package events

import (
	"fmt"
	serverevents "git.apihub24.de/admin/server_events/v2"
)

func withSameUserName(context serverevents.IContext) func(context serverevents.IContext) bool {
	return serverevents.CreateMetaDataFilter(context, func(c serverevents.IContext) string {
		userName, _ := serverevents.MetadataAs[string](context, "UserName")
		return userName
	}, func(a string, b string) bool {
		return a == b
	})
}

type greeting struct {
	Message string
}

type greeterEventHandler struct{}

func (handler greeterEventHandler) CanExecute(context serverevents.IContext) bool {
	return true
}

func (handler greeterEventHandler) Handle(context serverevents.IContext, data any) {
	userName, ok := serverevents.ValueAs[string](data)
	if !ok || len(userName) < 1 {
		userName = "Anonymous"
	}
	context.Dispatch("greet", greeting{
		Message: fmt.Sprintf("Hello, %s", userName),
	}, withSameUserName(context))
}

func NewGreeterEventHandler() serverevents.IEventHandler {
	return &greeterEventHandler{}
}