/**
 * Subscriptions API Client
 *
 * API functions for subscription and license management
 */

import { get, post } from './client';

/**
 * Subscription plan types
 */
export type SubscriptionPlan = 'FREE' | 'STARTER' | 'PRO' | 'ENTERPRISE';

/**
 * Subscription status types
 */
export type SubscriptionStatus =
  | 'ACTIVE'
  | 'PAST_DUE'
  | 'CANCELED'
  | 'INCOMPLETE'
  | 'INCOMPLETE_EXPIRED'
  | 'TRIALING'
  | 'UNPAID'
  | 'PAUSED';

/**
 * Billing interval types
 */
export type BillingInterval = 'monthly' | 'yearly';

/**
 * Plan details
 */
export interface PlanDetails {
  plan: SubscriptionPlan;
  name: string;
  maxLicenses: number;
  monthlyPriceEur: number;
  yearlyPriceEur: number;
  features: string[];
}

/**
 * License response
 */
export interface LicenseResponse {
  id: string;
  userId: string;
  userEmail: string;
  userName: string;
  userRole: string;
  status: 'ACTIVE' | 'REVOKED';
  assignedAt: string;
  revokedAt?: string;
}

/**
 * Subscription overview response
 */
export interface SubscriptionOverviewResponse {
  id: string;
  organizationId: string;
  plan: SubscriptionPlan;
  planDetails: PlanDetails;
  status: SubscriptionStatus;
  usedLicenses: number;
  maxLicenses: number;
  availableLicenses: number;
  cancelAtPeriodEnd: boolean;
  currentPeriodStart?: string;
  currentPeriodEnd?: string;
  createdAt: string;
  updatedAt: string;
  licenses: LicenseResponse[];
}

/**
 * Can invite response
 */
export interface CanInviteResponse {
  canInvite: boolean;
  availableLicenses: number;
  usedLicenses: number;
  maxLicenses: number;
  message?: string;
}

/**
 * All plans response
 */
export interface AllPlansResponse {
  plans: PlanDetails[];
}

/**
 * Checkout session request
 */
export interface CreateCheckoutSessionRequest {
  plan: SubscriptionPlan;
  billingInterval: BillingInterval;
  successUrl?: string;
  cancelUrl?: string;
}

/**
 * Checkout session response
 */
export interface CheckoutSessionResponse {
  sessionId: string;
  sessionUrl: string;
}

/**
 * Portal session request
 */
export interface CreatePortalSessionRequest {
  returnUrl?: string;
}

/**
 * Portal session response
 */
export interface PortalSessionResponse {
  sessionUrl: string;
}

/**
 * Get subscription overview for current organization
 */
export async function getSubscriptionOverview(): Promise<SubscriptionOverviewResponse> {
  return get<SubscriptionOverviewResponse>('/api/v1/subscriptions');
}

/**
 * Get all available plans
 */
export async function getAllPlans(): Promise<AllPlansResponse> {
  return get<AllPlansResponse>('/api/v1/subscriptions/plans');
}

/**
 * Check if organization can invite more users
 */
export async function canInviteUser(): Promise<CanInviteResponse> {
  return get<CanInviteResponse>('/api/v1/subscriptions/can-invite');
}

/**
 * Create a Stripe Checkout session for subscription upgrade
 */
export async function createCheckoutSession(
  data: CreateCheckoutSessionRequest,
): Promise<CheckoutSessionResponse> {
  return post<CheckoutSessionResponse>('/api/v1/subscriptions/checkout', data);
}

/**
 * Create a Stripe Customer Portal session
 */
export async function createPortalSession(
  data?: CreatePortalSessionRequest,
): Promise<PortalSessionResponse> {
  return post<PortalSessionResponse>('/api/v1/subscriptions/portal', data || {});
}

/**
 * Sync subscription from Stripe
 * Useful when webhooks are not available (e.g., local development)
 * @param sessionId - Optional Stripe checkout session ID (pass after checkout completes)
 */
export async function syncSubscriptionFromStripe(sessionId?: string): Promise<SubscriptionOverviewResponse> {
  return post<SubscriptionOverviewResponse>('/api/v1/subscriptions/sync', { sessionId });
}

/**
 * Format price for display
 */
export function formatPrice(amount: number, currency = 'EUR'): string {
  return new Intl.NumberFormat('fr-FR', {
    style: 'currency',
    currency,
    minimumFractionDigits: 0,
    maximumFractionDigits: 0,
  }).format(amount);
}

/**
 * Get plan badge color class
 */
export function getPlanBadgeColor(plan: SubscriptionPlan): string {
  switch (plan) {
    case 'FREE':
      return 'bg-gray-100 text-gray-800';
    case 'STARTER':
      return 'bg-blue-100 text-blue-800';
    case 'PRO':
      return 'bg-purple-100 text-purple-800';
    case 'ENTERPRISE':
      return 'bg-amber-100 text-amber-800';
    default:
      return 'bg-gray-100 text-gray-800';
  }
}

/**
 * Get status badge color class
 */
export function getStatusBadgeColor(status: SubscriptionStatus): string {
  switch (status) {
    case 'ACTIVE':
    case 'TRIALING':
      return 'bg-green-100 text-green-800';
    case 'PAST_DUE':
      return 'bg-yellow-100 text-yellow-800';
    case 'CANCELED':
    case 'INCOMPLETE_EXPIRED':
    case 'UNPAID':
      return 'bg-red-100 text-red-800';
    case 'INCOMPLETE':
    case 'PAUSED':
      return 'bg-gray-100 text-gray-800';
    default:
      return 'bg-gray-100 text-gray-800';
  }
}