package server

import (
	"errors"
	"io"
	"time"
)

type ClientHandlers struct {
	// Server address to connect to.
	//
	// The address format depends on the underlying transport provided
	// by Client.Dial. The following transports are provided out of the box:
	//   * TCP - see NewTCPClient() and NewTCPServer().
	//   * TLS - see NewTLSClient() and NewTLSServer().
	//   * Unix sockets - see NewUnixClient() and NewUnixServer().
	//
	// By default TCP transport is used.
	Addr string

	// The maximum number of pending requests in the queue.
	//
	// The number of pending requsts should exceed the expected number
	// of concurrent goroutines calling client's methods.
	// Otherwise a lot of ClientError.Overflow errors may appear.
	//
	// Default is DefaultPendingMessages.
	PendingRequests int

	// Maximum request time.
	// Default value is DefaultRequestTimeout.
	RequestTimeout time.Duration

	// Size of send buffer per each underlying connection in bytes.
	// Default value is DefaultBufferSize.
	SendBufferSize int

	// Size of recv buffer per each underlying connection in bytes.
	// Default value is DefaultBufferSize.
	RecvBufferSize int

	KeepAlivePeriod time.Duration
}

func (ch *ClientHandlers) Dial() (conn io.ReadWriteCloser, err error) {
	return nil, errors.New("Client: Handler method[Dial] of Client is not implement")
}

func (ch *ClientHandlers) OnHandshake(remoteAddr string, rwc io.ReadWriteCloser) error {
	return nil
}

func (ch *ClientHandlers) Handle(rwc io.ReadWriteCloser, stopChan chan struct{}) {
	// no op
}

func (ch *ClientHandlers) GetAddr() string {
	return ch.Addr
}

func (ch *ClientHandlers) GetPendingRequests() int {
	return ch.PendingRequests
}

func (ch *ClientHandlers) GetRequestTimeout() time.Duration {
	return ch.RequestTimeout
}

func (ch *ClientHandlers) GetSendBufferSize() int {
	return ch.SendBufferSize
}

func (ch *ClientHandlers) GetRecvBufferSize() int {
	return ch.RecvBufferSize
}

func (ch *ClientHandlers) GetKeepAlivePeriod() time.Duration {
	return ch.KeepAlivePeriod
}

func (ch *ClientHandlers) Validate() {
	if ch.PendingRequests <= 0 {
		ch.PendingRequests = DefaultPendingMessages
	}
	if ch.RequestTimeout <= 0 {
		ch.RequestTimeout = DefaultRequestTimeout
	}
	if ch.SendBufferSize <= 0 {
		ch.SendBufferSize = DefaultBufferSize
	}
	if ch.RecvBufferSize <= 0 {
		ch.RecvBufferSize = DefaultBufferSize
	}
	if ch.KeepAlivePeriod <= 0 {
		ch.KeepAlivePeriod = DefaultKeepAlivePeriod
	}
}