package describe

import (
	"context"
	"testing"

	"github.com/stackitcloud/stackit-cli/internal/pkg/types"

	"github.com/stackitcloud/stackit-cli/internal/pkg/globalflags"
	"github.com/stackitcloud/stackit-cli/internal/pkg/print"

	"github.com/google/go-cmp/cmp"
	"github.com/google/go-cmp/cmp/cmpopts"
	"github.com/google/uuid"
	"github.com/stackitcloud/stackit-sdk-go/services/observability"
)

var projectIdFlag = globalflags.ProjectIdFlag

type testCtxKey struct{}

var testCtx = context.WithValue(context.Background(), testCtxKey{}, "foo")
var testClient = &observability.APIClient{}
var testProjectId = uuid.NewString()
var testInstanceId = uuid.NewString()

func fixtureArgValues(mods ...func(argValues []string)) []string {
	argValues := []string{
		testInstanceId,
	}
	for _, mod := range mods {
		mod(argValues)
	}
	return argValues
}

func fixtureFlagValues(mods ...func(flagValues map[string]string)) map[string]string {
	flagValues := map[string]string{
		projectIdFlag: testProjectId,
	}
	for _, mod := range mods {
		mod(flagValues)
	}
	return flagValues
}

func fixtureInputModel(mods ...func(model *inputModel)) *inputModel {
	model := &inputModel{
		GlobalFlagModel: &globalflags.GlobalFlagModel{
			ProjectId: testProjectId,
			Verbosity: globalflags.VerbosityDefault,
		},
		InstanceId: testInstanceId,
	}
	for _, mod := range mods {
		mod(model)
	}
	return model
}

func fixtureGetGrafanaConfigsRequest(mods ...func(request *observability.ApiGetGrafanaConfigsRequest)) observability.ApiGetGrafanaConfigsRequest {
	request := testClient.GetGrafanaConfigs(testCtx, testInstanceId, testProjectId)
	for _, mod := range mods {
		mod(&request)
	}
	return request
}

func fixtureGetInstanceRequest(mods ...func(request *observability.ApiGetInstanceRequest)) observability.ApiGetInstanceRequest {
	request := testClient.GetInstance(testCtx, testInstanceId, testProjectId)
	for _, mod := range mods {
		mod(&request)
	}
	return request
}

func TestParseInput(t *testing.T) {
	tests := []struct {
		description   string
		argValues     []string
		flagValues    map[string]string
		isValid       bool
		expectedModel *inputModel
	}{
		{
			description:   "base",
			argValues:     fixtureArgValues(),
			flagValues:    fixtureFlagValues(),
			isValid:       true,
			expectedModel: fixtureInputModel(),
		},
		{
			description: "no arg values",
			argValues:   []string{},
			flagValues:  fixtureFlagValues(),
			isValid:     false,
		},
		{
			description: "show password",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				flagValues[showPasswordFlag] = "true"
			}),
			isValid: true,
			expectedModel: fixtureInputModel(func(model *inputModel) {
				model.ShowPassword = true
			}),
		},
		{
			description: "no values",
			argValues:   []string{},
			flagValues:  map[string]string{},
			isValid:     false,
		},
		{
			description: "no flag values",
			argValues:   fixtureArgValues(),
			flagValues:  map[string]string{},
			isValid:     false,
		},
		{
			description: "project id missing",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				delete(flagValues, projectIdFlag)
			}),
			isValid: false,
		},
		{
			description: "project id invalid 1",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				flagValues[projectIdFlag] = ""
			}),
			isValid: false,
		},
		{
			description: "project id invalid 2",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				flagValues[projectIdFlag] = "invalid-uuid"
			}),
			isValid: false,
		},
		{
			description: "instance id invalid 1",
			argValues:   []string{""},
			flagValues:  fixtureFlagValues(),
			isValid:     false,
		},
		{
			description: "instance id invalid 2",
			argValues:   []string{"invalid-uuid"},
			flagValues:  fixtureFlagValues(),
			isValid:     false,
		},
		{
			description: "credentials id invalid 1",
			argValues:   []string{""},
			flagValues:  fixtureFlagValues(),
			isValid:     false,
		},
		{
			description: "credentials id invalid 2",
			argValues:   []string{"invalid-uuid"},
			flagValues:  fixtureFlagValues(),
			isValid:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.description, func(t *testing.T) {
			p := print.NewPrinter()
			cmd := NewCmd(&types.CmdParams{Printer: p})
			err := globalflags.Configure(cmd.Flags())
			if err != nil {
				t.Fatalf("configure global flags: %v", err)
			}

