package watch

import (
	"os"
	"testing"
	"time"

	"github.com/armon/consul-api"
)

var consulAddr string

func init() {
	consulAddr = os.Getenv("CONSUL_ADDR")
}

func TestKeyWatch(t *testing.T) {
	if consulAddr == "" {
		t.Skip()
	}
	plan := mustParse(t, "type:key key:foo/bar/baz")
	invoke := 0
	plan.Handler = func(idx uint64, raw interface{}) {
		if invoke == 0 {
			if raw == nil {
				return
			}
			v, ok := raw.(*consulapi.KVPair)
			if !ok || v == nil || string(v.Value) != "test" {
				t.Fatalf("Bad: %#v", raw)
			}
			invoke++
		}
	}

	go func() {
		defer plan.Stop()
		time.Sleep(20 * time.Millisecond)

		kv := plan.client.KV()
		pair := &consulapi.KVPair{
			Key:   "foo/bar/baz",
			Value: []byte("test"),
		}
		_, err := kv.Put(pair, nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Wait for the query to run
		time.Sleep(20 * time.Millisecond)
		plan.Stop()

		// Delete the key
		_, err = kv.Delete("foo/bar/baz", nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
	}()

	err := plan.Run(consulAddr)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	if invoke == 0 {
		t.Fatalf("bad: %v", invoke)
	}
}

func TestKeyPrefixWatch(t *testing.T) {
	if consulAddr == "" {
		t.Skip()
	}
	plan := mustParse(t, "type:keyprefix prefix:foo/")
	invoke := 0
	plan.Handler = func(idx uint64, raw interface{}) {
		if invoke == 0 {
			if raw == nil {
				return
			}
			v, ok := raw.(consulapi.KVPairs)
			if ok && v == nil {
				return
			}
			if !ok || v == nil || string(v[0].Key) != "foo/bar" {
				t.Fatalf("Bad: %#v", raw)
			}
			invoke++
		}
	}

	go func() {
		defer plan.Stop()
		time.Sleep(20 * time.Millisecond)

		kv := plan.client.KV()
		pair := &consulapi.KVPair{
			Key: "foo/bar",
		}
		_, err := kv.Put(pair, nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Wait for the query to run
		time.Sleep(20 * time.Millisecond)
		plan.Stop()

		// Delete the key
		_, err = kv.Delete("foo/bar", nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
	}()

	err := plan.Run(consulAddr)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	if invoke == 0 {
		t.Fatalf("bad: %v", invoke)
	}
}

func TestServicesWatch(t *testing.T) {
	if consulAddr == "" {
		t.Skip()
	}
	plan := mustParse(t, "type:services")
	invoke := 0
	plan.Handler = func(idx uint64, raw interface{}) {
		if invoke == 0 {
			if raw == nil {
				return
			}
			v, ok := raw.(map[string][]string)
			if !ok || v["consul"] == nil {
				t.Fatalf("Bad: %#v", raw)
			}
			invoke++
		}
	}

	go func() {
		time.Sleep(20 * time.Millisecond)
		plan.Stop()

		agent := plan.client.Agent()
		reg := &consulapi.AgentServiceRegistration{
			ID:   "foo",
			Name: "foo",
		}
		agent.ServiceRegister(reg)
		time.Sleep(20 * time.Millisecond)
		agent.ServiceDeregister("foo")
	}()

	err := plan.Run(consulAddr)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	if invoke == 0 {
		t.Fatalf("bad: %v", invoke)
	}
}

func TestNodesWatch(t *testing.T) {
	if consulAddr == "" {
		t.Skip()
	}
	plan := mustParse(t, "type:nodes")
	invoke := 0
	plan.Handler = func(idx uint64, raw interface{}) {
		if invoke == 0 {
			if raw == nil {
				return
			}
			v, ok := raw.([]*consulapi.Node)
			if !ok || len(v) == 0 {
				t.Fatalf("Bad: %#v", raw)
			}
			invoke++
		}
	}

	go func() {
		time.Sleep(20 * time.Millisecond)
		plan.Stop()

		catalog := plan.client.Catalog()
		reg := &consulapi.CatalogRegistration{
			Node:       "foobar",
			Address:    "1.1.1.1",
			Datacenter: "dc1",
		}
		catalog.Register(reg, nil)
		time.Sleep(20 * time.Millisecond)
		dereg := &consulapi.CatalogDeregistration{
			Node:       "foobar",
			Address:    "1.1.1.1",
			Datacenter: "dc1",
		}
		catalog.Deregister(dereg, nil)
	}()

	err := plan.Run(consulAddr)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	if invoke == 0 {
		t.Fatalf("bad: %v", invoke)
	}
}

func TestServiceWatch(t *testing.T) {
	if consulAddr == "" {
		t.Skip()
	}
	plan := mustParse(t, "type:service service:foo tag:bar passingonly:true")
	invoke := 0
	plan.Handler = func(idx uint64, raw interface{}) {
		if invoke == 0 {
			if raw == nil {
				return
			}
			v, ok := raw.([]*consulapi.ServiceEntry)
			if ok && len(v) == 0 {
				return
			}
			if !ok || v[0].Service.ID != "foo" {
				t.Fatalf("Bad: %#v", raw)
			}
			invoke++
		}
	}

	go func() {
		time.Sleep(20 * time.Millisecond)

		agent := plan.client.Agent()
		reg := &consulapi.AgentServiceRegistration{
			ID:   "foo",
			Name: "foo",
			Tags: []string{"bar"},
		}
		agent.ServiceRegister(reg)

		time.Sleep(20 * time.Millisecond)
		plan.Stop()

		agent.ServiceDeregister("foo")
	}()

	err := plan.Run(consulAddr)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	if invoke == 0 {
		t.Fatalf("bad: %v", invoke)
	}
}