package account

import (
	"bygdata/global"
	"bygdata/model/awssqs"
	"context"
	"encoding/json"
	"fmt"
	"runtime/debug"
	"sync"
	"time"

	devtodev "devtodev-sdk"

	"github.com/shopspring/decimal"
	"go.uber.org/zap"
)

var (
	devToDevOnce          sync.Once
	devToDevClient        *devtodev.Client
	devToDevSourceTypeSet map[int32]string
	currentBalanceLastAt  sync.Map
)

const (
	devToDevEventRegister              = "register"
	devToDevEventWithdraw              = "withdraw"
	devToDevWalletEventDeposit         = "deposit"
	devToDevWalletEventWithdraw        = "withdraw"
	devToDevWalletEventAccrual         = "currency_accrual"
	devToDevWalletEventSpent           = "currency_spent"
	devToDevWalletEventVirtualPayment  = "virtual_currency_payment"
	devToDevDefaultCurrency            = "USD"
	devToDevDefaultPlatform            = "web"
	devToDevDefaultBalanceMinIntervalS = int64(86400)
)

func ReportUserBehaviorEvent(ctx context.Context, action awssqs.SqsAction, req awssqs.SqsActionUserBehaviorContent) {
	defer recoverDevToDevPanic("user_behavior", req.Userno)

	reporter := newDevToDevReporter(req.Userno, req.GetDeviceID())
	if reporter == nil {
		logUserBehaviorReporterSkip(req)
		return
	}
	now := time.Now().UnixMilli()
	pkg := baseDevtodevPackage(reporter, req.Ip)
	switch action {
	case awssqs.SqsActionUserBehaviorRegister:
		deviceInfoEvent := devtodev.NewDeviceInfoEvent(now, buildDeviceInfoFields(req.Header))
		pkg.Append(deviceInfoEvent)
		parameters := map[string]interface{}{}
		if req.Phone != "" {
			parameters["phone"] = req.Phone
		}
		registerEvent := devtodev.NewCustomEvent(now, 1, devToDevEventRegister, parameters, buildCommonFields(action, "", ""))
		pkg.Append(registerEvent)
		if _, err := pkg.Report(ctx); err != nil {
			logDevToDevError("register_bundle", req.Userno, err)
		}
	case awssqs.SqsActionUserBehaviorLogin:
		sessionStartEvent := devtodev.NewSessionStartEvent(now, 1, buildCommonFields(action, "", ""))
		pkg.Append(sessionStartEvent)
		if _, err := pkg.Report(ctx); err != nil {
			logDevToDevError("login_bundle", req.Userno, err)
		}
	}
}

func ReportWalletBalanceChangeEvent(ctx context.Context, req awssqs.SqsActionWalletBalanceChangeContent) {
	defer recoverDevToDevPanic("wallet_balance_change", req.Userno)

	reporter := newDevToDevReporter(req.Userno, req.GetDeviceID())
	if reporter == nil {
		logDevToDevSkip("wallet_balance_change", req.Userno, "reporter unavailable: missing app-id/userno/deviceId")
		return
	}

	now := time.Now().UnixMilli()
	amount, err := decimal.NewFromString(req.Amount)
	if err != nil {
		logDevToDevError("parse_amount", req.Userno, err)
		return
	}
	pkg := baseDevtodevPackage(reporter, "")

	if shouldReportCurrentBalance(req.Userno) {
		if balance, ok := parseDecimalFloat(req.AfterBalance); ok {
			balanceEvent := devtodev.NewCurrentBalanceEvent(now, 1, map[string]float64{defaultCurrency(): balance}, buildCommonFields(awssqs.SqsActionWalletBalanceChange, req.SourceId, req.RecordNo))
			pkg.Append(balanceEvent)
		} else {
			logDevToDevSkip("current_balance", req.Userno, fmt.Sprintf("invalid afterBalance: %q", req.AfterBalance))
		}
	}

