export interface Me {
  id: number;
  email: string;
  display_name: string | null;
  avatar_url: string | null;
  role: string;
  preferences: Record<string, any>;
}

export interface Tag {
  id: number;
  name: string;
  color: string | null;
  category: string;
  system: boolean;
  channel_count: number;
}

export interface Video {
  id: string;
  title: string | null;
  channel_id: string;
  channel_title: string | null;
  channel_thumbnail: string | null;
  channel_url: string;
  published_at: string | null;
  thumbnail_url: string | null;
  duration_seconds: number | null;
  view_count: number | null;
  is_short: boolean;
  live_status: string;
  status: string;
  watch_url: string;
}

export interface FeedResponse {
  items: Video[];
  has_more: boolean;
  offset: number;
  limit: number;
}

export interface FeedFilters {
  tags: number[];
  tagMode: "or" | "and";
  q: string;
  sort: string;
  includeNormal: boolean;
  includeShorts: boolean;
  includeLive: boolean;
  show: string;
  channelId?: string;
  channelName?: string;
  maxAgeDays?: number;
  minDuration?: number;
  maxDuration?: number;
  dateFrom?: string;
  dateTo?: string;
}

class HttpError extends Error {
  status: number;
  constructor(status: number) {
    super(`HTTP ${status}`);
    this.status = status;
  }
}

async function req(url: string, opts: RequestInit = {}): Promise<any> {
  const r = await fetch(url, {
    credentials: "include",
    headers: { "Content-Type": "application/json" },
    ...opts,
  });
  if (!r.ok) throw new HttpError(r.status);
  return r.status === 204 ? null : r.json();
}

function feedQuery(f: FeedFilters, offset: number, limit: number): string {
  const p = new URLSearchParams();
  f.tags.forEach((t) => p.append("tags", String(t)));
  p.set("tag_mode", f.tagMode);
  if (f.q) p.set("q", f.q);
  p.set("sort", f.sort);
  p.set("show_normal", String(f.includeNormal));
  p.set("include_shorts", String(f.includeShorts));
  p.set("include_live", String(f.includeLive));
  p.set("show", f.show);
  if (f.channelId) p.set("channel_id", f.channelId);
  if (f.maxAgeDays) p.set("max_age_days", String(f.maxAgeDays));
  if (f.dateFrom) p.set("published_after", f.dateFrom);
  if (f.dateTo) p.set("published_before", f.dateTo);
  if (f.minDuration != null) p.set("min_duration", String(f.minDuration));
  if (f.maxDuration != null) p.set("max_duration", String(f.maxDuration));
  p.set("offset", String(offset));
  p.set("limit", String(limit));
  return p.toString();
}

export const api = {
  me: (): Promise<Me> => req("/api/me"),
  tags: (): Promise<Tag[]> => req("/api/tags"),
  status: (): Promise<any> => req("/api/sync/status"),
  feed: (f: FeedFilters, offset: number, limit: number): Promise<FeedResponse> =>
    req(`/api/feed?${feedQuery(f, offset, limit)}`),
  setState: (id: string, status: string) =>
    req(`/api/videos/${id}/state`, { method: "POST", body: JSON.stringify({ status }) }),
  savePrefs: (p: Record<string, any>) =>
    req("/api/me/preferences", { method: "PUT", body: JSON.stringify(p) }),
};

export { HttpError };