package agent

import (
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"testing"

	"github.com/hashicorp/consul/testutil"
	"github.com/mitchellh/cli"
)

func TestCommand_implements(t *testing.T) {
	var _ cli.Command = new(Command)
}

func TestValidDatacenter(t *testing.T) {
	shouldMatch := []string{
		"dc1",
		"east-aws-001",
		"PROD_aws01-small",
	}
	noMatch := []string{
		"east.aws",
		"east!aws",
		"first,second",
	}
	for _, m := range shouldMatch {
		if !validDatacenter.MatchString(m) {
			t.Fatalf("expected match: %s", m)
		}
	}
	for _, m := range noMatch {
		if validDatacenter.MatchString(m) {
			t.Fatalf("expected no match: %s", m)
		}
	}
}

func TestRetryJoin(t *testing.T) {
	dir, agent := makeAgent(t, nextConfig())
	defer os.RemoveAll(dir)
	defer agent.Shutdown()

	conf2 := nextConfig()
	tmpDir, err := ioutil.TempDir("", "consul")
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	defer os.RemoveAll(tmpDir)

	doneCh := make(chan struct{})
	shutdownCh := make(chan struct{})

	defer func() {
		close(shutdownCh)
		<-doneCh
	}()

	cmd := &Command{
		ShutdownCh: shutdownCh,
		Ui:         new(cli.MockUi),
	}

	serfAddr := fmt.Sprintf(
		"%s:%d",
		agent.config.BindAddr,
		agent.config.Ports.SerfLan)

	args := []string{
		"-data-dir", tmpDir,
		"-node", conf2.NodeName,
		"-retry-join", serfAddr,
		"-retry-interval", "1s",
	}

	go func() {
		if code := cmd.Run(args); code != 0 {
			log.Printf("bad: %d", code)
		}
		close(doneCh)
	}()

	testutil.WaitForResult(func() (bool, error) {
		mem := agent.LANMembers()
		if len(mem) != 2 {
			return false, fmt.Errorf("bad: %#v", mem)
		}
		return true, nil
	}, func(err error) {
		t.Fatalf(err.Error())
	})
}

func TestRetryJoinFail(t *testing.T) {
	conf := nextConfig()
	tmpDir, err := ioutil.TempDir("", "consul")
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	defer os.RemoveAll(tmpDir)

	shutdownCh := make(chan struct{})
	defer close(shutdownCh)

	cmd := &Command{
		ShutdownCh: shutdownCh,
		Ui:         new(cli.MockUi),
	}

	serfAddr := fmt.Sprintf("%s:%d", conf.BindAddr, conf.Ports.SerfLan)

	args := []string{
		"-data-dir", tmpDir,
		"-retry-join", serfAddr,
		"-retry-max", "1",
	}

	if code := cmd.Run(args); code == 0 {
		t.Fatalf("bad: %d", code)
	}
}