/**
 * Booking Admin TypeScript Types
 *
 * Based on: Booking Admin API Contract v1.1
 * Date: 2025-11-07
 * Phase: Phase 3 (Booking Management)
 */

// ============================================================================
// Core Booking Types
// ============================================================================

export interface BookingDetail {
  booking_id: number;
  status: BookingStatus;
  slot: SlotInfo;
  provider: ProviderInfo;
  booked_by: UserInfo;
  attendees: Attendee[];
  policies: BookingPolicies;
  created_at: string; // ISO8601
  updated_at: string; // ISO8601
  etag: string;
  cancelled_reason?: string;
}

export type BookingStatus = 'confirmed' | 'cancelled' | 'no_show';

export interface SlotInfo {
  slot_instance_id: number;
  starts_at: string; // ISO8601
  ends_at: string; // ISO8601
  capacity: number;
  booked_count: number;
  capacity_remaining: number;
  status: SlotStatus;
  court: CourtInfo;
}

export type SlotStatus = 'open' | 'booked' | 'held' | 'cancelled';

export interface CourtInfo {
  court_id: number;
  name: string;
  facility_id: number;
  facility_name: string;
}

export interface ProviderInfo {
  type: 'local' | 'fairplay';
  manages_slot_storage: boolean;
}

export interface UserInfo {
  app_user_id: number;
  email: string;
  display_name: string;
}

export interface Attendee {
  position: number; // 1-based
  type: AttendeeType;
  app_user_id?: number;
  email?: string;
  display_name?: string;
  remote_member_id?: number;
}

export type AttendeeType = 'app_user' | 'guest' | 'remote_member';

export interface BookingPolicies {
  cancel_grace_minutes: number;
  cancel_grace_anchor: 'start' | 'end';
  move_window_days: number;
}

// ============================================================================
// Request/Response Types
// ============================================================================

/**
 * Cancel Booking Request
 */
export interface CancelBookingRequest {
  status: 'cancelled';
  reason?: string; // max 500 chars
  notify_players?: boolean; // default: true
  prev_updated_at?: string; // ISO8601 (fallback for If-Match)
}

export interface CancelBookingResponse {
  booking_id: number;
  status: 'cancelled';
  slot: SlotInfo;
  cancelled_reason?: string;
  updated_at: string; // ISO8601
  etag: string;
}

/**
 * Move Booking Request
 */
export interface MoveBookingRequest {
  new_slot_instance_id: number;
  reason?: string; // max 500 chars
  notify_players?: boolean; // default: true
  dry_run?: boolean; // default: false
  prev_updated_at?: string; // ISO8601 (fallback for If-Match)
}

export interface MoveBookingResponse {
  booking_id: number;
  status: 'confirmed';
  old_slot: SlotInfo;
  new_slot: SlotInfo;
  move_reason?: string;
  updated_at: string; // ISO8601
  etag: string;
}

export interface MoveDryRunResponse {
  ok: boolean;
  reasons?: string[]; // error codes if ok=false
}

/**
 * Update Attendees Request
 */
export interface UpdateAttendeesRequest {
  attendees: AttendeeInput[];
  reason?: string; // max 500 chars
  notify_players?: boolean; // default: true
  prev_updated_at?: string; // ISO8601 (fallback for If-Match)
}

export interface AttendeeInput {
  position: number; // 1-based
  type: AttendeeType;
  app_user_id?: number;
  remote_member_id?: number;
  display_name?: string;
}

export interface UpdateAttendeesResponse {
  booking_id: number;
  status: 'confirmed';
  attendees: Attendee[];
  slot: SlotInfo;
  updated_at: string; // ISO8601
  etag: string;
}

// ============================================================================
// Error Types (RFC-7807)
// ============================================================================

export interface BookingAdminError {
  type: string;
  title: string;
  status: number;
  detail: string;
  code: BookingErrorCode;
  errors?: ValidationError[];
  meta?: Record<string, any>;
}

export interface ValidationError {
  field: string;
  message: string;
}

export type BookingErrorCode =
  | 'validation_error'
  | 'not_found'
  | 'not_admin_for_club'
  | 'booking_already_cancelled'
  | 'invalid_status_transition'
  | 'slot_full'
  | 'slot_wrong_status'
  | 'slot_different_club'
  | 'slot_different_sport'
  | 'slot_in_past'
  | 'exceeds_capacity'
  | 'past_slot_locked'
  | 'remote_provider_managed'
  | 'capacity_conflict'
  | 'booking_already_exists'
  | 'duplicate_attendee'
  | 'precondition_failed'
  | 'precondition_required'
  | 'idempotency_conflict'
  | 'move_window_exceeded'
  | 'internal_error';

// ============================================================================
// API Result Wrapper
// ============================================================================

export type BookingApiResult<T> =
  | { success: true; data: T; etag?: string }
  | { success: false; error: BookingAdminError };

// ============================================================================
// User-Friendly Error Messages
// ============================================================================

export const ERROR_MESSAGES: Record<BookingErrorCode, { title: string; hint: string }> = {
  remote_provider_managed: {
    title: 'Edits are disabled for this club.',
    hint: "This club is managed by an external provider; changes must be made in the provider's system.",
  },
  capacity_conflict: {
    title: 'Someone just took that spot.',
    hint: "The slot's capacity changed while you were editing. Pick another slot and try again.",
  },
  booking_already_exists: {
    title: 'This slot already has a booking.',
    hint: 'Choose a different time or court.',
  },
  slot_different_sport: {
    title: 'Wrong sport for this booking.',
    hint: "Select a slot that matches the booking's sport.",
  },
  slot_different_club: {
    title: 'Different club.',
    hint: 'You can only move bookings within the same club.',
  },
  slot_wrong_status: {
    title: "That slot isn't open.",
    hint: 'Choose an open slot.',
  },
  slot_full: {
    title: 'That slot is full.',
    hint: 'Select a different time.',
  },
  past_slot_locked: {
    title: "This booking can't be changed anymore.",
    hint: "It's beyond the allowed time window.",
  },
  precondition_failed: {
    title: 'This booking changed in the meantime.',
    hint: 'Refresh and try again.',
  },
  precondition_required: {
    title: 'Outdated data.',
    hint: 'Please retry from the latest booking details.',
  },
  validation_error: {
    title: 'Please fix the highlighted fields.',
    hint: '',
  },
  not_admin_for_club: {
    title: 'No admin access.',
    hint: "You don't have permission for this club.",
  },
  booking_already_cancelled: {
    title: 'This booking is already cancelled.',
    hint: '',
  },
  invalid_status_transition: {
    title: 'Cannot change booking status.',
    hint: '',
  },
  slot_in_past: {
    title: 'That slot already started.',
    hint: 'Select a future time.',
  },
  exceeds_capacity: {
    title: 'Too many attendees.',
    hint: 'Reduce the number of attendees to fit the slot capacity.',
  },
  duplicate_attendee: {
    title: 'Duplicate attendee.',
    hint: 'Each person can only be added once.',
  },
  idempotency_conflict: {
    title: 'Request conflict.',
    hint: 'Please retry your action.',
  },
  move_window_exceeded: {
    title: 'Move window exceeded.',
    hint: 'The target slot is too far from the original booking date.',
  },
  not_found: {
    title: 'Not found.',
    hint: 'The booking or slot you requested does not exist.',
  },
  internal_error: {
    title: 'Something went wrong.',
    hint: 'Please try again later.',
  },
};