package constants

const (
	// RefundMethodOriginalRoute 表示按原支付渠道原路退款。
	RefundMethodOriginalRoute = "original_route"
	// RefundMethodCustomerAccount 表示退至客户提供的收款信息。
	RefundMethodCustomerAccount = "customer_account"
	// RefundMethodAssetWallet 表示退回原资产钱包。
	RefundMethodAssetWallet = "asset_wallet"
	// RefundMethodAgentWallet 表示退回原代理主钱包。
	RefundMethodAgentWallet = "agent_wallet"
)

// RefundMethodName 返回退款方式中文名称。
func RefundMethodName(method string) string {
	switch method {
	case RefundMethodOriginalRoute:
		return "原路退款"
	case RefundMethodCustomerAccount:
		return "客户收款信息退款"
	case RefundMethodAssetWallet:
		return "退回资产钱包"
	case RefundMethodAgentWallet:
		return "退回代理主钱包"
	default:
		return "未知方式"
	}
}

const (
	// RefundChannelStatusNone 表示未发起渠道退款或不适用该方式。
	RefundChannelStatusNone = 0
	// RefundChannelStatusProcessing 表示渠道退款已提交但结果未确认。
	RefundChannelStatusProcessing = 1
	// RefundChannelStatusSucceeded 表示渠道明确退款成功。
	RefundChannelStatusSucceeded = 2
	// RefundChannelStatusFailed 表示渠道明确退款失败。
	RefundChannelStatusFailed = 3
)

// RefundChannelStatusName 返回渠道退款状态中文名称。
func RefundChannelStatusName(status int) string {
	switch status {
	case RefundChannelStatusProcessing:
		return "处理中"
	case RefundChannelStatusSucceeded:
		return "已成功"
	case RefundChannelStatusFailed:
		return "已失败"
	default:
		return "未发起"
	}
}

// 退款结构化失败分类稳定编码。
// 分类既用于详情展示与审计，也用于后续佣金回溯判定「明确失败可回溯 / 在途不可回溯」。
const (
	// RefundFailureChannelRejected 表示渠道明确拒绝退款。
	RefundFailureChannelRejected = "channel_rejected"
	// RefundFailureCredentialInvalid 表示该商户退款必需凭证缺失或失效，渠道侧不可执行。
	RefundFailureCredentialInvalid = "credential_invalid"
	// RefundFailureInsufficientBalance 表示渠道账户余额不足。
	RefundFailureInsufficientBalance = "insufficient_balance"
	// RefundFailureTimeoutUnknown 表示调用超时或渠道结果未确认，属可恢复状态。
	RefundFailureTimeoutUnknown = "timeout_unknown"
	// RefundFailureApprovalRejected 表示企业微信驳回、撤销或删除。
	RefundFailureApprovalRejected = "approval_rejected"
	// RefundFailureRevokedAfterApproved 表示企业微信通过后撤销，属需人工处理的异常。
	RefundFailureRevokedAfterApproved = "revoked_after_approved"
	// RefundFailurePaymentFactInvalid 表示本地原支付单、实际收款商户、原渠道流水或可退金额校验不通过。
	RefundFailurePaymentFactInvalid = "payment_fact_invalid"
)

// RefundFailureReasonName 返回失败分类中文名称。
func RefundFailureReasonName(reason string) string {
	switch reason {
	case RefundFailureChannelRejected:
		return "渠道明确拒绝"
	case RefundFailureCredentialInvalid:
		return "渠道凭证失效"
	case RefundFailureInsufficientBalance:
		return "渠道余额不足"
	case RefundFailureTimeoutUnknown:
		return "超时或结果未知"
	case RefundFailureApprovalRejected:
		return "企业微信驳回或关闭"
	case RefundFailureRevokedAfterApproved:
		return "企业微信通过后撤销"
	case RefundFailurePaymentFactInvalid:
		return "本地原支付事实不可用"
	default:
		return "无失败"
	}
}

// RefundFailureReasonIsDefinitive 判断失败分类是否属于明确失败。
// 明确失败表示退款已终结且可进入后续回溯判定；超时未知与企业微信通过后撤销均非明确失败，
// 前者保持可恢复、后者转人工处理，都不得据此回溯佣金。
func RefundFailureReasonIsDefinitive(reason string) bool {
	switch reason {
	case RefundFailureChannelRejected,
		RefundFailureCredentialInvalid,
		RefundFailureInsufficientBalance,
		RefundFailureApprovalRejected,
		RefundFailurePaymentFactInvalid:
		return true
	default:
		return false
	}
}