package net

import (
	"testing"
	"time"
)

// remoteAddrConn is a minimal Conn that also reports a peer address, so the
// Session.RemoteHost port-stripping contract can be tested without a socket.
type remoteAddrConn struct{ addr string }

func (c remoteAddrConn) ReadMessage() (string, error)     { return "", nil }
func (c remoteAddrConn) Write(b []byte) (int, error)      { return len(b), nil }
func (c remoteAddrConn) Close() error                     { return nil }
func (c remoteAddrConn) SetWriteDeadline(time.Time) error { return nil }
func (c remoteAddrConn) SetReadDeadline(time.Time) error  { return nil }
func (c remoteAddrConn) SetEcho(bool) error               { return nil }
func (c remoteAddrConn) RemoteAddr() string               { return c.addr }

// TestSessionRemoteHostStripsPort: login throttling keys on the client host,
// so RemoteHost must drop the ephemeral source port (RemoteAddr keeps it).
// Keying on the raw address would let a reconnect reset the limiter.
func TestSessionRemoteHostStripsPort(t *testing.T) {
	for _, tc := range []struct{ in, want string }{
		{"203.0.113.7:54321", "203.0.113.7"},
		{"[2001:db8::1]:443", "2001:db8::1"},
		{"203.0.113.7", "203.0.113.7"},
		{"", ""},
	} {
		sess := &Session{Conn: remoteAddrConn{addr: tc.in}}
		if got := sess.RemoteHost(); got != tc.want {
			t.Fatalf("RemoteHost(%q) = %q, want %q", tc.in, got, tc.want)
		}
	}
}