package payment

import (
	"context"
	"strconv"
	"strings"
	"time"

	"go.uber.org/zap"

	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"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	apperrors "github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/fuiou"
)

// FuiouScanAdapter 按富友主扫统一下单生成微信扫码支付链接并主动查单。
type FuiouScanAdapter struct {
	integration *integrationlog.Repository
	logger      *zap.Logger
}

// NewFuiouScanAdapter 创建富友扫码支付适配器。
func NewFuiouScanAdapter(integration *integrationlog.Repository, logger *zap.Logger) *FuiouScanAdapter {
	return &FuiouScanAdapter{integration: integration, logger: logger}
}

// Available 判断富友主扫下单、验签与查单所需的配置是否完整。
func (a *FuiouScanAdapter) Available(config *model.WechatConfig) bool {
	return fuiouConfigComplete(config, true)
}

// CreatePaymentURL 调用富友主扫统一下单并返回二维码链接。
func (a *FuiouScanAdapter) CreatePaymentURL(ctx context.Context, request agentrecharge.OnlinePaymentRequest) (agentrecharge.OnlinePaymentResult, error) {
	attempt, err := a.startAttempt(ctx, request, constants.IntegrationOperationPaymentPreCreate, request.Config.ID, request.Amount)
	if err != nil {
		return agentrecharge.OnlinePaymentResult{}, err
	}
	startedAt := time.Now()
	client, err := a.newClient(request.Config)
	if err != nil {
		return agentrecharge.OnlinePaymentResult{}, a.completeUnknown(ctx, attempt.IntegrationID, startedAt, err)
	}
	expireMinutes := int(time.Until(request.ExpireAt).Minutes())
	if expireMinutes < 1 {
		expireMinutes = 1
	}
	resp, callErr := client.PreCreate(
		request.PaymentNo, strconv.FormatInt(request.Amount, 10), request.Description,
		fuiou.GetServerIP(), fuiou.OrderTypeWechat, strconv.Itoa(expireMinutes),
	)
	if callErr != nil {
		return agentrecharge.OnlinePaymentResult{}, a.completeUnknown(ctx, attempt.IntegrationID, startedAt, callErr)
	}
	if strings.TrimSpace(resp.QrCode) == "" {
		return agentrecharge.OnlinePaymentResult{}, a.completeFailed(ctx, attempt.IntegrationID, startedAt, "empty_qr_code", "富友主扫下单未返回二维码链接")
	}
	if _, err = a.integration.Complete(ctx, attempt.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultSuccess, ResponseSummary: map[string]any{"success": true},
		DurationMS: time.Since(startedAt).Milliseconds(), StateChanged: true,
	}); err != nil {
		return agentrecharge.OnlinePaymentResult{}, err
	}
	return agentrecharge.OnlinePaymentResult{QRContent: resp.QrCode}, nil
}

// Query 调用富友订单查询并按 trans_stat 返回统一查询结果。
func (a *FuiouScanAdapter) Query(ctx context.Context, request agentrecharge.OnlinePaymentRequest) (agentrecharge.OnlinePaymentQueryResult, error) {
	attempt, err := a.startAttempt(ctx, request, constants.IntegrationOperationPaymentQuery, request.Config.ID, 0)
	if err != nil {
		return agentrecharge.OnlinePaymentQueryResult{}, err
	}
	startedAt := time.Now()
	client, err := a.newClient(request.Config)
	if err != nil {
		return agentrecharge.OnlinePaymentQueryResult{}, a.completeUnknown(ctx, attempt.IntegrationID, startedAt, err)
	}
	resp, callErr := client.CommonQuery(request.PaymentNo, fuiou.OrderTypeWechat)
	if callErr != nil {
		return agentrecharge.OnlinePaymentQueryResult{}, a.completeUnknown(ctx, attempt.IntegrationID, startedAt, callErr)
	}
	result := agentrecharge.OnlinePaymentQueryResult{State: mapFuiouTransStat(resp.TransStat)}
	if result.State == agentrecharge.OnlinePaymentStatePaid {
		result.ThirdPartyTradeNo = strings.TrimSpace(resp.TransactionId)
		result.Amount, _ = strconv.ParseInt(strings.TrimSpace(resp.OrderAmt), 10, 64)
		if paidAt, ok := parseWechatPaidAt(strings.TrimSpace(resp.ReservedTxnFinTs)); ok {
			result.PaidAt = &paidAt
		}
	}
	providerCode := resp.TransStat
	if strings.TrimSpace(providerCode) == "" {
		providerCode = "unknown"
	}
	if _, err = a.integration.Complete(ctx, attempt.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultSuccess, ProviderCode: providerCode,
		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 fuiouConfigComplete(config *model.WechatConfig, requireActive bool) bool {
	return config != nil && (!requireActive || config.IsActive) && config.ProviderType == model.ProviderTypeFuiou &&
		config.FyInsCd != "" && config.FyMchntCd != "" && config.FyTermID != "" &&
		config.FyPrivateKey != "" && config.FyPublicKey != "" && config.FyAPIURL != "" && config.FyNotifyURL != ""
}

