refactor(backend): 引入端口接口模式

backend/internal/service/account_usage_service.go

@@ -12,7 +12,7 @@ import (
 	"time"
 
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 )
 
 // usageCache 用于缓存usage数据
@@ -67,15 +67,17 @@ type ClaudeUsageResponse struct {
 
 // AccountUsageService 账号使用量查询服务
 type AccountUsageService struct {
-	repos        *repository.Repositories
+	accountRepo  ports.AccountRepository
+	usageLogRepo ports.UsageLogRepository
 	oauthService *OAuthService
 	httpClient   *http.Client
 }
 
 // NewAccountUsageService 创建AccountUsageService实例
-func NewAccountUsageService(repos *repository.Repositories, oauthService *OAuthService) *AccountUsageService {
+func NewAccountUsageService(accountRepo ports.AccountRepository, usageLogRepo ports.UsageLogRepository, oauthService *OAuthService) *AccountUsageService {
 	return &AccountUsageService{
-		repos:        repos,
+		accountRepo:  accountRepo,
+		usageLogRepo: usageLogRepo,
 		oauthService: oauthService,
 		httpClient: &http.Client{
 			Timeout: 30 * time.Second,
@@ -88,7 +90,7 @@ func NewAccountUsageService(repos *repository.Repositories, oauthService *OAuthS
 // Setup Token账号: 根据session_window推算5h窗口，7d数据不可用（没有profile scope）
 // API Key账号: 不支持usage查询
 func (s *AccountUsageService) GetUsage(ctx context.Context, accountID int64) (*UsageInfo, error) {
-	account, err := s.repos.Account.GetByID(ctx, accountID)
+	account, err := s.accountRepo.GetByID(ctx, accountID)
 	if err != nil {
 		return nil, fmt.Errorf("get account failed: %w", err)
 	}
@@ -148,7 +150,7 @@ func (s *AccountUsageService) addWindowStats(ctx context.Context, account *model
 		startTime = time.Now().Add(-5 * time.Hour)
 	}
 
-	stats, err := s.repos.UsageLog.GetAccountWindowStats(ctx, account.ID, startTime)
+	stats, err := s.usageLogRepo.GetAccountWindowStats(ctx, account.ID, startTime)
 	if err != nil {
 		log.Printf("Failed to get window stats for account %d: %v", account.ID, err)
 		return
@@ -163,7 +165,7 @@ func (s *AccountUsageService) addWindowStats(ctx context.Context, account *model
 
 // GetTodayStats 获取账号今日统计
 func (s *AccountUsageService) GetTodayStats(ctx context.Context, accountID int64) (*WindowStats, error) {
-	stats, err := s.repos.UsageLog.GetAccountTodayStats(ctx, accountID)
+	stats, err := s.usageLogRepo.GetAccountTodayStats(ctx, accountID)
 	if err != nil {
 		return nil, fmt.Errorf("get today stats failed: %w", err)
 	}

backend/internal/service/admin_service.go

@@ -13,7 +13,8 @@ import (
 	"time"
 
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/pkg/pagination"
+	"sub2api/internal/service/ports"
 
 	"golang.org/x/net/proxy"
 	"gorm.io/gorm"
@@ -179,35 +180,45 @@ type ProxyTestResult struct {
 
 // adminServiceImpl implements AdminService
 type adminServiceImpl struct {
-	userRepo            *repository.UserRepository
-	groupRepo           *repository.GroupRepository
-	accountRepo         *repository.AccountRepository
-	proxyRepo           *repository.ProxyRepository
-	apiKeyRepo          *repository.ApiKeyRepository
-	redeemCodeRepo      *repository.RedeemCodeRepository
-	usageLogRepo        *repository.UsageLogRepository
-	userSubRepo         *repository.UserSubscriptionRepository
+	userRepo            ports.UserRepository
+	groupRepo           ports.GroupRepository
+	accountRepo         ports.AccountRepository
+	proxyRepo           ports.ProxyRepository
+	apiKeyRepo          ports.ApiKeyRepository
+	redeemCodeRepo      ports.RedeemCodeRepository
+	usageLogRepo        ports.UsageLogRepository
+	userSubRepo         ports.UserSubscriptionRepository
 	billingCacheService *BillingCacheService
 }
 
 // NewAdminService creates a new AdminService
-func NewAdminService(repos *repository.Repositories, billingCacheService *BillingCacheService) AdminService {
+func NewAdminService(
+	userRepo ports.UserRepository,
+	groupRepo ports.GroupRepository,
+	accountRepo ports.AccountRepository,
+	proxyRepo ports.ProxyRepository,
+	apiKeyRepo ports.ApiKeyRepository,
+	redeemCodeRepo ports.RedeemCodeRepository,
+	usageLogRepo ports.UsageLogRepository,
+	userSubRepo ports.UserSubscriptionRepository,
+	billingCacheService *BillingCacheService,
+) AdminService {
 	return &adminServiceImpl{
-		userRepo:            repos.User,
-		groupRepo:           repos.Group,
-		accountRepo:         repos.Account,
-		proxyRepo:           repos.Proxy,
-		apiKeyRepo:          repos.ApiKey,
-		redeemCodeRepo:      repos.RedeemCode,
-		usageLogRepo:        repos.UsageLog,
-		userSubRepo:         repos.UserSubscription,
+		userRepo:            userRepo,
+		groupRepo:           groupRepo,
+		accountRepo:         accountRepo,
+		proxyRepo:           proxyRepo,
+		apiKeyRepo:          apiKeyRepo,
+		redeemCodeRepo:      redeemCodeRepo,
+		usageLogRepo:        usageLogRepo,
+		userSubRepo:         userSubRepo,
 		billingCacheService: billingCacheService,
 	}
 }
 
