const GET_PROXY_PREFIXES = Object.freeze(["/v1/"]);
const GET_PROXY_ROUTES = new Set(["/v1", "/auth/session"]);
const POST_PROXY_ROUTES = new Set([
  "/auth/login",
  "/auth/logout",
  "/json-rpc",
  "/v1/agent/chat",
  "/v1/agent/chat/cancel",
  "/v1/m3/io",
  "/v1/skills/uploads"
]);
const PUBLIC_PROXY_ROUTES = new Set([
  "GET /auth/session",
  "POST /auth/login",
  "POST /auth/logout",
  "POST /v1/agent/chat",
  "POST /v1/agent/chat/cancel"
]);

export function cloudWebProxyRoutePolicy(method, pathname) {
  const normalizedMethod = normalizeMethod(method);
  const normalizedPath = normalizePathname(pathname);
  const routeKey = `${normalizedMethod} ${normalizedPath}`;
  const proxy = isCloudApiProxyRoute(normalizedMethod, normalizedPath);
  const publicRoute = proxy && (
    PUBLIC_PROXY_ROUTES.has(routeKey) ||
    isPublicCodeAgentPollRoute(normalizedMethod, normalizedPath)
  );
  return {
    proxy,
    authRequired: proxy && !publicRoute,
    publicRoute,
    routeKey
  };
}

export function isCloudApiProxyRoute(method, pathname) {
  const normalizedMethod = normalizeMethod(method);
  const normalizedPath = normalizePathname(pathname);
  if (normalizedMethod === "GET") {
    return GET_PROXY_ROUTES.has(normalizedPath) ||
      GET_PROXY_PREFIXES.some((prefix) => normalizedPath.startsWith(prefix));
  }
  if (normalizedMethod === "POST") {
    return POST_PROXY_ROUTES.has(normalizedPath);
  }
  return false;
}

function isPublicCodeAgentPollRoute(method, pathname) {
  return method === "GET" && (
    pathname.startsWith("/v1/agent/chat/result/") ||
    pathname.startsWith("/v1/agent/chat/trace/")
  );
}

function normalizeMethod(method) {
  return String(method || "GET").trim().toUpperCase() || "GET";
}

function normalizePathname(pathname) {
  const value = String(pathname || "/").trim();
  if (!value || value[0] !== "/") return "/";
  return value.replace(/\/+$/u, "") || "/";
}