//
// Copyright (C) 2024 veypi <i@veypi.com>
// 2025-02-14 16:08:06
// Distributed under terms of the MIT license.
//

package auth

import (
	"context"
	"errors"
	"fmt"
	"regexp"
	"strings"
	"time"

	"github.com/veypi/vbase/cfg"
	"github.com/veypi/vbase/libs/cache"
	"github.com/veypi/vbase/models"
	"github.com/veypi/vigo"
	"github.com/veypi/vigo/contrib/event"
	"gorm.io/gorm"
)

const (
	// CtxKeyUserID 用户ID上下文键
	CtxKeyUserID = "auth:user_id"
	// CtxKeyOrgID 组织ID上下文键
	CtxKeyOrgID = "auth:org_id"
	// CtxKeyOrgRoles 组织角色上下文键
	CtxKeyOrgRoles = "auth:org_roles"

	// RoleCodeAdmin 管理员角色代码
	RoleCodeAdmin = "admin"
	// RoleCodeUser 普通用户角色代码
	RoleCodeUser = "user"
)

// ========== 辅助函数 ==========
func GetUserID(x *vigo.X) string {
	if userID, ok := x.Get(CtxKeyUserID).(string); ok {
		return userID
	}
	return ""
}

func GetOrgID(x *vigo.X) string {
	if orgID, ok := x.Get(CtxKeyOrgID).(string); ok {
		return orgID
	}
	return ""
}

func GetOrgRoles(x *vigo.X) []string {
	if roles, ok := x.Get(CtxKeyOrgRoles).([]string); ok {
		return roles
	}
	return nil
}

// Auth 权限管理接口
type Auth interface {
	UserID(x *vigo.X) string
	OrgID(x *vigo.X) string
	// 加载组织信息 (中间件/手动调用)
	LoadOrg(x *vigo.X) error

	// ========== 中间件生成 ==========
	// 基础权限检查
	Perm(permissionID string) func(*vigo.X) error

	// 特定资源权限检查 (自动从 Path/Query 获取资源ID)
	PermOnResource(permissionID, resourceKey string) func(*vigo.X) error

	// 满足任一权限
	PermAny(permissionIDs ...string) func(*vigo.X) error

	// 满足所有权限
	PermAll(permissionIDs ...string) func(*vigo.X) error

	// ========== 角色管理 ==========
	// 添加角色定义
	// policies 格式: "resource:action"，例如 "user:read", "*:*"
	AddRole(roleCode, roleName string, policies ...string) error

	// ========== 权限管理 ==========
	// 授予角色
	GrantRole(ctx context.Context, userID, orgID, roleCode string) error

	// 撤销角色
	RevokeRole(ctx context.Context, userID, orgID, roleCode string) error

	// 授予特定资源权限
	GrantResourcePerm(ctx context.Context, userID, orgID, permissionID, resourceID string) error

	// 撤销特定资源权限
	RevokeResourcePerm(ctx context.Context, userID, orgID, permissionID, resourceID string) error

	// 撤销用户所有权限
	RevokeAll(ctx context.Context, userID, orgID string) error

	// ========== 权限查询 ==========
	// 检查权限
	CheckPermission(ctx context.Context, userID, orgID, permissionID, resourceID string) bool
	CheckPerm(ctx context.Context, userID, orgID, permissionID, resourceID string) bool

	// 列出用户权限
	ListUserPermissions(ctx context.Context, userID, orgID string) ([]models.UserPermissionResult, error)

	// 列出资源授权用户
	ListResourceUsers(ctx context.Context, orgID, permissionID, resourceID string) ([]models.ResourceUser, error)
}

// 全局 Auth 工厂
var Factory = &authFactory{
	apps: make(map[string]*appAuth),
}

// VBaseAuth vbase 自身的权限管理实例
// 由 vbase 包在初始化时注入
var VBaseAuth = Factory.New("vb")

func init() {
	// 为 VBaseAuth 添加默认角色

	VBaseAuth.AddRole(RoleCodeAdmin, "管理员", "*:*")
	VBaseAuth.AddRole(RoleCodeUser, "普通用户",
		"org:create",
		"org:read",
		"oauth-client:read",
		"oauth-client:create",
		"oauth-client:update",
		"oauth-client:delete",
	)