 // User management implementations
 func (s *adminServiceImpl) ListUsers(ctx context.Context, page, pageSize int, status, role, search string) ([]model.User, int64, error) {
-	params := repository.PaginationParams{Page: page, PageSize: pageSize}
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	users, result, err := s.userRepo.ListWithFilters(ctx, params, status, role, search)
 	if err != nil {
 		return nil, 0, err
@@ -376,7 +387,7 @@ func (s *adminServiceImpl) UpdateUserBalance(ctx context.Context, userID int64,
 }
 
 func (s *adminServiceImpl) GetUserAPIKeys(ctx context.Context, userID int64, page, pageSize int) ([]model.ApiKey, int64, error) {
-	params := repository.PaginationParams{Page: page, PageSize: pageSize}
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	keys, result, err := s.apiKeyRepo.ListByUserID(ctx, userID, params)
 	if err != nil {
 		return nil, 0, err
@@ -397,7 +408,7 @@ func (s *adminServiceImpl) GetUserUsageStats(ctx context.Context, userID int64,
 
 // Group management implementations
 func (s *adminServiceImpl) ListGroups(ctx context.Context, page, pageSize int, platform, status string, isExclusive *bool) ([]model.Group, int64, error) {
-	params := repository.PaginationParams{Page: page, PageSize: pageSize}
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	groups, result, err := s.groupRepo.ListWithFilters(ctx, params, platform, status, isExclusive)
 	if err != nil {
 		return nil, 0, err
@@ -568,7 +579,7 @@ func (s *adminServiceImpl) DeleteGroup(ctx context.Context, id int64) error {
 }
 
 func (s *adminServiceImpl) GetGroupAPIKeys(ctx context.Context, groupID int64, page, pageSize int) ([]model.ApiKey, int64, error) {
-	params := repository.PaginationParams{Page: page, PageSize: pageSize}
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	keys, result, err := s.apiKeyRepo.ListByGroupID(ctx, groupID, params)
 	if err != nil {
 		return nil, 0, err
@@ -578,7 +589,7 @@ func (s *adminServiceImpl) GetGroupAPIKeys(ctx context.Context, groupID int64, p
 
 // Account management implementations
 func (s *adminServiceImpl) ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string) ([]model.Account, int64, error) {
-	params := repository.PaginationParams{Page: page, PageSize: pageSize}
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	accounts, result, err := s.accountRepo.ListWithFilters(ctx, params, platform, accountType, status, search)
 	if err != nil {
 		return nil, 0, err
@@ -696,7 +707,7 @@ func (s *adminServiceImpl) SetAccountSchedulable(ctx context.Context, id int64,
 
 // Proxy management implementations
 func (s *adminServiceImpl) ListProxies(ctx context.Context, page, pageSize int, protocol, status, search string) ([]model.Proxy, int64, error) {
-	params := repository.PaginationParams{Page: page, PageSize: pageSize}
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	proxies, result, err := s.proxyRepo.ListWithFilters(ctx, params, protocol, status, search)
 	if err != nil {
 		return nil, 0, err
@@ -781,7 +792,7 @@ func (s *adminServiceImpl) CheckProxyExists(ctx context.Context, host string, po
 
 // Redeem code management implementations
 func (s *adminServiceImpl) ListRedeemCodes(ctx context.Context, page, pageSize int, codeType, status, search string) ([]model.RedeemCode, int64, error) {
-	params := repository.PaginationParams{Page: page, PageSize: pageSize}
+	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	codes, result, err := s.redeemCodeRepo.ListWithFilters(ctx, params, codeType, status, search)
 	if err != nil {
 		return nil, 0, err

backend/internal/service/api_key_service.go

@@ -8,8 +8,9 @@ import (
 	"fmt"
 	"sub2api/internal/config"
 	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
 	"sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 	"time"
 
 	"github.com/redis/go-redis/v9"
@@ -47,20 +48,20 @@ type UpdateApiKeyRequest struct {
 
 // ApiKeyService API Key服务
 type ApiKeyService struct {
-	apiKeyRepo  *repository.ApiKeyRepository
-	userRepo    *repository.UserRepository
-	groupRepo   *repository.GroupRepository
-	userSubRepo *repository.UserSubscriptionRepository
+	apiKeyRepo  ports.ApiKeyRepository
+	userRepo    ports.UserRepository
+	groupRepo   ports.GroupRepository
+	userSubRepo ports.UserSubscriptionRepository
 	rdb         *redis.Client
 	cfg         *config.Config
 }
 
