/*
	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 model

import (
	"fmt"
	"github.com/openziti/foundation/v2/errorz"
	"github.com/openziti/storage/boltz"
	"github.com/openziti/ziti/controller/db"
	"github.com/openziti/ziti/controller/models"
	"go.etcd.io/bbolt"
	"time"
)

type Service struct {
	models.BaseEntity
	Name               string        `json:"name"`
	MaxIdleTime        time.Duration `json:"maxIdleTime"`
	TerminatorStrategy string        `json:"terminatorStrategy"`
	RoleAttributes     []string      `json:"roleAttributes"`
	Configs            []string      `json:"configs"`
	EncryptionRequired bool          `json:"encryptionRequired"`
}

func (entity *Service) toBoltEntity(tx *bbolt.Tx, env Env) (*db.EdgeService, error) {
	if err := entity.validateConfigs(tx, env); err != nil {
		return nil, err
	}

	edgeService := &db.EdgeService{
		Service: db.Service{
			BaseExtEntity:      *boltz.NewExtEntity(entity.Id, entity.Tags),
			Name:               entity.Name,
			MaxIdleTime:        entity.MaxIdleTime,
			TerminatorStrategy: entity.TerminatorStrategy,
		},
		RoleAttributes:     entity.RoleAttributes,
		Configs:            entity.Configs,
		EncryptionRequired: entity.EncryptionRequired,
	}
	return edgeService, nil
}

func (entity *Service) toBoltEntityForCreate(tx *bbolt.Tx, env Env) (*db.EdgeService, error) {
	return entity.toBoltEntity(tx, env)
}

func (entity *Service) validateConfigs(tx *bbolt.Tx, env Env) error {
	typeMap := map[string]*db.Config{}
	configStore := env.GetStores().Config
	for _, id := range entity.Configs {
		config, _ := configStore.LoadById(tx, id)
		if config == nil {
			return boltz.NewNotFoundError(db.EntityTypeConfigs, "id", id)
		}
		conflictConfig, found := typeMap[config.Type]
		if found {
			configTypeName := "<not found>"
			if configType, _ := env.GetStores().ConfigType.LoadById(tx, config.Type); configType != nil {
				configTypeName = configType.Name
			}
			msg := fmt.Sprintf("duplicate configs named %v and %v found for config type %v. Only one config of a given typed is allowed per service ",
				conflictConfig.Name, config.Name, configTypeName)
			return errorz.NewFieldError(msg, "configs", entity.Configs)
		}
		typeMap[config.Type] = config
	}
	return nil
}

func (entity *Service) toBoltEntityForUpdate(tx *bbolt.Tx, env Env, _ boltz.FieldChecker) (*db.EdgeService, error) {
	return entity.toBoltEntity(tx, env)
}

func (entity *Service) fillFrom(_ Env, _ *bbolt.Tx, boltService *db.EdgeService) error {
	entity.FillCommon(boltService)
	entity.Name = boltService.Name
	entity.TerminatorStrategy = boltService.TerminatorStrategy
	entity.RoleAttributes = boltService.RoleAttributes
	entity.Configs = boltService.Configs
	entity.EncryptionRequired = boltService.EncryptionRequired
	return nil
}

type ServiceDetail struct {
	models.BaseEntity
	Name               string                            `json:"name"`
	MaxIdleTime        time.Duration                     `json:"maxIdleTime"`
	TerminatorStrategy string                            `json:"terminatorStrategy"`
	RoleAttributes     []string                          `json:"roleAttributes"`
	Permissions        []string                          `json:"permissions"`
	Configs            []string                          `json:"configs"`
	Config             map[string]map[string]interface{} `json:"config"`
	EncryptionRequired bool                              `json:"encryptionRequired"`
}

func (entity *ServiceDetail) toBoltEntityForCreate(*bbolt.Tx, Env) (*db.EdgeService, error) {
	panic("should never be called")
}

func (entity *ServiceDetail) toBoltEntityForUpdate(*bbolt.Tx, Env, boltz.FieldChecker) (*db.EdgeService, error) {
	panic("should never be called")
}

func (entity *ServiceDetail) fillFrom(_ Env, _ *bbolt.Tx, boltService *db.EdgeService) error {
	entity.FillCommon(boltService)
	entity.MaxIdleTime = boltService.MaxIdleTime
	entity.Name = boltService.Name
	entity.TerminatorStrategy = boltService.TerminatorStrategy
	entity.RoleAttributes = boltService.RoleAttributes
	entity.Configs = boltService.Configs
	entity.EncryptionRequired = boltService.EncryptionRequired

	return nil
}