// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0

package commands_test

import (
	"bytes"
	"io/ioutil"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"sigs.k8s.io/kustomize/cmd/config/internal/commands"
	"sigs.k8s.io/kustomize/kyaml/copyutil"
	"sigs.k8s.io/kustomize/kyaml/openapi"
)

// TODO(pwittrock): write tests for reading / writing ResourceLists

func TestCmd_files(t *testing.T) {
	d, err := ioutil.TempDir("", "kustomize-cat-test")
	if !assert.NoError(t, err) {
		return
	}
	defer os.RemoveAll(d)

	err = ioutil.WriteFile(filepath.Join(d, "f1.yaml"), []byte(`
kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
`), 0600)
	if !assert.NoError(t, err) {
		return
	}
	err = ioutil.WriteFile(filepath.Join(d, "f2.yaml"), []byte(`
apiVersion: v1
kind: Abstraction
metadata:
  name: foo
  configFn:
    container:
      image: gcr.io/example/reconciler:v1
  annotations:
    config.kubernetes.io/local-config: "true"
spec:
  replicas: 3
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: bar
  annotations:
    app: nginx
spec:
  replicas: 3
`), 0600)
	if !assert.NoError(t, err) {
		return
	}

	// fmt the files
	b := &bytes.Buffer{}
	r := commands.GetCatRunner("")
	r.Command.SetArgs([]string{d})
	r.Command.SetOut(b)
	if !assert.NoError(t, r.Command.Execute()) {
		return
	}

	if !assert.Equal(t, `kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: bar
  labels:
    app: nginx
  annotations:
    app: nginx
spec:
  replicas: 3
`, b.String()) {
		return
	}
}

func TestCmd_filesWithReconcilers(t *testing.T) {
	d, err := ioutil.TempDir("", "kustomize-cat-test")
	if !assert.NoError(t, err) {
		return
	}
	defer os.RemoveAll(d)

	err = ioutil.WriteFile(filepath.Join(d, "f1.yaml"), []byte(`
kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
`), 0600)
	if !assert.NoError(t, err) {
		return
	}
	err = ioutil.WriteFile(filepath.Join(d, "f2.yaml"), []byte(`
apiVersion: v1
kind: Abstraction
metadata:
  name: foo
  configFn:
    container:
      image: gcr.io/example/image:version
  annotations:
    config.kubernetes.io/local-config: "true"
spec:
  replicas: 3
---
kind: Deployment
metadata:
  labels:
    app: nginx
  name: bar
  annotations:
    app: nginx
spec:
  replicas: 3`), 0600)
	if !assert.NoError(t, err) {
		return
	}

	// fmt the files
	b := &bytes.Buffer{}
	r := commands.GetCatRunner("")
	r.Command.SetArgs([]string{d, "--include-local"})
	r.Command.SetOut(b)
	if !assert.NoError(t, r.Command.Execute()) {
		return
	}

	if !assert.Equal(t, `kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
---
apiVersion: v1
kind: Abstraction
metadata:
  name: foo
  annotations:
    config.kubernetes.io/local-config: "true"
  configFn:
    container:
      image: gcr.io/example/image:version
spec:
  replicas: 3
---
kind: Deployment
metadata:
  labels:
    app: nginx
  name: bar
  annotations:
    app: nginx
spec:
  replicas: 3
`, b.String()) {
		return
	}
}

func TestCmd_filesWithoutNonReconcilers(t *testing.T) {
	d, err := ioutil.TempDir("", "kustomize-cat-test")
	if !assert.NoError(t, err) {
		return
	}
	defer os.RemoveAll(d)

	err = ioutil.WriteFile(filepath.Join(d, "f1.yaml"), []byte(`
kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
`), 0600)
	if !assert.NoError(t, err) {
		return
	}
	err = ioutil.WriteFile(filepath.Join(d, "f2.yaml"), []byte(`
apiVersion: v1
kind: Abstraction
metadata:
  name: foo
  annotations:
    config.kubernetes.io/local-config: "true"
  configFn:
    container:
      image: gcr.io/example/reconciler:v1
spec:
  replicas: 3
---
kind: Deployment
metadata:
  labels:
    app: nginx
  name: bar
  annotations:
    app: nginx
spec:
  replicas: 3
`), 0600)
	if !assert.NoError(t, err) {
		return
	}

