import { spawnSync, type SpawnSyncOptionsWithStringEncoding } from "node:child_process";
import { fileURLToPath } from "node:url";
import { dirname, resolve } from "node:path";

export interface AutostartInstallOpts {
  port?: number;
  bind?: string;
  dbPath?: string;
}

export interface AutostartManager {
  readonly mode: "default" | "service";
  install(opts: AutostartInstallOpts): Promise<void>;
  uninstall(purge: boolean): Promise<void>;
  start(): Promise<void>;
  stop(): Promise<void>;
  status(): Promise<"Running" | "Stopped" | "NotInstalled">;
}

export interface RunResult {
  status: number;
  stdout: string;
  stderr: string;
}

export function run(file: string, args: string[]): RunResult {
  const opts: SpawnSyncOptionsWithStringEncoding = {
    encoding: "utf8",
    stdio: ["ignore", "pipe", "pipe"],
    shell: false,
  };
  const r = spawnSync(file, args, opts);
  return {
    status: r.status ?? -1,
    stdout: typeof r.stdout === "string" ? r.stdout : "",
    stderr: typeof r.stderr === "string" ? r.stderr : "",
  };
}

export function cliEntry(): { node: string; script: string } {
  const here = dirname(fileURLToPath(import.meta.url));
  return {
    node: process.execPath,
    script: resolve(here, "..", "cli.js"),
  };
}

export async function autostartManager(mode: "default" | "service" = "default"): Promise<AutostartManager> {
  if (process.platform === "win32") {
    const mod = await import("./windows.js");
    return mod.windowsManager(mode);
  }
  if (process.platform === "darwin") {
    const mod = await import("./darwin.js");
    return mod.darwinManager();
  }
  const mod = await import("./linux.js");
  return mod.linuxManager();
}