package service

import (
	"reflect"
)

var (
	typeOfError   = reflect.TypeOf((*error)(nil)).Elem()
	typeOfBytes   = reflect.TypeOf(([]byte)(nil))
	typeOfSession = reflect.TypeOf(NewSession(nil))
)

// 方法检测
func isHandlerMethod(method reflect.Method) bool {
	mt := method.Type
	if method.PkgPath != "" {
		return false
	}
	if mt.NumIn() != 3 {
		return false
	}
	if mt.NumOut() != 2 {
		return false
	}
	if t1 := mt.In(1); t1.Kind() != reflect.Ptr || t1 != typeOfSession {
		return false
	}
	if (mt.In(2).Kind() != reflect.Ptr && mt.In(2) != typeOfBytes) || mt.Out(1) != typeOfError || mt.Out(0).Kind() != reflect.Ptr {
		return false
	}
	return true
}