package system // import "github.com/docker/docker/integration/system"

import (
	"net/http"
	"strings"
	"testing"

	"github.com/docker/docker/api/types/versions"
	"github.com/docker/docker/internal/test/request"
	"gotest.tools/assert"
	"gotest.tools/skip"
)

func TestPingCacheHeaders(t *testing.T) {
	defer setupTest(t)()

	res, _, err := request.Get("/_ping")
	assert.NilError(t, err)
	assert.Equal(t, res.StatusCode, http.StatusOK)

	assert.Equal(t, hdr(res, "Cache-Control"), "no-cache, no-store, must-revalidate")
	assert.Equal(t, hdr(res, "Pragma"), "no-cache")
}

func TestPingGet(t *testing.T) {
	defer setupTest(t)()

	res, body, err := request.Get("/_ping")
	assert.NilError(t, err)

	b, err := request.ReadBody(body)
	assert.NilError(t, err)
	assert.Equal(t, string(b), "OK")
	assert.Equal(t, res.StatusCode, http.StatusOK)
	assert.Check(t, hdr(res, "API-Version") != "")
}

func TestPingHead(t *testing.T) {
	skip.If(t, versions.LessThan(testEnv.DaemonAPIVersion(), "1.40"), "skip test from new feature")
	defer setupTest(t)()

	res, body, err := request.Head("/_ping")
	assert.NilError(t, err)

	b, err := request.ReadBody(body)
	assert.NilError(t, err)
	assert.Equal(t, 0, len(b))
	assert.Equal(t, res.StatusCode, http.StatusOK)
	assert.Check(t, hdr(res, "API-Version") != "")
}

func hdr(res *http.Response, name string) string {
	val, ok := res.Header[http.CanonicalHeaderKey(name)]
	if !ok || len(val) == 0 {
		return ""
	}
	return strings.Join(val, ", ")
}