package describe

import (
	"context"
	"testing"
	"time"

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

	"github.com/google/go-cmp/cmp"
	"github.com/google/go-cmp/cmp/cmpopts"
	"github.com/google/uuid"
	"github.com/stackitcloud/stackit-cli/internal/pkg/globalflags"
	"github.com/stackitcloud/stackit-cli/internal/pkg/print"
	"github.com/stackitcloud/stackit-cli/internal/pkg/utils"
	"github.com/stackitcloud/stackit-sdk-go/services/postgresflex"
)

type testCtxKey struct{}

var testCtx = context.WithValue(context.Background(), testCtxKey{}, "foo")
var testClient = &postgresflex.APIClient{}
var testProjectId = uuid.NewString()
var testInstanceId = uuid.NewString()
var testBackupId = "backupID"
var testRegion = "eu01"

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

func fixtureFlagValues(mods ...func(flagValues map[string]string)) map[string]string {
	flagValues := map[string]string{
		globalflags.ProjectIdFlag: testProjectId,
		globalflags.RegionFlag:    testRegion,
		instanceIdFlag:            testInstanceId,
	}
	for _, mod := range mods {
		mod(flagValues)
	}
	return flagValues
}

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

func fixtureRequest(mods ...func(request *postgresflex.ApiGetBackupRequest)) postgresflex.ApiGetBackupRequest {
	request := testClient.GetBackup(testCtx, testProjectId, testRegion, testInstanceId, testBackupId)
	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 values",
			argValues:   []string{},
			flagValues:  map[string]string{},
			isValid:     false,
		},
		{
			description: "no arg values",
			argValues:   []string{},
			flagValues:  fixtureFlagValues(),
			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, globalflags.ProjectIdFlag)
			}),
			isValid: false,
		},
		{
			description: "project id invalid 1",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				flagValues[globalflags.ProjectIdFlag] = ""
			}),
			isValid: false,
		},
		{
			description: "project id invalid 2",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				flagValues[globalflags.ProjectIdFlag] = "invalid-uuid"
			}),
			isValid: false,
		},
		{
			description: "instance id missing",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				delete(flagValues, instanceIdFlag)
			}),
			isValid: false,
		},
		{
			description: "instance id invalid 1",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				flagValues[instanceIdFlag] = ""
			}),
			isValid: false,
		},
		{
			description: "instance id invalid 2",
			argValues:   fixtureArgValues(),
			flagValues: fixtureFlagValues(func(flagValues map[string]string) {
				flagValues[instanceIdFlag] = "invalid-uuid"
			}),
			isValid: false,
		},
		{
			description: "backup id invalid 1",
			argValues:   []string{""},
			flagValues:  fixtureFlagValues(),
			isValid:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.description, func(t *testing.T) {
			cmd := NewCmd(nil)
			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(nil, 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 TestBuildRequest(t *testing.T) {
	tests := []struct {
		description     string
		model           *inputModel
		expectedRequest postgresflex.ApiGetBackupRequest
	}{
		{
			description:     "base",
			model:           fixtureInputModel(),
			expectedRequest: fixtureRequest(),
		},
	}

	for _, tt := range tests {
		t.Run(tt.description, func(t *testing.T) {
			request := buildRequest(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 Test_outputResult(t *testing.T) {
	type args struct {
		outputFormat string
		backup       postgresflex.Backup
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
	}{
		{"empty", args{}, true},
		{"standard", args{outputFormat: "", backup: postgresflex.Backup{StartTime: utils.Ptr(time.Now().Format(time.RFC3339))}}, false},
		{"complete", args{outputFormat: "", backup: postgresflex.Backup{
			EndTime:   utils.Ptr(time.Now().Format(time.RFC3339)),
			Id:        utils.Ptr("id"),
			Labels:    &[]string{"foo", "bar", "baz"},
			Name:      utils.Ptr("name"),
			Options:   &map[string]string{"test1": "test1", "test2": "test2"},
			Size:      utils.Ptr(int64(42)),
			StartTime: utils.Ptr(time.Now().Format(time.RFC3339)),
		}}, 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.backup); (err != nil) != tt.wantErr {
				t.Errorf("outputResult() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}
