package service

import (
	"context"
	"encoding/json"
	"fmt"
	"strings"
	"time"

	"github.com/mhsanaei/3x-ui/v3/internal/database"
	"github.com/mhsanaei/3x-ui/v3/internal/database/model"
	"github.com/mhsanaei/3x-ui/v3/internal/logger"
	"github.com/mhsanaei/3x-ui/v3/internal/util/common"
	"github.com/mhsanaei/3x-ui/v3/internal/util/random"
	"github.com/mhsanaei/3x-ui/v3/internal/xray"
)

// delInboundClients removes several clients from a single inbound in one pass:
// one settings rewrite, one runtime sweep, one Save and one SyncInbound for the
// whole batch, instead of repeating the full per-client cycle. It mirrors the
// semantics of DelInboundClientByEmail for each removed client. needRestart is
// the OR across all removals.
func (s *ClientService) delInboundClients(inboundSvc *InboundService, inboundId int, recs []*model.ClientRecord, keepTraffic bool) (bool, error) {
	if len(recs) == 0 {
		return false, nil
	}
	defer lockInbound(inboundId).Unlock()

	oldInbound, err := inboundSvc.GetInbound(inboundId)
	if err != nil {
		logger.Error("Load Old Data Error")
		return false, err
	}

	var settings map[string]any
	if err := json.Unmarshal([]byte(oldInbound.Settings), &settings); err != nil {
		return false, err
	}

	// Match by email — the client's stable identity (see Delete). Removes every
	// entry carrying a wanted email, independent of credential drift.
	wanted := make(map[string]struct{}, len(recs))
	for _, rec := range recs {
		if rec.Email != "" {
			wanted[rec.Email] = struct{}{}
		}
	}

	interfaceClients, ok := settings["clients"].([]any)
	if !ok {
		return false, common.NewError("invalid clients format in inbound settings")
	}

	type removedClient struct {
		email      string
		needApiDel bool
	}
	removed := make([]removedClient, 0, len(wanted))
	newClients := make([]any, 0, len(interfaceClients))
	for _, client := range interfaceClients {
		c, ok := client.(map[string]any)
		if !ok {
			newClients = append(newClients, client)
			continue
		}
		email, _ := c["email"].(string)
		if _, hit := wanted[email]; hit && email != "" {
			enable, _ := c["enable"].(bool)
			removed = append(removed, removedClient{email: email, needApiDel: enable})
			continue
		}
		newClients = append(newClients, client)
	}

	if len(removed) == 0 {
		return false, nil
	}

	db := database.GetDB()
	newClients = compactOrphans(db, newClients)
	if newClients == nil {
		newClients = []any{}
	}
	settings["clients"] = newClients
	newSettings, err := json.MarshalIndent(settings, "", "  ")
	if err != nil {
		return false, err
	}
	oldInbound.Settings = string(newSettings)

	var sharedSet map[string]bool
	if !keepTraffic {
		removedEmails := make([]string, 0, len(removed))
		for _, r := range removed {
			if r.email != "" {
				removedEmails = append(removedEmails, r.email)
			}
		}
		var sharedErr error
		sharedSet, sharedErr = inboundSvc.emailsUsedByOtherInbounds(removedEmails, inboundId)
		if sharedErr != nil {
			return false, sharedErr
		}
	}

