/*
Copyright 2019 The Knative 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 v1alpha1

import (
	"context"
	"reflect"
	"testing"

	"github.com/google/go-cmp/cmp"
	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"knative.dev/pkg/apis"
	duckv1 "knative.dev/pkg/apis/duck/v1"
	duckv1alpha1 "knative.dev/pkg/apis/duck/v1alpha1"
	"knative.dev/pkg/tracker"
)

func TestSinkBindingGetGroupVersionKind(t *testing.T) {
	r := &SinkBinding{}
	want := schema.GroupVersionKind{
		Group:   "sources.eventing.knative.dev",
		Version: "v1alpha1",
		Kind:    "SinkBinding",
	}
	if got := r.GetGroupVersionKind(); got != want {
		t.Errorf("got: %v, want: %v", got, want)
	}
}

func TestSinkBindingGetters(t *testing.T) {
	r := &SinkBinding{
		Spec: SinkBindingSpec{
			BindingSpec: duckv1alpha1.BindingSpec{
				Subject: tracker.Reference{
					APIVersion: "foo",
				},
			},
		},
	}
	if got, want := r.GetUntypedSpec(), r.Spec; !reflect.DeepEqual(got, want) {
		t.Errorf("GetUntypedSpec() = %v, want: %v", got, want)
	}
	if got, want := r.GetSubject(), r.Spec.Subject; !reflect.DeepEqual(got, want) {
		t.Errorf("GetSubject() = %v, want: %v", got, want)
	}
	if got, want := r.GetBindingStatus(), &r.Status; !reflect.DeepEqual(got, want) {
		t.Errorf("GetBindingStatus() = %v, want: %v", got, want)
	}
}

func TestSinkBindingSetObsGen(t *testing.T) {
	r := &SinkBinding{
		Spec: SinkBindingSpec{
			BindingSpec: duckv1alpha1.BindingSpec{
				Subject: tracker.Reference{
					APIVersion: "foo",
				},
			},
		},
	}
	want := int64(3762)
	r.GetBindingStatus().SetObservedGeneration(want)
	if got := r.Status.ObservedGeneration; got != want {
		t.Errorf("SetObservedGeneration() = %d, wanted %d", got, want)
	}
}

func TestSinkBindingStatusIsReady(t *testing.T) {
	tests := []struct {
		name string
		s    *SinkBindingStatus
		want bool
	}{{
		name: "uninitialized",
		s:    &SinkBindingStatus{},
		want: false,
	}, {
		name: "initialized",
		s: func() *SinkBindingStatus {
			s := &SinkBindingStatus{}
			s.InitializeConditions()
			return s
		}(),
		want: false,
	}, {
		name: "mark available",
		s: func() *SinkBindingStatus {
			s := &SinkBindingStatus{}
			s.InitializeConditions()
			s.MarkBindingUnavailable("TheReason", "this is the message")
			return s
		}(),
		want: false,
	}, {
		name: "mark available",
		s: func() *SinkBindingStatus {
			s := &SinkBindingStatus{}
			s.InitializeConditions()
			s.MarkBindingAvailable()
			return s
		}(),
		want: true,
	}}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			got := test.s.IsReady()
			if diff := cmp.Diff(test.want, got); diff != "" {
				t.Errorf("%s: unexpected condition (-want, +got) = %v", test.name, diff)
			}
		})
	}
}

func TestSinkBindingUndo(t *testing.T) {
	tests := []struct {
		name string
		in   *duckv1.WithPod
		want *duckv1.WithPod
	}{{
		name: "nothing to remove",
		in: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
						}},
					},
				},
			},
		},
		want: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
						}},
					},
				},
			},
		},
	}, {
		name: "lots to remove",
		in: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						InitContainers: []corev1.Container{{
							Name:  "setup",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "K_SINK",
								Value: "http://localhost:8080",
							}},
						}},
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "FOO",
								Value: "BAR",
							}, {
								Name:  "K_SINK",
								Value: "http://localhost:8080",
							}, {
								Name:  "BAZ",
								Value: "INGA",
							}},
						}, {
							Name:  "sidecar",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "K_SINK",
								Value: "http://localhost:8080",
							}, {
								Name:  "BAZ",
								Value: "INGA",
							}},
						}},
					},
				},
			},
		},
		want: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						InitContainers: []corev1.Container{{
							Name:  "setup",
							Image: "busybox",
							Env:   []corev1.EnvVar{},
						}},
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "FOO",
								Value: "BAR",
							}, {
								Name:  "BAZ",
								Value: "INGA",
							}},
						}, {
							Name:  "sidecar",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "BAZ",
								Value: "INGA",
							}},
						}},
					},
				},
			},
		},
	}}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			got := test.in
			sb := &SinkBinding{}
			sb.Undo(context.Background(), got)

