//
// Copyright 2010 Ettus Research LLC
//
// This program 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.
//
// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
//

#include <unistd.h>
#include <boost/format.hpp>
#include "usrp1e_impl.hpp"

using namespace uhd;
using namespace uhd::usrp;

/***********************************************************************
 * Helper Functions
 **********************************************************************/
static bool file_exists(const std::string &file_path){
    return access(file_path.c_str(), F_OK) == 0;
}

/***********************************************************************
 * Discovery
 **********************************************************************/
device_addrs_t usrp1e::discover(const device_addr_t &device_addr){
    device_addrs_t usrp1e_addrs;

    //if a node was provided, use it and only it
    if (device_addr.has_key("node")){
        if (not file_exists(device_addr["node"])) return usrp1e_addrs;
        device_addr_t new_addr;
        new_addr["name"] = "USRP1E";
        new_addr["type"] = "usrp1e";
        new_addr["node"] = device_addr["node"];
        usrp1e_addrs.push_back(new_addr);
    }

    //otherwise look for a few nodes at small indexes
    else{
        for(size_t i = 0; i < 5; i++){
            std::string node = str(boost::format("/dev/usrp1_e%d") % i);
            if (not file_exists(node)) continue;
            device_addr_t new_addr;
            new_addr["name"] = "USRP1E";
            new_addr["type"] = "usrp1e";
            new_addr["node"] = node;
            usrp1e_addrs.push_back(new_addr);
        }
    }

    return usrp1e_addrs;
}

/***********************************************************************
 * Make
 **********************************************************************/
device::sptr usrp1e::make(const device_addr_t &){
    throw std::runtime_error("not implemented yet");
}