/** Mirrors child ACP turns into detached-task status for requester-facing progress. */
import { truncateUtf16Safe } from "@openclaw/normalization-core/utf16-slice";
import type { AdmittedRunContext } from "../../agents/admitted-run-context.js";
import { isRetainedExecutionOwnerBinding } from "../../audit/execution-owner-binding.js";
import type { OpenClawConfig } from "../../config/types.openclaw.js";
import { logVerbose } from "../../globals.js";
import { recordSubagentTerminalState } from "../../sessions/session-state-events.js";
import {
  createRunningTaskRun,
  completeTaskRunByRunId,
  failTaskRunByRunId,
  startTaskRunByRunId,
} from "../../tasks/detached-task-runtime.js";
import {
  createNextAcpTaskBackingDetail,
  readTaskBackingInstance,
} from "../../tasks/task-backing-authority.js";
import { resolveRequiredCompletionTerminalResult } from "../../tasks/task-completion-contract.js";
import { bindTaskFlowExecution } from "../../tasks/task-flow-registry.store.sqlite.js";
import { listTasksForRelatedSessionKey } from "../../tasks/task-registry-query.js";
import { bindTaskRunExecution } from "../../tasks/task-registry.store.sqlite.js";
import {
  deliveryContextFromSession,
  type DeliveryContext,
} from "../../utils/delivery-context.shared.js";
import { AcpRuntimeError } from "../runtime/errors.js";
import { ACP_TURN_TIMEOUT_DETAIL_CODE } from "./manager.turn-timeout.js";
import type { AcpRunTurnInput, AcpSessionManagerDeps } from "./manager.types.js";
import { resolveAcpSessionTarget } from "./manager.utils.js";
import { normalizeText } from "./runtime-options.js";

const ACP_BACKGROUND_TASK_TEXT_MAX_LENGTH = 160;
const ACP_BACKGROUND_TASK_PROGRESS_MAX_LENGTH = 240;

/** Context needed to mirror a child ACP turn into the requester task registry. */
type BackgroundTaskContext = {
  agentId: string;
  requesterAgentId: string;
  requesterSessionKey: string;
  requesterOrigin?: DeliveryContext;
  childSessionKey: string;
  runId: string;
  label?: string;
  task: string;
};

type BackgroundTaskRecord = {
  taskId: string;
  parentFlowId?: string;
};

/** Produces the bounded task label shown for a child ACP background run. */
function summarizeBackgroundTaskText(text: string): string {
  const normalized = normalizeText(text) ?? "ACP background task";
  if (normalized.length <= ACP_BACKGROUND_TASK_TEXT_MAX_LENGTH) {
    return normalized;
  }
  return `${truncateUtf16Safe(normalized, ACP_BACKGROUND_TASK_TEXT_MAX_LENGTH - 1)}…`;
}

/** Appends bounded progress text while preserving a single-line task summary. */
export function appendBackgroundTaskProgressSummary(current: string, chunk: string): string {
  const normalizedChunk = chunk.replace(/\s+/g, " ");
  if (!normalizedChunk) {
    return current;
  }
  const chunkToAppend = current ? normalizedChunk : normalizedChunk.trimStart();
  if (!chunkToAppend) {
    return current;
  }
  const combined = `${current}${chunkToAppend}`.replace(/\s+/g, " ");
  if (combined.length <= ACP_BACKGROUND_TASK_PROGRESS_MAX_LENGTH) {
    return combined;
  }
  return `${truncateUtf16Safe(combined, ACP_BACKGROUND_TASK_PROGRESS_MAX_LENGTH - 1)}…`;
}

/** Maps ACP runtime failures to detached-task terminal states. */
export function resolveBackgroundTaskFailureStatus(error: AcpRuntimeError): "failed" | "timed_out" {
  return error.detailCode === ACP_TURN_TIMEOUT_DETAIL_CODE ? "timed_out" : "failed";
}