	// fmt the files
	b := &bytes.Buffer{}
	r := commands.GetCatRunner("")
	r.Command.SetArgs([]string{d, "--include-local", "--exclude-non-local"})
	r.Command.SetOut(b)
	if !assert.NoError(t, r.Command.Execute()) {
		return
	}

	if !assert.Equal(t, `apiVersion: v1
kind: Abstraction
metadata:
  name: foo
  annotations:
    config.kubernetes.io/local-config: "true"
  configFn:
    container:
      image: gcr.io/example/reconciler:v1
spec:
  replicas: 3
`, b.String()) {
		return
	}
}

func TestCmd_outputTruncateFile(t *testing.T) {
	d, err := ioutil.TempDir("", "kustomize-cat-test")
	if !assert.NoError(t, err) {
		return
	}
	defer os.RemoveAll(d)

	err = ioutil.WriteFile(filepath.Join(d, "f1.yaml"), []byte(`
kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
`), 0600)
	if !assert.NoError(t, err) {
		return
	}
	err = ioutil.WriteFile(filepath.Join(d, "f2.yaml"), []byte(`
apiVersion: v1
kind: Abstraction
metadata:
  name: foo
  configFn:
    container:
      image: gcr.io/example/reconciler:v1
  annotations:
    config.kubernetes.io/local-config: "true"
spec:
  replicas: 3
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: bar
  annotations:
    app: nginx
spec:
  replicas: 3`), 0600)
	if !assert.NoError(t, err) {
		return
	}

	f, err := ioutil.TempFile("", "kustomize-cat-test-dest")
	if !assert.NoError(t, err) {
		return
	}
	defer os.RemoveAll(d)

	// fmt the files
	b := &bytes.Buffer{}
	r := commands.GetCatRunner("")
	r.Command.SetArgs([]string{d, "--dest", f.Name()})
	r.Command.SetOut(b)
	if !assert.NoError(t, r.Command.Execute()) {
		return
	}

	if !assert.Equal(t, ``, b.String()) {
		return
	}

	actual, err := ioutil.ReadFile(f.Name())
	if !assert.NoError(t, err) {
		return
	}
	if !assert.Equal(t, `kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: bar
  labels:
    app: nginx
  annotations:
    app: nginx
spec:
  replicas: 3
`, string(actual)) {
		return
	}
}

func TestCmd_outputCreateFile(t *testing.T) {
	d, err := ioutil.TempDir("", "kustomize-cat-test")
	if !assert.NoError(t, err) {
		return
	}
	defer os.RemoveAll(d)

	err = ioutil.WriteFile(filepath.Join(d, "f1.yaml"), []byte(`
kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
`), 0600)
	if !assert.NoError(t, err) {
		return
	}
	err = ioutil.WriteFile(filepath.Join(d, "f2.yaml"), []byte(`
apiVersion: v1
kind: Abstraction
metadata:
  name: foo
  configFn:
    container:
      image: gcr.io/example/reconciler:v1
  annotations:
    config.kubernetes.io/local-config: "true"
spec:
  replicas: 3
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: bar
  annotations:
    app: nginx
spec:
  replicas: 3`), 0600)
	if !assert.NoError(t, err) {
		return
	}

	d2, err := ioutil.TempDir("", "kustomize-cat-test-dest")
	if !assert.NoError(t, err) {
		return
	}
	defer os.RemoveAll(d2)
	f := filepath.Join(d2, "output.yaml")

