/*
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 (
	"testing"

	"github.com/moby/buildkit/frontend/dockerfile/instructions"

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

func Test_reviewConfig(t *testing.T) {
	tests := []struct {
		name               string
		dockerfile         string
		originalCmd        []string
		originalEntrypoint []string
		expectedCmd        []string
	}{
		{
			name: "entrypoint and cmd declared",
			dockerfile: `
			FROM scratch
			CMD ["mycmd"]
			ENTRYPOINT ["myentrypoint"]`,
			originalEntrypoint: []string{"myentrypoint"},
			originalCmd:        []string{"mycmd"},
			expectedCmd:        []string{"mycmd"},
		},
		{
			name: "only entrypoint declared",
			dockerfile: `
			FROM scratch
			ENTRYPOINT ["myentrypoint"]`,
			originalEntrypoint: []string{"myentrypoint"},
			originalCmd:        []string{"mycmd"},
			expectedCmd:        nil,
		},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			config := &v1.Config{
				Cmd:        test.originalCmd,
				Entrypoint: test.originalEntrypoint,
			}
			reviewConfig(stage(t, test.dockerfile), config)
			testutil.CheckErrorAndDeepEqual(t, false, nil, test.expectedCmd, config.Cmd)
		})
	}
}

func stage(t *testing.T, d string) config.KanikoStage {
	stages, _, err := dockerfile.Parse([]byte(d))
	if err != nil {
		t.Fatalf("error parsing dockerfile: %v", err)
	}
	return config.KanikoStage{
		Stage: stages[0],
	}
}

type MockCommand struct {
	name string
}

func (m *MockCommand) Name() string {
	return m.name
}

func Test_stageBuilder_shouldTakeSnapshot(t *testing.T) {
	commands := []instructions.Command{
		&MockCommand{name: "command1"},
		&MockCommand{name: "command2"},
		&MockCommand{name: "command3"},
	}

	stage := instructions.Stage{
		Commands: commands,
	}

	type fields struct {
		stage config.KanikoStage
		opts  *config.KanikoOptions
	}
	type args struct {
		index int
		files []string
	}
	tests := []struct {
		name   string
		fields fields
		args   args
		want   bool
	}{
		{
			name: "final stage not last command",
			fields: fields{
				stage: config.KanikoStage{
					Final: true,
					Stage: stage,
				},
			},
			args: args{
				index: 1,
			},
			want: true,
		},
		{
			name: "not final stage last command",
			fields: fields{
				stage: config.KanikoStage{
					Final: false,
					Stage: stage,
				},
			},
			args: args{
				index: len(commands) - 1,
			},
			want: true,
		},
		{
			name: "not final stage not last command",
			fields: fields{
				stage: config.KanikoStage{
					Final: false,
					Stage: stage,
				},
			},
			args: args{
				index: 0,
			},
			want: false,
		},
		{
			name: "caching enabled intermediate container",
			fields: fields{
				stage: config.KanikoStage{
					Final: false,
					Stage: stage,
				},
				opts: &config.KanikoOptions{Cache: true},
			},
			args: args{
				index: 0,
			},
			want: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			if tt.fields.opts == nil {
				tt.fields.opts = &config.KanikoOptions{}
			}
			s := &stageBuilder{
				stage: tt.fields.stage,
				opts:  tt.fields.opts,
			}
			if got := s.shouldTakeSnapshot(tt.args.index, tt.args.files); got != tt.want {
				t.Errorf("stageBuilder.shouldTakeSnapshot() = %v, want %v", got, tt.want)
			}
		})
	}
}