 // NewApiKeyService 创建API Key服务实例
 func NewApiKeyService(
-	apiKeyRepo *repository.ApiKeyRepository,
-	userRepo *repository.UserRepository,
-	groupRepo *repository.GroupRepository,
-	userSubRepo *repository.UserSubscriptionRepository,
+	apiKeyRepo ports.ApiKeyRepository,
+	userRepo ports.UserRepository,
+	groupRepo ports.GroupRepository,
+	userSubRepo ports.UserSubscriptionRepository,
 	rdb *redis.Client,
 	cfg *config.Config,
 ) *ApiKeyService {
@@ -237,7 +238,7 @@ func (s *ApiKeyService) Create(ctx context.Context, userID int64, req CreateApiK
 }
 
 // List 获取用户的API Key列表
-func (s *ApiKeyService) List(ctx context.Context, userID int64, params repository.PaginationParams) ([]model.ApiKey, *repository.PaginationResult, error) {
+func (s *ApiKeyService) List(ctx context.Context, userID int64, params pagination.PaginationParams) ([]model.ApiKey, *pagination.PaginationResult, error) {
 	keys, pagination, err := s.apiKeyRepo.ListByUserID(ctx, userID, params)
 	if err != nil {
 		return nil, nil, fmt.Errorf("list api keys: %w", err)

backend/internal/service/auth_service.go

@@ -7,7 +7,7 @@ import (
 	"log"
 	"sub2api/internal/config"
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 	"time"
 
 	"github.com/golang-jwt/jwt/v5"
@@ -35,7 +35,7 @@ type JWTClaims struct {
 
 // AuthService 认证服务
 type AuthService struct {
-	userRepo          *repository.UserRepository
+	userRepo          ports.UserRepository
 	cfg               *config.Config
 	settingService    *SettingService
 	emailService      *EmailService
@@ -45,7 +45,7 @@ type AuthService struct {
 
 // NewAuthService 创建认证服务实例
 func NewAuthService(
-	userRepo *repository.UserRepository,
+	userRepo ports.UserRepository,
 	cfg *config.Config,
 	settingService *SettingService,
 	emailService *EmailService,

backend/internal/service/billing_cache_service.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )
@@ -81,12 +81,12 @@ type subscriptionCacheData struct {
 // 负责余额和订阅数据的缓存管理，提供高性能的计费资格检查
 type BillingCacheService struct {
 	rdb      *redis.Client
-	userRepo *repository.UserRepository
-	subRepo  *repository.UserSubscriptionRepository
+	userRepo ports.UserRepository
+	subRepo  ports.UserSubscriptionRepository
 }
 
 // NewBillingCacheService 创建计费缓存服务
-func NewBillingCacheService(rdb *redis.Client, userRepo *repository.UserRepository, subRepo *repository.UserSubscriptionRepository) *BillingCacheService {
+func NewBillingCacheService(rdb *redis.Client, userRepo ports.UserRepository, subRepo ports.UserSubscriptionRepository) *BillingCacheService {
 	return &BillingCacheService{
 		rdb:      rdb,
 		userRepo: userRepo,

backend/internal/service/email_service.go

@@ -11,7 +11,7 @@ import (
 	"net/smtp"
 	"strconv"
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 	"time"
 
 	"github.com/redis/go-redis/v9"
@@ -51,12 +51,12 @@ type SmtpConfig struct {
 
 // EmailService 邮件服务
 type EmailService struct {
-	settingRepo *repository.SettingRepository
+	settingRepo ports.SettingRepository
 	rdb         *redis.Client
 }
 
 // NewEmailService 创建邮件服务实例
-func NewEmailService(settingRepo *repository.SettingRepository, rdb *redis.Client) *EmailService {
+func NewEmailService(settingRepo ports.SettingRepository, rdb *redis.Client) *EmailService {
 	return &EmailService{
 		settingRepo: settingRepo,
 		rdb:         rdb,

backend/internal/service/gateway_service.go

@@ -21,7 +21,7 @@ import (
 	"sub2api/internal/config"
 	"sub2api/internal/model"
 	"sub2api/internal/pkg/claude"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 
 	"github.com/gin-gonic/gin"
 	"github.com/redis/go-redis/v9"
@@ -78,7 +78,10 @@ type ForwardResult struct {
 
 // GatewayService handles API gateway operations
 type GatewayService struct {
-	repos               *repository.Repositories
+	accountRepo         ports.AccountRepository
+	usageLogRepo        ports.UsageLogRepository
+	userRepo            ports.UserRepository
+	userSubRepo         ports.UserSubscriptionRepository
 	rdb                 *redis.Client
 	cfg                 *config.Config
 	oauthService        *OAuthService
@@ -90,7 +93,19 @@ type GatewayService struct {
 }
 