	needRestart := false
	markDirty := false
	for _, r := range removed {
		email := r.email
		emailShared := sharedSet[strings.ToLower(strings.TrimSpace(email))]
		if !emailShared && !keepTraffic {
			if err := inboundSvc.DelClientIPs(db, email); err != nil {
				logger.Error("Error in delete client IPs")
				return needRestart, err
			}
		}
		if len(email) > 0 {
			var enables []bool
			if err := db.Model(xray.ClientTraffic{}).Where("email = ?", email).Limit(1).Pluck("enable", &enables).Error; err != nil {
				logger.Error("Get stats error")
				return needRestart, err
			}
			notDepleted := len(enables) > 0 && enables[0]
			if !emailShared && !keepTraffic {
				if err := inboundSvc.DelClientStat(db, email); err != nil {
					logger.Error("Delete stats Data Error")
					return needRestart, err
				}
			}
			if r.needApiDel && notDepleted && oldInbound.NodeID == nil {
				rt, rterr := inboundSvc.runtimeFor(oldInbound)
				if rterr != nil {
					needRestart = true
				} else if err1 := rt.RemoveUser(context.Background(), oldInbound, email); err1 != nil {
					if !strings.Contains(err1.Error(), fmt.Sprintf("User %s not found.", email)) {
						needRestart = true
					}
				}
			}
		}
		if oldInbound.NodeID != nil && len(email) > 0 {
			rt, push, dirty, perr := inboundSvc.nodePushPlan(oldInbound)
			if perr != nil {
				return needRestart, perr
			}
			if dirty {
				markDirty = true
			}
			if push {
				if err1 := rt.DeleteUser(context.Background(), oldInbound, email); err1 != nil {
					logger.Warning("Error in deleting client on", rt.Name(), ":", err1)
					markDirty = true
				}
			}
		}
	}

	if err := db.Save(oldInbound).Error; err != nil {
		return needRestart, err
	}
	finalClients, gcErr := inboundSvc.GetClients(oldInbound)
	if gcErr != nil {
		return needRestart, gcErr
	}
	if err := s.SyncInbound(db, inboundId, finalClients); err != nil {
		return needRestart, err
	}
	if markDirty && oldInbound.NodeID != nil {
		if dErr := (&NodeService{}).MarkNodeDirty(*oldInbound.NodeID); dErr != nil {
			logger.Warning("mark node dirty failed:", dErr)
		}
	}
	return needRestart, nil
}

func (s *ClientService) checkEmailsExistForClients(inboundSvc *InboundService, clients []model.Client, emailSubIDs map[string]string) (string, error) {
	if emailSubIDs == nil {
		var err error
		emailSubIDs, err = inboundSvc.getAllEmailSubIDs()
		if err != nil {
			return "", err
		}
	}
	seen := make(map[string]string, len(clients))
	for _, client := range clients {
		if client.Email == "" {
			continue
		}
		key := strings.ToLower(client.Email)
		if prev, ok := seen[key]; ok {
			if prev != client.SubID || client.SubID == "" {
				return client.Email, nil
			}
			continue
		}
		seen[key] = client.SubID
		if existingSub, ok := emailSubIDs[key]; ok {
			if client.SubID == "" || existingSub == "" || existingSub != client.SubID {
				return client.Email, nil
			}
		}
	}
	return "", nil
}

func (s *ClientService) AddInboundClient(inboundSvc *InboundService, data *model.Inbound) (bool, error) {
	return s.addInboundClient(inboundSvc, data, nil)
}

// addInboundClient is AddInboundClient with an optional precomputed email→subId
// map. Bulk callers pass a single snapshot so the global getAllEmailSubIDs scan
// runs once for the whole batch instead of once per target inbound; a nil map
// makes it compute its own (the single-add path).
func (s *ClientService) addInboundClient(inboundSvc *InboundService, data *model.Inbound, emailSubIDs map[string]string) (bool, error) {
	defer lockInbound(data.Id).Unlock()

	clients, err := inboundSvc.GetClients(data)
	if err != nil {
		return false, err
	}

	var settings map[string]any
	err = json.Unmarshal([]byte(data.Settings), &settings)
	if err != nil {
		return false, err
	}

	interfaceClients := settings["clients"].([]any)
	nowTs := time.Now().Unix() * 1000
	for i := range interfaceClients {
		if cm, ok := interfaceClients[i].(map[string]any); ok {
			if _, ok2 := cm["created_at"]; !ok2 {
				cm["created_at"] = nowTs
			}
			cm["updated_at"] = nowTs
			existingSub, _ := cm["subId"].(string)
			if strings.TrimSpace(existingSub) == "" {
				cm["subId"] = random.NumLower(16)
			}
			interfaceClients[i] = cm
		}
	}
	existEmail, err := s.checkEmailsExistForClients(inboundSvc, clients, emailSubIDs)
	if err != nil {
		return false, err
	}
	if existEmail != "" {
		return false, common.NewError("Duplicate email:", existEmail)
	}

