package mnet

import (
	"fmt"
	"io/ioutil"
	"net"
	. "testing"

	"github.com/mediocregopher/mediocre-go-lib/mcfg"
	"github.com/mediocregopher/mediocre-go-lib/mctx"
	"github.com/mediocregopher/mediocre-go-lib/mrun"
	"github.com/mediocregopher/mediocre-go-lib/mtest/massert"
)

func TestIsReservedIP(t *T) {
	assertReserved := func(ipStr string) massert.Assertion {
		ip := net.ParseIP(ipStr)
		if ip == nil {
			panic("ip:" + ipStr + " not valid")
		}
		return massert.Comment(massert.Equal(true, IsReservedIP(ip)),
			"ip:%q", ipStr)
	}

	massert.Fatal(t, massert.All(
		assertReserved("127.0.0.1"),
		assertReserved("::ffff:127.0.0.1"),
		assertReserved("192.168.40.50"),
		assertReserved("::1"),
		assertReserved("100::1"),
	))

	massert.Fatal(t, massert.None(
		assertReserved("8.8.8.8"),
		assertReserved("::ffff:8.8.8.8"),
		assertReserved("2600:1700:7580:6e80:21c:25ff:fe97:44df"),
	))
}

func TestMListen(t *T) {
	ctx := mctx.ChildOf(mctx.New(), "test")

	l := MListen(ctx, "", "")
	if err := mcfg.Populate(ctx, nil); err != nil {
		t.Fatal(err)
	} else if err := mrun.Start(ctx); err != nil {
		t.Fatal(err)
	}

	go func() {
		conn, err := net.Dial("tcp", l.Addr().String())
		if err != nil {
			t.Fatal(err)
		} else if _, err = fmt.Fprint(conn, "hello world"); err != nil {
			t.Fatal(err)
		}
		conn.Close()
	}()

	conn, err := l.Accept()
	if err != nil {
		t.Fatal(err)
	} else if b, err := ioutil.ReadAll(conn); err != nil {
		t.Fatal(err)
	} else if string(b) != "hello world" {
		t.Fatalf("read %q from conn", b)
	}

	if err := mrun.Stop(ctx); err != nil {
		t.Fatal(err)
	}
}