package iot_card

import (
	"context"
	"strconv"
	"time"

	"github.com/google/uuid"

	"github.com/break/junhong_cmp_fiber/internal/infrastructure/integrationlog"
	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/pkg/auditcontext"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	pkgerrors "github.com/break/junhong_cmp_fiber/pkg/errors"
)

type gatewayAttempt struct {
	log       *model.IntegrationLog
	startedAt time.Time
}

func (s *Service) startGatewayCardAttempt(ctx context.Context, card *model.IotCard, operation, scene, seriesKey string, attempt int) (*gatewayAttempt, error) {
	if s == nil || s.speedTierIntegration == nil {
		return nil, pkgerrors.New(pkgerrors.CodeInvalidStatus, "Gateway Integration Log 接缝未配置")
	}
	resourceID := strconv.FormatUint(uint64(card.ID), 10)
	triggerSource := auditcontext.From(ctx).Source
	if triggerSource == "" {
		triggerSource = "service"
	}
	triggerScene := scene
	triggerSeries := uuid.NewSHA1(uuid.NameSpaceOID, []byte("gateway-card:"+seriesKey+":"+operation)).String()
	requestID := requestIDFromContext(ctx)
	var requestIDPtr *string
	if requestID != "" {
		requestIDPtr = &requestID
	}
	log, err := s.speedTierIntegration.Start(ctx, integrationlog.Attempt{
		Provider: constants.IntegrationProviderGateway, Direction: constants.IntegrationDirectionOutbound,
		Operation: operation, ExternalID: &card.ICCID,
		ResourceType: constants.AssetTypeIotCard, ResourceID: &resourceID, ResourceKey: &card.ICCID,
		TriggerSource: &triggerSource, TriggerScene: &triggerScene, TriggerSeries: &triggerSeries,
		Attempt: attempt, RequestID: requestIDPtr, CorrelationID: requestIDPtr,
		RequestSummary: map[string]any{"iot_card_id": card.ID, "iccid": card.ICCID},
	})
	if err != nil {
		return nil, err
	}
	return &gatewayAttempt{log: log, startedAt: time.Now()}, nil
}

func (s *Service) completeGatewayCardAttempt(ctx context.Context, attempt *gatewayAttempt, callErr error, stateChanged bool) error {
	if attempt == nil || attempt.log == nil {
		return nil
	}
	completion := integrationlog.Completion{
		Result: constants.IntegrationResultSuccess, DurationMS: time.Since(attempt.startedAt).Milliseconds(),
		StateChanged: stateChanged, ResponseSummary: map[string]any{"result": "success"},
	}
	if callErr != nil {
		completion.Result = constants.IntegrationResultFailed
		completion.SafeProviderMessage = "Gateway 请求失败"
		completion.ResponseSummary = map[string]any{"result": "failed"}
		if isGatewayTimeout(callErr) {
			completion.Result = constants.IntegrationResultUnknown
			completion.SafeProviderMessage = "Gateway 请求结果未知"
			completion.ResponseSummary = map[string]any{"result": "unknown"}
			completion.RecoveryStrategy = constants.GatewayQueryUnknownRecoveryStrategy
		}
	}
	_, err := s.speedTierIntegration.Complete(ctx, attempt.log.IntegrationID, completion)
	return err
}

type gatewayCardAttemptObserver struct {
	service      *Service
	card         *model.IotCard
	operation    string
	scene        string
	seriesKey    string
	nextAttempt  int
	current      *gatewayAttempt
	successful   *gatewayAttempt
	lastCallErr  error
	recordingErr error
	unknown      bool
}

func (o *gatewayCardAttemptObserver) BeforeAttempt(ctx context.Context, _ int) error {
	o.nextAttempt++
	o.lastCallErr = nil
	attempt, err := o.service.startGatewayCardAttempt(ctx, o.card, o.operation, o.scene, o.seriesKey, o.nextAttempt)
	if err != nil {
		o.recordingErr = err
		return err
	}
	o.current = attempt
	return nil
}

func (o *gatewayCardAttemptObserver) AfterAttempt(ctx context.Context, _ int, callErr error) error {
	o.lastCallErr = callErr
	if isGatewayTimeout(callErr) {
		o.unknown = true
	}
	if callErr == nil {
		o.successful = o.current
		o.current = nil
		return nil
	}
	err := o.service.completeGatewayCardAttempt(ctx, o.current, callErr, false)
	o.current = nil
	if err != nil {
		o.recordingErr = err
	}
	return err
}