	oldInbound, err := inboundSvc.GetInbound(data.Id)
	if err != nil {
		return false, err
	}

	for _, client := range clients {
		if strings.TrimSpace(client.Email) == "" {
			return false, common.NewError("client email is required")
		}
		switch oldInbound.Protocol {
		case "trojan":
			if client.Password == "" {
				return false, common.NewError("empty client ID")
			}
		case "shadowsocks":
			if client.Email == "" {
				return false, common.NewError("empty client ID")
			}
		case "hysteria":
			if client.Auth == "" {
				return false, common.NewError("empty client ID")
			}
		default:
			if client.ID == "" {
				return false, common.NewError("empty client ID")
			}
		}
	}

	var oldSettings map[string]any
	err = json.Unmarshal([]byte(oldInbound.Settings), &oldSettings)
	if err != nil {
		return false, err
	}

	if oldInbound.Protocol == model.Shadowsocks {
		applyShadowsocksClientMethod(interfaceClients, oldSettings)
	}

	oldClients := oldSettings["clients"].([]any)
	oldClients = compactOrphans(database.GetDB(), oldClients)
	oldClients = append(oldClients, interfaceClients...)

	oldSettings["clients"] = oldClients

	newSettings, err := json.MarshalIndent(oldSettings, "", "  ")
	if err != nil {
		return false, err
	}

	oldInbound.Settings = string(newSettings)

	db := database.GetDB()
	tx := db.Begin()

	markDirty := false
	defer func() {
		if err != nil {
			tx.Rollback()
			return
		}
		tx.Commit()
		if markDirty && oldInbound.NodeID != nil {
			if dErr := (&NodeService{}).MarkNodeDirty(*oldInbound.NodeID); dErr != nil {
				logger.Warning("mark node dirty failed:", dErr)
			}
		}
	}()

	needRestart := false
	rt, push, dirty, perr := inboundSvc.nodePushPlan(oldInbound)
	if perr != nil {
		err = perr
		return false, err
	}
	if dirty {
		markDirty = true
	}
	if oldInbound.NodeID == nil {
		if !push {
			needRestart = true
		} else {
			for _, client := range clients {
				if len(client.Email) == 0 {
					needRestart = true
					continue
				}
				inboundSvc.AddClientStat(tx, data.Id, &client)
				if !client.Enable {
					continue
				}
				cipher := ""
				if oldInbound.Protocol == "shadowsocks" {
					cipher = oldSettings["method"].(string)
				}
				err1 := rt.AddUser(context.Background(), oldInbound, map[string]any{
					"email":    client.Email,
					"id":       client.ID,
					"auth":     client.Auth,
					"security": client.Security,
					"flow":     client.Flow,
					"password": client.Password,
					"cipher":   cipher,
				})
				if err1 == nil {
					logger.Debug("Client added on", rt.Name(), ":", client.Email)
				} else {
					logger.Debug("Error in adding client on", rt.Name(), ":", err1)
					needRestart = true
				}
			}
		}
	} else {
		for _, client := range clients {
			if len(client.Email) > 0 {
				inboundSvc.AddClientStat(tx, data.Id, &client)
			}
			if push {
				if err1 := rt.AddClient(context.Background(), oldInbound, client); err1 != nil {
					logger.Warning("Error in adding client on", rt.Name(), ":", err1)
					markDirty = true
					push = false
				}
			}
		}
	}

	if err = tx.Save(oldInbound).Error; err != nil {
		return false, err
	}
	finalClients, gcErr := inboundSvc.GetClients(oldInbound)
	if gcErr != nil {
		err = gcErr
		return false, err
	}
	if err = s.SyncInbound(tx, oldInbound.Id, finalClients); err != nil {
		return false, err
	}
	return needRestart, nil
}

