package invoice

import (
	"errors"
	"time"

	"github.com/noderunners/nip05api/internal/user"
)

type PendingInvoice struct {
	PaymentHash      string
	PaymentRequest   string
	Username         string
	Pubkey           string
	SubscriptionType user.SubscriptionType
	Years            int
	AmountSats       int64
	ExpiresAt        time.Time
	Paid             bool
	IsRenewal        bool
	CreatedAt        time.Time
	// TargetExpiresAt captures the user's new expiry value at first
	// confirmation. Persisted so retries after a crash apply the same
	// absolute value and stay idempotent. nil for lifetime.
	TargetExpiresAt *time.Time
	// TargetSet is true when target_expires_at has been written (even if
	// the value is NULL for lifetime). Distinguishes "unset" from "lifetime".
	TargetSet bool
}

type Status string

const (
	StatusPending Status = "pending"
	StatusPaid    Status = "paid"
	StatusExpired Status = "expired"
)

var (
	ErrInvoiceNotFound = errors.New("invoice not found")
	ErrLNbits          = errors.New("lnbits error")
)

func (p *PendingInvoice) Status() Status {
	if p.Paid {
		return StatusPaid
	}
	if time.Now().UTC().After(p.ExpiresAt) {
		return StatusExpired
	}
	return StatusPending
}