// ============================================================================
// API Types - Generated from API_DOCUMENTATION.md
// ============================================================================

// ----------------------------------------------------------------------------
// User & Auth
// ----------------------------------------------------------------------------

export interface User {
  id: string; // UUID
  telegram_id: number;
  username: string | null;
}

export interface AuthInitResponse {
  bot_username: string;
  start_param: string; // "login"
}

export interface AuthCompleteRequest {
  token: string; // one-time token from bot
}

export interface AuthCompleteResponse {
  access_token: string;
  refresh_token: string;
  user: User;
}

export interface AuthRefreshRequest {
  refresh_token: string;
}

export interface AuthRefreshResponse {
  access_token: string;
}

// ----------------------------------------------------------------------------
// Target Channel
// ----------------------------------------------------------------------------

// Основная структура как возвращает API
export interface TargetChannel {
  id: string; // UUID
  telegram_id: number;
  title: string;
  username: string | null;
  is_active: boolean;
}

// Расширенная версия с дополнительными полями (пока не реализовано на бекенде)
export interface TargetChannelDetail extends TargetChannel {
  // В будущем можно добавить статистику
}

export interface TargetChannelUpdateRequest {
  is_active?: boolean;
}

export interface TargetChannelsListResponse {
  target_channels: TargetChannel[];
}

// ----------------------------------------------------------------------------
// External Channel
// ----------------------------------------------------------------------------

// Основная структура как возвращает API
export interface ExternalChannel {
  id: string; // UUID
  telegram_id: number;
  title: string;
  username: string | null;
  description: string | null;
  subscribers_count: number | null;
}

export interface ExternalChannelCreateRequest {
  telegram_id: number;
  title: string;
  username?: string | null;
  description?: string | null;
  subscribers_count?: number | null;
  target_channel_ids: string[]; // UUID[]
}

export interface ExternalChannelUpdateRequest {
  title?: string;
  username?: string | null;
  description?: string | null;
  subscribers_count?: number | null;
}

export interface ExternalChannelLinksUpdateRequest {
  add_target_channel_ids?: string[];
  remove_target_channel_ids?: string[];
}

export interface ExternalChannelsListResponse {
  external_channels: ExternalChannel[];
}

// ----------------------------------------------------------------------------
// Creative
// ----------------------------------------------------------------------------

export type CreativeStatus = "active" | "archived";

export interface Creative {
  id: string;
  name: string;
  text: string;
  target_channel_id: string;
  target_channel_title: string;
  created_at: string;
  status: CreativeStatus;
  placements_count: number;
}

export interface CreativesListResponse {
  creatives: Creative[];
}

export interface CreativeCreateRequest {
  name: string;
  text: string;
  target_channel_id: string;
}

export interface CreativeUpdateRequest {
  name?: string;
  text?: string;
  status?: CreativeStatus;
}

// ----------------------------------------------------------------------------
// Placement (Purchase)
// ----------------------------------------------------------------------------

export type InviteLinkType = "public" | "approval";
export type PlacementStatus = "active" | "archived";
export type ViewsAvailability =
  | "unknown"
  | "available"
  | "unavailable"
  | "manual";

export interface Placement {
  id: string;
  target_channel_id: string;
  target_channel_title: string;
  external_channel_id: string;
  external_channel_title: string;
  creative_id: string;
  creative_name: string;
  placement_date: string;
  cost: number | null;
  comment: string | null;
  ad_post_url: string | null;
  invite_link_type: InviteLinkType;
  invite_link: string;
  status: PlacementStatus;
  subscriptions_count: number;
  views_count: number | null;
  views_availability: ViewsAvailability;
  last_views_fetch_at: string | null;
  created_at: string;
}

export interface PlacementsListResponse {
  placements: Placement[];
}

export interface PlacementCreateRequest {
  target_channel_id: string;
  external_channel_id: string;
  creative_id: string;
  placement_date: string;
  cost?: number | null;
  comment?: string | null;
  ad_post_url?: string | null;
  invite_link_type?: InviteLinkType;
}

export interface PlacementUpdateRequest {
  placement_date?: string;
  cost?: number | null;
  comment?: string | null;
  ad_post_url?: string | null;
  status?: PlacementStatus;
}

