/*
Copyright 2019 The Tekton Authors

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 v1_test

import (
	"context"
	"testing"
	"time"

	"github.com/google/go-cmp/cmp"
	"github.com/google/go-cmp/cmp/cmpopts"
	"github.com/tektoncd/pipeline/pkg/apis/config"
	cfgtesting "github.com/tektoncd/pipeline/pkg/apis/config/testing"
	"github.com/tektoncd/pipeline/pkg/apis/pipeline/pod"
	v1 "github.com/tektoncd/pipeline/pkg/apis/pipeline/v1"
	"github.com/tektoncd/pipeline/test/diff"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"knative.dev/pkg/apis"
)

var (
	ignoreUnexportedResources = cmpopts.IgnoreUnexported()
	ttrue                     = true
)

func TestTaskRunSpec_SetDefaults(t *testing.T) {
	cases := []struct {
		desc string
		trs  *v1.TaskRunSpec
		want *v1.TaskRunSpec
	}{{
		desc: "taskref is nil",
		trs: &v1.TaskRunSpec{
			TaskRef: nil,
			Timeout: &metav1.Duration{Duration: 500 * time.Millisecond},
		},
		want: &v1.TaskRunSpec{
			TaskRef:            nil,
			ServiceAccountName: config.DefaultServiceAccountValue,
			Timeout:            &metav1.Duration{Duration: 500 * time.Millisecond},
		},
	}, {
		desc: "taskref kind is empty",
		trs: &v1.TaskRunSpec{
			TaskRef: &v1.TaskRef{},
			Timeout: &metav1.Duration{Duration: 500 * time.Millisecond},
		},
		want: &v1.TaskRunSpec{
			TaskRef:            &v1.TaskRef{Kind: v1.NamespacedTaskKind},
			ServiceAccountName: config.DefaultServiceAccountValue,
			Timeout:            &metav1.Duration{Duration: 500 * time.Millisecond},
		},
	}, {
		desc: "pod template is nil",
		trs:  &v1.TaskRunSpec{},
		want: &v1.TaskRunSpec{
			ServiceAccountName: config.DefaultServiceAccountValue,
			Timeout:            &metav1.Duration{Duration: config.DefaultTimeoutMinutes * time.Minute},
		},
	}, {
		desc: "pod template is not nil",
		trs: &v1.TaskRunSpec{
			PodTemplate: &pod.Template{
				NodeSelector: map[string]string{
					"label": "value",
				},
			},
		},
		want: &v1.TaskRunSpec{
			ServiceAccountName: config.DefaultServiceAccountValue,
			Timeout:            &metav1.Duration{Duration: config.DefaultTimeoutMinutes * time.Minute},
			PodTemplate: &pod.Template{
				NodeSelector: map[string]string{
					"label": "value",
				},
			},
		},
	}, {
		desc: "embedded taskSpec",
		trs: &v1.TaskRunSpec{
			TaskSpec: &v1.TaskSpec{
				Params: []v1.ParamSpec{{
					Name: "param-name",
				}},
			},
		},
		want: &v1.TaskRunSpec{
			TaskSpec: &v1.TaskSpec{
				Params: []v1.ParamSpec{{
					Name: "param-name",
					Type: v1.ParamTypeString,
				}},
			},
			ServiceAccountName: config.DefaultServiceAccountValue,
			Timeout:            &metav1.Duration{Duration: config.DefaultTimeoutMinutes * time.Minute},
		},
	}}
	for _, tc := range cases {
		t.Run(tc.desc, func(t *testing.T) {
			ctx := context.Background()
			tc.trs.SetDefaults(ctx)

			if d := cmp.Diff(tc.want, tc.trs); d != "" {
				t.Errorf("Mismatch of TaskRunSpec: %s", diff.PrintWantGot(d))
			}
		})
	}
}