	// 注册权限初始化回调到 cfg 包
	// 这样 models.InitDB() 可以在合适的时机调用，避免循环依赖
	event.Add("vb.init.auth", Factory.init)
}

type authFactory struct {
	apps map[string]*appAuth // appKey -> auth实例
}

// New 创建权限管理实例（注册权限域）
func (f *authFactory) New(scope string) Auth {
	if _, exists := f.apps[scope]; exists {
		return f.apps[scope]
	}

	auth := &appAuth{
		scope:        scope,
		roleDefs:     make(map[string]roleDefinition),
		policies:     make(map[string][][2]string),
		roleInitDone: make(map[string]bool),
	}
	f.apps[scope] = auth
	return auth
}

var validResourceRegex = regexp.MustCompile(`^[a-zA-Z][a-zA-Z0-9_-]*$`)

func validatePermissionID(permissionID string) {
	if permissionID == "*:*" {
		return
	}
	parts := strings.Split(permissionID, ":")
	// 允许 app:resource:action 或 resource:action 格式
	// 如果是 app:resource:action，则 parts 长度为 3
	// 如果是 resource:action，则 parts 长度为 2
	if len(parts) != 2 && len(parts) != 3 {
		panic(fmt.Sprintf("invalid permission format: %s, expected 'resource:action' or 'app:resource:action'", permissionID))
	}

	resource := parts[len(parts)-2]
	if !validResourceRegex.MatchString(resource) {
		panic(fmt.Sprintf("invalid resource identifier: %s, must start with letter and contain only letters, numbers, '-' or '_'", resource))
	}
}

// Init 初始化所有注册的权限配置
// - 检查不同 app 之间是否有冲突
// - 同步 Permission 到数据库
// - 建立预设角色
func (f *authFactory) init() error {
	for appKey, auth := range f.apps {
		if err := auth.init(); err != nil {
			return fmt.Errorf("failed to init auth for %s: %w", appKey, err)
		}
	}

	return nil
}

// roleDefinition 角色定义（内部使用）
type roleDefinition struct {
	code        string
	name        string
	description string
	policies    []string // 权限列表: ["resource:action", "*:*"]
}

// appAuth 单个权限域的权限管理
type appAuth struct {
	scope        string                    // 权限域标识
	roleDefs     map[string]roleDefinition // roleCode -> role definition
	policies     map[string][][2]string    // roleCode -> list of [resource, action] pairs
	roleInitDone map[string]bool           // roleCode -> whether role is initialized in DB
}

// AddRole 添加角色定义
// policies 格式: "resource:action"，例如 "user:read", "*:*"
func (a *appAuth) AddRole(roleCode, roleName string, policies ...string) error {
	if roleCode == "" || roleName == "" {
		return fmt.Errorf("role code and name cannot be empty")
	}

	// 解析并验证权限格式
	parsedPolicies := make([][2]string, 0, len(policies))
	for _, policy := range policies {
		// 严格检查格式: resource:action
		parts := strings.Split(policy, ":")
		if len(parts) != 2 {
			return fmt.Errorf("invalid policy format: %s, expected 'resource:action'", policy)
		}
		resource, action := parts[0], parts[1]

		// 验证 resource 和 action 不为空
		if resource == "" || action == "" {
			return fmt.Errorf("resource and action cannot be empty in policy: %s", policy)
		}

		// 验证 resource 格式（如果不是通配符）
		if resource != "*" {
			if !validResourceRegex.MatchString(resource) {
				return fmt.Errorf("invalid resource identifier: %s in policy: %s, must start with letter and contain only letters, numbers, '-' or '_'", resource, policy)
			}
		}