 // NewGatewayService creates a new GatewayService
-func NewGatewayService(repos *repository.Repositories, rdb *redis.Client, cfg *config.Config, oauthService *OAuthService, billingService *BillingService, rateLimitService *RateLimitService, billingCacheService *BillingCacheService, identityService *IdentityService) *GatewayService {
+func NewGatewayService(
+	accountRepo ports.AccountRepository,
+	usageLogRepo ports.UsageLogRepository,
+	userRepo ports.UserRepository,
+	userSubRepo ports.UserSubscriptionRepository,
+	rdb *redis.Client,
+	cfg *config.Config,
+	oauthService *OAuthService,
+	billingService *BillingService,
+	rateLimitService *RateLimitService,
+	billingCacheService *BillingCacheService,
+	identityService *IdentityService,
+) *GatewayService {
 	// 计算响应头超时时间
 	responseHeaderTimeout := time.Duration(cfg.Gateway.ResponseHeaderTimeout) * time.Second
 	if responseHeaderTimeout == 0 {
@@ -105,7 +120,10 @@ func NewGatewayService(repos *repository.Repositories, rdb *redis.Client, cfg *c
 		// 注意：不设置整体 Timeout，让流式响应可以无限时间传输
 	}
 	return &GatewayService{
-		repos:               repos,
+		accountRepo:         accountRepo,
+		usageLogRepo:        usageLogRepo,
+		userRepo:            userRepo,
+		userSubRepo:         userSubRepo,
 		rdb:                 rdb,
 		cfg:                 cfg,
 		oauthService:        oauthService,
@@ -274,7 +292,7 @@ func (s *GatewayService) SelectAccountForModel(ctx context.Context, groupID *int
 	if sessionHash != "" {
 		accountID, err := s.rdb.Get(ctx, stickySessionPrefix+sessionHash).Int64()
 		if err == nil && accountID > 0 {
-			account, err := s.repos.Account.GetByID(ctx, accountID)
+			account, err := s.accountRepo.GetByID(ctx, accountID)
 			// 使用IsSchedulable代替IsActive，确保限流/过载账号不会被选中
 			// 同时检查模型支持
 			if err == nil && account.IsSchedulable() && (requestedModel == "" || account.IsModelSupported(requestedModel)) {
@@ -289,9 +307,9 @@ func (s *GatewayService) SelectAccountForModel(ctx context.Context, groupID *int
 	var accounts []model.Account
 	var err error
 	if groupID != nil {
-		accounts, err = s.repos.Account.ListSchedulableByGroupID(ctx, *groupID)
+		accounts, err = s.accountRepo.ListSchedulableByGroupID(ctx, *groupID)
 	} else {
-		accounts, err = s.repos.Account.ListSchedulable(ctx)
+		accounts, err = s.accountRepo.ListSchedulable(ctx)
 	}
 	if err != nil {
 		return nil, fmt.Errorf("query accounts failed: %w", err)
@@ -378,7 +396,7 @@ func (s *GatewayService) getOAuthToken(ctx context.Context, account *model.Accou
 			account.Credentials["refresh_token"] = tokenInfo.RefreshToken
 		}
 
-		if err := s.repos.Account.Update(ctx, account); err != nil {
+		if err := s.accountRepo.Update(ctx, account); err != nil {
 			log.Printf("Failed to update account credentials: %v", err)
 		}
 
@@ -667,7 +685,7 @@ func (s *GatewayService) forceRefreshToken(ctx context.Context, account *model.A
 		account.Credentials["refresh_token"] = tokenInfo.RefreshToken
 	}
 
-	if err := s.repos.Account.Update(ctx, account); err != nil {
+	if err := s.accountRepo.Update(ctx, account); err != nil {
 		log.Printf("Failed to update account credentials: %v", err)
 	}
 
@@ -999,7 +1017,7 @@ func (s *GatewayService) RecordUsage(ctx context.Context, input *RecordUsageInpu
 		usageLog.SubscriptionID = &subscription.ID
 	}
 
-	if err := s.repos.UsageLog.Create(ctx, usageLog); err != nil {
+	if err := s.usageLogRepo.Create(ctx, usageLog); err != nil {
 		log.Printf("Create usage log failed: %v", err)
 	}
 
@@ -1007,7 +1025,7 @@ func (s *GatewayService) RecordUsage(ctx context.Context, input *RecordUsageInpu
 	if isSubscriptionBilling {
 		// 订阅模式：更新订阅用量（使用 TotalCost 原始费用，不考虑倍率）
 		if cost.TotalCost > 0 {
-			if err := s.repos.UserSubscription.IncrementUsage(ctx, subscription.ID, cost.TotalCost); err != nil {
+			if err := s.userSubRepo.IncrementUsage(ctx, subscription.ID, cost.TotalCost); err != nil {
 				log.Printf("Increment subscription usage failed: %v", err)
 			}
 			// 异步更新订阅缓存
@@ -1022,7 +1040,7 @@ func (s *GatewayService) RecordUsage(ctx context.Context, input *RecordUsageInpu
 	} else {
 		// 余额模式：扣除用户余额（使用 ActualCost 考虑倍率后的费用）
 		if cost.ActualCost > 0 {
-			if err := s.repos.User.DeductBalance(ctx, user.ID, cost.ActualCost); err != nil {
+			if err := s.userRepo.DeductBalance(ctx, user.ID, cost.ActualCost); err != nil {
 				log.Printf("Deduct balance failed: %v", err)
 			}
 			// 异步更新余额缓存
@@ -1037,7 +1055,7 @@ func (s *GatewayService) RecordUsage(ctx context.Context, input *RecordUsageInpu
 	}
 
