import log4js from "logger";
import {
  getRequestURL,
  send,
  setResponseHeader,
  setResponseHeaders,
  setResponseStatus,
} from "h3";
import { defineNitroErrorHandler } from "nitropack/runtime";
import { isJsonRequest, normalizeError } from "#server/utils/nitro-error-json";

const logger = log4js.getLogger("ERROR");
const isDev = process.env.NODE_ENV === "development";

/** 优先于 Nitro 内置 JSON 错误体：不向客户端返回 stack（开发/生产一致） */
export default defineNitroErrorHandler(function safeJsonErrorHandler(error, event) {
  if (!isJsonRequest(event)) {
    return;
  }

  const { statusCode, statusMessage, message } = normalizeError(error, isDev);

  if (error.unhandled || error.fatal || statusCode >= 500) {
    logger.error(
      "[request]",
      event.method,
      event.path,
      error.message,
      error instanceof Error ? (error.stack ?? "") : "",
    );
  }

  const url = getRequestURL(event, { xForwardedHost: true, xForwardedProto: true });

  setResponseHeaders(event, {
    "Content-Security-Policy": "script-src 'none'; frame-ancestors 'none';",
    "X-Content-Type-Options": "nosniff",
    "X-Frame-Options": "DENY",
    "Referrer-Policy": "no-referrer",
  });
  if (statusCode === 404) {
    setResponseHeader(event, "Cache-Control", "no-cache");
  }
  setResponseStatus(event, statusCode, statusMessage);
  setResponseHeader(event, "Content-Type", "application/json");

  const body: Record<string, unknown> = {
    error: true,
    url: url.href,
    statusCode,
    statusMessage,
    message,
  };
  if (error.data !== undefined) {
    body.data = error.data;
  }

  return send(event, JSON.stringify(body));
});