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/// **************************************************************************
/// Copyright (c) 2016 Roland Ruckerbauer All Rights Reserved.
///
/// This file is part of msi_klm.
///
/// msi_klm is free software: you can redistribute it and/or modify
/// it under the terms of the GNU General Public License as published by
/// the Free Software Foundation, either version 3 of the License, or
/// (at your option) any later version.
///
/// msi_klm is distributed in the hope that it will be useful,
/// but WITHOUT ANY WARRANTY; without even the implied warranty of
/// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
/// GNU General Public License for more details.
///
/// You should have received a copy of the GNU General Public License
/// along with msi_klm.  If not, see <http://www.gnu.org/licenses/>.
/// *************************************************************************

extern crate hidapi as hidapi_rust;
extern crate libc;

pub use hidapi_rust::HidApi;
use hidapi_rust::HidDevice;
use libc::c_ushort;

const VENDOR_ID: c_ushort = 6000;
const PRODUCT_ID: c_ushort = 65280;

pub enum Area {
    Left,
    Middle,
    Right,
}

pub enum Mode {
    Reset = 7,
    Off = 0,
    Default = 1,
}

impl Area {
    pub fn to_number(self) -> u8 {
        match self {
            Area::Left => 1,
            Area::Middle => 2,
            Area::Right => 3,
        }
    }
}

#[derive(Default, Copy, Clone, Debug)]
pub struct Color {
    pub r: u8,
    pub g: u8,
    pub b: u8,
}

impl Color {
    pub fn new(r: u8, g: u8, b: u8) -> Color {
        Color { r: r, g: g, b: b }
    }
}

pub struct KeyboardLights<'a> {
    device: HidDevice<'a>,
}

impl<'a> KeyboardLights<'a> {
    pub fn from_hid_api(api: &'a HidApi) -> Result<KeyboardLights<'a>, &'static str> {
        let device = api.open(VENDOR_ID, PRODUCT_ID)?;
        Ok(KeyboardLights { device: device })
    }

    pub fn set_mode(&self, mode: Mode) {
        self.device.send_feature_report(&[1, 2, 65, mode as u8, 0, 0, 0, 0]).unwrap();
    }

    pub fn set_area(&self, area: Area, color: Color) {
        self.device
            .send_feature_report(&[1, 2, 64, area.to_number(), color.r, color.g, color.b, 0]).unwrap();
    }

    pub fn set_all(&self, color: Color) {
        for i in 1..4 {
            self.device.send_feature_report(&[1, 2, 64, i, color.r, color.g, color.b, 0]).unwrap();
        }
    }
}