import { invoke } from "@tauri-apps/api/core";

/** API 路径前缀（实际 HTTP 由 Rust `api_request` 发出） */
const API_BASE = import.meta.env.VITE_API_BASE_URL || "/api/v1";

function isTauri() {
  return typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
}

/**
 * @param {string} path - 相对 `/api/v1` 的路径，如 `/auth/login`
 * @param {RequestInit} options
 * @returns {Promise<{ ok: boolean, message: string, data?: unknown }>}
 */
export async function apiRequest(path, options = {}) {
  if (!isTauri()) {
    return {
      ok: false,
      message: "API 请求需在 Tauri 桌面端运行（由 Rust 代理并加解密）",
    };
  }

  const method = (options.method || "GET").toUpperCase();
  let body;
  if (options.body != null && options.body !== "") {
    body = typeof options.body === "string" ? options.body : JSON.stringify(options.body);
  }

  const headers = {};
  if (options.headers) {
    const h = options.headers;
    if (h instanceof Headers) {
      h.forEach((value, key) => {
        headers[key] = value;
      });
    } else {
      Object.assign(headers, h);
    }
  }

  const relPath = path.startsWith("/") ? path : `/${path}`;

  try {
    const result = await invoke("api_request", {
      path: relPath,
      method,
      body: body ?? null,
      headers: Object.keys(headers).length ? headers : null,
    });
    if (result && typeof result === "object" && "ok" in result) {
      return result;
    }
    return { ok: false, message: "服务器返回格式异常" };
  } catch (err) {
    return { ok: false, message: String(err) };
  }
}

export { API_BASE };