import type { ChannelGroup } from "./channelGroups";
import { CONTRACT } from "./corpus";
import { pageFileName } from "./archive/contract";

export type ChannelEntry = {
  name: string;
  count: number;
  // Channel slug (directory name under transcripts/channels/). Optional for
  // backwards compat with older manifests. Carried so a federating hub can key
  // channels by (origin, slug) without collisions — display names collide
  // across sites, slugs don't.
  slug?: string;
  // Group this channel belongs to (resolved against SiteSettings.groups at
  // index-build time). Optional for backwards compat with older manifests:
  // a missing groupId implies the default group.
  groupId?: string;
};

export type Manifest = {
  version: number;
  totalCount: number;
  pageSize: number;
  pageCount: number;
  generatedAt: string;
  channels: ChannelEntry[];
  // Channel groups + default-group id, surfaced to clients so they can render
  // grouped checkboxes without a second roundtrip. Optional for backwards
  // compat — clients fall back to a synthesized single group.
  groups?: ChannelGroup[];
  defaultGroupId?: string;
  // The site this manifest was built for. The channel/group set is now
  // site-scoped (a subset of the global pool). Optional for backwards compat.
  siteId?: string;
};

// v3: manifests are now per-site (channels/groups are a site selection, not the
// whole pool). Bumped so a stale single-site manifest forces a rebuild.
export const MANIFEST_VERSION = CONTRACT.manifest;
export const SUMMARIES_PAGE_SIZE = CONTRACT.summariesPageSize;

// THE page-shard file name, for every layer. It was three identical copies
// in this file (summaries, transcripts, subs) plus one per layer module;
// `page-0.json` is a 404 on every published archive, so a copy that lost the
// padding would 404 silently against a real site and pass every unit test.
//
// Defined in `archive/contract.ts` — beside CONTRACT.pagePad and the URL
// builders that use it — and re-exported here so the twelve call sites that
// import it from `./manifest` (and the three per-layer aliases in stats.ts /
// posts.ts / digests.ts) are unchanged.
export { pageFileName };

export const TRANSCRIPTS_MANIFEST_VERSION = CONTRACT.transcriptsManifest;

export type ChannelTranscriptsManifest = {
  version: number;
  channelSlug: string;
  pageCount: number;
  maxPageBytes: number;
  generatedAt: string;
  slugToPage: Record<string, number>;
};

// v4: per-site subs manifest (channels/groups are a site selection).
export const SUBS_MANIFEST_VERSION = CONTRACT.subsManifest;

export type SubsChannelEntry = {
  name: string;
  slug: string;
  videoCount: number;
  tracks: string[];
  // Number of videos in this channel that contain a live_chat track. Optional
  // for backwards compat — older manifests don't have it.
  liveChatCount?: number;
  groupId?: string;
};

export type SubsManifest = {
  version: number;
  channels: SubsChannelEntry[];
  totalCount: number;
  // Sum of liveChatCount across all channels; used by the export UI to label
  // the Live chat tab. Optional for backwards compat.
  liveChatTotalCount?: number;
  generatedAt: string;
  groups?: ChannelGroup[];
  defaultGroupId?: string;
  siteId?: string;
};

export const SUBS_CHANNEL_MANIFEST_VERSION = CONTRACT.subsChannelManifest;

export type ChannelSubsManifest = {
  version: number;
  channelSlug: string;
  pageCount: number;
  maxPageBytes: number;
  generatedAt: string;
  tracks: string[];
  slugToPage: Record<string, number>;
};