func (s *ClientService) UpdateInboundClient(inboundSvc *InboundService, data *model.Inbound, oldEmail string) (bool, error) {
	defer lockInbound(data.Id).Unlock()

	clients, err := inboundSvc.GetClients(data)
	if err != nil {
		return false, err
	}

	var settings map[string]any
	err = json.Unmarshal([]byte(data.Settings), &settings)
	if err != nil {
		return false, err
	}

	interfaceClients := settings["clients"].([]any)

	oldInbound, err := inboundSvc.GetInbound(data.Id)
	if err != nil {
		return false, err
	}

	oldClients, err := inboundSvc.GetClients(oldInbound)
	if err != nil {
		return false, err
	}

	newClientId := ""
	switch oldInbound.Protocol {
	case "trojan":
		newClientId = clients[0].Password
	case "shadowsocks":
		newClientId = clients[0].Email
	case "hysteria":
		newClientId = clients[0].Auth
	default:
		newClientId = clients[0].ID
	}

	// Locate the client to replace by email — the client's stable identity.
	// Credentials (uuid/password/auth) can drift from the inbound JSON, so they
	// are never used for matching.
	clientIndex := -1
	for index, oldClient := range oldClients {
		if strings.EqualFold(oldClient.Email, oldEmail) {
			oldEmail = oldClient.Email
			clientIndex = index
			break
		}
	}

	if newClientId == "" || clientIndex == -1 {
		return false, common.NewError("empty client ID")
	}
	if strings.TrimSpace(clients[0].Email) == "" {
		return false, common.NewError("client email is required")
	}

	if clients[0].Email != oldEmail {
		existEmail, err := s.checkEmailsExistForClients(inboundSvc, clients, nil)
		if err != nil {
			return false, err
		}
		if existEmail != "" {
			return false, common.NewError("Duplicate email:", existEmail)
		}
	}

	var oldSettings map[string]any
	err = json.Unmarshal([]byte(oldInbound.Settings), &oldSettings)
	if err != nil {
		return false, err
	}
	settingsClients := oldSettings["clients"].([]any)
	var preservedCreated any
	var preservedSubID string
	if clientIndex >= 0 && clientIndex < len(settingsClients) {
		if oldMap, ok := settingsClients[clientIndex].(map[string]any); ok {
			if v, ok2 := oldMap["created_at"]; ok2 {
				preservedCreated = v
			}
			preservedSubID, _ = oldMap["subId"].(string)
		}
	}
	if len(interfaceClients) > 0 {
		if newMap, ok := interfaceClients[0].(map[string]any); ok {
			if preservedCreated == nil {
				preservedCreated = time.Now().Unix() * 1000
			}
			newMap["created_at"] = preservedCreated
			newMap["updated_at"] = time.Now().Unix() * 1000
			newSub, _ := newMap["subId"].(string)
			if strings.TrimSpace(newSub) == "" {
				if strings.TrimSpace(preservedSubID) != "" {
					newMap["subId"] = preservedSubID
				} else {
					newMap["subId"] = random.NumLower(16)
				}
			}
			interfaceClients[0] = newMap
		}
	}
	if oldInbound.Protocol == model.Shadowsocks {
		applyShadowsocksClientMethod(interfaceClients, oldSettings)
	}
	settingsClients[clientIndex] = interfaceClients[0]
	oldSettings["clients"] = settingsClients

	if oldInbound.Protocol == model.VLESS {
		hasVisionFlow := false
		for _, c := range settingsClients {
			cm, ok := c.(map[string]any)
			if !ok {
				continue
			}
			if flow, _ := cm["flow"].(string); flow == "xtls-rprx-vision" {
				hasVisionFlow = true
				break
			}
		}
		if !hasVisionFlow {
			delete(oldSettings, "testseed")
		}
	}

