// ============================================================================
// API Types - Based on actual API responses
// ============================================================================

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

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

export interface AuthCompleteResponse {
  access_token: string;
}

// ----------------------------------------------------------------------------
// Pagination
// ----------------------------------------------------------------------------

export interface PaginatedResponse<T> {
  items: T[];
  total: number;
  page: number;
  size: number;
  pages: number;
}

export interface PaginationParams {
  page?: number;
  size?: number;
}

// ----------------------------------------------------------------------------
// Workspaces
// ----------------------------------------------------------------------------

export interface Workspace {
  id: string; // UUID
  name: string;
  avatar_url?: string | null;
}

export interface WorkspaceCreateRequest {
  name: string;
  avatar_file?: File | null;
}

export interface WorkspaceUpdateRequest {
  name?: string;
}

// ----------------------------------------------------------------------------
// Workspace Members & Permissions
// ----------------------------------------------------------------------------

export type WorkspaceUserStatus = "active" | "invited";

export type PermissionKey =
  | "admin_full"
  | "projects_read"
  | "projects_write"
  | "placements_read"
  | "placements_write"
  | "analytics_read";

export type PermissionScopeType = "project";

export interface PermissionScope {
  type: PermissionScopeType;
  id: string; // UUID
}

export interface Permission {
  key: PermissionKey;
  scopes?: PermissionScope[];
}

export interface WorkspaceMemberUser {
  id: string; // user_id
  telegram_id: number;
  username: string | null;
  first_name: string | null;
  last_name: string | null;
}

export interface WorkspaceMember {
  id: string; // member record id
  status: WorkspaceUserStatus;
  user: WorkspaceMemberUser;
  permissions: Permission[];
}

export interface UpdatePermissionsRequest {
  permissions: Permission[];
}

// ----------------------------------------------------------------------------
// Workspace Invites
// ----------------------------------------------------------------------------

export type WorkspaceInviteStatus = "pending" | "accepted" | "rejected";

export interface WorkspaceInvite {
  id: string; // UUID
  username: string;
  status: WorkspaceInviteStatus;
  created_at: string;
}

export interface WorkspaceInviteCreateRequest {
  username: string; // без @
}

// ----------------------------------------------------------------------------
// Projects (Target Channels)
// ----------------------------------------------------------------------------

export type ProjectStatus = "active" | "inactive" | "archived";

export interface Project {
  id: string; // UUID
  telegram_id: number;
  title: string;
  username: string | null;
  status: ProjectStatus;
  subscribers_count?: number;
  purchase_invite_type_default?: "public" | "approval";
}

// ----------------------------------------------------------------------------
// Channels (Catalog for Placements)
// ----------------------------------------------------------------------------

export type ChannelStatus = "active" | "inactive" | "archived";

export interface Channel {
  id: string; // UUID
  telegram_id: number;
  title: string;
  username: string | null;
  description?: string | null;
  subscribers_count?: number;
}

export interface ChannelsQueryParams extends PaginationParams {
  username?: string;
}

// ----------------------------------------------------------------------------
// Purchase Plan
// ----------------------------------------------------------------------------

export type PurchasePlanStatus = "planned" | "completed" | "cancelled";

export interface PurchasePlanChannel {
  id: string; // UUID
  status: PurchasePlanStatus;
  planned_cost: number | null;
  comment: string | null;
  channel: {
    id: string;
    telegram_id: number;
    title: string;
    username: string | null;
  };
}

export interface PurchasePlanChannelCreateRequest {
  channel_id: string;
  planned_cost?: number;
  comment?: string;
}

export interface PurchasePlanChannelUpdateRequest {
  planned_cost?: number;
  comment?: string;
}

// ----------------------------------------------------------------------------
// Creatives
// ----------------------------------------------------------------------------

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

export interface Creative {
  id: string; // UUID
  name: string;
  text: string; // Contains {invite_link} placeholder
  project_id: string;
  project_channel_title: string;
  created_at: string;
  status: CreativeStatus;
  placements_count: number;
}

