import { isAuthRequired, isDashboardSessionAuthenticated } from "@/shared/utils/apiAuth";
import { createErrorResponse } from "@/lib/api/errorResponse";
import { extractApiKey, isValidApiKey } from "@/sse/services/auth";
import { getApiKeyMetadata } from "@/lib/db/apiKeys";

export const MANAGE_SCOPE = "manage";

export function hasManageScope(scopes: string[] = []): boolean {
  return scopes.includes("manage") || scopes.includes("admin");
}

export async function requireManagementAuth(request: Request): Promise<Response | null> {
  if (!(await isAuthRequired(request))) {
    return null;
  }

  if (await isDashboardSessionAuthenticated(request)) {
    return null;
  }

  const apiKey = extractApiKey(request);
  if (apiKey) {
    let meta: Awaited<ReturnType<typeof getApiKeyMetadata>>;
    try {
      if (!(await isValidApiKey(apiKey))) {
        return createErrorResponse({
          status: 401,
          message: "Invalid API key",
          type: "invalid_request",
        });
      }
      meta = await getApiKeyMetadata(apiKey);
    } catch {
      return createErrorResponse({
        status: 503,
        message: "Service temporarily unavailable",
        type: "server_error",
      });
    }

    if (meta && hasManageScope(meta.scopes)) return null;

    return createErrorResponse({
      status: 403,
      message: "API key lacks 'manage' scope. Enable it in the API Manager dashboard.",
      type: "invalid_request",
    });
  }

  return createErrorResponse({
    status: 401,
    message: "Authentication required",
    type: "invalid_request",
  });
}