/*
	Copyright NetFoundry, Inc.

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	https://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.
*/

package persistence

import (
	"github.com/openziti/edge/eid"
	"github.com/openziti/foundation/storage/ast"
	"github.com/openziti/foundation/storage/boltz"
	"go.etcd.io/bbolt"
	"time"
)

const (
	FieldApiSessionIdentity       = "identity"
	FieldApiSessionToken          = "token"
	FieldApiSessionConfigTypes    = "configTypes"
	FieldApiSessionIPAddress      = "ipAddress"
	FieldApiSessionMfaComplete    = "mfaComplete"
	FieldApiSessionMfaRequired    = "mfaRequired"
	FieldApiSessionLastActivityAt = "lastActivityAt"
)

type ApiSession struct {
	boltz.BaseExtEntity
	IdentityId     string
	Token          string
	IPAddress      string
	ConfigTypes    []string
	MfaComplete    bool
	MfaRequired    bool
	LastActivityAt time.Time
}

func NewApiSession(identityId string) *ApiSession {
	return &ApiSession{
		BaseExtEntity: boltz.BaseExtEntity{Id: eid.New()},
		IdentityId:    identityId,
		Token:         eid.New(),
	}
}

func (entity *ApiSession) LoadValues(_ boltz.CrudStore, bucket *boltz.TypedBucket) {
	entity.LoadBaseValues(bucket)
	entity.IdentityId = bucket.GetStringOrError(FieldApiSessionIdentity)
	entity.Token = bucket.GetStringOrError(FieldApiSessionToken)
	entity.ConfigTypes = bucket.GetStringList(FieldApiSessionConfigTypes)
	entity.IPAddress = bucket.GetStringWithDefault(FieldApiSessionIPAddress, "")
	entity.MfaComplete = bucket.GetBoolWithDefault(FieldApiSessionMfaComplete, false)
	entity.MfaRequired = bucket.GetBoolWithDefault(FieldApiSessionMfaRequired, false)
	lastActivityAt := bucket.GetTime(FieldApiSessionLastActivityAt) //not orError due to migration v18

	if lastActivityAt != nil {
		entity.LastActivityAt = *lastActivityAt
	}
}

func (entity *ApiSession) SetValues(ctx *boltz.PersistContext) {
	entity.SetBaseValues(ctx)
	ctx.SetString(FieldApiSessionIdentity, entity.IdentityId)
	ctx.SetString(FieldApiSessionToken, entity.Token)
	ctx.SetStringList(FieldApiSessionConfigTypes, entity.ConfigTypes)
	ctx.SetString(FieldApiSessionIPAddress, entity.IPAddress)
	ctx.SetBool(FieldApiSessionMfaComplete, entity.MfaComplete)
	ctx.SetBool(FieldApiSessionMfaRequired, entity.MfaRequired)
	ctx.SetTimeP(FieldApiSessionLastActivityAt, &entity.LastActivityAt)
}

func (entity *ApiSession) GetEntityType() string {
	return EntityTypeApiSessions
}

type ApiSessionStore interface {
	Store
	LoadOneById(tx *bbolt.Tx, id string) (*ApiSession, error)
	LoadOneByToken(tx *bbolt.Tx, token string) (*ApiSession, error)
	LoadOneByQuery(tx *bbolt.Tx, query string) (*ApiSession, error)
	GetTokenIndex() boltz.ReadIndex
}

func newApiSessionStore(stores *stores) *apiSessionStoreImpl {
	store := &apiSessionStoreImpl{
		baseStore: newBaseStore(stores, EntityTypeApiSessions),
	}
	store.InitImpl(store)
	return store
}

type apiSessionStoreImpl struct {
	*baseStore

	indexToken     boltz.ReadIndex
	symbolIdentity boltz.EntitySymbol
}

func (store *apiSessionStoreImpl) NewStoreEntity() boltz.Entity {
	return &ApiSession{}
}

func (store *apiSessionStoreImpl) GetTokenIndex() boltz.ReadIndex {
	return store.indexToken
}

func (store *apiSessionStoreImpl) initializeLocal() {
	store.AddExtEntitySymbols()
	symbolToken := store.AddSymbol(FieldApiSessionToken, ast.NodeTypeString)
	store.indexToken = store.AddUniqueIndex(symbolToken)
	store.symbolIdentity = store.AddFkSymbol(FieldApiSessionIdentity, store.stores.identity)
	store.AddSymbol(FieldApiSessionLastActivityAt, ast.NodeTypeDatetime)

	store.AddFkConstraint(store.symbolIdentity, false, boltz.CascadeDelete)
}

func (store *apiSessionStoreImpl) initializeLinked() {
}

func (store *apiSessionStoreImpl) LoadOneById(tx *bbolt.Tx, id string) (*ApiSession, error) {
	entity := &ApiSession{}
	if err := store.baseLoadOneById(tx, id, entity); err != nil {
		return nil, err
	}
	return entity, nil
}

func (store *apiSessionStoreImpl) LoadOneByToken(tx *bbolt.Tx, token string) (*ApiSession, error) {
	id := store.indexToken.Read(tx, []byte(token))
	if id != nil {
		return store.LoadOneById(tx, string(id))
	}
	return nil, boltz.NewNotFoundError(store.GetSingularEntityType(), "token", token)
}

func (store *apiSessionStoreImpl) LoadOneByQuery(tx *bbolt.Tx, query string) (*ApiSession, error) {
	entity := &ApiSession{}
	if found, err := store.BaseLoadOneByQuery(tx, query, entity); !found || err != nil {
		return nil, err
	}
	return entity, nil
}

type UpdateLastActivityAtChecker struct{}

func (u UpdateLastActivityAtChecker) IsUpdated(field string) bool {
	return field == FieldApiSessionLastActivityAt
}