# -*- coding: utf-8 -*-
"""区分「代理导致的失败」和「真失败」。

用户开了代理之后，Windows 这边的测试客户端会受影响：
    WinError 10061 由于目标计算机积极拒绝，无法连接
这是本机代理拒了连接，不是隧道的问题。

这个脚本：
    1. 先看系统代理设置
    2. 绕过代理（proxy=None）直连隧道
    3. 对比走代理 / 不走代理的结果
"""
from __future__ import annotations

import os
import socket
import ssl
import sys
import urllib.error
import urllib.request

URL = "https://relay.xxmxxs.top/v1/health"
UA = {"User-Agent": "LanRemote/1.4.0"}


def show_proxy_settings() -> None:
    print("  系统代理相关环境变量：")
    found = False
    for name in ("HTTP_PROXY", "HTTPS_PROXY", "ALL_PROXY",
                 "http_proxy", "https_proxy", "all_proxy", "NO_PROXY"):
        value = os.environ.get(name)
        if value:
            found = True
            print(f"    {name} = {value}")
    if not found:
        print("    （没有代理环境变量）")

    # Windows 的 IE/系统代理设置（注册表）
    try:
        import winreg
        key = winreg.OpenKey(
            winreg.HKEY_CURRENT_USER,
            r"Software\Microsoft\Windows\CurrentVersion\Internet Settings")
        enable, _ = winreg.QueryValueEx(key, "ProxyEnable")
        try:
            server, _ = winreg.QueryValueEx(key, "ProxyServer")
        except FileNotFoundError:
            server = "（没设）"
        print(f"    Windows 系统代理: {'开' if enable else '关'}   {server}")
    except Exception:                                     # noqa: BLE001
        print("    （读不到 Windows 代理设置）")


def probe(label: str, opener) -> tuple:
    try:
        with opener() as resp:
            return resp.status, resp.read(60).decode("utf-8", "replace")
    except urllib.error.HTTPError as exc:
        return exc.code, exc.read(60).decode("utf-8", "replace")
    except Exception as exc:                              # noqa: BLE001
        return 0, f"{type(exc).__name__}: {exc}"


def direct_opener():
    """完全绕过代理。"""
    handler = urllib.request.ProxyHandler({})
    return urllib.request.build_opener(handler).open(
        urllib.request.Request(URL, headers=UA), timeout=20)


def default_opener():
    """用系统默认（可能有代理）。"""
    return urllib.request.urlopen(
        urllib.request.Request(URL, headers=UA), timeout=20)


def main() -> int:
    print("=" * 66)
    print("  代理影响检查")
    print("=" * 66)
    print()
    print("一、当前代理设置")
    show_proxy_settings()

    print()
    print("二、绕过代理，直连隧道（每种 5 次）")
    direct_ok = 0
    for i in range(1, 6):
        status, body = probe("direct", direct_opener)
        if status == 200:
            direct_ok += 1
        print(f"    {i}: HTTP {status}  {body[:44]}")
    print(f"    直连成功 {direct_ok}/5")

    print()
    print("三、用默认设置（可能走代理，5 次）")
    default_ok = 0
    for i in range(1, 6):
        status, body = probe("default", default_opener)
        if status == 200:
            default_ok += 1
        print(f"    {i}: HTTP {status}  {body[:44]}")
    print(f"    走默认成功 {default_ok}/5")

    print()
    print("四、TCP 层直连（不经任何 HTTP 代理）")
    try:
        ctx = ssl.create_default_context()
        with socket.create_connection(("relay.xxmxxs.top", 443),
                                      timeout=15) as raw:
            with ctx.wrap_socket(raw, server_hostname="relay.xxmxxs.top"):
                print("    ✓ TLS 握手成功（说明域名和 443 端口没问题）")
    except Exception as exc:                              # noqa: BLE001
        print(f"    ✗ {type(exc).__name__}: {exc}")

    print()
    print("=" * 66)
    print("  结论")
    print("=" * 66)
    if direct_ok > default_ok:
        print(f"  绕过代理更好（{direct_ok}/5 vs {default_ok}/5）")
        print("  -> 你的代理在干扰。测试和程序都应该绕开它访问中转。")
    elif direct_ok == default_ok == 5:
        print("  两种都通 —— 代理没影响")
    elif direct_ok == 0:
        print("  直连也不通 —— 是隧道/线路的问题，不是代理")
    else:
        print(f"  直连 {direct_ok}/5，默认 {default_ok}/5")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())