	matchedEvent := false
	switch walletSourceTypeKind(req.SourceType) {
	case devToDevWalletEventDeposit:
		matchedEvent = true
		price, ok := decimalAbsFloat(amount)
		if !ok {
			logDevToDevSkip("real_currency_payment", req.Userno, fmt.Sprintf("invalid amount: %q", req.Amount))
			return
		}
		paymentEvent := devtodev.NewRealPaymentEvent(now, 1, resolveProductID(req), req.SourceId, price, defaultCurrency(), buildCommonFields(awssqs.SqsActionWalletBalanceChange, req.SourceId, req.RecordNo))
		pkg.Append(paymentEvent)
	case devToDevWalletEventWithdraw:
		matchedEvent = true
		value, ok := decimalAbsFloat(amount)
		if !ok {
			logDevToDevSkip("withdraw", req.Userno, fmt.Sprintf("invalid amount: %q", req.Amount))
			return
		}
		withdrawEvent := devtodev.NewCustomEvent(now, 1, devToDevEventWithdraw, map[string]interface{}{
			"amount":   value,
			"sourceId": req.SourceId,
			"recordNo": req.RecordNo,
		}, buildCommonFields(awssqs.SqsActionWalletBalanceChange, req.SourceId, req.RecordNo))
		pkg.Append(withdrawEvent)
	case devToDevWalletEventAccrual:
		matchedEvent = true
		value, ok := decimalAbsFloat(amount)
		if !ok {
			logDevToDevSkip("currency_accrual", req.Userno, fmt.Sprintf("invalid amount: %q", req.Amount))
			return
		}
		accrualEvent := devtodev.NewCurrencyAccrualEvent(now, 1, nil, map[string]map[string]float64{
			"default": {defaultCurrency(): value},
		}, buildCommonFields(awssqs.SqsActionWalletBalanceChange, req.SourceId, req.RecordNo))
		pkg.Append(accrualEvent)
	case devToDevWalletEventVirtualPayment:
		matchedEvent = true
		value, ok := decimalAbsFloat(amount)
		if !ok {
			logDevToDevSkip("virtual_currency_payment", req.Userno, fmt.Sprintf("invalid amount: %q", req.Amount))
			return
		}
		virtualPaymentEvent := devtodev.NewVirtualCurrencyPaymentEvent(now, 1, 1, map[string]float64{defaultCurrency(): value}, "wallet_source_type", fmt.Sprintf("%d", req.SourceType), buildCommonFields(awssqs.SqsActionWalletBalanceChange, req.SourceId, req.RecordNo))
		pkg.Append(virtualPaymentEvent)
	case devToDevWalletEventSpent:
		matchedEvent = true
		value, ok := decimalAbsFloat(amount)
		if !ok {
			logDevToDevSkip("currency_spent", req.Userno, fmt.Sprintf("invalid amount: %q", req.Amount))
			return
		}
		spentEvent := devtodev.NewCustomEvent(now, 1, devToDevWalletEventSpent, map[string]interface{}{
			"amount":     value,
			"sourceId":   req.SourceId,
			"recordNo":   req.RecordNo,
			"gameId":     req.GameId,
			"sourceType": req.SourceType,
		}, buildCommonFields(awssqs.SqsActionWalletBalanceChange, req.SourceId, req.RecordNo))
		pkg.Append(spentEvent)
	}

	if !matchedEvent {
		logDevToDevSkip("wallet_balance_change", req.Userno, fmt.Sprintf("no sourceType mapping for sourceType=%d", req.SourceType))
	}

	if len(pkg.Events()) == 0 {
		logDevToDevSkip("wallet_balance_change", req.Userno, "no valid events to report")
		return
	}
	if _, err := pkg.Report(ctx); err != nil {
		logDevToDevError("wallet_bundle", req.Userno, err)
	}
}

func newDevToDevReporter(userno, deviceID string) *devtodev.Reporter {
	client := getDevToDevClient()
	if client == nil || userno == "" || deviceID == "" {
		return nil
	}
	reporter := devtodev.NewReporter(client, deviceID)
	reporter.UserID = userno
	return reporter
}

func baseDevtodevPackage(reporter *devtodev.Reporter, ip string) *devtodev.DevtodevPackage {
	return reporter.NewPackage().
		WithPlatform(defaultPlatform()).
		WithIP(ip).
		WithAppVersion(global.GVA_CONFIG.DevToDev.AppVersion).
		WithBundle(global.GVA_CONFIG.DevToDev.Bundle)
}

func getDevToDevClient() *devtodev.Client {
	devToDevOnce.Do(func() {
		cfg := global.GVA_CONFIG.DevToDev
		if cfg.AppID == "" {
			return
		}
		client := devtodev.NewClient(cfg.AppID)
		devToDevClient = client
		devToDevSourceTypeSet = make(map[int32]string)
		registerSourceTypes(devToDevWalletEventDeposit, cfg.DepositSourceTypes)
		registerSourceTypes(devToDevWalletEventWithdraw, cfg.WithdrawSourceTypes)
		registerSourceTypes(devToDevWalletEventAccrual, cfg.CurrencyAccrualSourceTypes)
		registerSourceTypes(devToDevWalletEventSpent, cfg.VirtualCurrencySpentSourceTypes)
		registerSourceTypes(devToDevWalletEventVirtualPayment, cfg.VirtualCurrencyPaymentSourceTypes)
	})
	return devToDevClient
}

func registerSourceTypes(kind string, values []int32) {
	for _, value := range values {
		devToDevSourceTypeSet[value] = kind
	}
}

