use crate::process::ProcessId;
use crate::task::{TaskId, TaskState};

pub const DEFAULT_GAME_PAUSE_BUDGET_TICKS: u8 = 1;

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum GameLifecycleEventKind {
    Pause,
    ResumeForeground,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct GameLifecycleEvent {
    pub task_id: TaskId,
    pub kind: GameLifecycleEventKind,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum LifecycleOperation {
    SetForeground,
    Suspend,
    Resume,
    Close,
    Crash,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum LifecycleError {
    TaskNotFound(TaskId),
    ProcessNotFound(ProcessId),
    InvalidTransition { task_id: TaskId, from: TaskState, operation: LifecycleOperation },
    ResidentGameAlreadyExists { existing: TaskId, requested: TaskId },
    ForegroundShellAlreadyExists { existing: TaskId, requested: TaskId },
    TaskIsNotResidentGame(TaskId),
}