func TestTaskRunDefaulting(t *testing.T) {
	tests := []struct {
		name     string
		in       *v1.TaskRun
		want     *v1.TaskRun
		defaults map[string]string
	}{{
		name: "empty no context",
		in:   &v1.TaskRun{},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				ServiceAccountName: config.DefaultServiceAccountValue,
				Timeout:            &metav1.Duration{Duration: config.DefaultTimeoutMinutes * time.Minute},
			},
		},
	}, {
		name: "TaskRef default to namespace kind",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				ServiceAccountName: config.DefaultServiceAccountValue,
				Timeout:            &metav1.Duration{Duration: config.DefaultTimeoutMinutes * time.Minute},
			},
		},
	}, {
		name: "TaskRef default config context",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				ServiceAccountName: config.DefaultServiceAccountValue,
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				Timeout:            &metav1.Duration{Duration: 5 * time.Minute},
			},
		},
		defaults: map[string]string{
			"default-timeout-minutes": "5",
		},
	}, {
		name: "TaskRef default config context with SA",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				Timeout:            &metav1.Duration{Duration: 5 * time.Minute},
				ServiceAccountName: "tekton",
			},
		},
		defaults: map[string]string{
			"default-timeout-minutes": "5",
			"default-service-account": "tekton",
		},
	}, {
		name: "TaskRun managed-by set in config",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "something-else"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				ServiceAccountName: config.DefaultServiceAccountValue,
				Timeout:            &metav1.Duration{Duration: 5 * time.Minute},
			},
		},
		defaults: map[string]string{
			"default-timeout-minutes":        "5",
			"default-managed-by-label-value": "something-else",
		},
	}, {
		name: "TaskRun managed-by set in request and config (request wins)",
		in: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "user-specified"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "user-specified"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				ServiceAccountName: config.DefaultServiceAccountValue,
				Timeout:            &metav1.Duration{Duration: 5 * time.Minute},
			},
		},
		defaults: map[string]string{
			"default-timeout-minutes":        "5",
			"default-managed-by-label-value": "something-else",
		},
	}, {
		name: "TaskRef pod template is coming from default config pod template",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				Timeout:            &metav1.Duration{Duration: 5 * time.Minute},
				ServiceAccountName: "tekton",
				PodTemplate: &pod.Template{
					NodeSelector: map[string]string{
						"label": "value",
					},
				},
			},
		},
		defaults: map[string]string{
			"default-timeout-minutes": "5",
			"default-service-account": "tekton",
			"default-pod-template":    "nodeSelector: { 'label': 'value' }",
		},
	}, {
		name: "TaskRef pod template NodeSelector takes precedence over default config pod template NodeSelector",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
				PodTemplate: &pod.Template{
					NodeSelector: map[string]string{
						"label2": "value2",
					},
				},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				Timeout:            &metav1.Duration{Duration: 5 * time.Minute},
				ServiceAccountName: "tekton",
				PodTemplate: &pod.Template{
					NodeSelector: map[string]string{
						"label2": "value2",
					},
				},
			},
		},
		defaults: map[string]string{
			"default-timeout-minutes": "5",
			"default-service-account": "tekton",
			"default-pod-template":    "nodeSelector: { 'label': 'value' }",
		},
	}, {
		name: "TaskRef pod template merges non competing fields with default config pod template",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{Name: "foo"},
				PodTemplate: &pod.Template{
					SecurityContext: &corev1.PodSecurityContext{
						RunAsNonRoot: &ttrue,
					},
				},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef:            &v1.TaskRef{Name: "foo", Kind: v1.NamespacedTaskKind},
				Timeout:            &metav1.Duration{Duration: 5 * time.Minute},
				ServiceAccountName: "tekton",
				PodTemplate: &pod.Template{
					NodeSelector: map[string]string{
						"label": "value",
					},
					SecurityContext: &corev1.PodSecurityContext{
						RunAsNonRoot: &ttrue,
					},
				},
			},
		},
		defaults: map[string]string{
			"default-timeout-minutes": "5",
			"default-service-account": "tekton",
			"default-pod-template":    "nodeSelector: { 'label': 'value' }",
		},
	}, {
		name: "TaskRef with default resolver",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{
					ResolverRef: v1.ResolverRef{
						Resolver: "git",
					},
				},
				Timeout:            &metav1.Duration{Duration: time.Hour},
				ServiceAccountName: "default",
			},
		},
		defaults: map[string]string{
			"default-resolver-type": "git",
		},
	}, {
		name: "TaskRef user-provided resolver overwrites default resolver",
		in: &v1.TaskRun{
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{
					ResolverRef: v1.ResolverRef{
						Resolver: "custom resolver",
					},
				},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels: map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{
					ResolverRef: v1.ResolverRef{
						Resolver: "custom resolver",
					},
				},
				Timeout:            &metav1.Duration{Duration: time.Hour},
				ServiceAccountName: "default",
			},
		},
		defaults: map[string]string{
			"default-resolver-type": "git",
		},
	}, {
		name: "Reserved Tekton annotations are not filtered on updates",
		in: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Annotations: map[string]string{"chains.tekton.dev/signed": "true", "foo": "bar"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{
					Name: "foo",
				},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels:      map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
				Annotations: map[string]string{"chains.tekton.dev/signed": "true", "foo": "bar"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{
					Kind: "Task",
					Name: "foo",
				},
				Timeout:            &metav1.Duration{Duration: time.Hour},
				ServiceAccountName: "default",
			},
		},
	}}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			ctx := cfgtesting.SetDefaults(context.Background(), t, tc.defaults)
			got := tc.in
			got.SetDefaults(ctx)
			if !cmp.Equal(got, tc.want, ignoreUnexportedResources) {
				d := cmp.Diff(tc.want, got, ignoreUnexportedResources)
				t.Errorf("SetDefaults %s", diff.PrintWantGot(d))
			}
		})
	}
}

func TestTaskRunDefaultingOnCreate(t *testing.T) {
	tests := []struct {
		name     string
		in       *v1.TaskRun
		want     *v1.TaskRun
		defaults map[string]string
	}{{
		name: "Reserved Tekton annotations are filtered on create",
		in: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Annotations: map[string]string{"chains.tekton.dev/signed": "true", "results.tekton.dev/hello": "world", "tekton.dev/foo": "bar", "foo": "bar"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{
					Name: "foo",
				},
			},
		},
		want: &v1.TaskRun{
			ObjectMeta: metav1.ObjectMeta{
				Labels:      map[string]string{"app.kubernetes.io/managed-by": "tekton-pipelines"},
				Annotations: map[string]string{"results.tekton.dev/hello": "world", "tekton.dev/foo": "bar", "foo": "bar"},
			},
			Spec: v1.TaskRunSpec{
				TaskRef: &v1.TaskRef{
					Kind: "Task",
					Name: "foo",
				},
				Timeout:            &metav1.Duration{Duration: time.Hour},
				ServiceAccountName: "default",
			},
		},
	}}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			ctx := apis.WithinCreate(cfgtesting.SetDefaults(context.Background(), t, tc.defaults))
			got := tc.in
			got.SetDefaults(ctx)
			if !cmp.Equal(got, tc.want, ignoreUnexportedResources) {
				d := cmp.Diff(tc.want, got, ignoreUnexportedResources)
				t.Errorf("SetDefaults %s", diff.PrintWantGot(d))
			}
		})
	}
}
