// 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
//
//     http://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.
//
// Author: wsfuyibing <682805@qq.com>
// Date: 2024-07-31

package src

import (
	"context"
)

// Service
// is a top level component used to operate database.
type Service struct {
	key     string
	session *Session
}

// Master
// returns a shared master session of a connection.
func (o *Service) Master(ctx context.Context) (*Session, error) {
	if o.session != nil {
		return o.session, nil
	}
	return Config.GetMaster(ctx, o.key)
}

// Slave
// returns a shared slave session of a connection.
func (o *Service) Slave(ctx context.Context) (*Session, error) {
	if o.session != nil {
		return o.session, nil
	}
	return Config.GetSlave(ctx, o.key)
}

// With
// set a shared session of a connection on a service.
func (o *Service) With(sessions ...*Session) {
	if len(sessions) > 0 && sessions[0] != nil {
		o.session = sessions[0]
	}
}

// WithKey
// specify a connection key in your mapping.
func (o *Service) WithKey(key string) {
	o.key = key
}