import { isNonSecretApiKeyMarker } from "openclaw/plugin-sdk/provider-auth";
import { getCachedLiveCatalogValue } from "openclaw/plugin-sdk/provider-catalog-shared";
import { discoverOpenAICompatibleLocalModels } from "openclaw/plugin-sdk/provider-setup";
import {
  LLAMA_SERVER_DISCOVERY_CACHE_TTL_MS,
  LLAMA_SERVER_DISCOVERY_TIMEOUT_MS,
} from "./defaults.js";
import { resolveLlamaServerEndpoint } from "./endpoint.js";
import { mapLlamaServerModel, type LlamaServerDiscoveredModel } from "./models.js";

export type LlamaServerDiscoveryResult =
  | {
      kind: "success";
      endpoint: ReturnType<typeof resolveLlamaServerEndpoint>;
      models: LlamaServerDiscoveredModel[];
    }
  | {
      kind: "unreachable";
      endpoint: ReturnType<typeof resolveLlamaServerEndpoint>;
      error: unknown;
    }
  | {
      kind: "http-error";
      endpoint: ReturnType<typeof resolveLlamaServerEndpoint>;
      status: number;
      path: string;
    }
  | {
      kind: "invalid-response";
      endpoint: ReturnType<typeof resolveLlamaServerEndpoint>;
      path: string;
      error: unknown;
    };

/** Discovers llama-server models without loading, waking, or unloading them. */
export async function discoverLlamaServer(params: {
  baseUrl?: string;
  apiKey?: string;
  headers?: Record<string, string>;
  timeoutMs?: number;
  cacheTtlMs?: number;
  signal?: AbortSignal;
}): Promise<LlamaServerDiscoveryResult> {
  const endpoint = resolveLlamaServerEndpoint(params.baseUrl);
  const apiKey = params.apiKey?.trim();
  const hasCredentialScope =
    Boolean(apiKey && !isNonSecretApiKeyMarker(apiKey)) ||
    Boolean(params.headers && Object.keys(params.headers).length > 0);
  const cacheTtlMs = hasCredentialScope
    ? 0
    : Math.max(0, params.cacheTtlMs ?? LLAMA_SERVER_DISCOVERY_CACHE_TTL_MS);

  return await getCachedLiveCatalogValue({
    keyParts: ["llama-cpp", "external", endpoint.origin],
    ttlMs: cacheTtlMs,
    shouldCache: (result) => result.kind === "success",
    load: async () => {
      const result = await discoverOpenAICompatibleLocalModels({
        baseUrl: endpoint.inferenceBaseUrl,
        serverBaseUrl: endpoint.origin,
        apiKey: params.apiKey,
        headers: params.headers,
        label: "llama-server",
        healthPath: "/health",
        modelsPathOrder: "server-first",
        routerModelProps: true,
        timeoutMs: params.timeoutMs ?? LLAMA_SERVER_DISCOVERY_TIMEOUT_MS,
        signal: params.signal,
        rawResult: true,
      });
      if (result.kind !== "success") {
        return { ...result, endpoint };
      }
      return {
        kind: "success" as const,
        endpoint,
        models: result.rows.flatMap(({ model, props }) => {
          const mapped = mapLlamaServerModel(model, props);
          return mapped ? [mapped] : [];
        }),
      };
    },
  });
}