package ledger

const (
	// AssetCoin 是用户送礼消费资产。
	AssetCoin = "COIN"
	// AssetCoinSellerCoin 是币商专用金币资产，只能通过币商转账兑换成玩家普通 COIN。
	AssetCoinSellerCoin = "COIN_SELLER_COIN"
	// AssetGiftPoint 是主播礼物积分，不能直接消费或提现。
	AssetGiftPoint = "GIFT_POINT"
	// AssetDiamond 是后续兑换用资产，当前只在余额模型中保留。
	AssetDiamond = "DIAMOND"
	// AssetUSDBalance 是主播可提现美元余额，单位由后续提现策略固定。
	AssetUSDBalance = "USD_BALANCE"
)

// DebitGiftCommand 是 room-service 送礼扣费的账务命令。
type DebitGiftCommand struct {
	AppCode      string
	CommandID    string
	RoomID       string
	SenderUserID int64
	TargetUserID int64
	GiftID       string
	GiftCount    int32
	PriceVersion string
	RegionID     int64
}

// Receipt 是账务命令落账后的稳定回执。
type Receipt struct {
	BillingReceiptID string
	TransactionID    string
	CoinSpent        int64
	GiftPointAdded   int64
	HeatValue        int64
	PriceVersion     string
	BalanceAfter     int64
}

// CoinSellerTransferCommand 是币商给玩家转普通金币的账务命令。
type CoinSellerTransferCommand struct {
	AppCode        string
	CommandID      string
	SellerUserID   int64
	TargetUserID   int64
	SellerRegionID int64
	TargetRegionID int64
	Amount         int64
	Reason         string
}

// CoinSellerTransferReceipt 是币商转账完成后的稳定回执。
type CoinSellerTransferReceipt struct {
	TransactionID              string
	SellerBalanceAfter         int64
	TargetBalanceAfter         int64
	Amount                     int64
	RechargeUSDMinor           int64
	RechargeCurrencyCode       string
	RechargePolicyID           int64
	RechargePolicyVersion      string
	RechargePolicyCoinAmount   int64
	RechargePolicyUSDMinorUnit int64
}

// AssetBalance 是账户当前可用/冻结余额投影。
type AssetBalance struct {
	AppCode         string
	UserID          int64
	AssetType       string
	AvailableAmount int64
	FrozenAmount    int64
	Version         int64
	UpdatedAtMs     int64
}

// AdminCreditAssetCommand 是后台手动入账的最小审计命令。
type AdminCreditAssetCommand struct {
	AppCode        string
	CommandID      string
	TargetUserID   int64
	AssetType      string
	Amount         int64
	OperatorUserID int64
	Reason         string
	EvidenceRef    string
}

// ValidAssetType 限定账本允许落账的资产类型，避免写入任意字符串资产。
func ValidAssetType(assetType string) bool {
	switch assetType {
	case AssetCoin, AssetCoinSellerCoin, AssetGiftPoint, AssetDiamond, AssetUSDBalance:
		return true
	default:
		return false
	}
}