package repository

import (
	"context"
	"time"
)

// CacheRepository 快取 Repository 介面
type CacheRepository interface {
	// Get 取得快取
	Get(ctx context.Context, key string) (string, error)

	// Set 設定快取
	Set(ctx context.Context, key, value string, ttl time.Duration) error

	// Delete 刪除快取
	Delete(ctx context.Context, keys ...string) error

	// Exists 檢查快取是否存在
	Exists(ctx context.Context, key string) (bool, error)

	// GetObject 取得物件快取
	GetObject(ctx context.Context, key string, dest interface{}) error

	// SetObject 設定物件快取
	SetObject(ctx context.Context, key string, value interface{}, ttl time.Duration) error

	// DeletePattern 根據模式刪除快取
	DeletePattern(ctx context.Context, pattern string) error
}

// Cache Keys 定義
const (
	// 權限樹快取 key
	CacheKeyPermissionTree = "permission:tree"

	// 使用者權限快取 key: user:permission:{uid}
	CacheKeyUserPermissionPrefix = "user:permission:"

	// 角色權限快取 key: role:permission:{role_uid}
	CacheKeyRolePermissionPrefix = "role:permission:"

	// 角色策略快取 key: role:policy:{role_id}
	CacheKeyRolePolicyPrefix = "role:policy:"

	// 權限列表快取 key
	CacheKeyPermissionList = "permission:list:active"
)

// CacheKeyUserPermission 使用者權限快取 key
func CacheKeyUserPermission(uid string) string {
	return CacheKeyUserPermissionPrefix + uid
}

// CacheKeyRolePermission 角色權限快取 key
func CacheKeyRolePermission(roleUID string) string {
	return CacheKeyRolePermissionPrefix + roleUID
}

// CacheKeyRolePolicy 角色策略快取 key
func CacheKeyRolePolicy(roleID int64) string {
	return CacheKeyRolePolicyPrefix + string(rune(roleID))
}