 	// 更新账号最后使用时间
-	if err := s.repos.Account.UpdateLastUsed(ctx, account.ID); err != nil {
+	if err := s.accountRepo.UpdateLastUsed(ctx, account.ID); err != nil {
 		log.Printf("Update last used failed: %v", err)
 	}
 

backend/internal/service/group_service.go

@@ -5,7 +5,8 @@ import (
 	"errors"
 	"fmt"
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/pkg/pagination"
+	"sub2api/internal/service/ports"
 
 	"gorm.io/gorm"
 )
@@ -34,11 +35,11 @@ type UpdateGroupRequest struct {
 
 // GroupService 分组管理服务
 type GroupService struct {
-	groupRepo *repository.GroupRepository
+	groupRepo ports.GroupRepository
 }
 
 // NewGroupService 创建分组服务实例
-func NewGroupService(groupRepo *repository.GroupRepository) *GroupService {
+func NewGroupService(groupRepo ports.GroupRepository) *GroupService {
 	return &GroupService{
 		groupRepo: groupRepo,
 	}
@@ -84,7 +85,7 @@ func (s *GroupService) GetByID(ctx context.Context, id int64) (*model.Group, err
 }
 
 // List 获取分组列表
-func (s *GroupService) List(ctx context.Context, params repository.PaginationParams) ([]model.Group, *repository.PaginationResult, error) {
+func (s *GroupService) List(ctx context.Context, params pagination.PaginationParams) ([]model.Group, *pagination.PaginationResult, error) {
 	groups, pagination, err := s.groupRepo.List(ctx, params)
 	if err != nil {
 		return nil, nil, fmt.Errorf("list groups: %w", err)

backend/internal/service/oauth_service.go

@@ -12,7 +12,7 @@ import (
 
 	"sub2api/internal/model"
 	"sub2api/internal/pkg/oauth"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 
 	"github.com/imroc/req/v3"
 )
@@ -20,11 +20,11 @@ import (
 // OAuthService handles OAuth authentication flows
 type OAuthService struct {
 	sessionStore *oauth.SessionStore
-	proxyRepo    *repository.ProxyRepository
+	proxyRepo    ports.ProxyRepository
 }
 
 // NewOAuthService creates a new OAuth service
-func NewOAuthService(proxyRepo *repository.ProxyRepository) *OAuthService {
+func NewOAuthService(proxyRepo ports.ProxyRepository) *OAuthService {
 	return &OAuthService{
 		sessionStore: oauth.NewSessionStore(),
 		proxyRepo:    proxyRepo,

backend/internal/service/ports/account.go

+package ports
+
+import (
+	"context"
+	"time"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+)
+
+type AccountRepository interface {
+	Create(ctx context.Context, account *model.Account) error
+	GetByID(ctx context.Context, id int64) (*model.Account, error)
+	Update(ctx context.Context, account *model.Account) error
+	Delete(ctx context.Context, id int64) error
+
+	List(ctx context.Context, params pagination.PaginationParams) ([]model.Account, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, accountType, status, search string) ([]model.Account, *pagination.PaginationResult, error)
+	ListByGroup(ctx context.Context, groupID int64) ([]model.Account, error)
+	ListActive(ctx context.Context) ([]model.Account, error)
+	ListByPlatform(ctx context.Context, platform string) ([]model.Account, error)
+
+	UpdateLastUsed(ctx context.Context, id int64) error
+	SetError(ctx context.Context, id int64, errorMsg string) error
+	SetSchedulable(ctx context.Context, id int64, schedulable bool) error
+	BindGroups(ctx context.Context, accountID int64, groupIDs []int64) error
+
+	ListSchedulable(ctx context.Context) ([]model.Account, error)
+	ListSchedulableByGroupID(ctx context.Context, groupID int64) ([]model.Account, error)
+
+	SetRateLimited(ctx context.Context, id int64, resetAt time.Time) error
+	SetOverloaded(ctx context.Context, id int64, until time.Time) error
+	ClearRateLimit(ctx context.Context, id int64) error
+	UpdateSessionWindow(ctx context.Context, id int64, start, end *time.Time, status string) error
+}

backend/internal/service/ports/api_key.go

+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+)
+
+type ApiKeyRepository interface {
+	Create(ctx context.Context, key *model.ApiKey) error
+	GetByID(ctx context.Context, id int64) (*model.ApiKey, error)
+	GetByKey(ctx context.Context, key string) (*model.ApiKey, error)
+	Update(ctx context.Context, key *model.ApiKey) error
+	Delete(ctx context.Context, id int64) error
+
+	ListByUserID(ctx context.Context, userID int64, params pagination.PaginationParams) ([]model.ApiKey, *pagination.PaginationResult, error)
+	CountByUserID(ctx context.Context, userID int64) (int64, error)
+	ExistsByKey(ctx context.Context, key string) (bool, error)
+	ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]model.ApiKey, *pagination.PaginationResult, error)
+	SearchApiKeys(ctx context.Context, userID int64, keyword string, limit int) ([]model.ApiKey, error)
+	ClearGroupIDByGroupID(ctx context.Context, groupID int64) (int64, error)
+	CountByGroupID(ctx context.Context, groupID int64) (int64, error)
+}

