package models

import (
	"time"

	"github.com/google/uuid"
)

// WalletExchangePreview is GET /customer/wallet/exchange/preview
// (docs/prd-point-coin.md F4): the rate, and what exchanging Coins would give.
type WalletExchangePreview struct {
	// The rate: CoinAmount EnakCoin exchange into PointAmount EnakPoint.
	CoinAmount  int64 `json:"coin_amount"`
	PointAmount int64 `json:"point_amount"`
	CoinBalance int64 `json:"coin_balance"`
	Coins       int64 `json:"coins"`
	Points      int64 `json:"points"`
	// Whether Coins can be exchanged now, and why not when it cannot.
	Valid  bool   `json:"valid"`
	Reason string `json:"reason,omitempty"`
}

// WalletMovedLot is part of what an exchange or a transfer delivered, with the
// expiry it carried over from the lot it came from (K9).
type WalletMovedLot struct {
	Amount int64 `json:"amount"`
	// Nil when it never expires.
	ExpiresAt *time.Time `json:"expires_at"`
}

// WalletExchangeResult is POST /customer/wallet/exchange.
type WalletExchangeResult struct {
	GroupID     uuid.UUID `json:"group_id"`
	Coins       int64     `json:"coins"`
	Points      int64     `json:"points"`
	CoinAmount  int64     `json:"coin_amount"`
	PointAmount int64     `json:"point_amount"`
	// The EnakPoint received, split by expiry.
	Lots         []WalletMovedLot `json:"lots"`
	CoinBalance  int64            `json:"coin_balance"`
	PointBalance int64            `json:"point_balance"`
	// True when this was a retry of an exchange already made; nothing moved again.
	Replayed bool `json:"replayed"`
}