	newSettings, err := json.MarshalIndent(oldSettings, "", "  ")
	if err != nil {
		return false, err
	}

	oldInbound.Settings = string(newSettings)
	db := database.GetDB()
	tx := db.Begin()

	markDirty := false
	defer func() {
		if err != nil {
			tx.Rollback()
			return
		}
		tx.Commit()
		if markDirty && oldInbound.NodeID != nil {
			if dErr := (&NodeService{}).MarkNodeDirty(*oldInbound.NodeID); dErr != nil {
				logger.Warning("mark node dirty failed:", dErr)
			}
		}
	}()

	if len(clients[0].Email) > 0 {
		if len(oldEmail) > 0 {
			emailUnchanged := strings.EqualFold(oldEmail, clients[0].Email)
			targetExists := int64(0)
			if !emailUnchanged {
				if err = tx.Model(xray.ClientTraffic{}).Where("email = ?", clients[0].Email).Count(&targetExists).Error; err != nil {
					return false, err
				}
			}
			if emailUnchanged || targetExists == 0 {
				err = inboundSvc.UpdateClientStat(tx, oldEmail, &clients[0])
				if err != nil {
					return false, err
				}
				err = inboundSvc.UpdateClientIPs(tx, oldEmail, clients[0].Email)
				if err != nil {
					return false, err
				}
			} else {
				stillUsed, sErr := inboundSvc.emailUsedByOtherInbounds(oldEmail, data.Id)
				if sErr != nil {
					return false, sErr
				}
				if !stillUsed {
					if err = inboundSvc.DelClientStat(tx, oldEmail); err != nil {
						return false, err
					}
					if err = inboundSvc.DelClientIPs(tx, oldEmail); err != nil {
						return false, err
					}
				}
				if err = inboundSvc.UpdateClientStat(tx, clients[0].Email, &clients[0]); err != nil {
					return false, err
				}
			}
		} else {
			inboundSvc.AddClientStat(tx, data.Id, &clients[0])
		}
	} else {
		stillUsed, err := inboundSvc.emailUsedByOtherInbounds(oldEmail, data.Id)
		if err != nil {
			return false, err
		}
		if !stillUsed {
			err = inboundSvc.DelClientStat(tx, oldEmail)
			if err != nil {
				return false, err
			}
			err = inboundSvc.DelClientIPs(tx, oldEmail)
			if err != nil {
				return false, err
			}
		}
	}
	needRestart := false
	if len(oldEmail) > 0 {
		rt, push, dirty, perr := inboundSvc.nodePushPlan(oldInbound)
		if perr != nil {
			err = perr
			return false, err
		}
		if dirty {
			markDirty = true
		}
		if oldInbound.NodeID == nil {
			if !push {
				needRestart = true
			} else {
				if oldClients[clientIndex].Enable {
					err1 := rt.RemoveUser(context.Background(), oldInbound, oldEmail)
					if err1 == nil {
						logger.Debug("Old client deleted on", rt.Name(), ":", oldEmail)
					} else if strings.Contains(err1.Error(), fmt.Sprintf("User %s not found.", oldEmail)) {
						logger.Debug("User is already deleted. Nothing to do more...")
					} else {
						logger.Debug("Error in deleting client on", rt.Name(), ":", err1)
						needRestart = true
					}
				}
				if clients[0].Enable {
					cipher := ""
					if oldInbound.Protocol == "shadowsocks" {
						cipher = oldSettings["method"].(string)
					}
					err1 := rt.AddUser(context.Background(), oldInbound, map[string]any{
						"email":    clients[0].Email,
						"id":       clients[0].ID,
						"security": clients[0].Security,
						"flow":     clients[0].Flow,
						"auth":     clients[0].Auth,
						"password": clients[0].Password,
						"cipher":   cipher,
					})
					if err1 == nil {
						logger.Debug("Client edited on", rt.Name(), ":", clients[0].Email)
					} else {
						logger.Debug("Error in adding client on", rt.Name(), ":", err1)
						needRestart = true
					}
				}
			}
		} else if push {
			if err1 := rt.UpdateUser(context.Background(), oldInbound, oldEmail, clients[0]); err1 != nil {
				logger.Warning("Error in updating client on", rt.Name(), ":", err1)
				markDirty = true
			}
		}
	} else {
		logger.Debug("Client old email not found")
		needRestart = true
	}
	if err = tx.Save(oldInbound).Error; err != nil {
		return false, err
	}
	finalClients, gcErr := inboundSvc.GetClients(oldInbound)
	if gcErr != nil {
		err = gcErr
		return false, err
	}
	if err = s.SyncInbound(tx, oldInbound.Id, finalClients); err != nil {
		return false, err
	}
	return needRestart, nil
}

