package payment

import (
	"context"
	"strings"
	"time"

	sdkalipay "github.com/smartwalle/alipay/v3"

	agentrecharge "github.com/break/junhong_cmp_fiber/internal/application/agentrecharge"
	"github.com/break/junhong_cmp_fiber/internal/infrastructure/integrationlog"
	"github.com/break/junhong_cmp_fiber/internal/model"
	alipaypkg "github.com/break/junhong_cmp_fiber/pkg/alipay"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	apperrors "github.com/break/junhong_cmp_fiber/pkg/errors"
)

// AlipayPreCreateAdapter 使用现有 smartwalle/alipay 实现当面付预下单与查单。
type AlipayPreCreateAdapter struct {
	integration *integrationlog.Repository
}

// NewAlipayPreCreateAdapter 创建支付宝当面付适配器。
func NewAlipayPreCreateAdapter(integration *integrationlog.Repository) *AlipayPreCreateAdapter {
	return &AlipayPreCreateAdapter{integration: integration}
}

// Available 判断配置是否完整支持支付宝预下单、验签与查单。
func (a *AlipayPreCreateAdapter) Available(config *model.WechatConfig) bool {
	return alipayConfigComplete(config, true)
}

// PreCreate 创建支付宝当面付扫码订单。
func (a *AlipayPreCreateAdapter) PreCreate(ctx context.Context, request agentrecharge.OnlinePaymentRequest) (agentrecharge.OnlinePaymentResult, error) {
	client, err := a.client(request.Config)
	if err != nil {
		return agentrecharge.OnlinePaymentResult{}, err
	}
	attempt, err := a.startAttempt(ctx, request.PaymentNo, constants.IntegrationOperationPaymentPreCreate, request.Config.ID, request.Amount)
	if err != nil {
		return agentrecharge.OnlinePaymentResult{}, err
	}
	startedAt := time.Now()
	response, callErr := client.TradePreCreate(ctx, sdkalipay.TradePreCreate{Trade: sdkalipay.Trade{
		NotifyURL: request.Config.AliNotifyURL, Subject: request.Description, OutTradeNo: request.PaymentNo,
		TotalAmount: alipaypkg.FenToYuan(request.Amount), ProductCode: "FACE_TO_FACE_PAYMENT",
		TimeExpire: request.ExpireAt.Format("2006-01-02 15:04:05"),
	}})
	if callErr != nil {
		return agentrecharge.OnlinePaymentResult{}, a.completeUnknown(ctx, attempt.IntegrationID, startedAt, callErr)
	}
	if response == nil || response.IsFailure() || strings.TrimSpace(response.QRCode) == "" {
		providerCode, providerMessage := "empty_qr_code", "支付宝预下单未返回付款内容"
		responseSummary := map[string]any{"success": false}
		if response != nil && response.IsFailure() {
			providerCode, providerMessage = string(response.Code), response.SubMsg
			if response.SubCode != "" {
				providerCode += ":" + response.SubCode
				responseSummary["sub_code"] = response.SubCode
			}
		}
		_, completeErr := a.integration.Complete(ctx, attempt.IntegrationID, integrationlog.Completion{
			Result: constants.IntegrationResultFailed, ProviderCode: providerCode, ProviderMessage: providerMessage,
			ResponseSummary: responseSummary, DurationMS: time.Since(startedAt).Milliseconds(),
		})
		if completeErr != nil {
			return agentrecharge.OnlinePaymentResult{}, completeErr
		}
		return agentrecharge.OnlinePaymentResult{}, apperrors.New(apperrors.CodeServiceUnavailable, "支付宝预下单失败")
	}
	if _, err = a.integration.Complete(ctx, attempt.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultSuccess, ProviderCode: string(response.Code),
		ResponseSummary: map[string]any{"success": true}, DurationMS: time.Since(startedAt).Milliseconds(), StateChanged: true,
	}); err != nil {
		return agentrecharge.OnlinePaymentResult{}, err
	}
	return agentrecharge.OnlinePaymentResult{QRContent: response.QRCode}, nil
}

