package cmd

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

	"github.com/SAP/jenkins-library/pkg/config"
	"github.com/spf13/cobra"
	flag "github.com/spf13/pflag"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func configOpenFileMock(name string, tokens map[string]string) (io.ReadCloser, error) {
	var r string
	switch name {
	case "TestAddCustomDefaults_default1":
		r = "default1"
	case "TestAddCustomDefaults_default2":
		r = "default3"
	default:
		r = ""
	}
	return ioutil.NopCloser(strings.NewReader(r)), nil
}

func TestConfigCommand(t *testing.T) {
	cmd := ConfigCommand()

	gotReq := []string{}
	gotOpt := []string{}

	cmd.Flags().VisitAll(func(pflag *flag.Flag) {
		annotations, found := pflag.Annotations[cobra.BashCompOneRequiredFlag]
		if found && annotations[0] == "true" {
			gotReq = append(gotReq, pflag.Name)
		} else {
			gotOpt = append(gotOpt, pflag.Name)
		}
	})

	t.Run("Required flags", func(t *testing.T) {
		exp := []string{}
		assert.Equal(t, exp, gotReq, "required flags incorrect")
	})

	t.Run("Optional flags", func(t *testing.T) {
		exp := []string{"contextConfig", "output", "parametersJSON", "stageConfig", "stageConfigAcceptedParams", "stepMetadata", "stepName"}
		assert.Equal(t, exp, gotOpt, "optional flags incorrect")
	})

	t.Run("Run", func(t *testing.T) {
		t.Run("Success case", func(t *testing.T) {
			configOptions.openFile = configOpenFileMock
			configOptions.stepName = "githubCreateIssue"
			cmd.Run(cmd, []string{})
		})
	})
}

func TestDefaultsAndFilters(t *testing.T) {
	metadata := config.StepData{
		Spec: config.StepSpec{
			Inputs: config.StepInputs{
				Parameters: []config.StepParameters{
					{Name: "paramOne", Scope: []string{"GENERAL", "STEPS", "STAGES", "PARAMETERS", "ENV"}},
				},
			},
		},
	}

	t.Run("Context config", func(t *testing.T) {
		configOptions.contextConfig = true
		defer func() { configOptions.contextConfig = false }()
		defaults, filters, err := defaultsAndFilters(&metadata, "stepName")

		assert.Equal(t, 1, len(defaults), "getting defaults failed")
		assert.Equal(t, 3, len(filters.All), "wrong number of filter values")
		assert.NoError(t, err, "error occurred but none expected")
	})

	t.Run("Step config", func(t *testing.T) {
		defaults, filters, err := defaultsAndFilters(&metadata, "stepName")
		assert.Equal(t, 0, len(defaults), "getting defaults failed")
		assert.Equal(t, 2, len(filters.All), "wrong number of filter values")
		assert.NoError(t, err, "error occurred but none expected")
	})
}

func TestApplyContextConditions(t *testing.T) {

	tt := []struct {
		name     string
		metadata config.StepData
		conf     config.StepConfig
		expected map[string]interface{}
	}{
		{
			name:     "no context conditions",
			metadata: config.StepData{Spec: config.StepSpec{Containers: []config.Container{}}},
			conf:     config.StepConfig{Config: map[string]interface{}{}},
			expected: map[string]interface{}{},
		},
		{
			name: "context condition not met",
			metadata: config.StepData{Spec: config.StepSpec{Containers: []config.Container{
				{
					Image: "myDefaultImage:latest",
					Conditions: []config.Condition{
						{
							ConditionRef: "strings-equal",
							Params: []config.Param{
								{Name: "param1", Value: "val2"},
							},
						},
					},
				},
			}}},
			conf: config.StepConfig{Config: map[string]interface{}{
				"param1": "val1",
				"val1":   map[string]interface{}{"dockerImage": "myTestImage:latest"},
			}},
			expected: map[string]interface{}{
				"param1": "val1",
				"val1":   map[string]interface{}{"dockerImage": "myTestImage:latest"},
			},
		},
		{
			name: "context condition met",
			metadata: config.StepData{Spec: config.StepSpec{Containers: []config.Container{
				{
					Image: "myDefaultImage:latest",
					Conditions: []config.Condition{
						{
							ConditionRef: "strings-equal",
							Params: []config.Param{
								{Name: "param1", Value: "val1"},
							},
						},
					},
				},
			}}},
			conf: config.StepConfig{Config: map[string]interface{}{
				"param1": "val1",
				"val1":   map[string]interface{}{"dockerImage": "myTestImage:latest"},
			}},
			expected: map[string]interface{}{
				"param1":      "val1",
				"dockerImage": "myTestImage:latest",
			},
		},
		{
			name: "context condition met - root defined already",
			metadata: config.StepData{Spec: config.StepSpec{Containers: []config.Container{
				{
					Image: "myDefaultImage:latest",
					Conditions: []config.Condition{
						{
							ConditionRef: "strings-equal",
							Params: []config.Param{
								{Name: "param1", Value: "val1"},
							},
						},
					},
				},
			}}},
			conf: config.StepConfig{Config: map[string]interface{}{
				"param1":      "val1",
				"dockerImage": "myTestImage:latest",
			}},
			expected: map[string]interface{}{
				"param1":      "val1",
				"dockerImage": "myTestImage:latest",
			},
		},
		{
			name: "context condition met - root defined and deep value defined",
			metadata: config.StepData{Spec: config.StepSpec{Containers: []config.Container{
				{
					Image: "myDefaultImage:latest",
					Conditions: []config.Condition{
						{
							ConditionRef: "strings-equal",
							Params: []config.Param{
								{Name: "param1", Value: "val1"},
							},
						},
					},
				},
			}}},
			conf: config.StepConfig{Config: map[string]interface{}{
				"param1":      "val1",
				"val1":        map[string]interface{}{"dockerImage": "mySubTestImage:latest"},
				"dockerImage": "myTestImage:latest",
			}},
			expected: map[string]interface{}{
				"param1":      "val1",
				"dockerImage": "myTestImage:latest",
			},
		},
		{
			name: "context condition met - root defined as empty",
			metadata: config.StepData{Spec: config.StepSpec{Containers: []config.Container{
				{
					Image: "myDefaultImage:latest",
					Conditions: []config.Condition{
						{
							ConditionRef: "strings-equal",
							Params: []config.Param{
								{Name: "param1", Value: "val1"},
							},
						},
					},
				},
			}}},
			conf: config.StepConfig{Config: map[string]interface{}{
				"param1":      "val1",
				"dockerImage": "",
			}},
			expected: map[string]interface{}{
				"param1":      "val1",
				"dockerImage": "",
			},
		},
		//ToDo: Sidecar behavior not properly working, expects sidecarImage, ... parameters and not dockerImage
		{
			name: "sidecar context condition met",
			metadata: config.StepData{Spec: config.StepSpec{Sidecars: []config.Container{
				{
					Image: "myTestImage:latest",
					Conditions: []config.Condition{
						{
							ConditionRef: "strings-equal",
							Params: []config.Param{
								{Name: "param1", Value: "val1"},
							},
						},
					},
				},
			}}},
			conf: config.StepConfig{Config: map[string]interface{}{
				"param1": "val1",
				"val1":   map[string]interface{}{"dockerImage": "myTestImage:latest"},
			}},
			expected: map[string]interface{}{
				"param1":      "val1",
				"dockerImage": "myTestImage:latest",
			},
		},
	}

