/*****************************************************************************
 * Module: DasKeyboard
 * Created On: Fri 07 May 2021 10:17:24 PM CEST
 * Last Modified: Fri 07 May 2021 11:28:01 PM CEST
 *
 * Driver for DasKeyboard keyboards light
 * Jali <jali@orca-central.de>
 *****************************************************************************/

use std::ffi::{CStr, CString};
use hidapi::{DeviceInfo, HidApi, HidError, HidResult};

/** Driver for DasKeyboard RGB keyboards
 *  lighting controller
 */
pub struct DasKeyboardController {
    dev: DeviceInfo,
    location: CString,
    use_traditional_send_data: bool,
    version: String,
}

/** Implementation of the controller. */
impl DasKeyboardController {
    /**
     * Creates a new instance of ```DasKeyboardController```, which is
     * bound to a currently connected device.
     *
     * # Arguments
     *
     * * `vendor_id` - The unique vendor/manufactorer id of the device
     * * `product_id` - The unique product id of the device.
     */
    pub fn new(vendor_id: u16, product_id: u16) -> HidResult<DasKeyboardController> {
        match HidApi::new() {
            Ok(api) => {
                let device = api.device_list()
                    .find(d => d.vendor_id() == vendor_id && d.product_id() == product_id);

                match device {                    
                    Some(d) => {
                        let c = DasKeyboardController {
                            dev      = d,
                            location = d.path()
                        };
                        Ok(c)
                    },
                    None => {
                        Err(HidApiError("Could not open device"))
                    }
                }
            },
            Err(e) => {
                e
            }
        }
    }
}