// 开发期测试用的路径别名解析器：把 @/ 映射到 src/，并为 .ts/.tsx 探测扩展名
import { pathToFileURL } from "node:url";
import { resolve as pathResolve } from "node:path";

const SRC = pathResolve(process.cwd(), "src");

const EXTS = [".ts", ".tsx", ".js", ".mjs", "/index.ts", "/index.tsx"];

export async function resolve(specifier, context, nextResolve) {
  if (specifier.startsWith("@/")) {
    const base = pathResolve(SRC, specifier.slice(2));
    for (const ext of EXTS) {
      try {
        return await nextResolve(pathToFileURL(base + ext).href, context);
      } catch {
        // 尝试下一个扩展名
      }
    }
  }
  return nextResolve(specifier, context);
}