func walletSourceTypeKind(sourceType int32) string {
	if len(devToDevSourceTypeSet) == 0 {
		return ""
	}
	return devToDevSourceTypeSet[sourceType]
}

func shouldReportCurrentBalance(userno string) bool {
	interval := global.GVA_CONFIG.DevToDev.CurrentBalanceMinIntervalSeconds
	if interval <= 0 {
		interval = devToDevDefaultBalanceMinIntervalS
	}
	now := time.Now().Unix()
	if value, ok := currentBalanceLastAt.Load(userno); ok {
		lastAt, ok := value.(int64)
		if ok && now-lastAt < interval {
			return false
		}
	}
	currentBalanceLastAt.Store(userno, now)
	return true
}

func buildDeviceInfoFields(header string) map[string]interface{} {
	if header == "" {
		return nil
	}
	var values map[string]interface{}
	if err := json.Unmarshal([]byte(header), &values); err == nil && len(values) > 0 {
		return map[string]interface{}{"header": values}
	}
	return map[string]interface{}{"header_raw": header}
}

func buildCommonFields(action awssqs.SqsAction, sourceID, recordNo string) map[string]interface{} {
	fields := map[string]interface{}{
		"sqsAction": action.GetName(),
	}
	if sourceID != "" {
		fields["sourceId"] = sourceID
	}
	if recordNo != "" {
		fields["recordNo"] = recordNo
	}
	return fields
}

func resolveProductID(req awssqs.SqsActionWalletBalanceChangeContent) string {
	if req.GameId != "" {
		return req.GameId
	}
	if req.SourceId != "" {
		return req.SourceId
	}
	return fmt.Sprintf("wallet_source_type_%d", req.SourceType)
}

func defaultCurrency() string {
	if global.GVA_CONFIG.DevToDev.DefaultCurrency != "" {
		return global.GVA_CONFIG.DevToDev.DefaultCurrency
	}
	return devToDevDefaultCurrency
}

func defaultPlatform() string {
	if global.GVA_CONFIG.DevToDev.Platform != "" {
		return global.GVA_CONFIG.DevToDev.Platform
	}
	return devToDevDefaultPlatform
}

func parseDecimalFloat(value string) (float64, bool) {
	parsed, err := decimal.NewFromString(value)
	if err != nil {
		return 0, false
	}
	floatValue, _ := parsed.Float64()
	return floatValue, true
}

func decimalAbsFloat(value decimal.Decimal) (float64, bool) {
	floatValue, _ := value.Abs().Float64()
	return floatValue, true
}

func logDevToDevError(eventName, userno string, err error) {
	global.GVA_LOG.Warn("devtodev report failed", zap.String("event", eventName), zap.String("userno", userno), zap.Error(err))
}

func logDevToDevSkip(scene, userno, reason string) {
	global.GVA_LOG.Warn("devtodev report skipped", zap.String("scene", scene), zap.String("userno", userno), zap.String("reason", reason))
}

func logUserBehaviorReporterSkip(req awssqs.SqsActionUserBehaviorContent) {
	switch {
	case global.GVA_CONFIG.DevToDev.AppID == "":
		logDevToDevSkip("user_behavior", req.Userno, "reporter unavailable: missing app-id")
	case req.Userno == "":
		logDevToDevSkip("user_behavior", req.Userno, "reporter unavailable: missing userno")
	case req.Header == "":
		global.GVA_LOG.Warn(
			"devtodev report skipped",
			zap.String("scene", "user_behavior"),
			zap.String("userno", req.Userno),
			zap.String("reason", "reporter unavailable: missing deviceId, header is empty"),
			zap.Strings("deviceIdCandidateKeys", deviceIDCandidateKeys()),
		)
	default:
		global.GVA_LOG.Warn(
			"devtodev report skipped",
			zap.String("scene", "user_behavior"),
			zap.String("userno", req.Userno),
			zap.String("reason", "reporter unavailable: missing deviceId in header"),
			zap.Strings("deviceIdCandidateKeys", deviceIDCandidateKeys()),
			zap.String("headerPreview", truncateForLog(req.Header, 512)),
		)
	}
}

func deviceIDCandidateKeys() []string {
	return []string{"deviceId", "deviceID", "device_id", "device-id", "x-device-id", "X-Device-Id", "X-DEVICE-ID"}
}

func truncateForLog(value string, max int) string {
	if max <= 0 || len(value) <= max {
		return value
	}
	return value[:max] + "...(truncated)"
}

func recoverDevToDevPanic(scene, userno string) {
	if r := recover(); r != nil {
		global.GVA_LOG.Error(
			"devtodev report panic recovered",
			zap.String("scene", scene),
			zap.String("userno", userno),
			zap.Any("panic", r),
			zap.ByteString("stack", debug.Stack()),
		)
	}
}