		// 验证 action 格式（如果不是通配符）
		if action != "*" {
			if !validResourceRegex.MatchString(action) {
				return fmt.Errorf("invalid action identifier: %s in policy: %s, must start with letter and contain only letters, numbers, '-' or '_'", action, policy)
			}
		}

		parsedPolicies = append(parsedPolicies, [2]string{resource, action})
	}

	// 存储角色定义
	a.roleDefs[roleCode] = roleDefinition{
		code: roleCode,
		name: roleName,
	}
	a.policies[roleCode] = parsedPolicies

	// 如果已经初始化过，立即同步到数据库
	if len(a.roleInitDone) > 0 {
		return a.initRole(roleCode)
	}

	return nil
}

// init 初始化应用的权限配置
func (a *appAuth) init() error {
	// 1. 同步权限定义到数据库
	for _, permDef := range a.extractPermissions() {
		var perm models.Permission
		err := cfg.DB().Where("id = ?", permDef.ID).First(&perm).Error
		if err != nil {
			// 不存在则创建
			perm = permDef
			if err := cfg.DB().Create(&perm).Error; err != nil {
				return fmt.Errorf("failed to create permission %s: %w", permDef.ID, err)
			}
		}
	}

	// 2. 创建系统预设角色（跳过 _app_info）
	for roleCode := range a.roleDefs {
		if roleCode == "_app_info" {
			continue
		}
		if err := a.initRole(roleCode); err != nil {
			return err
		}
	}

	return nil
}

// extractPermissions 从角色定义中提取所有权限
func (a *appAuth) extractPermissions() []models.Permission {
	permMap := make(map[string]models.Permission)

	for roleCode, policies := range a.policies {
		if roleCode == "_app_info" {
			continue
		}
		for _, policy := range policies {
			resource, action := policy[0], policy[1]
			// 跳过通配符权限的特殊处理
			if resource == "*" && action == "*" {
				continue
			}
			permID := fmt.Sprintf("%s:%s:%s", a.scope, resource, action)

			if _, exists := permMap[permID]; !exists {
				permMap[permID] = models.Permission{
					ID:          permID,
					Scope:       a.scope,
					Resource:    resource,
					Action:      action,
					Description: fmt.Sprintf("%s %s on %s", a.scope, action, resource),
				}
			}
		}
	}

	result := make([]models.Permission, 0, len(permMap))
	for _, perm := range permMap {
		result = append(result, perm)
	}
	return result
}

// initRole 初始化系统预设角色
func (a *appAuth) initRole(roleCode string) error {
	roleDef, exists := a.roleDefs[roleCode]
	if !exists {
		return fmt.Errorf("role not found: %s", roleCode)
	}
	policies, hasPolicies := a.policies[roleCode]
	if !hasPolicies {
		policies = [][2]string{}
	}

	// 查找或创建系统角色
	var role models.Role
	err := cfg.DB().Where("code = ? AND org_id IS NULL", roleDef.code).First(&role).Error
	if err != nil {
		// 创建新角色
		role = models.Role{
			OrgID:       nil,
			Code:        roleDef.code,
			Name:        roleDef.name,
			Description: roleDef.description,
			IsSystem:    true,
			Status:      1,
		}
		if err := cfg.DB().Create(&role).Error; err != nil {
			return fmt.Errorf("failed to create role %s: %w", roleDef.code, err)
		}
	}

	// 同步角色权限
	hasWildcard := false
	for _, policy := range policies {
		resource, action := policy[0], policy[1]
		// 处理通配符权限
		if resource == "*" && action == "*" {
			hasWildcard = true
			continue
		}
		permID := fmt.Sprintf("%s:%s:%s", a.scope, resource, action)

		// 检查关联是否存在
		var count int64
		cfg.DB().Model(&models.RolePermission{}).
			Where("role_id = ? AND permission_id = ?", role.ID, permID).
			Count(&count)

		if count == 0 {
			rp := models.RolePermission{
				RoleID:       role.ID,
				PermissionID: permID,
				Condition:    "none",
			}
			if err := cfg.DB().Create(&rp).Error; err != nil {
				return fmt.Errorf("failed to create role permission: %w", err)
			}
		}
	}

