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#[cfg(target_os = "linux")]
mod linux;
#[cfg(target_os = "macos")]
mod macos;
#[cfg(target_os = "windows")]
mod windows;

mod traits;
pub use traits::{HotkeyError, HotkeyListener, ListenerHotkey};

#[cfg(target_os = "linux")]
pub use linux::keys;
#[cfg(target_os = "linux")]
pub use linux::modifiers;
#[cfg(target_os = "linux")]
pub use linux::Listener;

#[cfg(target_os = "macos")]
pub use macos::keys;
#[cfg(target_os = "macos")]
pub use macos::modifiers;
#[cfg(target_os = "macos")]
pub use macos::Listener;

#[cfg(target_os = "windows")]
pub use windows::keys;
#[cfg(target_os = "windows")]
pub use windows::modifiers;
#[cfg(target_os = "windows")]
pub use windows::Listener;

#[cfg(test)]
mod tests {
  use super::*;

  #[test]
  fn register_unregister_hotkey_test() {
    let mut listener = Listener::new();
    assert_eq!(listener.registered_hotkeys().len(), 0);
    let hotkey1 = ListenerHotkey::new(modifiers::ALT, keys::A);
    assert_eq!(listener.register_hotkey(hotkey1, || {}), Ok(()));
    assert_eq!(listener.registered_hotkeys()[0], hotkey1);
    assert_eq!(listener.registered_hotkeys().len(), 1);
    let hotkey2 = ListenerHotkey::new(modifiers::CONTROL, keys::B);
    assert_eq!(listener.register_hotkey(hotkey2, || {}), Ok(()));
    assert!(listener.registered_hotkeys().iter().any(|h| *h == hotkey1));
    assert!(listener.registered_hotkeys().iter().any(|h| *h == hotkey2));
    assert_eq!(listener.registered_hotkeys().len(), 2);
    assert_eq!(listener.unregister_hotkey(hotkey1), Ok(()));
    assert_eq!(listener.registered_hotkeys().len(), 1);
    assert_eq!(listener.registered_hotkeys()[0], hotkey2);
    assert_eq!(listener.unregister_hotkey(hotkey2), Ok(()));
    assert_eq!(listener.registered_hotkeys().len(), 0);
    let hotkey3 = ListenerHotkey::new(
      modifiers::CONTROL | modifiers::SUPER | modifiers::ALT,
      keys::P,
    );
    assert_eq!(listener.register_hotkey(hotkey3, || {}), Ok(()));
    assert_eq!(listener.registered_hotkeys()[0], hotkey3);
    assert_eq!(listener.registered_hotkeys().len(), 1);
    assert_eq!(listener.unregister_hotkey(hotkey3), Ok(()));
    assert_eq!(listener.registered_hotkeys().len(), 0);
    assert_eq!(listener.register_hotkey(hotkey1, || {}), Ok(()));
    assert_eq!(listener.registered_hotkeys()[0], hotkey1);
    assert_eq!(listener.registered_hotkeys().len(), 1);
    assert_eq!(listener.unregister_hotkey(hotkey1), Ok(()));
    assert_eq!(listener.registered_hotkeys().len(), 0);
  }

  #[test]
  fn unregister_invalid_hotkey_test() {
    let mut listener = Listener::new();
    assert_eq!(listener.registered_hotkeys().len(), 0);
    let hotkey = ListenerHotkey::new(modifiers::ALT, keys::A);
    assert_eq!(
      listener.unregister_hotkey(hotkey),
      Err(HotkeyError::HotkeyNotRegistered(hotkey))
    );
    assert_eq!(listener.registered_hotkeys().len(), 0);
  }

  #[test]
  fn reregister_hotkey_test() {
    let mut listener = Listener::new();
    assert_eq!(listener.registered_hotkeys().len(), 0);
    let hotkey = ListenerHotkey::new(modifiers::ALT, keys::B);
    assert_eq!(listener.register_hotkey(hotkey, || {}), Ok(()));
    assert_eq!(listener.registered_hotkeys()[0], hotkey);
    assert_eq!(listener.registered_hotkeys().len(), 1);
    assert_eq!(
      listener.register_hotkey(hotkey, || {}),
      Err(HotkeyError::HotkeyAlreadyRegistered(hotkey))
    );
    assert_eq!(listener.registered_hotkeys()[0], hotkey);
    assert_eq!(listener.registered_hotkeys().len(), 1);
    assert_eq!(listener.unregister_hotkey(hotkey), Ok(()));
    assert_eq!(listener.registered_hotkeys().len(), 0);
  }
}