backend/internal/service/ports/group.go

+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+
+	"gorm.io/gorm"
+)
+
+type GroupRepository interface {
+	Create(ctx context.Context, group *model.Group) error
+	GetByID(ctx context.Context, id int64) (*model.Group, error)
+	Update(ctx context.Context, group *model.Group) error
+	Delete(ctx context.Context, id int64) error
+
+	List(ctx context.Context, params pagination.PaginationParams) ([]model.Group, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, status string, isExclusive *bool) ([]model.Group, *pagination.PaginationResult, error)
+	ListActive(ctx context.Context) ([]model.Group, error)
+	ListActiveByPlatform(ctx context.Context, platform string) ([]model.Group, error)
+
+	ExistsByName(ctx context.Context, name string) (bool, error)
+	GetAccountCount(ctx context.Context, groupID int64) (int64, error)
+	DeleteAccountGroupsByGroupID(ctx context.Context, groupID int64) (int64, error)
+
+	DB() *gorm.DB
+}

backend/internal/service/ports/proxy.go

+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+)
+
+type ProxyRepository interface {
+	Create(ctx context.Context, proxy *model.Proxy) error
+	GetByID(ctx context.Context, id int64) (*model.Proxy, error)
+	Update(ctx context.Context, proxy *model.Proxy) error
+	Delete(ctx context.Context, id int64) error
+
+	List(ctx context.Context, params pagination.PaginationParams) ([]model.Proxy, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, protocol, status, search string) ([]model.Proxy, *pagination.PaginationResult, error)
+	ListActive(ctx context.Context) ([]model.Proxy, error)
+	ListActiveWithAccountCount(ctx context.Context) ([]model.ProxyWithAccountCount, error)
+
+	ExistsByHostPortAuth(ctx context.Context, host string, port int, username, password string) (bool, error)
+	CountAccountsByProxyID(ctx context.Context, proxyID int64) (int64, error)
+}

backend/internal/service/ports/redeem_code.go

+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+)
+
+type RedeemCodeRepository interface {
+	Create(ctx context.Context, code *model.RedeemCode) error
+	CreateBatch(ctx context.Context, codes []model.RedeemCode) error
+	GetByID(ctx context.Context, id int64) (*model.RedeemCode, error)
+	GetByCode(ctx context.Context, code string) (*model.RedeemCode, error)
+	Update(ctx context.Context, code *model.RedeemCode) error
+	Delete(ctx context.Context, id int64) error
+	Use(ctx context.Context, id, userID int64) error
+
+	List(ctx context.Context, params pagination.PaginationParams) ([]model.RedeemCode, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, codeType, status, search string) ([]model.RedeemCode, *pagination.PaginationResult, error)
+	ListByUser(ctx context.Context, userID int64, limit int) ([]model.RedeemCode, error)
+}

backend/internal/service/ports/setting.go

+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+)
+
+type SettingRepository interface {
+	Get(ctx context.Context, key string) (*model.Setting, error)
+	GetValue(ctx context.Context, key string) (string, error)
+	Set(ctx context.Context, key, value string) error
+	GetMultiple(ctx context.Context, keys []string) (map[string]string, error)
+	SetMultiple(ctx context.Context, settings map[string]string) error
+	GetAll(ctx context.Context) (map[string]string, error)
+	Delete(ctx context.Context, key string) error
+}

backend/internal/service/ports/usage_log.go

+package ports
+
+import (
+	"context"
+	"time"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+	"sub2api/internal/pkg/usagestats"
+)
+
+type UsageLogRepository interface {
+	Create(ctx context.Context, log *model.UsageLog) error
+	GetByID(ctx context.Context, id int64) (*model.UsageLog, error)
+	Delete(ctx context.Context, id int64) error
+
+	ListByUser(ctx context.Context, userID int64, params pagination.PaginationParams) ([]model.UsageLog, *pagination.PaginationResult, error)
+	ListByApiKey(ctx context.Context, apiKeyID int64, params pagination.PaginationParams) ([]model.UsageLog, *pagination.PaginationResult, error)
+	ListByAccount(ctx context.Context, accountID int64, params pagination.PaginationParams) ([]model.UsageLog, *pagination.PaginationResult, error)
+
+	ListByUserAndTimeRange(ctx context.Context, userID int64, startTime, endTime time.Time) ([]model.UsageLog, *pagination.PaginationResult, error)
+	ListByApiKeyAndTimeRange(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) ([]model.UsageLog, *pagination.PaginationResult, error)
+	ListByAccountAndTimeRange(ctx context.Context, accountID int64, startTime, endTime time.Time) ([]model.UsageLog, *pagination.PaginationResult, error)
+	ListByModelAndTimeRange(ctx context.Context, modelName string, startTime, endTime time.Time) ([]model.UsageLog, *pagination.PaginationResult, error)
+
+	GetAccountWindowStats(ctx context.Context, accountID int64, startTime time.Time) (*usagestats.AccountStats, error)
+	GetAccountTodayStats(ctx context.Context, accountID int64) (*usagestats.AccountStats, error)
+}

