import { assistantHomarrProviderTokenHeader } from "@homarr/definitions";

/**
 * The AI SDK resolves provider options by the provider name registered on the
 * language model. The @ai-sdk/openai-compatible provider converts the raw
 * provider name (for example `homarr-openrouter`) to camelCase
 * (`homarrOpenrouter`) and warns when the raw key is still used. This helper
 * mirrors that conversion so providerOptions reach the provider without a
 * deprecation warning.
 */
export const toProviderOptionsKey = (name: string) =>
  name
    .split("-")
    .filter(Boolean)
    .map((segment, index) => {
      if (index === 0) return segment;
      return segment.charAt(0).toUpperCase() + segment.slice(1);
    })
    .join("");

export const getHomarrProviderBaseUrl = (workshopApiUrl: string) => `${workshopApiUrl.replace(/\/+$/u, "")}/api/ai/v1`;

export const resolveHomarrProviderToken = ({
  provider,
  configuredBaseUrl,
  workshopApiUrl,
  headers,
}: {
  provider: string;
  configuredBaseUrl: string;
  workshopApiUrl: string;
  headers: Headers;
}) => {
  if (provider !== "homarr") return undefined;
  if (configuredBaseUrl.replace(/\/+$/u, "") !== getHomarrProviderBaseUrl(workshopApiUrl)) {
    throw new Error("The Homarr provider endpoint does not match the configured Workshop server.");
  }
  const token = headers.get(assistantHomarrProviderTokenHeader)?.trim();
  return token && token.length <= 4096 ? token : null;
};