	// 为通配符权限创建记录
	if hasWildcard {
		wildcardPermID := fmt.Sprintf("%s:*:*", a.scope)

		// 先确保通配符 permission 存在
		var perm models.Permission
		err := cfg.DB().Where("id = ?", wildcardPermID).First(&perm).Error
		if err != nil {
			// 创建通配符 permission
			perm = models.Permission{
				ID:          wildcardPermID,
				Scope:       a.scope,
				Resource:    "*",
				Action:      "*",
				Description: fmt.Sprintf("%s wildcard permission", a.scope),
			}
			if err := cfg.DB().Create(&perm).Error; err != nil {
				return fmt.Errorf("failed to create wildcard permission: %w", err)
			}
		}

		// 创建 role_permission 关联
		var count int64
		cfg.DB().Model(&models.RolePermission{}).
			Where("role_id = ? AND permission_id = ?", role.ID, wildcardPermID).
			Count(&count)
		if count == 0 {
			rp := models.RolePermission{
				RoleID:       role.ID,
				PermissionID: wildcardPermID,
				Condition:    "none",
			}
			if err := cfg.DB().Create(&rp).Error; err != nil {
				return fmt.Errorf("failed to create wildcard role permission: %w", err)
			}
		}
	}

	a.roleInitDone[roleCode] = true
	return nil
}

// ========== 中间件实现 ==========

func (a *appAuth) UserID(x *vigo.X) string {
	return GetUserID(x)
}

func (a *appAuth) OrgID(x *vigo.X) string {
	return GetOrgID(x)
}

func (a *appAuth) LoadOrg(x *vigo.X) error {
	orgID := x.Request.Header.Get("X-Org-ID")
	if orgID == "" {
		orgID = x.Request.URL.Query().Get("org_id")
	}
	if orgID == "" {
		orgID = x.PathParams.Get("org_id")
	}

	if orgID == "" {
		// 没有指定组织
		return vigo.ErrInvalidArg.WithString("missing org_id")
	}

	userID := GetUserID(x)
	if userID == "" {
		return vigo.ErrUnauthorized
	}

	// 检查用户是否为组织成员
	var member models.OrgMember
	err := cfg.DB().Where("user_id = ? AND org_id = ? AND status = ?", userID, orgID, models.MemberStatusActive).First(&member).Error
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return vigo.ErrForbidden.WithString("not a member of this organization")
		}
		return vigo.ErrInternalServer.WithError(err)
	}

	x.Set(CtxKeyOrgID, orgID)
	return nil
}

func (a *appAuth) Perm(permissionID string) func(*vigo.X) error {
	validatePermissionID(permissionID)
	return func(x *vigo.X) error {
		userID := GetUserID(x)
		if userID == "" {
			return vigo.ErrUnauthorized
		}

		orgID := GetOrgID(x)
		if err := a.checkPermission(x.Context(), userID, orgID, permissionID, ""); err != nil {
			return err
		}
		return nil
	}
}

// PermOnResource 检查当前用户对特定资源实例是否有指定权限 (ACL)
//
// 鉴权逻辑:
// 1. 全局权限检查: 如果用户拥有全局权限 (如 "user:*", "*:*")，直接通过。
// 2. 实例权限检查: 检查 user_permissions 表中是否有 (permissionID, resourceID) 的记录。
//
// 最佳实践:
// - 配合 GrantResourcePerm 使用: 在创建资源时，必须显式赋予创建者权限。
// - 适用于高价值、需共享的资源 (如 User, Org, Project)。
// - 对于私有/高频资源 (如 Order, Log)，建议使用 Manual Check (在业务逻辑中直接检查 OwnerID)。
func (a *appAuth) PermOnResource(permissionID, resourceKey string) func(*vigo.X) error {
	validatePermissionID(permissionID)
	return func(x *vigo.X) error {
		userID := GetUserID(x)
		if userID == "" {
			return vigo.ErrUnauthorized
		}

		orgID := GetOrgID(x)