backend/internal/service/ports/user.go

+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+)
+
+type UserRepository interface {
+	Create(ctx context.Context, user *model.User) error
+	GetByID(ctx context.Context, id int64) (*model.User, error)
+	GetByEmail(ctx context.Context, email string) (*model.User, error)
+	Update(ctx context.Context, user *model.User) error
+	Delete(ctx context.Context, id int64) error
+
+	List(ctx context.Context, params pagination.PaginationParams) ([]model.User, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, status, role, search string) ([]model.User, *pagination.PaginationResult, error)
+
+	UpdateBalance(ctx context.Context, id int64, amount float64) error
+	DeductBalance(ctx context.Context, id int64, amount float64) error
+	UpdateConcurrency(ctx context.Context, id int64, amount int) error
+	ExistsByEmail(ctx context.Context, email string) (bool, error)
+	RemoveGroupFromAllowedGroups(ctx context.Context, groupID int64) (int64, error)
+}

backend/internal/service/ports/user_subscription.go

+package ports
+
+import (
+	"context"
+	"time"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+)
+
+type UserSubscriptionRepository interface {
+	Create(ctx context.Context, sub *model.UserSubscription) error
+	GetByID(ctx context.Context, id int64) (*model.UserSubscription, error)
+	GetByUserIDAndGroupID(ctx context.Context, userID, groupID int64) (*model.UserSubscription, error)
+	GetActiveByUserIDAndGroupID(ctx context.Context, userID, groupID int64) (*model.UserSubscription, error)
+	Update(ctx context.Context, sub *model.UserSubscription) error
+	Delete(ctx context.Context, id int64) error
+
+	ListByUserID(ctx context.Context, userID int64) ([]model.UserSubscription, error)
+	ListActiveByUserID(ctx context.Context, userID int64) ([]model.UserSubscription, error)
+	ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]model.UserSubscription, *pagination.PaginationResult, error)
+	List(ctx context.Context, params pagination.PaginationParams, userID, groupID *int64, status string) ([]model.UserSubscription, *pagination.PaginationResult, error)
+
+	ExistsByUserIDAndGroupID(ctx context.Context, userID, groupID int64) (bool, error)
+	ExtendExpiry(ctx context.Context, subscriptionID int64, newExpiresAt time.Time) error
+	UpdateStatus(ctx context.Context, subscriptionID int64, status string) error
+	UpdateNotes(ctx context.Context, subscriptionID int64, notes string) error
+
+	ActivateWindows(ctx context.Context, id int64, start time.Time) error
+	ResetDailyUsage(ctx context.Context, id int64, newWindowStart time.Time) error
+	ResetWeeklyUsage(ctx context.Context, id int64, newWindowStart time.Time) error
+	ResetMonthlyUsage(ctx context.Context, id int64, newWindowStart time.Time) error
+	IncrementUsage(ctx context.Context, id int64, costUSD float64) error
+
+	BatchUpdateExpiredStatus(ctx context.Context) (int64, error)
+}

backend/internal/service/proxy_service.go

@@ -5,7 +5,8 @@ import (
 	"errors"
 	"fmt"
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/pkg/pagination"
+	"sub2api/internal/service/ports"
 
 	"gorm.io/gorm"
 )
@@ -37,11 +38,11 @@ type UpdateProxyRequest struct {
 
 // ProxyService 代理管理服务
 type ProxyService struct {
-	proxyRepo *repository.ProxyRepository
+	proxyRepo ports.ProxyRepository
 }
 
 // NewProxyService 创建代理服务实例
-func NewProxyService(proxyRepo *repository.ProxyRepository) *ProxyService {
+func NewProxyService(proxyRepo ports.ProxyRepository) *ProxyService {
 	return &ProxyService{
 		proxyRepo: proxyRepo,
 	}
@@ -80,7 +81,7 @@ func (s *ProxyService) GetByID(ctx context.Context, id int64) (*model.Proxy, err
 }
 
 // List 获取代理列表
-func (s *ProxyService) List(ctx context.Context, params repository.PaginationParams) ([]model.Proxy, *repository.PaginationResult, error) {
+func (s *ProxyService) List(ctx context.Context, params pagination.PaginationParams) ([]model.Proxy, *pagination.PaginationResult, error) {
 	proxies, pagination, err := s.proxyRepo.List(ctx, params)
 	if err != nil {
 		return nil, nil, fmt.Errorf("list proxies: %w", err)

backend/internal/service/ratelimit_service.go

@@ -9,19 +9,19 @@ import (
 
 	"sub2api/internal/config"
 	"sub2api/internal/model"
-	"sub2api/internal/repository"
+	"sub2api/internal/service/ports"
 )
 
 // RateLimitService 处理限流和过载状态管理
 type RateLimitService struct {
-	repos *repository.Repositories
+	accountRepo ports.AccountRepository
 	cfg         *config.Config
 }
 