func (s *ClientService) DelInboundClientByEmail(inboundSvc *InboundService, inboundId int, email string, keepTraffic bool) (bool, error) {
	defer lockInbound(inboundId).Unlock()

	oldInbound, err := inboundSvc.GetInbound(inboundId)
	if err != nil {
		logger.Error("Load Old Data Error")
		return false, err
	}

	var settings map[string]any
	if err := json.Unmarshal([]byte(oldInbound.Settings), &settings); err != nil {
		return false, err
	}

	interfaceClients, ok := settings["clients"].([]any)
	if !ok {
		return false, common.NewError("invalid clients format in inbound settings")
	}

	var newClients []any
	needApiDel := false
	found := false

	for _, client := range interfaceClients {
		c, ok := client.(map[string]any)
		if !ok {
			continue
		}
		if cEmail, ok := c["email"].(string); ok && cEmail == email {
			found = true
			needApiDel, _ = c["enable"].(bool)
		} else {
			newClients = append(newClients, client)
		}
	}

	if !found {
		return false, fmt.Errorf("%w for email: %s", ErrClientNotInInbound, email)
	}
	db := database.GetDB()
	newClients = compactOrphans(db, newClients)
	if newClients == nil {
		newClients = []any{}
	}
	settings["clients"] = newClients
	newSettings, err := json.MarshalIndent(settings, "", "  ")
	if err != nil {
		return false, err
	}

	oldInbound.Settings = string(newSettings)

	emailShared, err := inboundSvc.emailUsedByOtherInbounds(email, inboundId)
	if err != nil {
		return false, err
	}

	if !emailShared && !keepTraffic {
		if err := inboundSvc.DelClientIPs(db, email); err != nil {
			logger.Error("Error in delete client IPs")
			return false, err
		}
	}

	needRestart := false
	markDirty := false

	if len(email) > 0 && !emailShared {
		if !keepTraffic {
			traffic, err := inboundSvc.GetClientTrafficByEmail(email)
			if err != nil {
				return false, err
			}
			if traffic != nil {
				if err := inboundSvc.DelClientStat(db, email); err != nil {
					logger.Error("Delete stats Data Error")
					return false, err
				}
			}
		}

		if needApiDel {
			rt, push, dirty, perr := inboundSvc.nodePushPlan(oldInbound)
			if perr != nil {
				return false, perr
			}
			if dirty {
				markDirty = true
			}
			if oldInbound.NodeID == nil {
				if !push {
					needRestart = true
				} else if err1 := rt.RemoveUser(context.Background(), oldInbound, email); err1 == nil {
					logger.Debug("Client deleted on", rt.Name(), ":", email)
					needRestart = false
				} else if strings.Contains(err1.Error(), fmt.Sprintf("User %s not found.", email)) {
					logger.Debug("User is already deleted. Nothing to do more...")
				} else {
					logger.Debug("Error in deleting client on", rt.Name(), ":", email)
					needRestart = true
				}
			} else if push {
				if err1 := rt.DeleteUser(context.Background(), oldInbound, email); err1 != nil {
					logger.Warning("Error in deleting client on", rt.Name(), ":", err1)
					markDirty = true
				}
			}
		}
	}