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

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

export interface CreativesQueryParams extends PaginationParams {
  project_id?: string;
  include_archived?: boolean;
}

// ----------------------------------------------------------------------------
// Placements
// ----------------------------------------------------------------------------

export type PlacementStatus =
  | "Без статуса"
  | "Написать"
  | "Ждём ответа"
  | "Согласование условий"
  | "Оплатить"
  | "Оплачено"
  | "Отмена"
  | "Не подходит цена"
  | "Неактуально"
  | "Не отвечает";

export type InviteLinkType = "public" | "approval";
export type PostViewsAvailability =
  | "unknown"
  | "available"
  | "unavailable"
  | "manual";

export interface PlacementChannel {
  id: string;
  telegram_id: number;
  title: string;
  username: string | null;
  subscribers_count?: number;
}

export interface PlacementCostInfo {
  type: "fixed" | "cpm";
  value: number;
}

export interface PlacementDetails {
  placement_at: string | null; // ISO 8601
  payment_at: string | null; // ISO 8601
  cost: PlacementCostInfo | null;
  cost_before_bargain: number | null;
  placement_type: string | null;
  format: string | null;
  comment: string | null;
  creative_id: string | null;
}

export interface PlacementPost {
  subscriptions_count: number;
  views_count: number | null;
  created_at: string;
  post: {
    id: string;
    message_id: number;
    text: string;
    url: string | null;
    deleted_from_channel_at: string | null;
    created_at: string;
    updated_at: string;
  } | null;
}

export interface Placement {
  id: string;
  status: PlacementStatus;
  creative_id: string | null;
  comment: string | null;
  invite_link: string | null;
  invite_link_type: InviteLinkType;
  channel: PlacementChannel;
  details: PlacementDetails | null;
  placement_post: PlacementPost | null;
  created_at: string;
}

export interface PlacementWithStats extends Placement {
  cpf: number | null;
  cpm: number | null;
}

export interface PlacementsGroupedByChannel {
  channel: PlacementChannel;
  placements: PlacementWithStats[];
  total_cost: number;
  total_subscriptions: number;
  total_views: number;
}

export interface ProjectPlacementsSummary {
  total_placements: number;
  total_channels: number;
  total_cost: number;
  total_subscriptions: number;
  total_views: number;
  avg_cpf: number | null;
  avg_cpm: number | null;
}

export interface PlacementCreateRequest {
  project_id: string;
  placement_channel_id: string;
  creative_id: string;
  placement_date: string; // ISO 8601
  cost?: number;
  comment?: string;
  ad_post_url?: string;
  invite_link_type: InviteLinkType;
}

export interface PlacementUpdateRequest {
  placement_date?: string;
  cost?: number;
  comment?: string;
  ad_post_url?: string;
}

export interface PlacementsQueryParams extends PaginationParams {
  project_id?: string;
  placement_channel_id?: string;
  creative_id?: string;
  include_archived?: boolean;
}

// ----------------------------------------------------------------------------
// Views History
// ----------------------------------------------------------------------------

export interface ViewsHistoryItem {
  id: string; // UUID
  views_count: number;
  fetched_at: string; // ISO 8601
}

export interface ViewsHistoryQueryParams extends PaginationParams {
  from_date?: string;
  to_date?: string;
}

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

export type DateGrouping = "day" | "week" | "month" | "DAY" | "WEEK" | "MONTH";

// Placements Analytics (Projects Analytics)
export interface PlacementAnalyticsItem {
  id: string; // UUID
  project_id: string; // UUID
  project_channel_title: string;
  placement_channel_id: string; // UUID
  placement_channel_title: string;
  creative_id: string; // UUID
  creative_name: string;
  placement_date: string; // ISO 8601
  cost: number;
  subscriptions_count: number;
  views_count: number;
  cpf: number;
  cpm: number;
  post_url?: string | null;
}

export interface PlacementsAnalyticsQueryParams extends PaginationParams {
  project_id?: string;
  placement_channel_id?: string;
  creative_id?: string;
  date_from?: string;
  date_to?: string;
}

