// 统一启动入口：本地运行 Next CLI，Docker 保留 standalone，两者共管 WebDAV 生命周期。
import { execFile, spawn } from "node:child_process";
import { createRequire } from "node:module";
import { getWebdavConfig } from "../src/server/webdav/config.mjs";

const mode = process.argv[2] || "standalone";
if (!["dev", "start", "standalone"].includes(mode))
  throw new Error("启动模式必须为 dev、start 或 standalone");
const local = mode !== "standalone";
const load = createRequire(import.meta.url);
if (local) {
  process.env.NODE_ENV = mode === "dev" ? "development" : "production";
  // 复用当前 Next 安装中的 env loader，与 Next 的 .env* 优先级和变量展开保持一致。
  const loadNext = createRequire(load.resolve("next/package.json"));
  loadNext("@next/env").loadEnvConfig(process.cwd(), mode === "dev");
  process.env.PORT = process.env.PORT?.trim() || "3200";
  process.env.WEBDAV_PORT = process.env.WEBDAV_PORT?.trim() || "3201";
}
const config = getWebdavConfig();
if (config.enabled && config.port === Number(process.env.PORT))
  throw new Error("WebDAV 与管理页不能使用相同端口");

const children = [];
let stopping = false;
const stop = (code = 0) => {
  if (stopping) return;
  stopping = true;
  process.exitCode = code;
  for (const child of children) {
    if (child.exitCode !== null || child.signalCode !== null) continue;
    // next dev 还会创建服务进程；Windows 必须结束整个子进程树，避免残留监听端口。
    if (process.platform === "win32")
      execFile("taskkill", ["/PID", String(child.pid), "/T", "/F"], () => {});
    else child.kill("SIGTERM");
  }
  setTimeout(() => {
    for (const child of children) child.kill("SIGKILL");
  }, 6000).unref();
};
const start = (file, args = [], env = process.env) => {
  const child = spawn(process.execPath, [file, ...args], {
    stdio: "inherit",
    env
  });
  children.push(child);
  child.on("error", () => stop(1));
  child.on("exit", (code, signal) => {
    if (!stopping) stop(code || (signal ? 1 : 0));
  });
};

if (local)
  start(load.resolve("next/dist/bin/next"), [mode, "-p", process.env.PORT]);
else start("server.js");
if (config.enabled) {
  const env = { ...process.env };
  // 本地无密钥的演示模式沿用网页的 mock 密钥，不改变 Next 进程的演示提示。
  if (local && !env.TORBOX_API_KEY?.trim() && !env.ACCESS_TOKEN?.trim())
    env.ACCESS_TOKEN = "mock";
  start("scripts/webdav.mjs", [], env);
}
process.once("SIGINT", () => stop());
process.once("SIGTERM", () => stop());