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/// Contains the epoll code to read from the device when the worker thread is woken up by the
/// kernel upon new data to consume
pub mod ev;

/// Contains the code to decode Wacom events
pub mod wacom;

/// Contains the code to decode physical button events
pub mod gpio;

/// Contains the code to decode multitouch events
pub mod multitouch;

#[derive(PartialEq, Copy, Clone)]
pub enum InputDevice {
    Wacom,
    Multitouch,
    GPIO,
    Unknown,
}

#[derive(PartialEq, Clone)]
pub enum InputEvent {
    WacomEvent { event: wacom::WacomEvent },
    MultitouchEvent { event: multitouch::MultitouchEvent },
    GPIO { event: gpio::GPIOEvent },
    Unknown {},
}

impl Default for InputEvent {
    fn default() -> InputEvent {
        InputEvent::Unknown {}
    }
}

use evdev;
use std;

/// Trait to implement to be dispatched evdev events by the `start_evdev` function
pub trait EvdevHandler {
    fn on_init(&mut self, path: String);
    fn on_event(&mut self, device: InputDevice, event: evdev::raw::input_event);
}

unsafe impl Send for UnifiedInputHandler {}
unsafe impl Sync for UnifiedInputHandler {}

pub struct UnifiedInputHandler {
    pub wacom: wacom::WacomState,
    pub gpio: gpio::GPIOState,
    pub mt: multitouch::MultitouchState,
    pub tx: std::sync::mpsc::Sender<InputEvent>,
    pub rx: std::sync::mpsc::Receiver<InputEvent>,
}

impl UnifiedInputHandler {
    pub fn new() -> UnifiedInputHandler {
        let (tx, rx) = std::sync::mpsc::channel();
        UnifiedInputHandler {
            gpio: gpio::GPIOState::new(),
            wacom: wacom::WacomState::new(),
            mt: multitouch::MultitouchState::new(),
            rx,
            tx,
        }
    }

    pub fn get_producer(&mut self) -> &mut std::sync::mpsc::Sender<InputEvent> {
        &mut self.tx
    }

    pub fn get_consumer(&self) -> &std::sync::mpsc::Receiver<InputEvent> {
        &self.rx
    }
}

impl<'a> EvdevHandler for UnifiedInputHandler {
    fn on_init(&mut self, path: String) {
        info!("Input device at path '{0}' EPOLL initialized", path);
    }

    fn on_event(&mut self, device: InputDevice, ev: evdev::raw::input_event) {
        match device {
            InputDevice::Wacom => self.wacom_handler(&ev),
            InputDevice::Multitouch => self.multitouch_handler(&ev),
            InputDevice::GPIO => self.gpio_handler(&ev),
            _ => {}
        }
    }
}