// Creatives Analytics (matches actual API response)
export interface CreativeAnalyticsItem {
  id: string;
  name: string;
  placements_count: number;
  total_cost: number;
  total_subscriptions: number;
  total_views: number;
  avg_cpf: number | null; // cost per follower (same as CPS)
  avg_cpm: number | null;
}

// Channels Analytics
export interface ChannelAnalyticsItem {
  channel_id: string;
  channel_title: string;
  channel_username: string | null;
  placements_count: number;
  total_cost: number;
  total_subscriptions: number;
  total_views: number;
  avg_cps: number | null;
  avg_cpm: number | null;
}

// Spending Analytics
export interface SpendingDataPoint {
  period: string;
  cost: number;
  subscriptions: number;
  views: number;
  cpf: number | null;
  cpm: number | null;
}

export interface SpendingAnalytics {
  chart_data: SpendingDataPoint[];
  total_cost: number;
  total_subscriptions: number;
  total_views: number;
  avg_cpf: number | null;
  avg_cpm: number | null;
  placements_count: number;
}

export interface AnalyticsQueryParams extends PaginationParams {
  project_id?: string;
}

// Projects Analytics Chart API
export interface ProjectsAnalyticsMetrics {
  total_cost: number;
  purchases_count: number;
  total_subscriptions: number;
  total_views: number;
  avg_cpf: number | null;
  avg_cpm: number | null;
  avg_post_cost: number | null;
  clicks_count: number;
  reach_volume: number;
  total_discounts: number | null;
  avg_discount_percent: number | null;
  avg_conversion: number | null;
}

export interface ProjectsAnalyticsPeriod {
  period: string;
  period_label: string;
  metrics: ProjectsAnalyticsMetrics;
}

export interface ProjectsAnalyticsResponse {
  periods: ProjectsAnalyticsPeriod[];
  totals: ProjectsAnalyticsMetrics;
}

export interface ProjectsAnalyticsQueryParams {
  project_ids?: string[];
  date_from?: string;
  date_to?: string;
  grouping: "day" | "week" | "month" | "quarter";
  date_grouping: "purchase_date" | "link_date" | "placement_date";
  metrics?: string[];
}

export interface SpendingAnalyticsQueryParams {
  project_id?: string;
  date_from?: string;
  date_to?: string;
  grouping?: DateGrouping;
}

// Overview Analytics
export interface OverviewMetric {
  value: number;
  delta_percent: number;
}

export interface OverviewDailyStat {
  date: string; // YYYY-MM-DD
  cost: number;
  subscriptions: number;
  subscriptions_delta: number;
  cpf: number;
}

export interface OverviewChannelCpf {
  channel_id: string;
  title: string;
  username: string | null;
  cpf: number;
  total_cost: number;
  subscriptions: number;
}

export interface OverviewProjectSpending {
  project_id: string;
  project_title: string;
  project_username: string | null;
  total_cost: number;
}

export interface OverviewAnalytics {
  total_cost: OverviewMetric;
  total_reach: OverviewMetric;
  placements_count: OverviewMetric;
  subscriptions_count: OverviewMetric;
  avg_cpm: OverviewMetric;
  avg_cpf: OverviewMetric;
  daily_stats: OverviewDailyStat[];
  top_channels_by_cpf: OverviewChannelCpf[];
  worst_channels_by_cpf: OverviewChannelCpf[];
  project_spending: OverviewProjectSpending[];
}

export interface OverviewAnalyticsQueryParams {
  project_id?: string;
  date_from?: string;
  date_to?: string;
}

// ----------------------------------------------------------------------------
// Common Types
// ----------------------------------------------------------------------------

export interface ApiError {
  detail: string;
}

// ----------------------------------------------------------------------------
// Legacy Aliases (for backwards compatibility during migration)
// ----------------------------------------------------------------------------

/** @deprecated Use Project instead */
export type TargetChannel = Project;

/** @deprecated Use Channel instead */
export type ExternalChannel = Channel;

/** @deprecated Use PlacementCreateRequest with new fields */
export type PurchaseCreateRequest = PlacementCreateRequest;