package server

import "sync/atomic"

type ServerHandler interface {
	ConnectionHandler

	GetName() string
	ServerCtx() ServerCtx

	Init(serverCtx ServerCtx) error
	OnStart(serverCtx ServerCtx) error
	OnStop(serverCtx ServerCtx)
	Destroy(serverCtx ServerCtx)

	Validate() error
}

type ServerHandlers struct {
	ConnectionHandlers

	// Server name for sending in response headers.
	//
	// Default server name is used if left blank.
	Name string `json:"name,omitempty"`

	validated atomic.Value
}

func (sh *ServerHandlers) ServerCtx() ServerCtx {
	return NewServerCtx(nil)
}

func (sh *ServerHandlers) Init(serverCtx ServerCtx) error {
	return nil
}

func (sh *ServerHandlers) OnStart(serverCtx ServerCtx) error {
	return nil
}

func (sh *ServerHandlers) OnStop(serverCtx ServerCtx) {

}

func (sh *ServerHandlers) Destroy(serverCtx ServerCtx) {

}

func (sh *ServerHandlers) GetName() string {
	return sh.Name
}

func (sh *ServerHandlers) Validate() error {
	if nil != sh.validated.Load() {
		return nil
	}
	sh.validated.Store(true)

	if err := sh.ConnectionHandlers.Validate(); nil != err {
		return err
	}

	if "" == sh.Name {
		sh.Name = "Server"
	}

	return nil
}