package server

import (
	"fmt"
	"net"
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestIsPublishableApp(t *testing.T) {
	s := &Server{}
	appName := "go_v2.web.1"
	if !s.IsPublishableApp(appName) {
		t.Errorf("%s should be publishable", appName)
	}
	badAppName := "go_v2"
	if s.IsPublishableApp(badAppName) {
		t.Errorf("%s should not be publishable", badAppName)
	}
	// publisher assumes that an app name of "test" with a null etcd client has v3 running
	oldVersion := "ceci-nest-pas-une-app_v2.web.1"
	if s.IsPublishableApp(oldVersion) {
		t.Errorf("%s should not be publishable", oldVersion)
	}
	currentVersion := "ceci-nest-pas-une-app_v3.web.1"
	if !s.IsPublishableApp(currentVersion) {
		t.Errorf("%s should be publishable", currentVersion)
	}
	futureVersion := "ceci-nest-pas-une-app_v4.web.1"
	if !s.IsPublishableApp(futureVersion) {
		t.Errorf("%s should be publishable", futureVersion)
	}
}

func TestIsPortOpen(t *testing.T) {
	ln, err := net.Listen("tcp4", "127.0.0.1:0")
	if err != nil {
		t.Fatalf("Listen failed: %v", err)
	}
	defer ln.Close()

	s := &Server{}
	if !s.IsPortOpen(ln.Addr().String()) {
		t.Errorf("Port should be open")
	}
	if s.IsPortOpen("127.0.0.1:-1") {
		t.Errorf("Port should be closed")
	}
}

func TestHealthCheckOK(t *testing.T) {
	s := &Server{}

	// good server
	ts1 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintln(w, "Hello, client")
	}))
	defer ts1.Close()
	if !s.HealthCheckOK(ts1.URL, 0, 0) {
		t.Errorf("healthcheck should be OK")
	}

	// bad server
	ts2 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.NotFound(w, r)
	}))
	defer ts2.Close()
	if s.HealthCheckOK(ts2.URL, 0, 0) {
		t.Errorf("healthcheck should be NOT OK")
	}
}