///////////////////////////////////////////////////////////////////////
// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
///////////////////////////////////////////////////////////////////////

package cmd

import (
	"fmt"
	"io"

	"github.com/vmware/dispatch/pkg/api/v1"
	"github.com/vmware/dispatch/pkg/client"
	"golang.org/x/net/context"

	"github.com/spf13/cobra"

	"github.com/vmware/dispatch/pkg/dispatchcli/i18n"
)

var (
	deleteEventDriverLong = i18n.T(`Delete event driver`)

	// TODO: add examples
	deleteEventDriverExample = i18n.T(``)
)

// NewCmdDeleteEventDriver creates command responsible for deleting EventDriver.
func NewCmdDeleteEventDriver(out io.Writer, errOut io.Writer) *cobra.Command {
	cmd := &cobra.Command{
		Use:     "eventdriver DRIVER_NAME",
		Short:   i18n.T("Delete EventDriver"),
		Long:    deleteEventDriverLong,
		Example: deleteEventDriverExample,
		Args:    cobra.ExactArgs(1),
		Aliases: []string{"eventdrivers", "event-driver", "event-drivers"},
		Run: func(cmd *cobra.Command, args []string) {
			c := eventManagerClient()
			err := deleteEventDriver(out, errOut, cmd, args, c)
			CheckErr(err)
		},
	}
	return cmd
}

// CallDeleteEventDriver makes the API call to delete an event driver
func CallDeleteEventDriver(c client.EventsClient) ModelAction {
	return func(i interface{}) error {
		ev := i.(*v1.EventDriver)

		deleted, err := c.DeleteEventDriver(context.TODO(), "", *ev.Name)
		if err != nil {
			return err
		}
		*ev = *deleted
		return nil
	}
}

func deleteEventDriver(out, errOut io.Writer, cmd *cobra.Command, args []string, c client.EventsClient) error {
	driverModel := v1.EventDriver{
		Name: &args[0],
	}
	err := CallDeleteEventDriver(c)(&driverModel)
	if err != nil {
		return err
	}
	return formatDeleteEventDriverOutput(out, false, []*v1.EventDriver{&driverModel})
}

func formatDeleteEventDriverOutput(out io.Writer, list bool, drivers []*v1.EventDriver) error {
	if w, err := formatOutput(out, list, drivers); w {
		return err
	}
	for _, d := range drivers {
		_, err := fmt.Fprintf(out, "Deleted drivers: %s\n", *d.Name)
		if err != nil {
			return err
		}
	}
	return nil
}