package cluster

import (
	"gitee.com/wuzheng0709/backend-gopkg/infrastructure/pkg/aria2/common"
	"gitee.com/wuzheng0709/backend-gopkg/infrastructure/pkg/auth"
	model "gitee.com/wuzheng0709/backend-gopkg/infrastructure/pkg/models"
	"gitee.com/wuzheng0709/backend-gopkg/infrastructure/pkg/serializer"
)

type Node interface {
	// Init a node from database model
	Init(node *model.Node)

	// Check if given feature is enabled
	IsFeatureEnabled(feature string) bool

	// Subscribe node status change to a callback function
	SubscribeStatusChange(callback func(isActive bool, id uint))

	// Ping the node
	Ping(req *serializer.NodePingReq) (*serializer.NodePingResp, error)

	// Returns if the node is active
	IsActive() bool

	// Get instances for aria2 calls
	GetAria2Instance() common.Aria2

	// Returns unique id of this node
	ID() uint

	// Kill node and recycle resources
	Kill()

	// Returns if current node is master node
	IsMater() bool

	// Get auth instance used to check RPC call from slave to master
	MasterAuthInstance() auth.Auth

	// Get auth instance used to check RPC call from master to slave
	SlaveAuthInstance() auth.Auth

	// Get node DB model
	DBModel() *model.Node
}

// Create new node from DB model
func NewNodeFromDBModel(node *model.Node) Node {
	switch node.Type {
	case model.SlaveNodeType:
		slave := &SlaveNode{}
		slave.Init(node)
		return slave
	default:
		master := &MasterNode{}
		master.Init(node)
		return master
	}
}