package consul

import (
	"io/ioutil"
	"os"
	"reflect"
	"testing"

	"github.com/hashicorp/consul/consul/structs"
)

// Testing for GH-300 and GH-279
func TestHealthCheckRace(t *testing.T) {
	path, err := ioutil.TempDir("", "fsm")
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	fsm, err := NewFSM(path, os.Stderr)
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	defer fsm.Close()
	state := fsm.State()

	req := structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			ID:      "db",
			Service: "db",
		},
		Check: &structs.HealthCheck{
			Node:      "foo",
			CheckID:   "db",
			Name:      "db connectivity",
			Status:    structs.HealthPassing,
			ServiceID: "db",
		},
	}
	buf, err := structs.Encode(structs.RegisterRequestType, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	log := makeLog(buf)
	log.Index = 10
	resp := fsm.Apply(log)
	if resp != nil {
		t.Fatalf("resp: %v", resp)
	}

	// Verify the index
	idx, out1 := state.CheckServiceNodes("db")
	if idx != 10 {
		t.Fatalf("Bad index")
	}

	// Update the check state
	req.Check.Status = structs.HealthCritical
	buf, err = structs.Encode(structs.RegisterRequestType, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	log = makeLog(buf)
	log.Index = 20
	resp = fsm.Apply(log)
	if resp != nil {
		t.Fatalf("resp: %v", resp)
	}

	// Verify the index changed
	idx, out2 := state.CheckServiceNodes("db")
	if idx != 20 {
		t.Fatalf("Bad index")
	}

	if reflect.DeepEqual(out1, out2) {
		t.Fatalf("match: %#v %#v", *out1[0].Checks[0], *out2[0].Checks[0])
	}
}