		// 尝试从 PathParams 获取
		resourceID := x.PathParams.Get(resourceKey)
		if resourceID == "" {
			// 尝试从 Query 获取
			resourceID = x.Request.URL.Query().Get(resourceKey)
		}

		if err := a.checkPermission(x.Context(), userID, orgID, permissionID, resourceID); err != nil {
			return err
		}
		return nil
	}
}

// 内部辅助检查方法，返回 error 以便于统一处理错误响应
func (a *appAuth) checkPermission(ctx context.Context, userID, orgID, permissionID, resourceID string) error {
	ok, err := a.checkPermissionDB(ctx, userID, orgID, permissionID, resourceID)
	if err != nil {
		return vigo.ErrInternalServer.WithError(err)
	}
	if !ok {
		return vigo.ErrForbidden
	}
	return nil
}

func (a *appAuth) PermAny(permissionIDs ...string) func(*vigo.X) error {
	for _, pid := range permissionIDs {
		validatePermissionID(pid)
	}
	return func(x *vigo.X) error {
		userID := GetUserID(x)
		if userID == "" {
			return vigo.ErrUnauthorized
		}
		orgID := GetOrgID(x)

		for _, pid := range permissionIDs {
			if err := a.checkPermission(x.Context(), userID, orgID, pid, ""); err == nil {
				return nil
			}
		}
		return vigo.ErrNoPermission
	}
}

func (a *appAuth) PermAll(permissionIDs ...string) func(*vigo.X) error {
	for _, pid := range permissionIDs {
		validatePermissionID(pid)
	}
	return func(x *vigo.X) error {
		userID := GetUserID(x)
		if userID == "" {
			return vigo.ErrUnauthorized
		}
		orgID := GetOrgID(x)

		for _, pid := range permissionIDs {
			if err := a.checkPermission(x.Context(), userID, orgID, pid, ""); err != nil {
				return err
			}
		}
		return nil
	}
}

// ========== 权限管理实现 ==========

func (a *appAuth) GrantRole(ctx context.Context, userID, orgID, roleCode string) error {
	// 查找角色
	var role models.Role
	query := cfg.DB().Where("code = ?", roleCode)
	if orgID != "" {
		query = query.Where("org_id = ?", orgID)
	} else {
		query = query.Where("org_id IS NULL")
	}

	if err := query.First(&role).Error; err != nil {
		// 如果指定了 OrgID 但没找到，尝试查找全局角色
		if orgID != "" {
			query = cfg.DB().Where("code = ? AND org_id IS NULL", roleCode)
			if err := query.First(&role).Error; err != nil {
				return fmt.Errorf("role not found: %s", roleCode)
			}
		} else {
			return fmt.Errorf("role not found: %s", roleCode)
		}
	}

	// 检查是否已存在
	var count int64
	roleQuery := cfg.DB().Model(&models.UserRole{}).
		Where("user_id = ? AND role_id = ?", userID, role.ID)
	if orgID != "" {
		roleQuery = roleQuery.Where("org_id = ?", orgID)
	} else {
		roleQuery = roleQuery.Where("org_id IS NULL")
	}
	roleQuery.Count(&count)

	if count > 0 {
		return nil // 已存在
	}

	var orgIDPtr *string
	if orgID != "" {
		orgIDPtr = &orgID
	}
	userRole := models.UserRole{
		UserID:   userID,
		OrgID:    orgIDPtr,
		RoleID:   role.ID,
		ExpireAt: nil, // 默认不过期
	}

	if err := cfg.DB().Create(&userRole).Error; err != nil {
		return err
	}
	incUserPermVersion(userID)
	return nil
}

func (a *appAuth) RevokeRole(ctx context.Context, userID, orgID, roleCode string) error {
	var role models.Role
	// 优先查找组织特定角色
	query := cfg.DB().Where("code = ?", roleCode)
	if orgID != "" {
		query = query.Where("org_id = ?", orgID)
	} else {
		query = query.Where("org_id IS NULL")
	}

	if err := query.First(&role).Error; err != nil {
		// 如果没找到，尝试查找全局角色
		if orgID != "" {
			if err := cfg.DB().Where("code = ? AND org_id IS NULL", roleCode).First(&role).Error; err != nil {
				return nil // 角色不存在，无需撤销
			}
		} else {
			return nil
		}
	}

