// Copyright © 2018 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 service

import (
	"strings"
	"testing"

	"gotest.tools/assert"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	clienttesting "k8s.io/client-go/testing"
	"knative.dev/pkg/apis"
	servingv1 "knative.dev/serving/pkg/apis/serving/v1"

	"knative.dev/client/pkg/kn/commands"
	"knative.dev/client/pkg/util"
)

func fakeServiceList(args []string, response *servingv1.ServiceList) (action clienttesting.Action, output []string, err error) {
	knParams := &commands.KnParams{}
	cmd, fakeServing, buf := commands.CreateTestKnCommand(NewServiceCommand(knParams), knParams)
	fakeServing.AddReactor("*", "*",
		func(a clienttesting.Action) (bool, runtime.Object, error) {
			action = a
			return true, response, nil
		})
	cmd.SetArgs(args)
	err = cmd.Execute()
	if err != nil {
		return
	}
	output = strings.Split(buf.String(), "\n")
	return
}

func TestListEmpty(t *testing.T) {
	action, output, err := fakeServiceList([]string{"service", "list"}, &servingv1.ServiceList{})
	assert.NilError(t, err)
	if action == nil {
		t.Errorf("No action")
	} else if !action.Matches("list", "services") {
		t.Errorf("Bad action %v", action)
	} else if output[0] != "No services found." {
		t.Errorf("Bad output %s", output[0])
	}
}

func TestGetEmpty(t *testing.T) {
	action, _, err := fakeServiceList([]string{"service", "list", "name"}, &servingv1.ServiceList{})
	assert.NilError(t, err)
	if action == nil {
		t.Errorf("No action")
	} else if !action.Matches("list", "services") {
		t.Errorf("Bad action %v", action)
	}
}

func TestServiceListDefaultOutput(t *testing.T) {
	service1 := createMockServiceWithParams("foo", "default", "http://foo.default.example.com", "foo-xyz")
	service3 := createMockServiceWithParams("sss", "default", "http://sss.default.example.com", "sss-xyz")
	service2 := createMockServiceWithParams("bar", "default", "http://bar.default.example.com", "bar-xyz")
	serviceList := &servingv1.ServiceList{Items: []servingv1.Service{*service1, *service2, *service3}}
	action, output, err := fakeServiceList([]string{"service", "list"}, serviceList)
	assert.NilError(t, err)
	if action == nil {
		t.Errorf("No action")
	} else if !action.Matches("list", "services") {
		t.Errorf("Bad action %v", action)
	}
	// Outputs in alphabetical order
	assert.Check(t, util.ContainsAll(output[0], "NAME", "URL", "LATEST", "AGE", "CONDITIONS", "READY", "REASON"))
	assert.Check(t, util.ContainsAll(output[1], "bar", "bar.default.example.com", "bar-xyz"))
	assert.Check(t, util.ContainsAll(output[2], "foo", "foo.default.example.com", "foo-xyz"))
	assert.Check(t, util.ContainsAll(output[3], "sss", "sss.default.example.com", "sss-xyz"))
}

func TestServiceListAllNamespacesOutput(t *testing.T) {
	service1 := createMockServiceWithParams("foo", "default", "http://foo.default.example.com", "foo-xyz")
	service2 := createMockServiceWithParams("bar", "foo", "http://bar.foo.example.com", "bar-xyz")
	service3 := createMockServiceWithParams("sss", "bar", "http://sss.bar.example.com", "sss-xyz")
	serviceList := &servingv1.ServiceList{Items: []servingv1.Service{*service1, *service2, *service3}}
	action, output, err := fakeServiceList([]string{"service", "list", "--all-namespaces"}, serviceList)
	if err != nil {
		t.Fatal(err)
	}
	if action == nil {
		t.Errorf("No action")
	} else if !action.Matches("list", "services") {
		t.Errorf("Bad action %v", action)
	}
	// Outputs in alphabetical order
	assert.Check(t, util.ContainsAll(output[0], "NAMESPACE", "NAME", "URL", "LATEST", "AGE", "CONDITIONS", "READY", "REASON"))
	assert.Check(t, util.ContainsAll(output[1], "bar", "sss", "sss.bar.example.com", "sss-xyz"))
	assert.Check(t, util.ContainsAll(output[2], "default", "foo", "foo.default.example.com", "foo-xyz"))
	assert.Check(t, util.ContainsAll(output[3], "foo", "bar", "bar.foo.example.com", "bar-xyz"))
}

func TestServiceListDefaultOutputNoHeaders(t *testing.T) {
	service1 := createMockServiceWithParams("foo", "default", "http://foo.default.example.com", "foo-xyz")
	service2 := createMockServiceWithParams("bar", "default", "http://bar.default.example.com", "bar-xyz")
	serviceList := &servingv1.ServiceList{Items: []servingv1.Service{*service1, *service2}}
	action, output, err := fakeServiceList([]string{"service", "list", "--no-headers"}, serviceList)
	assert.NilError(t, err)
	if action == nil {
		t.Errorf("No action")
	} else if !action.Matches("list", "services") {
		t.Errorf("Bad action %v", action)
	}

	assert.Check(t, util.ContainsNone(output[0], "NAME", "URL", "LATEST", "AGE", "CONDITIONS", "READY", "REASON"))
	assert.Check(t, util.ContainsAll(output[0], "bar", "bar.default.example.com", "bar-xyz"))
	assert.Check(t, util.ContainsAll(output[1], "foo", "foo.default.example.com", "foo-xyz"))

}

func TestServiceGetOneOutput(t *testing.T) {
	service := createMockServiceWithParams("foo", "default", "foo.default.example.com", "foo-xyz")
	serviceList := &servingv1.ServiceList{Items: []servingv1.Service{*service}}
	action, output, err := fakeServiceList([]string{"service", "list", "foo"}, serviceList)
	assert.NilError(t, err)
	if action == nil {
		t.Errorf("No action")
	} else if !action.Matches("list", "services") {
		t.Errorf("Bad action %v", action)
	}
	assert.Check(t, util.ContainsAll(output[0], "NAME", "URL", "LATEST", "AGE", "CONDITIONS", "READY", "REASON"))
	assert.Check(t, util.ContainsAll(output[1], "foo", "foo.default.example.com", "foo-xyz"))
}

func TestServiceGetWithTwoSrvName(t *testing.T) {
	service := createMockServiceWithParams("foo", "default", "foo.default.example.com", "foo-xyz")
	serviceList := &servingv1.ServiceList{Items: []servingv1.Service{*service}}
	_, _, err := fakeServiceList([]string{"service", "list", "foo", "bar"}, serviceList)
	assert.ErrorContains(t, err, "'kn service list' accepts maximum 1 argument")
}

func createMockServiceWithParams(name, namespace, urlS string, revision string) *servingv1.Service {
	url, _ := apis.ParseURL(urlS)
	service := &servingv1.Service{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Service",
			APIVersion: "serving.knative.dev/v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      name,
			Namespace: namespace,
		},
		Spec: servingv1.ServiceSpec{},
		Status: servingv1.ServiceStatus{
			RouteStatusFields: servingv1.RouteStatusFields{
				URL: url,
			},
			ConfigurationStatusFields: servingv1.ConfigurationStatusFields{
				LatestCreatedRevisionName: revision,
				LatestReadyRevisionName:   revision,
			},
		},
	}
	return service
}