// Package bootenv provides a platform-independent interface for managing
// A/B boot environments. It abstracts GRUB (x86_64) and RPi firmware
// (ARM64) behind a common interface.
package bootenv

// BootEnv provides read/write access to A/B boot environment variables.
type BootEnv interface {
	// ActiveSlot returns the currently active boot slot ("A" or "B").
	ActiveSlot() (string, error)
	// PassiveSlot returns the currently passive boot slot.
	PassiveSlot() (string, error)
	// BootCounter returns the current boot counter value.
	BootCounter() (int, error)
	// BootSuccess returns whether the last boot was marked successful.
	BootSuccess() (bool, error)
	// MarkBootSuccess marks the current boot as successful.
	MarkBootSuccess() error
	// ActivateSlot switches the active boot slot and resets the counter.
	ActivateSlot(slot string) error
	// ForceRollback switches to the other slot immediately.
	ForceRollback() error
}

const (
	SlotA = "A"
	SlotB = "B"
)