			for flag, value := range tt.flagValues {
				err := cmd.Flags().Set(flag, value)
				if err != nil {
					if !tt.isValid {
						return
					}
					t.Fatalf("setting flag --%s=%s: %v", flag, value, err)
				}
			}

			err = cmd.ValidateArgs(tt.argValues)
			if err != nil {
				if !tt.isValid {
					return
				}
				t.Fatalf("error validating args: %v", err)
			}

			err = cmd.ValidateRequiredFlags()
			if err != nil {
				if !tt.isValid {
					return
				}
				t.Fatalf("error validating flags: %v", err)
			}

			model, err := parseInput(p, cmd, tt.argValues)

			if err != nil {
				if !tt.isValid {
					return
				}
				t.Fatalf("error parsing input: %v", err)
			}

			if !tt.isValid {
				t.Fatalf("did not fail on invalid input")
			}
			diff := cmp.Diff(model, tt.expectedModel)
			if diff != "" {
				t.Fatalf("Data does not match: %s", diff)
			}
		})
	}
}

func TestBuildGetGrafanaConfigsRequest(t *testing.T) {
	tests := []struct {
		description     string
		model           *inputModel
		expectedRequest observability.ApiGetGrafanaConfigsRequest
	}{
		{
			description:     "base",
			model:           fixtureInputModel(),
			expectedRequest: fixtureGetGrafanaConfigsRequest(),
		},
	}

	for _, tt := range tests {
		t.Run(tt.description, func(t *testing.T) {
			request := buildGetGrafanaConfigRequest(testCtx, tt.model, testClient)

			diff := cmp.Diff(request, tt.expectedRequest,
				cmp.AllowUnexported(tt.expectedRequest),
				cmpopts.EquateComparable(testCtx),
			)
			if diff != "" {
				t.Fatalf("Data does not match: %s", diff)
			}
		})
	}
}

func TestBuildGetInstanceRequest(t *testing.T) {
	tests := []struct {
		description     string
		model           *inputModel
		expectedRequest observability.ApiGetInstanceRequest
	}{
		{
			description:     "base",
			model:           fixtureInputModel(),
			expectedRequest: fixtureGetInstanceRequest(),
		},
	}

	for _, tt := range tests {
		t.Run(tt.description, func(t *testing.T) {
			request := buildGetInstanceRequest(testCtx, tt.model, testClient)

			diff := cmp.Diff(request, tt.expectedRequest,
				cmp.AllowUnexported(tt.expectedRequest),
				cmpopts.EquateComparable(testCtx),
			)
			if diff != "" {
				t.Fatalf("Data does not match: %s", diff)
			}
		})
	}
}

func TestOutputResult(t *testing.T) {
	type args struct {
		outputFormat  string
		showPassword  bool
		grafanaConfig *observability.GrafanaConfigs
		instance      *observability.GetInstanceResponse
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
	}{
		{
			name:    "empty",
			args:    args{},
			wantErr: true,
		},
		{
			name: "set grafana configs but no instance",
			args: args{
				grafanaConfig: &observability.GrafanaConfigs{},
			},
			wantErr: true,
		},
		{
			name: "set instance but no grafana config",
			args: args{
				instance: &observability.GetInstanceResponse{
					Instance: &observability.InstanceSensitiveData{},
				},
			},
			wantErr: true,
		},
		{
			name: "set instance and grafana configs",
			args: args{
				grafanaConfig: &observability.GrafanaConfigs{},
				instance: &observability.GetInstanceResponse{
					Instance: &observability.InstanceSensitiveData{},
				},
			},
			wantErr: false,
		},
	}
	p := print.NewPrinter()
	p.Cmd = NewCmd(&types.CmdParams{Printer: p})
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if err := outputResult(p, tt.args.outputFormat, tt.args.showPassword, tt.args.grafanaConfig, tt.args.instance); (err != nil) != tt.wantErr {
				t.Errorf("outputResult() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}
