interface ClientErrorPayload {
  message: string;
  stack?: string;
  url?: string;
  line?: number;
  column?: number;
  userAgent?: string;
  tags?: string[];
}

let reportEndpoint = "/api/_error-report";

function reportError(payload: ClientErrorPayload) {
  try {
    $fetch(reportEndpoint, {
      method: "POST",
      body: payload,
    }).catch(() => {});
  } catch {
    // 静默失败，避免错误上报本身导致循环
  }
}

export default defineNuxtPlugin((nuxtApp) => {
  // Vue 运行时错误
  nuxtApp.vueApp.config.errorHandler = (err, _instance, info) => {
    const error = err instanceof Error ? err : new Error(String(err));
    reportError({
      message: error.message,
      stack: error.stack,
      url: window.location.href,
      userAgent: navigator.userAgent,
      tags: ["vue", info],
    });
  };

  // 未捕获的 Promise rejection
  window.addEventListener("unhandledrejection", (event) => {
    const reason = event.reason;
    const error = reason instanceof Error ? reason : new Error(String(reason));
    reportError({
      message: error.message,
      stack: error.stack,
      url: window.location.href,
      userAgent: navigator.userAgent,
      tags: ["unhandledrejection"],
    });
  });

  // 未捕获的同步错误
  window.addEventListener("error", (event) => {
    if (!event.message) return;
    reportError({
      message: event.message,
      url: event.filename || window.location.href,
      line: event.lineno,
      column: event.colno,
      userAgent: navigator.userAgent,
      tags: ["window"],
    });
  });
});