package micro

import (
	"context"

	"git.nspix.com/golang/micro/gateway/http"
	"git.nspix.com/golang/micro/gateway/rpc"
	"git.nspix.com/golang/micro/registry"
)

const (
	EnvironmentDocker string = "docker"
	EnvironmentHost          = "host"
)

type (
	applicationKey struct {
	}

	HandleOptions struct {
		DisableRpc  bool   //禁用RPC功能
		DisableHttp bool   //禁用HTTP功能
		HttpPath    string //重定向HTTP路由
		HttpMethod  string //HTTP路径
	}

	HandleOption func(o *HandleOptions)

	HandleFunc func(ctx Context) (err error)

	Application interface {
		Node() *registry.ServiceNode                                                //获取节点信息
		HttpServe() *http.Server                                                    //获取HTTP实例
		RPCServe() *rpc.Server                                                      //获取RPC实例
		PeekService(name string) ([]*registry.ServiceNode, error)                   //选择一个服务
		Handle(method string, cb HandleFunc, opts ...HandleOption)                  //注册一个处理器
		NewRequest(name, method string, body interface{}) (req *Request, err error) //创建一个rpc请求
		Environment() string
	}

	Server interface {
		Start(ctx context.Context) (err error)
		Stop() (err error)
	}
)

var (
	contextKey = applicationKey{}
)

func FromContext(ctx context.Context) Application {
	if v := ctx.Value(contextKey); v != nil {
		return v.(Application)
	}
	return nil
}

func WithContext(ctx context.Context, app Application) context.Context {
	return context.WithValue(ctx, contextKey, app)
}