use cocoa::appkit::{
    NSEvent,
    NSEventModifierFlags,
    NSEventSubtype::NSScreenChangedEventType,
    NSEventType::NSSystemDefined,
};
use cocoa::base::nil;
use cocoa::foundation::NSPoint;
use core_graphics::event::{CGEvent, CGEventTapLocation, CGKeyCode, KeyCode};

// impl KeyCode {
//     pub const RETURN: CGKeyCode = 0x24;
//     pub const TAB: CGKeyCode = 0x30;
//     pub const SPACE: CGKeyCode = 0x31;
//     pub const DELETE: CGKeyCode = 0x33;
//     pub const ESCAPE: CGKeyCode = 0x35;
//     pub const COMMAND: CGKeyCode = 0x37;
//     pub const SHIFT: CGKeyCode = 0x38;
//     pub const CAPS_LOCK: CGKeyCode = 0x39;
//     pub const OPTION: CGKeyCode = 0x3A;
//     pub const CONTROL: CGKeyCode = 0x3B;
//     pub const RIGHT_COMMAND: CGKeyCode = 0x36;
//     pub const RIGHT_SHIFT: CGKeyCode = 0x3C;
//     pub const RIGHT_OPTION: CGKeyCode = 0x3D;
//     pub const RIGHT_CONTROL: CGKeyCode = 0x3E;
//     pub const FUNCTION: CGKeyCode = 0x3F;
//     pub const VOLUME_UP: CGKeyCode = 0x48;
//     pub const VOLUME_DOWN: CGKeyCode = 0x49;
//     pub const MUTE: CGKeyCode = 0x4A;
// }

//   kVK_F13                       = 0x69,
//   kVK_F14                       = 0x6B,
//   kVK_F15                       = 0x71,
//   kVK_F16                       = 0x6A,
//   kVK_F17                       = 0x40,
//   kVK_F18                       = 0x4F,
//   kVK_F19                       = 0x50,
//   kVK_F20                       = 0x5A,
//
// enum {
//   kVK_Return                    = 0x24,
//   kVK_Tab                       = 0x30,
//   kVK_Space                     = 0x31,
//   kVK_Delete                    = 0x33,
//   kVK_Escape                    = 0x35,
//   kVK_Command                   = 0x37,
//   kVK_Shift                     = 0x38,
//   kVK_CapsLock                  = 0x39,
//   kVK_Option                    = 0x3A,
//   kVK_Control                   = 0x3B,
//   kVK_RightCommand              = 0x36,
//   kVK_RightShift                = 0x3C,
//   kVK_RightOption               = 0x3D,
//   kVK_RightControl              = 0x3E,
//   kVK_Function                  = 0x3F,
//   kVK_F17                       = 0x40,
//   kVK_VolumeUp                  = 0x48,
//   kVK_VolumeDown                = 0x49,
//   kVK_Mute                      = 0x4A,
//   kVK_F18                       = 0x4F,
//   kVK_F19                       = 0x50,
//   kVK_F20                       = 0x5A,
//   kVK_F5                        = 0x60,
//   kVK_F6                        = 0x61,
//   kVK_F7                        = 0x62,
//   kVK_F3                        = 0x63,
//   kVK_F8                        = 0x64,
//   kVK_F9                        = 0x65,
//   kVK_F11                       = 0x67,
//   kVK_F13                       = 0x69,
//   kVK_F16                       = 0x6A,
//   kVK_F14                       = 0x6B,
//   kVK_F10                       = 0x6D,
//   kVK_F12                       = 0x6F,
//   kVK_F15                       = 0x71,
//   kVK_Help                      = 0x72,
//   kVK_Home                      = 0x73,
//   kVK_PageUp                    = 0x74,
//   kVK_ForwardDelete             = 0x75,
//   kVK_F4                        = 0x76,
//   kVK_End                       = 0x77,
//   kVK_F2                        = 0x78,
//   kVK_PageDown                  = 0x79,
//   kVK_F1                        = 0x7A,
//   kVK_LeftArrow                 = 0x7B,
//   kVK_RightArrow                = 0x7C,
//   kVK_DownArrow                 = 0x7D,
//   kVK_UpArrow                   = 0x7E
// };



    // unsafe fn otherEventWithType_location_modifierFlags_timestamp_windowNumber_context_subtype_data1_data2_(
    //     _: Self,
    //     eventType: NSEventType,
    //     location: NSPoint,
    //     modifierFlags: NSEventModifierFlags,
    //     timestamp: NSTimeInterval,
    //     windowNumber: NSInteger,
    //     context: id /* (NSGraphicsContext *) */,
    //     subtype: NSEventSubtype,
    //     data1: NSInteger,
    //     data2: NSInteger) -> id /* (NSEvent *) */


// https://stackoverflow.com/questions/11045814/emulate-media-key-press-on-mac/11048135#11048135
// https://stackoverflow.com/questions/10459085/cocoa-simulate-macbook-upper-keys-multimedia-keys/50574159#50574159
unsafe fn press_play() {
    let NX_KEYTYPE_PLAY = 16;
    let code = NX_KEYTYPE_PLAY;

    let key_down = NSEvent::otherEventWithType_location_modifierFlags_timestamp_windowNumber_context_subtype_data1_data2_(
        nil,
        NSSystemDefined,
        NSPoint::new(0.0, 0.0),
        NSEventModifierFlags::NSDeviceIndependentModifierFlagsMask,
        0.0,
        0,
        nil,
        NSScreenChangedEventType,
        (code << 16 as i32) | (0xa << 8 as i32),
        -1
    );
    let event = key_down.CGEvent() as *mut CGEvent;
    let event = &*event;
    event.post(CGEventTapLocation::HID);

    let key_up = NSEvent::otherEventWithType_location_modifierFlags_timestamp_windowNumber_context_subtype_data1_data2_(
        nil,
        NSSystemDefined,
        NSPoint::new(0.0, 0.0),
        NSEventModifierFlags::NSDeviceIndependentModifierFlagsMask,
        0.0,
        0,
        nil,
        NSScreenChangedEventType,
        (code << 16 as i32) | (0xb << 8 as i32),
        -1
    );
    let event = key_down.CGEvent() as *mut CGEvent;
    let event = &*event;
    event.post(CGEventTapLocation::HID);
}


#[cfg(test)]
mod tests {
    #[test]
    fn send_media_key_event() {
        press_play();
    }
}