package cmd

import (
	"fmt"
	"io"
	"io/ioutil"
	"strings"
	"testing"

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

func configOpenFileMock(name 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{"stepMetadata"}
		assert.Equal(t, exp, gotReq, "required flags incorrect")
	})

	t.Run("Optional flags", func(t *testing.T) {
		exp := []string{"contextConfig", "output", "parametersJSON"}
		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
			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, 0, len(filters.All), "wrong number of filter values")
		assert.NoError(t, err, "error occured 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 occured 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))
		})
	}
}