [
            ("http", "https://api.proxyscrape.com/v2/?request=get&protocol=http&timeout=10000&country=all&ssl=all&anonymity=all"),
            ("https", "https://api.proxyscrape.com/v2/?request=get&protocol=https&timeout=10000&country=all&ssl=all&anonymity=all"),
            ("socks4", "https://api.proxyscrape.com/v2/?request=get&protocol=socks4&timeout=10000&country=all&ssl=all&anonymity=all"),
            ("socks5", "https://api.proxyscrape.com/v2/?request=get&protocol=socks5&timeout=10000&country=all&ssl=all&anonymity=all"),
        ]

    def _items_to_proxies(self, items: List[Any], protocol: str) -> List[ProxyRaw]:
        out: List[ProxyRaw] = []
        for it in items:
            if isinstance(it, dict):
                ip = str(
                    it.get("ip")
                    or it.get("IP")
                    or it.get("host")
                    or it.get("Host")
                    or ""
                ).strip()
                port = it.get("port") or it.get("Port")
                if not ip or port is None:
                    continue
                ps = str(port).strip()
                if not ps.isdigit() or not (1 <= int(ps) <= 65535):
                    continue
                try:
                    out.append(ProxyRaw(ip, int(ps), protocol))
                except ValueError:
                    continue
            elif isinstance(it, str) and ":" in it:
                out.extend(self.parse_text_proxies(it, protocol))
        return out

    def _parse_api_body(self, text: str, protocol: str) -> List[ProxyRaw]:
        text = (text or "").strip()
        if not text:
            return []
        if text[0] in "{[":
            try:
                data = json.loads(text)
            except json.JSONDecodeError:
                return self.parse_text_proxies(text, protocol)
            if isinstance(data, list):
                return self._items_to_proxies(data, protocol)
            if isinstance(data, dict):
                for key in ("list", "LIST", "data", "Data", "proxies", "Proxies"):
                    raw = data.get(key)
                    if isinstance(raw, str) and raw.strip():
                        return self.parse_text_proxies(raw, protocol)
                    if isinstance(raw, list):
                        return self._items_to_proxies(raw, protocol)
                return []
            return []
        return self.parse_text_proxies(text, protocol)

    async def crawl(self) -> List[ProxyRaw]:
        results: List[ProxyRaw] = []
        t_req, n_try = 18.0, 1
        urls = [u for _, u in self.api_pairs]
        htmls = await self.fetch_all(urls, timeout=t_req, retries=n_try)
        for (protocol, _), text in zip(self.api_pairs, htmls):
            if not text:
                continue
            batch = self._parse_api_body(text, protocol)
            if batch:
                results.extend(batch)
                logger.info(f"{self.display_name} API {protocol}: {len(batch)} 条")
        if not results:
            logger.warning(f"{self.display_name} 主 API 无数据，尝试 jsDelivr 文本镜像")
            mirror_pairs = [
                (p, f"{self._mirror_prefix}{p}.txt")
                for p in ("http", "https", "socks4", "socks5")
            ]
            m_urls = [u for _, u in mirror_pairs]
            m_htmls = await self.fetch_all(m_urls, timeout=22.0, retries=2)
            for (protocol, _), text in zip(mirror_pairs, m_htmls):
                if not text:
                    continue
                batch = self.parse_text_proxies(text, protocol)
                if batch:
                    results.extend(batch)
                    logger.info(f"{self.display_name} 镜像 {protocol}: {len(batch)} 条")
        if not results:
            logger.warning(f"{self.display_name} 镜像无数据，尝试 ProxyScrape API")
            fb_urls = [u for _, u in self.fallback_pairs]
            fb_htmls = await self.fetch_all(fb_urls, timeout=20.0, retries=1)
            for (protocol, _), text in zip(self.fallback_pairs, fb_htmls):
                if not text:
                    continue
                batch = self._parse_api_body(text, protocol)
                if not batch:
                    batch = self.parse_text_proxies(text, protocol)
                if batch:
                    results.extend(batch)
                    logger.info(f"{self.display_name} ProxyScrape {protocol}: {len(batch)} 条")
        if results:
            logger.info(f"{self.display_name} 合计 {len(results)} 条")
        return results