/** Infers blocked terminal outcomes from final completion text when the child turn reports one. */
export function resolveBackgroundTaskTerminalResult(completionText: string): {
  terminalOutcome?: "blocked";
  terminalSummary?: string;
} {
  const requiredCompletionResult = resolveRequiredCompletionTerminalResult(completionText);
  if (requiredCompletionResult.terminalOutcome) {
    return requiredCompletionResult;
  }
  const normalized = normalizeText(completionText)?.replace(/\s+/g, " ").trim();
  if (!normalized) {
    return {};
  }
  const permissionDeniedMatch = normalized.match(
    /\b(?:write failed:\s*)?permission denied(?: for (?<path>\S+))?\.?/i,
  );
  if (permissionDeniedMatch) {
    const path = normalizeText(permissionDeniedMatch.groups?.path)?.replace(/[.,;:!?]+$/, "");
    return {
      terminalOutcome: "blocked",
      terminalSummary: path ? `Permission denied for ${path}.` : "Permission denied.",
    };
  }
  if (
    /\bneed a writable session\b/i.test(normalized) ||
    /\bfilesystem authorization\b/i.test(normalized) ||
    /`?apply_patch`?/i.test(normalized)
  ) {
    return {
      terminalOutcome: "blocked",
      terminalSummary: "Writable session or apply_patch authorization required.",
    };
  }
  return {};
}

/** Resolves the requester task context for a spawned child ACP session. */
export function resolveBackgroundTaskContext(params: {
  deps: AcpSessionManagerDeps;
  cfg: OpenClawConfig;
  sessionKey: string;
  agentId: string;
  requestId: string;
  text: string;
}): BackgroundTaskContext | null {
  const childEntry = params.deps.loadSessionEntry({
    cfg: params.cfg,
    sessionKey: params.sessionKey,
    agentId: params.agentId,
  })?.entry;
  const requesterSessionKey =
    normalizeText(childEntry?.spawnedBy) ?? normalizeText(childEntry?.parentSessionKey);
  if (!requesterSessionKey) {
    return null;
  }
  const requesterOwners = new Set(
    listTasksForRelatedSessionKey(params.sessionKey)
      .filter(
        (task) =>
          task.runtime === "acp" &&
          task.childSessionKey === params.sessionKey &&
          task.agentId === params.agentId &&
          (task.requesterSessionKey === requesterSessionKey ||
            task.ownerKey === requesterSessionKey),
      )
      .flatMap((task) => (task.requesterAgentId ? [task.requesterAgentId] : [])),
  );
  // Spawn stamps the requesting agent at creation, before the first dispatched
  // turn can reach task registration. This selects parent context, not authority.
  if (
    childEntry?.createdVia === "spawn" &&
    childEntry.createdActor?.type === "agent" &&
    childEntry.createdActor.id
  ) {
    requesterOwners.add(childEntry.createdActor.id);
  }
  if (requesterOwners.size > 1) {
    throw new AcpRuntimeError(
      "ACP_SESSION_INIT_FAILED",
      "ACP requester ownership is ambiguous; repair the child task relationship before retrying.",
    );
  }
  const parentTarget = resolveAcpSessionTarget({
    cfg: params.cfg,
    sessionKey: requesterSessionKey,
    agentId: requesterOwners.values().next().value,
  });
  const parentEntry = params.deps.loadSessionEntry({ cfg: params.cfg, ...parentTarget })?.entry;
  return {
    agentId: params.agentId,
    requesterAgentId: parentTarget.agentId,
    requesterSessionKey,
    requesterOrigin:
      deliveryContextFromSession(parentEntry) ?? deliveryContextFromSession(childEntry),
    childSessionKey: params.sessionKey,
    runId: params.requestId,
    label: normalizeText(childEntry?.label),
    task: summarizeBackgroundTaskText(params.text),
  };
}

export function createBackgroundTaskRecord(
  context: BackgroundTaskContext,
  startedAt: number,
  instanceId: string,
): BackgroundTaskRecord | undefined {
  try {
    const task = createRunningTaskRun({
      runtime: "acp",
      sourceId: context.runId,
      ownerKey: context.requesterSessionKey,
      agentId: context.agentId,
      requesterAgentId: context.requesterAgentId,
      scopeKind: "session",
      requesterOrigin: context.requesterOrigin,
      childSessionKey: context.childSessionKey,
      runId: context.runId,
      label: context.label,
      task: context.task,
      startedAt,
      detail: createNextAcpTaskBackingDetail({
        childSessionKey: context.childSessionKey,
        instanceId,
      }),
    });
    if (!task) {
      logVerbose(
        `acp-manager: failed creating background task for ${context.runId}: persist_failed`,
      );
      return undefined;
    }
    return {
      taskId: task.taskId,
      ...(task.parentFlowId ? { parentFlowId: task.parentFlowId } : {}),
    };
  } catch (error) {
    logVerbose(
      `acp-manager: failed creating background task for ${context.runId}: ${String(error)}`,
    );
    return undefined;
  }
}

