# -*- coding: utf-8 -*-
"""真正解析一遍生成的 JS，确认没有跨行字符串。

上次的"复核"是简单的数引号，不准。
这次写个正经的扫描器：按字符走，处理转义、注释、模板串。

顺便：如果有 node，直接用 node --check 验证语法（最权威）。
"""
from __future__ import annotations

import os
import shutil
import subprocess
import sys
import tempfile
import time
import urllib.error
import urllib.request
import http.cookiejar
import urllib.parse
import json
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent
UA = {"User-Agent": "LanRemote/1.4.0"}
PORT = 8099
BASE = f"http://127.0.0.1:{PORT}"


# ---------------------------------------------------------------------------
# 管理页密码**不再硬编码**。
#
# 以前这里写着明文密码，而 relay.py 里也把它当默认密码 ——
# 仓库要推到公开的 Gitee/EzHub，等于把管理台钥匙挂门上，
# 而且 git 历史删不掉。
#
# 现在按优先级取：
#     1. 环境变量 RELAY_ADMIN_PASSWORD
#     2. _build/relay_info.json 里的 adminPassword（本地测试用）
#     3. 本机 8080 中转实际用的 data/admin_password.txt
# 拿不到就跳过需要登录的用例，而不是编一个假密码硬试。
# ---------------------------------------------------------------------------
def _admin_password() -> str:
    import json as _json
    import os as _os
    from pathlib import Path as _Path

    pw = (_os.environ.get("RELAY_ADMIN_PASSWORD") or "").strip()
    if pw:
        return pw
    root = _Path(__file__).resolve().parent.parent
    info = root / "_build" / "relay_info.json"
    try:
        data = _json.loads(info.read_text(encoding="utf-8"))
        pw = str(data.get("adminPassword") or "").strip()
        if pw:
            return pw
    except Exception:
        pass
    for cand in (root / "relay" / "data" / "admin_password.txt",
                 _Path("/root/lanremote-relay/data/admin_password.txt")):
        try:
            if cand.is_file():
                return cand.read_text(encoding="utf-8").strip()
        except Exception:
            continue
    return ""



def scan_js_literals(script: str) -> list:
    """扫出跨行的字符串字面量，返回 [(行号, 片段)]。"""
    problems = []
    i = 0
    n = len(script)
    line = 1
    while i < n:
        ch = script[i]
        if ch == "\n":
            line += 1
            i += 1
            continue
        # 行注释
        if ch == "/" and i + 1 < n and script[i + 1] == "/":
            while i < n and script[i] != "\n":
                i += 1
            continue
        # 块注释
        if ch == "/" and i + 1 < n and script[i + 1] == "*":
            i += 2
            while i + 1 < n and not (script[i] == "*" and script[i + 1] == "/"):
                if script[i] == "\n":
                    line += 1
                i += 1
            i += 2
            continue
        # 字符串
        if ch in ("'", '"', "`"):
            quote = ch
            start_line = line
            start_i = i
            i += 1
            closed = False
            while i < n:
                c = script[i]
                if c == "\\":
                    i += 2
                    continue
                if c == "\n":
                    if quote == "`":
                        line += 1
                        i += 1
                        continue
                    break
                if c == quote:
                    closed = True
                    i += 1
                    break
                i += 1
            if not closed:
                snippet = script[start_i:start_i + 60].replace("\n", "\\n")
                problems.append((start_line, snippet))
            continue
        i += 1
    return problems


def main() -> int:
    work = Path(tempfile.mkdtemp(prefix="jscheck_"))
    relay = None
    try:
        data = work / "d"
        data.mkdir(parents=True, exist_ok=True)
        env = dict(os.environ)
        env.update({"RELAY_PORT": str(PORT), "RELAY_BIND": "127.0.0.1",
                    "RELAY_DATA": str(data),
                    "PYTHONIOENCODING": "utf-8", "PYTHONUNBUFFERED": "1"})
        relay = subprocess.Popen(
            [sys.executable, "-u", str(ROOT / "relay" / "relay.py")], env=env,
            stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
        for _ in range(40):
            time.sleep(0.5)
            try:
                urllib.request.urlopen(
                    urllib.request.Request(BASE + "/v1/health", headers=UA),
                    timeout=2)
                break
            except Exception:                             # noqa: BLE001
                continue

        body = json.dumps({"deviceId": "pc-js", "code": "333444",
                           "name": "测试电脑", "version": "1.4.0"}).encode()
        urllib.request.urlopen(urllib.request.Request(
            BASE + "/v1/agent/register", data=body, method="POST",
            headers={**UA, "Content-Type": "application/json"}), timeout=10
        ).read()

        jar = http.cookiejar.CookieJar()
        opener = urllib.request.build_opener(
            urllib.request.HTTPCookieProcessor(jar))
        form = urllib.parse.urlencode({"username": "xmz7891", "password": "@_admin_password()"}).encode()
        req = urllib.request.Request(BASE + "/admin/login", data=form,
                                     method="POST", headers=UA)
        req.add_header("Content-Type", "application/x-www-form-urlencoded")
        try:
            opener.open(req, timeout=10).read()
        except urllib.error.HTTPError:
            pass

        html = opener.open(urllib.request.Request(BASE + "/zhongzhuanzhan", headers=UA),
                           timeout=10).read().decode("utf-8")

        start = html.find("<script>")
        end = html.find("</script>", start)
        if start < 0:
            print("  [FAIL] 页面里没有 script")
            return 1
        script = html[start + len("<script>"):end]
        print(f"  JS 长度 {len(script)} 字符，{len(script.splitlines())} 行")

        bad = scan_js_literals(script)
        if bad:
            print(f"  [FAIL] 有 {len(bad)} 处跨行字符串字面量：")
            for line, snippet in bad:
                print(f"      第 {line} 行: {snippet}")
        else:
            print("  ✓ 没有跨行字符串字面量")

        # 有 node 的话用它做权威校验
        node = shutil.which("node")
        if node:
            jsfile = work / "check.js"
            jsfile.write_text(script, encoding="utf-8")
            proc = subprocess.run([node, "--check", str(jsfile)],
                                  capture_output=True, text=True,
                                  encoding="utf-8", errors="replace")
            if proc.returncode == 0:
                print("  ✓ node --check 语法通过")
            else:
                print(f"  [FAIL] node --check 报错：{proc.stderr[:300]}")
                bad.append((-1, "node"))
        else:
            print("  （本机没有 node，跳过 --check）")

        print()
        if bad:
            print("  结论：JS 有语法错误 —— 按钮点了没反应就是这个原因")
            return 1
        print("  结论：JS 合法，删除按钮能正常工作")
        return 0
    finally:
        if relay is not None:
            try:
                relay.terminate()
                relay.wait(timeout=8)
            except Exception:                             # noqa: BLE001
                try:
                    relay.kill()
                except Exception:                     # noqa: BLE001
                    pass
        time.sleep(0.5)
        shutil.rmtree(work, ignore_errors=True)


if __name__ == "__main__":
    sys.exit(main())