// Legacy aliases for backwards compatibility
export type Purchase = Placement;
export type PurchaseCreateRequest = PlacementCreateRequest;
export type PurchaseUpdateRequest = PlacementUpdateRequest;

export interface ViewsFetchResponse {
  placement_id: string;
  views_count: number | null;
  views_availability: ViewsAvailability;
  fetched_at: string;
  error_message: string | null;
}

export interface ViewsHistoryResponse {
  histories: ViewsSnapshot[];
}

// ----------------------------------------------------------------------------
// Subscription
// ----------------------------------------------------------------------------

export interface Subscription {
  id: string;
  purchase_id: string;
  telegram_user_id: number;
  user_first_name: string;
  user_last_name: string | null;
  user_username: string | null;
  subscribed_at: string; // ISO 8601
  is_active: boolean;
  event_type: "chat_member" | "join_request";
}

// ----------------------------------------------------------------------------
// Views Snapshot
// ----------------------------------------------------------------------------

export interface ViewsSnapshot {
  id: string;
  purchase_id: string;
  views: number;
  fetched_at: string; // ISO 8601
}

// ----------------------------------------------------------------------------
// Analytics
// ----------------------------------------------------------------------------

export interface AnalyticsOverview {
  totalPurchases: number;
  purchasesChange: number;
  totalFollowers: number;
  followersChange: number;
  averageCpf: number;
  cpfChange: number;
  averageCpm: number;
  cpmChange: number;
  topChannelsByCpf: {
    channel_id: string;
    channel_name: string;
    total_purchases: number;
    avg_cpf: number;
  }[];
  topCreativesByCpf: {
    creative_id: string;
    creative_name: string;
    total_subscriptions: number;
    avg_cpf: number;
  }[];
}

export type GroupByPeriod = "day" | "week" | "month" | "quarter" | "year";

export interface AnalyticsCostsDataPoint {
  period: string; // ISO 8601 date (start of period)
  cost: number;
  purchases_count: number;
  subscriptions: number;
}

export interface AnalyticsCostsResponse {
  data: AnalyticsCostsDataPoint[];
}

export interface CostsReport {
  totalCost: number;
  averageCost: number;
  periods: {
    date: string;
    total_cost: number;
    purchases_count: number;
    avg_cost: number;
  }[];
}

export interface AnalyticsChannelData {
  channel_id: string;
  channel_name: string;
  purchases_count: number;
  total_cost: number;
  total_subscriptions: number;
  avg_cpf: number;
  avg_cpm: number;
}

export interface AnalyticsChannelsResponse {
  data: AnalyticsChannelData[];
}

export interface AnalyticsCreativeData {
  creative_id: string;
  creative_name: string;
  purchases_count: number;
  total_cost: number;
  total_subscriptions: number;
  avg_cpf: number;
  conversion_rate: number;
}

export interface AnalyticsCreativesResponse {
  data: AnalyticsCreativeData[];
}

// ----------------------------------------------------------------------------
// Common API Responses
// ----------------------------------------------------------------------------

export interface ListResponse<T> {
  data: T[];
  total: number;
}

export interface SuccessResponse {
  success: boolean;
}

export interface ApiError {
  error: {
    code: string;
    message: string;
    details?: any;
  };
}

// ----------------------------------------------------------------------------
// Query Parameters
// ----------------------------------------------------------------------------

export interface TargetChannelQueryParams {
  is_active?: boolean;
}

export interface ExternalChannelQueryParams {
  target_channel_id?: string;
  search?: string;
}

export interface CreativeQueryParams {
  target_channel_id?: string;
  is_archived?: boolean;
}

export interface PlacementQueryParams {
  target_channel_id?: string;
  external_channel_id?: string;
  creative_id?: string;
  is_archived?: boolean;
  date_from?: string; // ISO 8601
  date_to?: string; // ISO 8601
  sort?: "date" | "cost" | "cpf" | "subscriptions";
  order?: "asc" | "desc";
}

export interface AnalyticsOverviewQueryParams {
  target_channel_id?: string;
  date_from?: string;
  date_to?: string;
}

export interface AnalyticsCostsQueryParams {
  target_channel_id?: string;
  date_from: string; // required
  date_to: string; // required
  group_by: GroupByPeriod;
}

export interface AnalyticsChannelsQueryParams {
  target_channel_id?: string;
  date_from?: string;
  date_to?: string;
  type: "external" | "target";
}

export interface AnalyticsCreativesQueryParams {
  target_channel_id?: string;
  date_from?: string;
  date_to?: string;
}