//go:build amd64 || arm64
// +build amd64 arm64

package machine

import (
	"fmt"

	"github.com/containers/podman/v4/cmd/podman/registry"
	"github.com/containers/podman/v4/libpod/events"
	"github.com/containers/podman/v4/pkg/machine"
	"github.com/spf13/cobra"
)

var (
	startCmd = &cobra.Command{
		Use:               "start [options] [MACHINE]",
		Short:             "Start an existing machine",
		Long:              "Start a managed virtual machine ",
		PersistentPreRunE: rootlessOnly,
		RunE:              start,
		Args:              cobra.MaximumNArgs(1),
		Example:           `podman machine start myvm`,
		ValidArgsFunction: autocompleteMachine,
	}
	startOpts = machine.StartOptions{}
)

func init() {
	registry.Commands = append(registry.Commands, registry.CliCommand{
		Command: startCmd,
		Parent:  machineCmd,
	})

	flags := startCmd.Flags()
	noInfoFlagName := "no-info"
	flags.BoolVar(&startOpts.NoInfo, noInfoFlagName, false, "Suppress informational tips")

	quietFlagName := "quiet"
	flags.BoolVarP(&startOpts.Quiet, quietFlagName, "q", false, "Suppress machine starting status output")
}

func start(_ *cobra.Command, args []string) error {
	var (
		err error
		vm  machine.VM
	)

	startOpts.NoInfo = startOpts.Quiet || startOpts.NoInfo

	vmName := defaultMachineName
	if len(args) > 0 && len(args[0]) > 0 {
		vmName = args[0]
	}

	provider := GetSystemDefaultProvider()
	vm, err = provider.LoadVMByName(vmName)
	if err != nil {
		return err
	}

	active, activeName, cerr := provider.CheckExclusiveActiveVM()
	if cerr != nil {
		return cerr
	}
	if active {
		if vmName == activeName {
			return fmt.Errorf("cannot start VM %s: %w", vmName, machine.ErrVMAlreadyRunning)
		}
		return fmt.Errorf("cannot start VM %s. VM %s is currently running or starting: %w", vmName, activeName, machine.ErrMultipleActiveVM)
	}
	if !startOpts.Quiet {
		fmt.Printf("Starting machine %q\n", vmName)
	}
	if err := vm.Start(vmName, startOpts); err != nil {
		return err
	}
	fmt.Printf("Machine %q started successfully\n", vmName)
	newMachineEvent(events.Start, events.Event{Name: vmName})
	return nil
}