			if !cmp.Equal(got, test.want) {
				t.Errorf("Undo (-want, +got): %s", cmp.Diff(test.want, got))
			}
		})
	}
}

func TestSinkBindingDo(t *testing.T) {
	sinkURI := &apis.URL{
		Scheme: "http",
		Host:   "thing.ns.svc.cluster.local",
		Path:   "/a/path",
	}

	tests := []struct {
		name string
		in   *duckv1.WithPod
		want *duckv1.WithPod
	}{{
		name: "nothing to add",
		in: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "K_SINK",
								Value: sinkURI.String(),
							}},
						}},
					},
				},
			},
		},
		want: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "K_SINK",
								Value: sinkURI.String(),
							}},
						}},
					},
				},
			},
		},
	}, {
		name: "fix the URI",
		in: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "K_SINK",
								Value: "the wrong value",
							}},
						}},
					},
				},
			},
		},
		want: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "K_SINK",
								Value: sinkURI.String(),
							}},
						}},
					},
				},
			},
		},
	}, {
		name: "lots of uris",
		in: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						InitContainers: []corev1.Container{{
							Name:  "setup",
							Image: "busybox",
						}},
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "FOO",
								Value: "BAR",
							}, {
								Name:  "BAZ",
								Value: "INGA",
							}},
						}, {
							Name:  "sidecar",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "BAZ",
								Value: "INGA",
							}},
						}},
					},
				},
			},
		},
		want: &duckv1.WithPod{
			Spec: duckv1.WithPodSpec{
				Template: duckv1.PodSpecable{
					Spec: corev1.PodSpec{
						InitContainers: []corev1.Container{{
							Name:  "setup",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "K_SINK",
								Value: sinkURI.String(),
							}},
						}},
						Containers: []corev1.Container{{
							Name:  "blah",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "FOO",
								Value: "BAR",
							}, {
								Name:  "BAZ",
								Value: "INGA",
							}, {
								Name:  "K_SINK",
								Value: sinkURI.String(),
							}},
						}, {
							Name:  "sidecar",
							Image: "busybox",
							Env: []corev1.EnvVar{{
								Name:  "BAZ",
								Value: "INGA",
							}, {
								Name:  "K_SINK",
								Value: sinkURI.String(),
							}},
						}},
					},
				},
			},
		},
	}}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			got := test.in

			ctx := WithSinkURI(context.Background(), sinkURI)

			sb := &SinkBinding{}
			sb.Do(ctx, got)

			dep := sb.Status.GetCondition(StatusConditionTypeDeprecated)
			if dep == nil {
				t.Errorf("expected Deprecated type condition to be set, found nil")
			}

			if !cmp.Equal(got, test.want) {
				t.Errorf("Undo (-want, +got): %s", cmp.Diff(test.want, got))
			}
		})
	}
}

func TestSinkBindingDoNoURI(t *testing.T) {
	want := &duckv1.WithPod{
		Spec: duckv1.WithPodSpec{
			Template: duckv1.PodSpecable{
				Spec: corev1.PodSpec{
					Containers: []corev1.Container{{
						Name:  "blah",
						Image: "busybox",
						Env:   []corev1.EnvVar{},
					}},
				},
			},
		},
	}
	got := &duckv1.WithPod{
		Spec: duckv1.WithPodSpec{
			Template: duckv1.PodSpecable{
				Spec: corev1.PodSpec{
					Containers: []corev1.Container{{
						Name:  "blah",
						Image: "busybox",
						Env: []corev1.EnvVar{{
							Name:  "K_SINK",
							Value: "this should be removed",
						}},
					}},
				},
			},
		},
	}

	sb := &SinkBinding{}
	sb.Do(context.Background(), got)

	if !cmp.Equal(got, want) {
		t.Errorf("Undo (-want, +got): %s", cmp.Diff(want, got))
	}
}