// Query 查询支付宝当面付订单状态。
func (a *AlipayPreCreateAdapter) Query(ctx context.Context, paymentNo string, config *model.WechatConfig) (agentrecharge.OnlinePaymentQueryResult, error) {
	client, err := a.queryClient(config)
	if err != nil {
		return agentrecharge.OnlinePaymentQueryResult{}, err
	}
	attempt, err := a.startAttempt(ctx, paymentNo, constants.IntegrationOperationPaymentQuery, config.ID, 0)
	if err != nil {
		return agentrecharge.OnlinePaymentQueryResult{}, err
	}
	startedAt := time.Now()
	response, callErr := client.TradeQuery(ctx, sdkalipay.TradeQuery{OutTradeNo: paymentNo})
	if callErr != nil {
		return agentrecharge.OnlinePaymentQueryResult{}, a.completeUnknown(ctx, attempt.IntegrationID, startedAt, callErr)
	}
	if response == nil || response.IsFailure() {
		providerCode, providerMessage := "empty_response", "支付宝查单未返回有效响应"
		if response != nil {
			providerCode, providerMessage = string(response.Code), response.SubMsg
		}
		_, completeErr := a.integration.Complete(ctx, attempt.IntegrationID, integrationlog.Completion{
			Result: constants.IntegrationResultFailed, ProviderCode: providerCode, ProviderMessage: providerMessage,
			ResponseSummary: map[string]any{"success": false}, DurationMS: time.Since(startedAt).Milliseconds(),
		})
		if completeErr != nil {
			return agentrecharge.OnlinePaymentQueryResult{}, completeErr
		}
		return agentrecharge.OnlinePaymentQueryResult{}, apperrors.New(apperrors.CodeServiceUnavailable, "支付宝查单失败")
	}
	result := agentrecharge.OnlinePaymentQueryResult{
		State: mapAlipayTradeState(response.TradeStatus), ThirdPartyTradeNo: response.TradeNo,
	}
	result.Amount, _ = alipaypkg.YuanToFen(response.TotalAmount)
	if paidAt, parseErr := time.ParseInLocation("2006-01-02 15:04:05", response.SendPayDate, time.Local); parseErr == nil {
		result.PaidAt = &paidAt
	}
	if _, err = a.integration.Complete(ctx, attempt.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultSuccess, ProviderCode: string(response.TradeStatus),
		ResponseSummary: map[string]any{"state": result.State, "has_trade_no": result.ThirdPartyTradeNo != ""},
		DurationMS:      time.Since(startedAt).Milliseconds(),
	}); err != nil {
		return agentrecharge.OnlinePaymentQueryResult{}, err
	}
	return result, nil
}

func (a *AlipayPreCreateAdapter) client(config *model.WechatConfig) (*sdkalipay.Client, error) {
	if !a.Available(config) {
		return nil, apperrors.New(apperrors.CodeNoPaymentConfig, "支付宝扫码支付配置不可用")
	}
	return alipaypkg.NewClientFromConfig(config)
}

func (a *AlipayPreCreateAdapter) queryClient(config *model.WechatConfig) (*sdkalipay.Client, error) {
	if !alipayConfigComplete(config, false) {
		return nil, apperrors.New(apperrors.CodeNoPaymentConfig, "支付宝查单配置不可用")
	}
	return alipaypkg.NewClientFromConfig(config)
}

func alipayConfigComplete(config *model.WechatConfig, requireActive bool) bool {
	return config != nil && (!requireActive || config.IsActive) && config.AliAppID != "" && config.AliPrivateKey != "" &&
		config.AliPublicKey != "" && config.AliNotifyURL != ""
}

func (a *AlipayPreCreateAdapter) startAttempt(ctx context.Context, paymentNo, operation string, configID uint, amount int64) (*model.IntegrationLog, error) {
	resourceID := paymentNo
	return a.integration.Start(ctx, integrationlog.Attempt{
		Provider: constants.IntegrationProviderAlipay, Direction: constants.IntegrationDirectionOutbound,
		Operation: operation, ResourceType: constants.IntegrationResourceTypeAgentRechargePayment,
		ResourceID: &resourceID, ExternalID: &resourceID,
		RequestSummary: map[string]any{"payment_config_id": configID, "amount": amount},
	})
}

func (a *AlipayPreCreateAdapter) completeUnknown(ctx context.Context, integrationID string, startedAt time.Time, cause error) error {
	_, err := a.integration.Complete(ctx, integrationID, integrationlog.Completion{
		Result: constants.IntegrationResultUnknown, ProviderCode: "request_unknown", ProviderMessage: cause.Error(),
		ResponseSummary: map[string]any{"success": false}, DurationMS: time.Since(startedAt).Milliseconds(),
		RecoveryStrategy: "使用原支付单号主动查单，确认不存在或关闭后才允许关闭本地支付单",
	})
	if err != nil {
		return err
	}
	return apperrors.Wrap(apperrors.CodeTimeout, cause, "支付宝支付请求结果未知")
}

func mapAlipayTradeState(state sdkalipay.TradeStatus) string {
	switch state {
	case sdkalipay.TradeStatusSuccess, sdkalipay.TradeStatusFinished:
		return agentrecharge.OnlinePaymentStatePaid
	case sdkalipay.TradeStatusClosed:
		return agentrecharge.OnlinePaymentStateClosed
	case sdkalipay.TradeStatusWaitBuyerPay:
		return agentrecharge.OnlinePaymentStatePending
	default:
		return agentrecharge.OnlinePaymentStateUnknown
	}
}