	// 构建删除条件
	deleteQuery := cfg.DB().Where("user_id = ? AND role_id = ?", userID, role.ID)
	if orgID != "" {
		deleteQuery = deleteQuery.Where("org_id = ?", orgID)
	} else {
		deleteQuery = deleteQuery.Where("org_id IS NULL")
	}
	if err := deleteQuery.Delete(&models.UserRole{}).Error; err != nil {
		return err
	}
	incUserPermVersion(userID)
	return nil
}

func (a *appAuth) GrantResourcePerm(ctx context.Context, userID, orgID, permissionID, resourceID string) error {
	if strings.Count(permissionID, ":") == 1 {
		permissionID = fmt.Sprintf("%s:%s", a.scope, permissionID)
	}
	// 检查权限是否存在
	var perm models.Permission
	if err := cfg.DB().Where("id = ?", permissionID).First(&perm).Error; err != nil {
		return fmt.Errorf("permission not found: %s", permissionID)
	}

	// 检查是否已存在
	var existing models.UserPermission
	query := cfg.DB().Where("user_id = ? AND permission_id = ? AND resource_id = ?",
		userID, permissionID, resourceID)
	if orgID != "" {
		query = query.Where("org_id = ?", orgID)
	} else {
		query = query.Where("org_id IS NULL")
	}
	err := query.First(&existing).Error

	if err == nil {
		// 已存在
		return nil
	}

	var orgIDPtr *string
	if orgID != "" {
		orgIDPtr = &orgID
	}
	userPerm := models.UserPermission{
		UserID:       userID,
		OrgID:        orgIDPtr,
		PermissionID: permissionID,
		ResourceID:   resourceID,
		ExpireAt:     nil, // 默认不过期
		GrantedBy:    "",  // 默认空
	}

	if err := cfg.DB().Create(&userPerm).Error; err != nil {
		return err
	}
	incUserPermVersion(userID)
	return nil
}

func (a *appAuth) RevokeResourcePerm(ctx context.Context, userID, orgID, permissionID, resourceID string) error {
	if strings.Count(permissionID, ":") == 1 {
		permissionID = fmt.Sprintf("%s:%s", a.scope, permissionID)
	}
	query := cfg.DB().Where("user_id = ? AND permission_id = ? AND resource_id = ?",
		userID, permissionID, resourceID)
	if orgID != "" {
		query = query.Where("org_id = ?", orgID)
	} else {
		query = query.Where("org_id IS NULL")
	}
	if err := query.Delete(&models.UserPermission{}).Error; err != nil {
		return err
	}
	incUserPermVersion(userID)
	return nil
}

func (a *appAuth) RevokeAll(ctx context.Context, userID, orgID string) error {
	// 删除用户角色
	roleQuery := cfg.DB().Where("user_id = ?", userID)
	if orgID != "" {
		roleQuery = roleQuery.Where("org_id = ?", orgID)
	} else {
		roleQuery = roleQuery.Where("org_id IS NULL")
	}
	if err := roleQuery.Delete(&models.UserRole{}).Error; err != nil {
		return err
	}

