import request, { withSignal } from './request'

// === Types ===

export interface BillingPlan {
  id: string
  name: string
  display_name: string
  description: string | null
  price_cents: number
  currency: string
  interval: string
  features: Record<string, unknown>
  limits: Record<string, unknown>
  is_default: boolean
  sort_order: number
  status: string
  created_at: string
  updated_at: string
}

export interface Subscription {
  id: string
  account_id: string
  plan_id: string
  status: string
  current_period_start: string
  current_period_end: string
  trial_end: string | null
  canceled_at: string | null
  cancel_at_period_end: boolean
  created_at: string
  updated_at: string
}

export interface UsageQuota {
  id: string
  account_id: string
  period_start: string
  period_end: string
  input_tokens: number
  output_tokens: number
  relay_requests: number
  hand_executions: number
  pipeline_runs: number
  max_input_tokens: number | null
  max_output_tokens: number | null
  max_relay_requests: number | null
  max_hand_executions: number | null
  max_pipeline_runs: number | null
  created_at: string
  updated_at: string
}

export interface SubscriptionInfo {
  plan: BillingPlan
  subscription: Subscription | null
  usage: UsageQuota
}

export interface PaymentResult {
  payment_id: string
  trade_no: string
  pay_url: string
  amount_cents: number
}

export interface PaymentStatus {
  id: string
  method: string
  amount_cents: number
  currency: string
  status: string
}

// === Service ===

export const billingService = {
  listPlans: (signal?: AbortSignal) =>
    request.get<BillingPlan[]>('/billing/plans', withSignal({}, signal))
      .then((r) => r.data),

  getSubscription: (signal?: AbortSignal) =>
    request.get<SubscriptionInfo>('/billing/subscription', withSignal({}, signal))
      .then((r) => r.data),

  createPayment: (data: { plan_id: string; payment_method: 'alipay' | 'wechat' }) =>
    request.post<PaymentResult>('/billing/payments', data).then((r) => r.data),

  getPaymentStatus: (id: string, signal?: AbortSignal) =>
    request.get<PaymentStatus>(`/billing/payments/${id}`, withSignal({}, signal))
      .then((r) => r.data),
}