	if err := db.Save(oldInbound).Error; err != nil {
		return false, err
	}
	finalClients, gcErr := inboundSvc.GetClients(oldInbound)
	if gcErr != nil {
		return false, gcErr
	}
	if err := s.SyncInbound(db, inboundId, finalClients); err != nil {
		return false, err
	}
	if markDirty && oldInbound.NodeID != nil {
		if dErr := (&NodeService{}).MarkNodeDirty(*oldInbound.NodeID); dErr != nil {
			logger.Warning("mark node dirty failed:", dErr)
		}
	}
	return needRestart, nil
}

func (s *ClientService) SetClientTelegramUserID(inboundSvc *InboundService, trafficId int, tgId int64) (bool, error) {
	traffic, inbound, err := inboundSvc.GetClientInboundByTrafficID(trafficId)
	if err != nil {
		return false, err
	}
	if inbound == nil {
		return false, common.NewError("Inbound Not Found For Traffic ID:", trafficId)
	}

	clientEmail := traffic.Email

	oldClients, err := inboundSvc.GetClients(inbound)
	if err != nil {
		return false, err
	}

	found := false
	for _, oldClient := range oldClients {
		if oldClient.Email == clientEmail {
			found = true
			break
		}
	}

	if !found {
		return false, common.NewError("Client Not Found For Email:", clientEmail)
	}

	var settings map[string]any
	err = json.Unmarshal([]byte(inbound.Settings), &settings)
	if err != nil {
		return false, err
	}
	clients := settings["clients"].([]any)
	var newClients []any
	for client_index := range clients {
		c := clients[client_index].(map[string]any)
		if c["email"] == clientEmail {
			c["tgId"] = tgId
			c["updated_at"] = time.Now().Unix() * 1000
			newClients = append(newClients, any(c))
		}
	}
	settings["clients"] = newClients
	modifiedSettings, err := json.MarshalIndent(settings, "", "  ")
	if err != nil {
		return false, err
	}
	inbound.Settings = string(modifiedSettings)
	needRestart, err := s.UpdateInboundClient(inboundSvc, inbound, clientEmail)
	return needRestart, err
}

func (s *ClientService) CheckIsEnabledByEmail(inboundSvc *InboundService, clientEmail string) (bool, error) {
	_, inbound, err := inboundSvc.GetClientInboundByEmail(clientEmail)
	if err != nil {
		return false, err
	}
	if inbound == nil {
		return false, common.NewError("Inbound Not Found For Email:", clientEmail)
	}

	clients, err := inboundSvc.GetClients(inbound)
	if err != nil {
		return false, err
	}

	isEnable := false

	for _, client := range clients {
		if client.Email == clientEmail {
			isEnable = client.Enable
			break
		}
	}

	return isEnable, err
}

func (s *ClientService) ToggleClientEnableByEmail(inboundSvc *InboundService, clientEmail string) (bool, bool, error) {
	_, inbound, err := inboundSvc.GetClientInboundByEmail(clientEmail)
	if err != nil {
		return false, false, err
	}
	if inbound == nil {
		return false, false, common.NewError("Inbound Not Found For Email:", clientEmail)
	}

	oldClients, err := inboundSvc.GetClients(inbound)
	if err != nil {
		return false, false, err
	}

	found := false
	clientOldEnabled := false

	for _, oldClient := range oldClients {
		if oldClient.Email == clientEmail {
			found = true
			clientOldEnabled = oldClient.Enable
			break
		}
	}

	if !found {
		return false, false, common.NewError("Client Not Found For Email:", clientEmail)
	}

	var settings map[string]any
	err = json.Unmarshal([]byte(inbound.Settings), &settings)
	if err != nil {
		return false, false, err
	}
	clients := settings["clients"].([]any)
	var newClients []any
	for client_index := range clients {
		c := clients[client_index].(map[string]any)
		if c["email"] == clientEmail {
			c["enable"] = !clientOldEnabled
			c["updated_at"] = time.Now().Unix() * 1000
			newClients = append(newClients, any(c))
		}
	}
	settings["clients"] = newClients
	modifiedSettings, err := json.MarshalIndent(settings, "", "  ")
	if err != nil {
		return false, false, err
	}
	inbound.Settings = string(modifiedSettings)

