import { RunnerManagerApi, failureKindFromError, terminalStatusForFailure, errorMessage } from "./manager-api.js";
import { runBackendTurn, type BackendAdapterOptions } from "../backend/adapter.js";
import type { BackendProfile, JsonRecord, RunRecord, RunnerRecord } from "../common/types.js";

export interface RunnerOnceOptions extends BackendAdapterOptions {
  managerUrl: string;
  runId: string;
  commandId?: string;
  runnerId?: string;
  attemptId?: string;
  leaseMs?: number;
  backendProfile?: BackendProfile;
  placement?: "host-process" | "kubernetes-job";
  sourceCommit?: string;
  jobName?: string;
  podName?: string;
  logPath?: string;
}

export async function runOnce(options: RunnerOnceOptions): Promise<JsonRecord> {
  const api = new RunnerManagerApi(options.managerUrl);
  const leaseMs = options.leaseMs ?? 60_000;
  const attemptId = options.attemptId ?? `attempt_${Date.now().toString(36)}`;
  const runner = await api.register({
    runId: options.runId,
    attemptId,
    backendProfile: options.backendProfile ?? "codex",
    placement: options.placement ?? "host-process",
    sourceCommit: options.sourceCommit ?? process.env.AGENTRUN_SOURCE_COMMIT ?? "unknown",
    ...(options.runnerId ? { runnerId: options.runnerId } : {}),
    ...(options.jobName ? { jobName: options.jobName } : {}),
    ...(options.podName ? { podName: options.podName } : {}),
    ...(options.logPath ? { logPath: options.logPath } : {}),
  }) as RunnerRecord;
  let claimed: RunRecord;
  try {
    claimed = await api.claim(options.runId, runner.id, leaseMs);
    await api.heartbeat(options.runId, runner.id, leaseMs);
  } catch (error) {
    const failureKind = failureKindFromError(error);
    if (failureKind !== "runner-lease-conflict") {
      await api.reportFailure(options.runId, { terminalStatus: terminalStatusForFailure(failureKind), failureKind, failureMessage: errorMessage(error) });
    }
    throw error;
  }
  const commandsResponse = await api.pollCommands(options.runId, { afterSeq: 0, limit: 20, ...(options.commandId ? { commandId: options.commandId } : {}) });
  const command = commandsResponse.selected;
  if (!command) {
    await api.reportStatus(options.runId, { terminalStatus: "blocked", failureKind: "schema-invalid", failureMessage: "no pending turn command" });
    return { runner, claimed, terminalStatus: "blocked", failureKind: "schema-invalid", polledCommands: commandsResponse.items.length };
  }
  await api.ackCommand(command.id);
  const result = await runBackendTurn(claimed, command, options);
  for (const event of result.events) await api.appendEvent(options.runId, event);
  await api.reportCommandStatus(command.id, { terminalStatus: result.terminalStatus, failureKind: result.failureKind, failureMessage: result.failureMessage });
  const finalRun = await api.reportStatus(options.runId, { terminalStatus: result.terminalStatus, failureKind: result.failureKind, failureMessage: result.failureMessage }) as RunRecord;
  return { runner, commandId: command.id, terminalStatus: result.terminalStatus, failureKind: result.failureKind, run: finalRun } as JsonRecord;
}