export const CLAWD_TASK_KIND = "clawd_chat";

export type ClawdTaskStatus =
  | "queued"
  | "running"
  | "completed"
  | "failed"
  | "canceled";

export type ClawdTaskProgressPayload = Record<string, unknown>;

export type ClawdTaskMetadata = {
  composerMode: "clawd";
  source: "openclaw";
  taskKind: typeof CLAWD_TASK_KIND;
  status: ClawdTaskStatus;
  userMessageId: string;
  assistantMessageId: string;
  processingHint: string;
  progressEvents: ClawdTaskProgressPayload[];
  skillTagId?: string | null;
  skillTagName?: string | null;
  requestId?: string | null;
  error?: string | null;
  createdAt: number;
  updatedAt: number;
};

const CLAWD_TASK_STATUSES = new Set<ClawdTaskStatus>([
  "queued",
  "running",
  "completed",
  "failed",
  "canceled",
]);

export function normalizeClawdTaskMetadata(
  value: unknown
): ClawdTaskMetadata | null {
  if (!value || typeof value !== "object" || Array.isArray(value)) return null;
  const raw = value as Record<string, unknown>;
  if (raw.taskKind !== CLAWD_TASK_KIND || raw.composerMode !== "clawd") {
    return null;
  }

  const status = String(raw.status || "") as ClawdTaskStatus;
  const userMessageId = String(raw.userMessageId || "").trim();
  const assistantMessageId = String(raw.assistantMessageId || "").trim();
  if (
    !CLAWD_TASK_STATUSES.has(status) ||
    !userMessageId ||
    !assistantMessageId
  ) {
    return null;
  }

  const createdAt = Number(raw.createdAt);
  const updatedAt = Number(raw.updatedAt);
  return {
    composerMode: "clawd",
    source: "openclaw",
    taskKind: CLAWD_TASK_KIND,
    status,
    userMessageId,
    assistantMessageId,
    processingHint: String(raw.processingHint || "").trim(),
    progressEvents: Array.isArray(raw.progressEvents)
      ? raw.progressEvents.filter(
          (item): item is ClawdTaskProgressPayload =>
            Boolean(item) && typeof item === "object" && !Array.isArray(item)
        )
      : [],
    skillTagId: raw.skillTagId ? String(raw.skillTagId) : null,
    skillTagName: raw.skillTagName ? String(raw.skillTagName) : null,
    requestId: raw.requestId ? String(raw.requestId) : null,
    error: raw.error ? String(raw.error) : null,
    createdAt: Number.isFinite(createdAt) ? createdAt : Date.now(),
    updatedAt: Number.isFinite(updatedAt) ? updatedAt : Date.now(),
  };
}

export function isPendingClawdTaskStatus(status: ClawdTaskStatus) {
  return status === "queued" || status === "running";
}

export function appendClawdTaskProgress(
  current: ClawdTaskProgressPayload[],
  progress: ClawdTaskProgressPayload,
  maxItems = 200
) {
  const eventId = String(progress.event_id || "").trim();
  const sequence = String(progress.sequence || "").trim();
  const key = eventId
    ? `event:${eventId}`
    : sequence
      ? `sequence:${sequence}`
      : [
          String(progress.step_code || ""),
          String(progress.step_state || ""),
          String(progress.message || progress.display || ""),
        ].join("|");
  const next = current.some((item) => {
    const itemEventId = String(item.event_id || "").trim();
    const itemSequence = String(item.sequence || "").trim();
    const itemKey = itemEventId
      ? `event:${itemEventId}`
      : itemSequence
        ? `sequence:${itemSequence}`
        : [
            String(item.step_code || ""),
            String(item.step_state || ""),
            String(item.message || item.display || ""),
          ].join("|");
    return itemKey === key;
  })
    ? current
    : [...current, progress];

  return next.slice(-Math.max(1, maxItems));
}