export type DiscussionStatus = "active" | "closed";

export type DiscussionMetadata = {
  mode: "discussion";
  discussionChannelId: string;
  originChannelId: string;
  initiatorAgentId: string;
  initiatorSessionId: string;
  discussGuide: string;
  status: DiscussionStatus;
  createdAt: string;
  completedAt?: string;
  summaryPath?: string;
  idleReminderSent?: boolean;
};

const discussionByChannelId = new Map<string, DiscussionMetadata>();

export function createDiscussion(metadata: DiscussionMetadata): DiscussionMetadata {
  discussionByChannelId.set(metadata.discussionChannelId, metadata);
  return metadata;
}

export function getDiscussion(channelId: string): DiscussionMetadata | undefined {
  return discussionByChannelId.get(channelId);
}

export function isDiscussionChannel(channelId: string): boolean {
  return discussionByChannelId.has(channelId);
}

export function isDiscussionClosed(channelId: string): boolean {
  return discussionByChannelId.get(channelId)?.status === "closed";
}

export function markDiscussionIdleReminderSent(channelId: string): void {
  const rec = discussionByChannelId.get(channelId);
  if (!rec) return;
  rec.idleReminderSent = true;
}

export function clearDiscussionIdleReminderSent(channelId: string): void {
  const rec = discussionByChannelId.get(channelId);
  if (!rec) return;
  rec.idleReminderSent = false;
}

export function closeDiscussion(channelId: string, summaryPath: string): DiscussionMetadata | undefined {
  const rec = discussionByChannelId.get(channelId);
  if (!rec) return undefined;
  rec.status = "closed";
  rec.summaryPath = summaryPath;
  rec.completedAt = new Date().toISOString();
  return rec;
}