use super::{NSButton, NSResponder};
use bitflags::bitflags;
use objc2::foundation::{NSInteger, NSObject, NSUInteger};
use objc2::{
    extern_class, extern_methods, msg_send_id,
    rc::{Id, Shared},
    ClassType, Encode, Encoding,
};

extern_class!(
    #[derive(Debug, PartialEq, Eq, Hash)]
    pub(crate) struct NSWindow;

    unsafe impl ClassType for NSWindow {
        #[inherits(NSObject)]
        type Super = NSResponder;
    }
);

extern_methods!(
    unsafe impl NSWindow {
        #[sel(styleMask)]
        pub(crate) fn style_mask(&self) -> NSWindowStyleMask;

        #[sel(setStyleMask:)]
        pub(crate) fn set_style_mask(&self, mask: NSWindowStyleMask);

        #[sel(setTitleVisibility:)]
        pub(crate) fn set_title_visibility(&self, visibility: NSWindowTitleVisibility);

        #[sel(setTitlebarAppearsTransparent:)]
        pub(crate) fn set_titlebar_appears_transparent(&self, val: bool);

        #[sel(setMovableByWindowBackground:)]
        pub(crate) fn set_movable_by_window_background(&self, val: bool);

        pub(crate) fn standard_window_button(
            &self,
            kind: NSWindowButton,
        ) -> Option<Id<NSButton, Shared>> {
            unsafe { msg_send_id![self, standardWindowButton: kind] }
        }
    }
);

bitflags! {
    pub struct NSWindowStyleMask: NSUInteger {
        #[doc(alias = "NSWindowStyleMaskBorderless")]
        const BORDERLESS = 0;
        #[doc(alias = "NSWindowStyleMaskTitled")]
        const TITLED = 1 << 0;
        #[doc(alias = "NSWindowStyleMaskClosable")]
        const CLOSABLE = 1 << 1;
        #[doc(alias = "NSWindowStyleMaskMiniaturizable")]
        const MINIATURIZABLE = 1 << 2;
        #[doc(alias = "NSWindowStyleMaskResizable")]
        const RESIZABLE = 1 << 3;
        #[deprecated = "Deprecated since macOS 10.2"]
        #[doc(alias = "NSWindowStyleMaskTexturedBackground")]
        const TEXTURED_BACKGROUND = 1 << 8;
        #[doc(alias = "NSWindowStyleMaskUnifiedTitleAndToolbar")]
        const UNIFIED_TITLE_AND_TOOLBAR = 1 << 12;
        #[doc(alias = "NSWindowStyleMaskFullScreen")]
        const FULLSCREEN = 1 << 14;
        #[doc(alias = "NSWindowStyleMaskFullSizeContentView")]
        const FULL_SIZE_CONTENT_VIEW = 1 << 15;
    }
}

unsafe impl Encode for NSWindowStyleMask {
    const ENCODING: Encoding = NSUInteger::ENCODING;
}

#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
#[repr(isize)] // NSInteger
#[allow(unused)]
pub enum NSWindowTitleVisibility {
    #[doc(alias = "NSWindowTitleVisible")]
    Visible = 0,
    #[doc(alias = "NSWindowTitleHidden")]
    Hidden = 1,
}

unsafe impl Encode for NSWindowTitleVisibility {
    const ENCODING: Encoding = NSInteger::ENCODING;
}

#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
#[repr(usize)] // NSUInteger
#[allow(unused)]
pub enum NSWindowButton {
    #[doc(alias = "NSWindowCloseButton")]
    Close = 0,
    #[doc(alias = "NSWindowMiniaturizeButton")]
    Miniaturize = 1,
    #[doc(alias = "NSWindowZoomButton")]
    Zoom = 2,
    #[doc(alias = "NSWindowToolbarButton")]
    Toolbar = 3,
    #[doc(alias = "NSWindowDocumentIconButton")]
    DocumentIcon = 4,
    #[doc(alias = "NSWindowDocumentVersionsButton")]
    DocumentVersions = 6,
    #[doc(alias = "NSWindowFullScreenButton")]
    #[deprecated = "Deprecated since macOS 10.12"]
    FullScreen = 7,
}

unsafe impl Encode for NSWindowButton {
    const ENCODING: Encoding = NSUInteger::ENCODING;
}