package netutil

import (
	"errors"
	"io"
	"net"
	"syscall"

	"git.maze.io/maze/conduit/logger"
)

type ConnCloser struct {
	net.Conn
	Closer func() error
}

func (c *ConnCloser) Close() error {
	if c.Closer == nil {
		return c.Conn.Close()
	}
	return c.Closer()
}

// IsClosing checks if the error is because the connection was closed.
func IsClosing(err error) bool {
	if errors.Is(err, io.EOF) || errors.Is(err, io.ErrClosedPipe) || errors.Is(err, syscall.ECONNRESET) {
		return true
	}
	if err, ok := err.(net.Error); ok && err.Timeout() {
		return true
	}
	if err, ok := err.(*net.OpError); ok && err.Op == "close" {
		return true
	}
	logger.Debugf("not a closing error %T: %#+v", err, err)
	return false
}