	needRestart, err := s.UpdateInboundClient(inboundSvc, inbound, clientEmail)
	if err != nil {
		return false, needRestart, err
	}

	return !clientOldEnabled, needRestart, nil
}

func (s *ClientService) SetClientEnableByEmail(inboundSvc *InboundService, clientEmail string, enable bool) (bool, bool, error) {
	current, err := s.CheckIsEnabledByEmail(inboundSvc, clientEmail)
	if err != nil {
		return false, false, err
	}
	if current == enable {
		return false, false, nil
	}
	newEnabled, needRestart, err := s.ToggleClientEnableByEmail(inboundSvc, clientEmail)
	if err != nil {
		return false, needRestart, err
	}
	return newEnabled == enable, needRestart, nil
}

// applyClientFieldByEmail loads the inbound currently hosting clientEmail,
// confirms the client exists, applies mutate to the matching client (plus a
// refreshed updated_at), and hands a single-client update payload to
// UpdateInboundClient. The rebuilt clients array intentionally contains only
// the matched client — that is the input contract UpdateInboundClient expects
// (clients[0] is the new data; clientEmail locates the row to replace). It
// backs the single-field by-email setters below.
func (s *ClientService) applyClientFieldByEmail(inboundSvc *InboundService, clientEmail string, mutate func(c map[string]any)) (bool, error) {
	_, inbound, err := inboundSvc.GetClientInboundByEmail(clientEmail)
	if err != nil {
		return false, err
	}
	if inbound == nil {
		return false, common.NewError("Inbound Not Found For Email:", clientEmail)
	}

	oldClients, err := inboundSvc.GetClients(inbound)
	if err != nil {
		return false, err
	}

	found := false
	for _, oldClient := range oldClients {
		if oldClient.Email == clientEmail {
			found = true
			break
		}
	}

	if !found {
		return false, common.NewError("Client Not Found For Email:", clientEmail)
	}

	var settings map[string]any
	err = json.Unmarshal([]byte(inbound.Settings), &settings)
	if err != nil {
		return false, err
	}
	clients := settings["clients"].([]any)
	var newClients []any
	for client_index := range clients {
		c := clients[client_index].(map[string]any)
		if c["email"] == clientEmail {
			mutate(c)
			c["updated_at"] = time.Now().Unix() * 1000
			newClients = append(newClients, any(c))
		}
	}
	settings["clients"] = newClients
	modifiedSettings, err := json.MarshalIndent(settings, "", "  ")
	if err != nil {
		return false, err
	}
	inbound.Settings = string(modifiedSettings)
	return s.UpdateInboundClient(inboundSvc, inbound, clientEmail)
}

func (s *ClientService) ResetClientIpLimitByEmail(inboundSvc *InboundService, clientEmail string, count int) (bool, error) {
	return s.applyClientFieldByEmail(inboundSvc, clientEmail, func(c map[string]any) {
		c["limitIp"] = count
	})
}

func (s *ClientService) ResetClientExpiryTimeByEmail(inboundSvc *InboundService, clientEmail string, expiry_time int64) (bool, error) {
	return s.applyClientFieldByEmail(inboundSvc, clientEmail, func(c map[string]any) {
		c["expiryTime"] = expiry_time
	})
}

func (s *ClientService) ResetClientTrafficLimitByEmail(inboundSvc *InboundService, clientEmail string, totalGB int) (bool, error) {
	if totalGB < 0 {
		return false, common.NewError("totalGB must be >= 0")
	}
	return s.applyClientFieldByEmail(inboundSvc, clientEmail, func(c map[string]any) {
		c["totalGB"] = totalGB * 1024 * 1024 * 1024
	})
}