package payment

import (
	"context"
	"errors"
	"strings"

	"kra/internal/biz"

	"github.com/go-pay/gopay"
	"github.com/go-pay/gopay/allinpay"
)

type allinpayAdapter struct{}

func (a *allinpayAdapter) client(c map[string]any) (*allinpay.Client, error) {
	client, err := allinpay.NewClient(text(c, "cus_id"), text(c, "app_id"), text(c, "private_key"), text(c, "public_key"), !strings.EqualFold(text(c, "environment"), "sandbox"))
	if err != nil {
		return nil, err
	}
	if org := text(c, "org_id"); org != "" {
		client.SetOrgId(org)
	}
	return client, nil
}

func (a *allinpayAdapter) Create(ctx context.Context, req *biz.PaymentRequest, c map[string]any) (*biz.PaymentResult, error) {
	client, err := a.client(c)
	if err != nil {
		return nil, err
	}
	bm := gopay.BodyMap{"reqsn": req.TradeNo, "trxamt": req.Amount, "body": req.Subject}
	mergeGoPayExtras(bm, req.Extra, "reqsn", "trxamt", "body", "method", "pay_method", "trade_type")
	method := strings.ToLower(firstAny(req.Extra, "method", "pay_method", "trade_type"))
	if method == "scan" || method == "micropay" || method == "barcode" {
		bm.Set("authcode", firstAny(req.Extra, "authcode", "auth_code"))
		bm.SetBodyMap("terminfo", func(info gopay.BodyMap) {
			info.Set("devicetype", firstAnyOr(req.Extra, "10", "device_type", "devicetype"))
			info.Set("termno", firstAnyOr(req.Extra, "00000001", "termno", "terminal_no"))
		})
		rsp, callErr := client.ScanPay(ctx, bm)
		if callErr != nil {
			return nil, callErr
		}
		if rsp == nil {
			return nil, errors.New("通联支付扫码下单响应为空")
		}
		return &biz.PaymentResult{Provider: biz.PaymentAllinPay, Status: normalizeAllinState(rsp.TrxStatus), TradeNo: req.TradeNo, ProviderTradeNo: rsp.Trxid, Payload: mustJSON(rsp)}, nil
	}
	if method == "native" || method == "qrcode" {
		bm.Set("expiretime", firstAny(req.Extra, "expiretime", "expire_time"))
		rsp, callErr := client.NativePay(ctx, bm)
		if callErr != nil {
			return nil, callErr
		}
		if rsp == nil {
			return nil, errors.New("通联支付下单响应为空")
		}
		return &biz.PaymentResult{Provider: biz.PaymentAllinPay, Status: "created", TradeNo: req.TradeNo, ProviderTradeNo: rsp.ReqSn, QueryID: rsp.PayInfo, Payload: mustJSON(rsp)}, nil
	}
	payType := firstAny(req.Extra, "paytype", "pay_type")
	if payType == "" {
		payType = firstAny(c, "paytype", "pay_type")
	}
	if payType == "" {
		payType = allinpay.PayTypeWXJS
	}
	bm.Set("paytype", payType)
	rsp, err := client.Pay(ctx, bm)
	if err != nil {
		return nil, err
	}
	if rsp == nil {
		return nil, errors.New("通联支付下单响应为空")
	}
	return &biz.PaymentResult{Provider: biz.PaymentAllinPay, Status: "created", TradeNo: req.TradeNo, ProviderTradeNo: rsp.Trxid, QueryID: rsp.PayInfo, Payload: mustJSON(rsp)}, nil
}

func (a *allinpayAdapter) Query(ctx context.Context, tradeNo string, c map[string]any) (*biz.PaymentResult, error) {
	client, err := a.client(c)
	if err != nil {
		return nil, err
	}
	orderType := firstAny(c, "query_order_type", "order_type")
	if orderType == "" {
		orderType = allinpay.OrderTypeReqSN
	}
	rsp, err := client.Query(ctx, orderType, tradeNo)
	if err != nil {
		return nil, err
	}
	if rsp == nil {
		return nil, errors.New("通联支付查单响应为空")
	}
	result := &biz.PaymentResult{Provider: biz.PaymentAllinPay, Status: normalizeAllinState(rsp.TrxStatus), TradeNo: rsp.Reqsn, ProviderTradeNo: rsp.Trxid, Currency: strings.ToUpper(firstAny(c, "currency")), Payload: mustJSON(rsp)}
	if result.TradeNo == "" {
		result.TradeNo = tradeNo
	}
	if rsp.TrxAmt != "" {
		result.Amount, err = parseIntegerAmount(rsp.TrxAmt)
		if err != nil {
			if scale := configuredInt64(c, "amount_scale", 100); scale != 1 {
				result.Amount, err = parseDecimalAmount(rsp.TrxAmt, scale)
			}
		}
	}
	if result.Currency == "" {
		result.Currency = "CNY"
	}
	return result, err
}

func (a *allinpayAdapter) Refund(ctx context.Context, req *biz.PaymentRefundRequest, c map[string]any) (*biz.PaymentResult, error) {
	if req == nil {
		return nil, errors.New("通联支付退款请求为空")
	}
	client, err := a.client(c)
	if err != nil {
		return nil, err
	}
	bm := gopay.BodyMap{"reqsn": req.RefundNo, "trxamt": req.Amount, "oldreqsn": req.TradeNo, "remark": firstAny(c, "refund_remark", "remark")}
	mergeGoPayConfigExtras(bm, c, "refund_extra", "reqsn", "trxamt", "oldreqsn", "remark")
	rsp, err := client.Refund(ctx, bm)
	if err != nil {
		return nil, err
	}
	if rsp == nil {
		return nil, errors.New("通联支付退款响应为空")
	}
	refundAmount, _ := parseIntegerAmount(rsp.Fee)
	if refundAmount == 0 {
		refundAmount = req.Amount
	}
	return &biz.PaymentResult{Provider: biz.PaymentAllinPay, Status: normalizeRefundState(rsp.TrxStatus), TradeNo: req.TradeNo, ProviderTradeNo: rsp.Trxid, Amount: refundAmount, Currency: strings.ToUpper(firstAny(c, "currency")), Payload: mustJSON(rsp)}, nil
}

func (a *allinpayAdapter) Callback(_ context.Context, _ *biz.PaymentCallback, _ map[string]any) (*biz.PaymentResult, error) {
	return nil, errors.New("通联支付回调没有可复用的 GoPay 验签器，请改用主动查单")
}