func (a *FuiouScanAdapter) newClient(config *model.WechatConfig) (*fuiou.Client, error) {
	if !fuiouConfigComplete(config, false) {
		return nil, apperrors.New(apperrors.CodeNoPaymentConfig, "富友扫码支付配置不可用")
	}
	return fuiou.NewClient(
		config.FyInsCd, config.FyMchntCd, config.FyTermID, config.FyAPIURL, config.FyNotifyURL,
		config.FyPrivateKey, config.FyPublicKey, a.logger,
	)
}

func mapFuiouTransStat(transStat string) string {
	switch transStat {
	case "SUCCESS":
		return agentrecharge.OnlinePaymentStatePaid
	case "PAYERROR", "CLOSED", "REVOKED":
		return agentrecharge.OnlinePaymentStateClosed
	case "USERPAYING", "NOTPAY":
		return agentrecharge.OnlinePaymentStatePending
	default:
		return agentrecharge.OnlinePaymentStateUnknown
	}
}

func (a *FuiouScanAdapter) startAttempt(ctx context.Context, request agentrecharge.OnlinePaymentRequest, operation string, configID uint, amount int64) (*model.IntegrationLog, error) {
	resourceID, resourceKey := strconv.FormatUint(uint64(request.PaymentID), 10), request.PaymentNo
	series := "agent-recharge-payment:" + resourceID + ":" + operation
	correlationID := request.CorrelationID
	return a.integration.Start(ctx, integrationlog.Attempt{
		Provider: constants.IntegrationProviderFuiou, Direction: constants.IntegrationDirectionOutbound,
		Operation: operation, ResourceType: constants.IntegrationResourceTypeAgentRechargePayment,
		ResourceID: &resourceID, ResourceKey: &resourceKey, ExternalID: &resourceKey,
		TriggerSeries: &series, CorrelationID: &correlationID,
		RequestSummary: map[string]any{"payment_config_id": configID, "amount": amount},
	})
}

func (a *FuiouScanAdapter) completeUnknown(ctx context.Context, integrationID string, startedAt time.Time, cause error) error {
	if a.logger != nil {
		a.logger.Warn("富友支付请求结果未知", zap.String("integration_id", integrationID), zap.Error(cause))
	}
	_, err := a.integration.Complete(ctx, integrationID, integrationlog.Completion{
		Result: constants.IntegrationResultUnknown, ProviderCode: "request_unknown", SafeProviderMessage: "富友支付请求结果未知",
		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, "富友支付请求结果未知")
}

func (a *FuiouScanAdapter) completeFailed(ctx context.Context, integrationID string, startedAt time.Time, providerCode, providerMessage string) error {
	_, err := a.integration.Complete(ctx, integrationID, integrationlog.Completion{
		Result: constants.IntegrationResultFailed, ProviderCode: providerCode, SafeProviderMessage: providerMessage,
		ResponseSummary: map[string]any{"success": false}, DurationMS: time.Since(startedAt).Milliseconds(),
	})
	if err != nil {
		return err
	}
	return apperrors.New(apperrors.CodeServiceUnavailable, providerMessage)
}