import type { WorkbenchApplication } from "./contracts.ts";

export function createCloudWorkbenchApplication(options: {
  baseUrl: string;
  authorization: string;
  fetchImpl?: typeof fetch;
}): WorkbenchApplication {
  if (!options.baseUrl) throw codedError("workbench_cloud_api_url_required", "WORKBENCH_CLOUD_API_URL is required");
  if (!options.authorization) throw codedError("workbench_cloud_api_auth_required", "WORKBENCH_CLOUD_API_AUTHORIZATION is required");
  const fetchImpl = options.fetchImpl ?? fetch;
  const request = async (method: string, route: string, body: Record<string, unknown> | undefined, actor: { id: string; role?: string | null }) => {
    const response = await fetchImpl(`${options.baseUrl.replace(/\/$/u, "")}${route}`, {
      method,
      headers: {
        authorization: options.authorization,
        "content-type": "application/json",
        "x-workbench-activity-dispatch": "1",
        "x-hwlab-actor-id": actor.id,
        "x-hwlab-actor-role": actor.role ?? "user"
      },
      body: body ? JSON.stringify(body) : undefined
    });
    const payload = await response.json().catch(() => null) as Record<string, unknown> | null;
    if (!response.ok || !payload) throw codedError(String((payload?.error as any)?.code ?? "workbench_cloud_api_failed"), String((payload?.error as any)?.message ?? `Cloud API returned ${response.status}`), { status: response.status, route });
    return payload;
  };
  return {
    async health() { return { serviceId: "hwlab-workbench", status: "ready", cloudApi: "configured" }; },
    async createSession(input) { return request("POST", "/v1/agent/sessions", input.params, input.actor); },
    async admitTurn(input) {
      await request("POST", "/v1/internal/workbench/admit", { ...input.params, traceId: input.traceId, sessionId: input.sessionId }, input.actor);
      return input;
    },
    async dispatchTurn(input) {
      return request("POST", "/v1/agent/chat", { ...input.params, traceId: input.traceId, sessionId: input.sessionId, shortConnection: true }, input.actor);
    },
    async cancelTurn(input) {
      return request("POST", "/v1/agent/chat/cancel", { ...input.params, traceId: input.traceId }, input.actor);
    }
  };
}

function codedError(code: string, message: string, details?: unknown) { return Object.assign(new Error(message), { code, details }); }