package create

import (
	"context"
	"fmt"

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

	"github.com/stackitcloud/stackit-cli/internal/pkg/args"
	"github.com/stackitcloud/stackit-cli/internal/pkg/errors"
	"github.com/stackitcloud/stackit-cli/internal/pkg/examples"
	"github.com/stackitcloud/stackit-cli/internal/pkg/flags"
	"github.com/stackitcloud/stackit-cli/internal/pkg/globalflags"
	"github.com/stackitcloud/stackit-cli/internal/pkg/print"
	"github.com/stackitcloud/stackit-cli/internal/pkg/projectname"
	"github.com/stackitcloud/stackit-cli/internal/pkg/services/service-account/client"
	"github.com/stackitcloud/stackit-cli/internal/pkg/utils"

	"github.com/spf13/cobra"
	"github.com/stackitcloud/stackit-sdk-go/services/serviceaccount"
)

const (
	nameFlag = "name"
)

type inputModel struct {
	*globalflags.GlobalFlagModel
	Name *string
}

func NewCmd(params *types.CmdParams) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "create",
		Short: "Creates a service account",
		Long:  "Creates a service account.",
		Args:  args.NoArgs,
		Example: examples.Build(
			examples.NewExample(
				`Create a service account with name "my-service-account"`,
				"$ stackit service-account create --name my-service-account"),
		),
		RunE: func(cmd *cobra.Command, args []string) error {
			ctx := context.Background()
			model, err := parseInput(params.Printer, cmd, args)
			if err != nil {
				return err
			}

			// Configure API client
			apiClient, err := client.ConfigureClient(params.Printer, params.CliVersion)
			if err != nil {
				return err
			}

			projectLabel, err := projectname.GetProjectName(ctx, params.Printer, params.CliVersion, cmd)
			if err != nil {
				params.Printer.Debug(print.ErrorLevel, "get project name: %v", err)
				projectLabel = model.ProjectId
			}

			prompt := fmt.Sprintf("Are you sure you want to create a service account for project %q?", projectLabel)
			err = params.Printer.PromptForConfirmation(prompt)
			if err != nil {
				return err
			}

			// Call API
			req := buildRequest(ctx, model, apiClient)
			resp, err := req.Execute()
			if err != nil {
				return fmt.Errorf("create service account: %w", err)
			}

			return outputResult(params.Printer, model.OutputFormat, projectLabel, resp)
		},
	}
	configureFlags(cmd)
	return cmd
}

func configureFlags(cmd *cobra.Command) {
	cmd.Flags().StringP(nameFlag, "n", "", "Service account name. A unique email will be generated from this name")

	err := flags.MarkFlagsRequired(cmd, nameFlag)
	cobra.CheckErr(err)
}

func parseInput(p *print.Printer, cmd *cobra.Command, _ []string) (*inputModel, error) {
	globalFlags := globalflags.Parse(p, cmd)
	if globalFlags.ProjectId == "" {
		return nil, &errors.ProjectIdError{}
	}

	model := inputModel{
		GlobalFlagModel: globalFlags,
		Name:            flags.FlagToStringPointer(p, cmd, nameFlag),
	}

	p.DebugInputModel(model)
	return &model, nil
}

func buildRequest(ctx context.Context, model *inputModel, apiClient *serviceaccount.APIClient) serviceaccount.ApiCreateServiceAccountRequest {
	req := apiClient.CreateServiceAccount(ctx, model.ProjectId)
	req = req.CreateServiceAccountPayload(serviceaccount.CreateServiceAccountPayload{
		Name: model.Name,
	})
	return req
}

func outputResult(p *print.Printer, outputFormat, projectLabel string, serviceAccount *serviceaccount.ServiceAccount) error {
	if serviceAccount == nil {
		return fmt.Errorf("service account is nil")
	}

	return p.OutputResult(outputFormat, serviceAccount, func() error {
		p.Outputf("Created service account for project %q. Email: %s\n", projectLabel, utils.PtrString(serviceAccount.Email))
		return nil
	})
}
