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"""
Demonstrates how to configure the settings used when booting a virtual machine.

Sample Prerequisites:
The sample needs an existing VM.
"""

vm = None
vm_name = None
stub_config = None
boot_svc = None
cleardata = False
orig_boot_info = None

...

def run():
    global vm
    vm = get_vm(stub_config, vm_name)
    if not vm:
        exit('Sample requires an existing vm with name ({}). '
             'Please create the vm first.'.format(vm_name))
    print("Using VM '{}' ({}) for Boot Sample".format(vm_name, vm))

    # Create Boot stub used for making requests
    global boot_svc
    boot_svc = Boot(stub_config)

    print('\n# Example: Get current Boot configuration')
    boot_info = boot_svc.get(vm)
    print('vm.hardware.Boot.get({}) -> {}'.format(vm, pp(boot_info)))

    # Save current Boot info to verify that we have cleaned up properly
    global orig_boot_info
    orig_boot_info = boot_info

    print('\n# Example: Update firmware to EFI for Boot configuration')
    update_spec = Boot.UpdateSpec(type=Boot.Type.EFI)
    print('vm.hardware.Boot.update({}, {})'.format(vm, update_spec))
    boot_svc.update(vm, update_spec)
    boot_info = boot_svc.get(vm)
    print('vm.hardware.Boot.get({}) -> {}'.format(vm, pp(boot_info)))

    print('\n# Example: Update boot firmware to tell it to enter setup mode on '
          'next boot')
    update_spec = Boot.UpdateSpec(enter_setup_mode=True)
    print('vm.hardware.Boot.update({}, {})'.format(vm, update_spec))
    boot_svc.update(vm, update_spec)
    boot_info = boot_svc.get(vm)
    print('vm.hardware.Boot.get({}) -> {}'.format(vm, pp(boot_info)))

    print('\n# Example: Update boot firmware to introduce a delay in boot'
          ' process and to reboot')
    print('# automatically after a failure to boot. '
          '(delay=10000 ms, retry=True,')
    print('# retry_delay=30000 ms')
    update_spec = Boot.UpdateSpec(delay=10000,
                                  retry=True,
                                  retry_delay=30000)
    print('vm.hardware.Boot.update({}, {})'.format(vm, update_spec))
    boot_svc.update(vm, update_spec)
    boot_info = boot_svc.get(vm)
    print('vm.hardware.Boot.get({}) -> {}'.format(vm, pp(boot_info)))

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