	// 删除用户特定权限
	permQuery := cfg.DB().Where("user_id = ?", userID)
	if orgID != "" {
		permQuery = permQuery.Where("org_id = ?", orgID)
	} else {
		permQuery = permQuery.Where("org_id IS NULL")
	}
	if err := permQuery.Delete(&models.UserPermission{}).Error; err != nil {
		return err
	}

	incUserPermVersion(userID)
	return nil
}

// ========== 权限查询实现 ==========

func (a *appAuth) CheckPermission(ctx context.Context, userID, orgID, permissionID, resourceID string) bool {
	ok, _ := a.checkPermissionDB(ctx, userID, orgID, permissionID, resourceID)
	return ok
}

func (a *appAuth) CheckPerm(ctx context.Context, userID, orgID, permissionID, resourceID string) bool {
	return a.CheckPermission(ctx, userID, orgID, permissionID, resourceID)
}

func (a *appAuth) checkPermissionDB(ctx context.Context, userID, orgID, permissionID, resourceID string) (bool, error) {
	// 1. 检查用户是否有该权限的角色（包括当前组织角色和系统全局角色）
	var roleIDs []string
	roleQuery := cfg.DB().Model(&models.UserRole{}).
		Where("user_id = ? AND (expire_at IS NULL OR expire_at > ?)", userID, time.Now())

	if orgID != "" {
		roleQuery = roleQuery.Where("org_id = ? OR org_id IS NULL", orgID)
	} else {
		roleQuery = roleQuery.Where("org_id IS NULL")
	}

	if err := roleQuery.Pluck("role_id", &roleIDs).Error; err != nil {
		return false, err
	}

	if len(roleIDs) > 0 {
		// 构造可能的通配符权限ID
		permsToCheck := []string{permissionID}
		parts := strings.Split(permissionID, ":")
		if len(parts) == 3 {
			// app:resource:*
			permsToCheck = append(permsToCheck, fmt.Sprintf("%s:%s:*", parts[0], parts[1]))
			// app:*:*
			permsToCheck = append(permsToCheck, fmt.Sprintf("%s:*:*", parts[0]))
		} else if len(parts) == 2 {
			// resource:action -> appKey:resource:action
			fullPermID := fmt.Sprintf("%s:%s", a.scope, permissionID)
			permsToCheck = append(permsToCheck, fullPermID)
			permsToCheck = append(permsToCheck, fmt.Sprintf("%s:%s:*", a.scope, parts[0]))
			permsToCheck = append(permsToCheck, fmt.Sprintf("%s:*:*", a.scope))
		}

		// 检查这些角色是否有所需权限
		var count int64
		if err := cfg.DB().Model(&models.RolePermission{}).
			Where("role_id IN ? AND permission_id IN ?", roleIDs, permsToCheck).
			Count(&count).Error; err != nil {
			return false, err
		}
		if count > 0 {
			return true, nil
		}
	}

	// 2. 检查用户是否有特定的资源权限
	// 构造可能的通配符权限ID (同上)
	permsToCheck := []string{permissionID}
	parts := strings.Split(permissionID, ":")
	if len(parts) == 3 {
		permsToCheck = append(permsToCheck, fmt.Sprintf("%s:%s:*", parts[0], parts[1]))
		permsToCheck = append(permsToCheck, fmt.Sprintf("%s:*:*", parts[0]))
	} else if len(parts) == 2 {
		// resource:action -> appKey:resource:action
		fullPermID := fmt.Sprintf("%s:%s", a.scope, permissionID)
		permsToCheck = append(permsToCheck, fullPermID)
		permsToCheck = append(permsToCheck, fmt.Sprintf("%s:%s:*", a.scope, parts[0]))
		permsToCheck = append(permsToCheck, fmt.Sprintf("%s:*:*", a.scope))
	}

	var userPermCount int64
	query := cfg.DB().Model(&models.UserPermission{}).
		Where("user_id = ? AND permission_id IN ? AND (expire_at IS NULL OR expire_at > ?)",
			userID, permsToCheck, time.Now())

	if orgID != "" {
		query = query.Where("org_id = ?", orgID)
	} else {
		query = query.Where("org_id IS NULL")
	}

	if resourceID != "" {
		query = query.Where("resource_id = ? OR resource_id = '*'", resourceID)
	} else {
		query = query.Where("resource_id = '*'")
	}

	if err := query.Count(&userPermCount).Error; err != nil {
		return false, err
	}

	return userPermCount > 0, nil
}

func (a *appAuth) ListUserPermissions(ctx context.Context, userID, orgID string) ([]models.UserPermissionResult, error) {
	result := make([]models.UserPermissionResult, 0)

