package consul

import (
	"github.com/hashicorp/consul/agent/structs"
)

var clientACLCacheConfig = &structs.ACLCachesConfig{
	// The ACL cache configuration on client agents is more conservative than
	// on the servers. It is assumed that individual client agents will have
	// fewer distinct identities accessing the client than a server would
	// and thus can put smaller limits on the amount of ACL caching done.
	//
	// Identities - number of identities/acl tokens that can be cached
	Identities: 1024,
	// Policies - number of unparsed ACL policies that can be cached
	Policies: 128,
	// ParsedPolicies - number of parsed ACL policies that can be cached
	ParsedPolicies: 128,
	// Authorizers - number of compiled multi-policy effective policies that can be cached
	Authorizers: 256,
	// Roles - number of ACL roles that can be cached
	Roles: 128,
}

type clientACLResolverBackend struct {
	// TODO: un-embed
	*Client
}

func (c *clientACLResolverBackend) ACLDatacenter() string {
	// For resolution running on clients servers within the current datacenter
	// must be queried first to pick up local tokens.
	return c.config.Datacenter
}

func (c *clientACLResolverBackend) ResolveIdentityFromToken(token string) (bool, structs.ACLIdentity, error) {
	// clients do no local identity resolution at the moment
	return false, nil, nil
}

func (c *clientACLResolverBackend) ResolvePolicyFromID(policyID string) (bool, *structs.ACLPolicy, error) {
	// clients do no local policy resolution at the moment
	return false, nil, nil
}

func (c *clientACLResolverBackend) ResolveRoleFromID(roleID string) (bool, *structs.ACLRole, error) {
	// clients do no local role resolution at the moment
	return false, nil, nil
}