import { defineConfig, type Plugin } from "vite";
import react from "@vitejs/plugin-react";
import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
import path from "node:path";

const host = process.env.TAURI_DEV_HOST;

function buildId() {
  // YYYYMMDD.HHmmss: 每次构建生成新的 BUILD_ID, 用于 OTA/web 升级比对
  // 统一按 UTC+8 (Asia/Shanghai) 取时, 避免 CI (UTC) 与本地时区漂移导致误判升级
  const pad = (n: number) => String(n).padStart(2, "0");
  const cn = new Date(Date.now() + 8 * 3600 * 1000);
  return (
    [cn.getUTCFullYear(), pad(cn.getUTCMonth() + 1), pad(cn.getUTCDate())].join("") +
    "." +
    [pad(cn.getUTCHours()), pad(cn.getUTCMinutes()), pad(cn.getUTCSeconds())].join("")
  );
}

export default defineConfig(async () => {
  const pkg = JSON.parse(readFileSync(new URL("./package.json", import.meta.url), "utf8"));

  const writeBuildId: Plugin = {
    name: "storage:write-build-id",
    closeBundle() {
      const dir = path.resolve(process.cwd(), "dist");
      mkdirSync(dir, { recursive: true });
      writeFileSync(path.join(dir, ".build-id"), buildId(), "utf8");
    },
  };

  return {
    plugins: [react(), writeBuildId],
    clearScreen: false,
    server: {
      port: 1420,
      strictPort: true,
      host: host || false,
      hmr: host ? { protocol: "ws", host, port: 1421 } : undefined,
      watch: {
        ignored: ["**/src-tauri/**"],
      },
    },
    define: {
      __BUILD_ID__: JSON.stringify(buildId()),
      __APP_VERSION__: JSON.stringify(pkg.version || "0.0.0"),
    },
  };
});