	// 1. 获取用户角色对应的权限
	var roleIDs []string
	if err := cfg.DB().Model(&models.UserRole{}).
		Where("user_id = ? AND org_id = ? AND (expire_at IS NULL OR expire_at > ?)",
			userID, orgID, time.Now()).
		Pluck("role_id", &roleIDs).Error; err != nil {
		return nil, err
	}

	if len(roleIDs) > 0 {
		var permIDs []string
		if err := cfg.DB().Model(&models.RolePermission{}).
			Where("role_id IN ?", roleIDs).
			Pluck("permission_id", &permIDs).Error; err != nil {
			return nil, err
		}

		for _, permID := range permIDs {
			result = append(result, models.UserPermissionResult{
				PermissionID: permID,
				ResourceID:   "*",
				Actions:      []string{"*"},
			})
		}
	}

	// 2. 获取用户特定资源权限
	var userPerms []models.UserPermission
	if err := cfg.DB().Where("user_id = ? AND org_id = ? AND (expire_at IS NULL OR expire_at > ?)",
		userID, orgID, time.Now()).
		Find(&userPerms).Error; err != nil {
		return nil, err
	}

	for _, up := range userPerms {
		result = append(result, models.UserPermissionResult{
			PermissionID: up.PermissionID,
			ResourceID:   up.ResourceID,
			Actions:      []string{"*"},
		})
	}

	return result, nil
}

func (a *appAuth) ListResourceUsers(ctx context.Context, orgID, permissionID, resourceID string) ([]models.ResourceUser, error) {
	result := make([]models.ResourceUser, 0)

	// 查询有该资源权限的用户
	var userPerms []models.UserPermission
	query := cfg.DB().Where("org_id = ? AND permission_id = ?", orgID, permissionID)
	if resourceID != "" {
		query = query.Where("resource_id = ? OR resource_id = '*'", resourceID)
	}

	if err := query.Find(&userPerms).Error; err != nil {
		return nil, err
	}

	userMap := make(map[string][]string)
	for _, up := range userPerms {
		userMap[up.UserID] = append(userMap[up.UserID], "*")
	}

	for userID, actions := range userMap {
		result = append(result, models.ResourceUser{
			UserID:  userID,
			Actions: actions,
		})
	}

	return result, nil
}

// ========== 辅助方法 ==========

func (a *appAuth) isAdmin(ctx context.Context, userID, orgID string) (bool, error) {
	// 检查用户是否有管理员角色
	var adminRoleIDs []string
	if err := cfg.DB().Model(&models.Role{}).
		Where("code = ?", RoleCodeAdmin).
		Pluck("id", &adminRoleIDs).Error; err != nil {
		return false, err
	}

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

	var count int64
	if err := cfg.DB().Model(&models.UserRole{}).
		Where("user_id = ? AND org_id = ? AND role_id IN ?", userID, orgID, adminRoleIDs).
		Count(&count).Error; err != nil {
		return false, err
	}

	return count > 0, nil
}

// ========== Cache Helpers ==========

func getUserPermVersion(userID string) string {
	if !cache.IsEnabled() {
		return "0"
	}
	key := fmt.Sprintf("auth:user_ver:%s", userID)
	ver, err := cache.Client.Get(cache.Ctx, key).Result()
	if err != nil {
		return "0"
	}
	return ver
}

func incUserPermVersion(userID string) {
	if !cache.IsEnabled() {
		return
	}
	key := fmt.Sprintf("auth:user_ver:%s", userID)
	cache.Client.Incr(cache.Ctx, key)
}