export type PaymentStatus = "Pending" | "Partial" | "Paid"

export interface SubscriptionMemberInfo {
  subscriptionMemberId: string
  customerId: string
  cusName?: string | null
  email?: string | null
  primaryPH?: string | null
  isPrimary: boolean
  joinedAt: string
  isActive: boolean
  /** False when unassigned from the plan but still a member of the gym. */
  isPlanAssigned?: boolean
}

export interface SubscriptionInstallment {
  subscriptionInstallmentId: string
  installmentNo: number
  dueDate: string
  amount: number
  paidAmount: number
  status: PaymentStatus
}

export interface AutoChargeCard {
  cardId: string
  cardLast4?: string | null
  cardType?: string | null
}

export interface MemberCard {
  jobId: string
  cardId?: string | null
  cardNumber?: string | null
  cardType?: string | null
  nickName?: string | null
  isPrimary: boolean
  consentGiven: boolean
}

/** GET client/subscriptions/{id}. */
export interface SubscriptionSummary {
  subscriptionId: string
  customerPlanId: string
  planName?: string | null
  planScope: "Individual" | "Group"
  memberLimit: number
  durationMode: "Rolling" | "FixedRange"
  allowSplitPayments: boolean
  planPrice: number
  onboardDate: string
  /** Frozen at creation, never changes again -- see renewalDate for the current cycle end. */
  expiryDate?: string | null
  renewalDate?: string | null
  isActive: boolean
  customerInvoiceId?: string | null
  invoiceAmount: number
  paidAmount: number
  balance: number
  paymentStatus: PaymentStatus
  members: SubscriptionMemberInfo[]
  installments: SubscriptionInstallment[]
  autoChargeEnabled: boolean
  autoChargeCard?: AutoChargeCard | null
}

export interface SubscriptionPayment {
  attemptId: string
  payDate?: string | null
  payStatus: string
  payAmount: number
  payNote?: string | null
  refType?: string | null
  paymentMethod?: "Cash" | "Bank" | null
  bankRefNo?: string | null
  isApproved?: boolean | null
}

/** GET client/subscriptions/{id}/payments. */
export interface SubscriptionPaymentsResult {
  invoiceId?: string | null
  invoiceAmount: number
  paidAmount: number
  balance: number
  status: PaymentStatus
  installments: SubscriptionInstallment[]
  payments: SubscriptionPayment[]
}

export interface RecordPaymentInput {
  amount: number
  note?: string
  paymentMethod: "Cash" | "Bank"
  /** Reference/slip number — only meaningful (and sent) when paymentMethod is "Bank". */
  bankRefNo?: string
}

export type ExtraFeeFrequency = "OneTime" | "Recurring"

/** Mirrors CustomerSubItemDto — an optional extra fee on a subscription (e.g. coaching fee). */
export interface SubscriptionExtraFee {
  customerSubItemId: string
  subItemName?: string | null
  subItemDescription?: string | null
  subItemPrice: number
  frequency: ExtraFeeFrequency
  isActive: boolean
  createdAt: string
}

export interface AddExtraFeeInput {
  name: string
  description?: string
  amount: number
  frequency: ExtraFeeFrequency
}