 // NewRateLimitService 创建RateLimitService实例
-func NewRateLimitService(repos *repository.Repositories, cfg *config.Config) *RateLimitService {
+func NewRateLimitService(accountRepo ports.AccountRepository, cfg *config.Config) *RateLimitService {
 	return &RateLimitService{
-		repos: repos,
+		accountRepo: accountRepo,
 		cfg:         cfg,
 	}
 }
@@ -62,7 +62,7 @@ func (s *RateLimitService) HandleUpstreamError(ctx context.Context, account *mod
 
 // handleAuthError 处理认证类错误(401/403)，停止账号调度
 func (s *RateLimitService) handleAuthError(ctx context.Context, account *model.Account, errorMsg string) {
-	if err := s.repos.Account.SetError(ctx, account.ID, errorMsg); err != nil {
+	if err := s.accountRepo.SetError(ctx, account.ID, errorMsg); err != nil {
 		log.Printf("SetError failed for account %d: %v", account.ID, err)
 		return
 	}
@@ -77,7 +77,7 @@ func (s *RateLimitService) handle429(ctx context.Context, account *model.Account
 	if resetTimestamp == "" {
 		// 没有重置时间，使用默认5分钟
 		resetAt := time.Now().Add(5 * time.Minute)
-		if err := s.repos.Account.SetRateLimited(ctx, account.ID, resetAt); err != nil {
+		if err := s.accountRepo.SetRateLimited(ctx, account.ID, resetAt); err != nil {
 			log.Printf("SetRateLimited failed for account %d: %v", account.ID, err)
 		}
 		return
@@ -88,7 +88,7 @@ func (s *RateLimitService) handle429(ctx context.Context, account *model.Account
 	if err != nil {
 		log.Printf("Parse reset timestamp failed: %v", err)
 		resetAt := time.Now().Add(5 * time.Minute)
-		if err := s.repos.Account.SetRateLimited(ctx, account.ID, resetAt); err != nil {
+		if err := s.accountRepo.SetRateLimited(ctx, account.ID, resetAt); err != nil {
 			log.Printf("SetRateLimited failed for account %d: %v", account.ID, err)
 		}
 		return
@@ -97,7 +97,7 @@ func (s *RateLimitService) handle429(ctx context.Context, account *model.Account
 	resetAt := time.Unix(ts, 0)
 
 	// 标记限流状态
-	if err := s.repos.Account.SetRateLimited(ctx, account.ID, resetAt); err != nil {
+	if err := s.accountRepo.SetRateLimited(ctx, account.ID, resetAt); err != nil {
 		log.Printf("SetRateLimited failed for account %d: %v", account.ID, err)
 		return
 	}
@@ -105,7 +105,7 @@ func (s *RateLimitService) handle429(ctx context.Context, account *model.Account
 	// 根据重置时间反推5h窗口
 	windowEnd := resetAt
 	windowStart := resetAt.Add(-5 * time.Hour)
-	if err := s.repos.Account.UpdateSessionWindow(ctx, account.ID, &windowStart, &windowEnd, "rejected"); err != nil {
+	if err := s.accountRepo.UpdateSessionWindow(ctx, account.ID, &windowStart, &windowEnd, "rejected"); err != nil {
 		log.Printf("UpdateSessionWindow failed for account %d: %v", account.ID, err)
 	}
 
@@ -121,7 +121,7 @@ func (s *RateLimitService) handle529(ctx context.Context, account *model.Account
 	}
 
 	until := time.Now().Add(time.Duration(cooldownMinutes) * time.Minute)
-	if err := s.repos.Account.SetOverloaded(ctx, account.ID, until); err != nil {
+	if err := s.accountRepo.SetOverloaded(ctx, account.ID, until); err != nil {
 		log.Printf("SetOverloaded failed for account %d: %v", account.ID, err)
 		return
 	}
@@ -152,13 +152,13 @@ func (s *RateLimitService) UpdateSessionWindow(ctx context.Context, account *mod
 		log.Printf("Account %d: initializing 5h window from %v to %v (status: %s)", account.ID, start, end, status)
 	}
 
-	if err := s.repos.Account.UpdateSessionWindow(ctx, account.ID, windowStart, windowEnd, status); err != nil {
+	if err := s.accountRepo.UpdateSessionWindow(ctx, account.ID, windowStart, windowEnd, status); err != nil {
 		log.Printf("UpdateSessionWindow failed for account %d: %v", account.ID, err)
 	}
 
 	// 如果状态为allowed且之前有限流，说明窗口已重置，清除限流状态
 	if status == "allowed" && account.IsRateLimited() {
-		if err := s.repos.Account.ClearRateLimit(ctx, account.ID); err != nil {
+		if err := s.accountRepo.ClearRateLimit(ctx, account.ID); err != nil {
 			log.Printf("ClearRateLimit failed for account %d: %v", account.ID, err)
 		}
 	}
@@ -166,5 +166,5 @@ func (s *RateLimitService) UpdateSessionWindow(ctx context.Context, account *mod
 
 // ClearRateLimit 清除账号的限流状态
 func (s *RateLimitService) ClearRateLimit(ctx context.Context, accountID int64) error {
-	return s.repos.Account.ClearRateLimit(ctx, accountID)
+	return s.accountRepo.ClearRateLimit(ctx, accountID)
 }