/*
Copyright 2018 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package executor

import (
	"bytes"
	"io/ioutil"
	"net/http"
	"os"
	"testing"

	"github.com/GoogleContainerTools/kaniko/pkg/config"
	"github.com/GoogleContainerTools/kaniko/testutil"
	"github.com/google/go-containerregistry/pkg/v1/layout"
	"github.com/google/go-containerregistry/pkg/v1/random"
	"github.com/google/go-containerregistry/pkg/v1/validate"
)

func TestHeaderAdded(t *testing.T) {
	tests := []struct {
		name     string
		upstream string
		expected string
	}{{
		name:     "upstream env variable set",
		upstream: "skaffold-v0.25.45",
		expected: "kaniko/unset,skaffold-v0.25.45",
	}, {
		name:     "upstream env variable not set",
		expected: "kaniko/unset",
	},
	}
	for _, test := range tests {

		t.Run(test.name, func(t *testing.T) {
			rt := &withUserAgent{t: &mockRoundTripper{}}
			if test.upstream != "" {
				os.Setenv("UPSTREAM_CLIENT_TYPE", test.upstream)
				defer func() { os.Unsetenv("UPSTREAM_CLIENT_TYPE") }()
			}
			req, err := http.NewRequest("GET", "dummy", nil)
			if err != nil {
				t.Fatalf("culd not create a req due to %s", err)
			}
			resp, err := rt.RoundTrip(req)
			testutil.CheckError(t, false, err)
			defer resp.Body.Close()
			body, err := ioutil.ReadAll(resp.Body)
			testutil.CheckErrorAndDeepEqual(t, false, err, test.expected, string(body))
		})
	}

}

type mockRoundTripper struct {
}

func (m *mockRoundTripper) RoundTrip(r *http.Request) (*http.Response, error) {
	ua := r.UserAgent()
	return &http.Response{Body: ioutil.NopCloser(bytes.NewBufferString(ua))}, nil
}

func TestOCILayoutPath(t *testing.T) {
	tmpDir, err := ioutil.TempDir("", "")
	if err != nil {
		t.Fatalf("could not create temp dir: %s", err)
	}
	defer os.RemoveAll(tmpDir)

	image, err := random.Image(1024, 4)
	if err != nil {
		t.Fatalf("could not create image: %s", err)
	}

	digest, err := image.Digest()
	if err != nil {
		t.Fatalf("could not get image digest: %s", err)
	}

	want, err := image.Manifest()
	if err != nil {
		t.Fatalf("could not get image manifest: %s", err)
	}

	opts := config.KanikoOptions{
		NoPush:        true,
		OCILayoutPath: tmpDir,
	}

	if err := DoPush(image, &opts); err != nil {
		t.Fatalf("could not push image: %s", err)
	}

	layoutIndex, err := layout.ImageIndexFromPath(tmpDir)
	if err != nil {
		t.Fatalf("could not get index from layout: %s", err)
	}
	testutil.CheckError(t, false, validate.Index(layoutIndex))

	layoutImage, err := layoutIndex.Image(digest)
	if err != nil {
		t.Fatalf("could not get image from layout: %s", err)
	}

	got, err := layoutImage.Manifest()
	testutil.CheckErrorAndDeepEqual(t, false, err, want, got)
}