	// fmt the files
	b := &bytes.Buffer{}
	r := commands.GetCatRunner("")
	r.Command.SetArgs([]string{d, "--dest", f})
	r.Command.SetOut(b)
	if !assert.NoError(t, r.Command.Execute()) {
		return
	}

	if !assert.Equal(t, ``, b.String()) {
		return
	}

	actual, err := ioutil.ReadFile(f)
	if !assert.NoError(t, err) {
		return
	}
	if !assert.Equal(t, `kind: Deployment
metadata:
  labels:
    app: nginx2
  name: foo
  annotations:
    app: nginx2
spec:
  replicas: 1
---
kind: Service
metadata:
  name: foo
  annotations:
    app: nginx
spec:
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: bar
  labels:
    app: nginx
  annotations:
    app: nginx
spec:
  replicas: 3
`, string(actual)) {
		return
	}
}

func TestCatSubPackages(t *testing.T) {
	var tests = []struct {
		name        string
		dataset     string
		packagePath string
		args        []string
		expected    string
	}{
		{
			name:    "cat-recurse-subpackages",
			dataset: "dataset-without-setters",
			expected: `
# Copyright 2019 The Kubernetes Authors.
# SPDX-License-Identifier: Apache-2.0

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deployment
  namespace: myspace
spec:
  replicas: 3
  template:
    spec:
      containers:
      - name: mysql
        image: mysql:1.7.9
---
# Copyright 2019 The Kubernetes Authors.
# SPDX-License-Identifier: Apache-2.0

apiVersion: apps/v1
kind: Deployment
metadata:
  name: storage-deployment
  namespace: myspace
spec:
  replicas: 4
  template:
    spec:
      containers:
      - name: storage
        image: storage:1.7.7
`,
		},
		{
			name:        "cat-top-level-pkg-no-recurse-subpackages",
			dataset:     "dataset-without-setters",
			args:        []string{"-R=false"},
			packagePath: "mysql",
			expected: `# Copyright 2019 The Kubernetes Authors.
# SPDX-License-Identifier: Apache-2.0

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deployment
  namespace: myspace
spec:
  replicas: 3
  template:
    spec:
      containers:
      - name: mysql
        image: mysql:1.7.9
`,
		},
		{
			name:        "cat-nested-pkg-no-recurse-subpackages",
			dataset:     "dataset-without-setters",
			packagePath: "mysql/storage",
			args:        []string{"-R=false"},
			expected: `# Copyright 2019 The Kubernetes Authors.
# SPDX-License-Identifier: Apache-2.0

apiVersion: apps/v1
kind: Deployment
metadata:
  name: storage-deployment
  namespace: myspace
spec:
  replicas: 4
  template:
    spec:
      containers:
      - name: storage
        image: storage:1.7.7
`,
		},
	}
	for i := range tests {
		test := tests[i]
		t.Run(test.name, func(t *testing.T) {
			// reset the openAPI afterward
			openapi.ResetOpenAPI()
			defer openapi.ResetOpenAPI()
			sourceDir := filepath.Join("test", "testdata", test.dataset)
			baseDir, err := ioutil.TempDir("", "")
			if !assert.NoError(t, err) {
				t.FailNow()
			}
			copyutil.CopyDir(sourceDir, baseDir)
			defer os.RemoveAll(baseDir)
			runner := commands.GetCatRunner("")
			actual := &bytes.Buffer{}
			runner.Command.SetOut(actual)
			runner.Command.SetArgs(append([]string{filepath.Join(baseDir, test.packagePath)}, test.args...))
			err = runner.Command.Execute()
			if !assert.NoError(t, err) {
				t.FailNow()
			}

			// normalize path format for windows
			actualNormalized := strings.ReplaceAll(
				strings.ReplaceAll(actual.String(), "\\", "/"),
				"//", "/")

			expected := strings.ReplaceAll(test.expected, "${baseDir}", baseDir)
			expectedNormalized := strings.ReplaceAll(expected, "\\", "/")
			if !assert.Equal(t, expectedNormalized, actualNormalized) {
				t.FailNow()
			}
		})
	}
}