/** Mirrors a cancelled actor wait without replacing a same-id predecessor's task. */
export function recordQueuedBackgroundTaskCancellation(params: {
  input: AcpRunTurnInput;
  deps: AcpSessionManagerDeps;
  sessionKey: string;
  agentId: string;
  startedAt: number;
}): void {
  if (params.input.mode !== "prompt") {
    return;
  }
  const { input, sessionKey, agentId } = params;
  const instanceId = input.admittedRunContext.operationalRunInstance.instanceId;
  const existing = listTasksForRelatedSessionKey(sessionKey, agentId).filter(
    (task) =>
      task.runtime === "acp" &&
      task.childSessionKey === sessionKey &&
      task.runId === input.requestId,
  );
  // Actor-wait cancellation bypasses serialization. It must not overwrite task
  // custody retained by an earlier operational instance with the same request id.
  if (
    existing.some((task) => {
      const backing = readTaskBackingInstance(task.detail);
      return backing?.runtime !== "acp" || backing.instanceId !== instanceId;
    })
  ) {
    return;
  }
  const context = resolveBackgroundTaskContext({
    ...params,
    cfg: input.cfg,
    requestId: input.requestId,
    text: input.text,
  });
  if (
    !context ||
    (existing.length === 0 && !createBackgroundTaskRecord(context, params.startedAt, instanceId))
  ) {
    return;
  }
  markBackgroundTaskTerminal(context.runId, {
    sessionKey,
    status: "cancelled",
    endedAt: Date.now(),
    lastEventAt: Date.now(),
    progressSummary: null,
    terminalSummary: null,
  });
  recordSubagentTerminalState({
    childSessionKey: sessionKey,
    runId: context.runId,
    requesterSessionKey: context.requesterSessionKey,
    outcomeStatus: "cancelled",
  });
}

/** Links ACP owner rows only when the runtime reaches its prompt-submitted boundary. */
export function bindBackgroundTaskExecution(
  record: BackgroundTaskRecord,
  admitted: AdmittedRunContext,
): void {
  try {
    const taskResult = bindTaskRunExecution({ admitted, taskId: record.taskId });
    const flowResult = record.parentFlowId
      ? isRetainedExecutionOwnerBinding(taskResult)
        ? bindTaskFlowExecution({ admitted, flowId: record.parentFlowId })
        : taskResult
      : undefined;
    if ([taskResult, flowResult].some((result) => result === "mismatch" || result === "missing")) {
      logVerbose("acp-manager: exact task execution binding was not retained");
    }
  } catch (error) {
    logVerbose(`acp-manager: failed binding background task execution: ${String(error)}`);
  }
}

export function markBackgroundTaskRunning(
  runId: string,
  params: {
    sessionKey?: string;
    lastEventAt?: number;
    progressSummary?: string | null;
  },
): void {
  try {
    startTaskRunByRunId({
      runId,
      runtime: "acp",
      sessionKey: params.sessionKey,
      lastEventAt: params.lastEventAt,
      progressSummary: params.progressSummary,
    });
  } catch (error) {
    logVerbose(`acp-manager: failed updating background task for ${runId}: ${String(error)}`);
  }
}

export function markBackgroundTaskTerminal(
  runId: string,
  params: {
    sessionKey?: string;
    status: "succeeded" | "failed" | "timed_out" | "cancelled";
    endedAt: number;
    lastEventAt?: number;
    error?: string;
    progressSummary?: string | null;
    terminalSummary?: string | null;
    terminalOutcome?: "succeeded" | "blocked" | null;
  },
): void {
  try {
    if (params.status === "succeeded") {
      completeTaskRunByRunId({
        runId,
        runtime: "acp",
        sessionKey: params.sessionKey,
        endedAt: params.endedAt,
        lastEventAt: params.lastEventAt,
        progressSummary: params.progressSummary,
        terminalSummary: params.terminalSummary,
        terminalOutcome: params.terminalOutcome,
      });
      return;
    }
    failTaskRunByRunId({
      runId,
      runtime: "acp",
      sessionKey: params.sessionKey,
      status: params.status,
      endedAt: params.endedAt,
      lastEventAt: params.lastEventAt,
      error: params.error,
      progressSummary: params.progressSummary,
      terminalSummary: params.terminalSummary,
    });
  } catch (error) {
    logVerbose(`acp-manager: failed updating background task for ${runId}: ${String(error)}`);
  }
}