	for run, test := range tt {
		t.Run(test.name, func(t *testing.T) {
			applyContextConditions(test.metadata, &test.conf)
			assert.Equalf(t, test.expected, test.conf.Config, fmt.Sprintf("Run %v failed", run))
		})
	}
}

func TestPrepareOutputEnvironment(t *testing.T) {
	outputResources := []config.StepResources{
		{
			Name: "commonPipelineEnvironment",
			Type: "piperEnvironment",
			Parameters: []map[string]interface{}{
				{"name": "param0"},
				{"name": "path1/param1"},
				{"name": "path2/param2"},
			},
		},
		{
			Name: "influx",
			Type: "influx",
			Parameters: []map[string]interface{}{
				{
					"name": "measurement0",
					"fields": []map[string]string{
						{"name": "influx0_0"},
						{"name": "influx0_1"},
					},
				},
				{
					"name": "measurement1",
					"fields": []map[string]string{
						{"name": "influx1_0"},
						{"name": "influx1_1"},
					},
				},
			},
		},
	}

	dir, tempDirErr := ioutil.TempDir("", "")
	defer os.RemoveAll(dir)
	require.NoError(t, tempDirErr)
	require.DirExists(t, dir, "Failed to create temporary directory")

	prepareOutputEnvironment(outputResources, dir)
	assert.DirExists(t, filepath.Join(dir, "commonPipelineEnvironment", "path1"))
	assert.DirExists(t, filepath.Join(dir, "commonPipelineEnvironment", "path2"))
	assert.DirExists(t, filepath.Join(dir, "influx", "measurement0"))
	assert.DirExists(t, filepath.Join(dir, "influx", "measurement1"))
	assert.NoDirExists(t, filepath.Join(dir, "commonPipelineEnvironment", "param0"))
	assert.NoDirExists(t, filepath.Join(dir, "commonPipelineEnvironment", "path1", "param1"))
	assert.NoDirExists(t, filepath.Join(dir, "commonPipelineEnvironment", "path2", "param2"))
	assert.NoDirExists(t, filepath.Join(dir, "influx", "measurement0", "influx0_0"))
	assert.NoDirExists(t, filepath.Join(dir, "influx", "measurement1", "influx0_1"))
}

func TestResolveMetadata(t *testing.T) {

	t.Run("Succes - stepName", func(t *testing.T) {
		configOptions.stepName = "githubCreateIssue"
		stepData, err := resolveMetadata()
		assert.NoError(t, err)
		assert.Equal(t, "githubCreateIssue", stepData.Metadata.Name)
	})

	t.Run("Error - wrong stepName", func(t *testing.T) {
		configOptions.stepName = "notExisting"
		_, err := resolveMetadata()
		assert.EqualError(t, err, "could not retrieve by stepName notExisting")
	})

	t.Run("Error - missing input", func(t *testing.T) {
		configOptions.stepName = ""
		_, err := resolveMetadata()
		assert.EqualError(t, err, "either one of stepMetadata or stepName parameter has to be passed")
	})
}