package ledger

import "strings"

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
	ChargeAssetType  string
	ChargeAmount     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
}

// RechargeBill 是充值账单的只读投影；充值事实由 wallet_recharge_records 保存。
type RechargeBill struct {
	AppCode                string
	TransactionID          string
	CommandID              string
	RechargeType           string
	Status                 string
	ExternalRef            string
	UserID                 int64
	SellerUserID           int64
	SellerRegionID         int64
	TargetRegionID         int64
	PolicyID               int64
	PolicyVersion          string
	CurrencyCode           string
	CoinAmount             int64
	USDMinorAmount         int64
	ExchangeCoinAmount     int64
	ExchangeUSDMinorAmount int64
	CreatedAtMS            int64
}

// ListRechargeBillsQuery 是后台查询所有充值渠道账单的筛选条件。
type ListRechargeBillsQuery struct {
	AppCode      string
	UserID       int64
	SellerUserID int64
	RegionID     int64
	RechargeType string
	Status       string
	Keyword      string
	StartAtMS    int64
	EndAtMS      int64
	Page         int32
	PageSize     int32
}

// 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
	}
}

func NormalizeGiftChargeAssetType(assetType string) string {
	switch strings.ToUpper(strings.TrimSpace(assetType)) {
	case AssetDiamond:
		return AssetDiamond
	default:
		return AssetCoin
	}
}

func ValidGiftChargeAssetType(assetType string) bool {
	switch strings.ToUpper(strings.TrimSpace(assetType)) {
	case AssetCoin, AssetDiamond:
		return true
	default:
		return false
	}
}