#!/usr/bin/env node
/**
 * 用指定 env 文件注入 process.env 后执行 next build。
 * 已注入的变量优先于 .env.production（Next 不会覆盖已有 process.env）。
 */
import { readFileSync, existsSync } from "fs";
import { spawnSync } from "child_process";
import { resolve, dirname } from "path";
import { fileURLToPath } from "url";

const __dirname = dirname(fileURLToPath(import.meta.url));
const root = resolve(__dirname, "..");
const envFile = process.argv[2] || ".env.development";
const envPath = resolve(root, envFile);

if (!existsSync(envPath)) {
  console.error(`[build-with-env] 找不到 ${envPath}`);
  process.exit(1);
}

const env = { ...process.env, NODE_ENV: "production" };

for (const line of readFileSync(envPath, "utf8").split("\n")) {
  const trimmed = line.trim();
  if (!trimmed || trimmed.startsWith("#")) continue;
  const eq = trimmed.indexOf("=");
  if (eq === -1) continue;
  const key = trimmed.slice(0, eq).trim();
  let val = trimmed.slice(eq + 1).trim();
  if (
    (val.startsWith('"') && val.endsWith('"')) ||
    (val.startsWith("'") && val.endsWith("'"))
  ) {
    val = val.slice(1, -1);
  }
  env[key] = val;
}

console.log(
  `[build-with-env] ${envFile} → NEXT_PUBLIC_APP_ENV=${env.NEXT_PUBLIC_APP_ENV}, API_PROXY_TARGET=${env.API_PROXY_TARGET}`,
);

const nextCli = resolve(root, "node_modules/next/dist/bin/next");
if (!existsSync(nextCli)) {
  console.error("[build-with-env] 未找到 next，请先在项目目录执行 npm install");
  process.exit(1);
}

const r = spawnSync(process.execPath, [nextCli, "build"], {
  cwd: root,
  env,
  stdio: "inherit",
});

if (r.error) {
  console.error("[build-with-env] 启动 next build 失败:", r.error.message);
  process.exit(1);
}

process.exit(r.status ?? 1);