//
// Copyright 2010-2011 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//

#pragma once

#include <uhd/config.hpp>
#include <uhd/types/dict.hpp>
#include <uhd/utils/cast.hpp>
#include <algorithm>
#include <map>
#include <stdexcept>
#include <string>
#include <vector>

namespace uhd {

/*!
 * Mapping of key/value pairs for locating devices on the system.
 * When left empty, the device discovery routines will search
 * all available transports on the system (ethernet, usb...).
 *
 * To narrow down the discovery process to a particular device,
 * specify a transport key/value pair specific to your device.
 * - Ex, to find a usrp2: my_dev_addr["addr"] = [resolvable_hostname_or_ip]
 *
 * The device address can also be used to pass arguments into
 * the transport layer control to set (for example) buffer sizes.
 *
 * An arguments string, is a way to represent a device address
 * using a single string with delimiter characters.
 * - Ex: addr=192.168.10.2
 * - Ex: addr=192.168.10.2, recv_buff_size=1e6
 */
class UHD_API device_addr_t : public dict<std::string, std::string>
{
public:
    /*!
     * Create a device address from an args string.
     * \param args the arguments string
     */
    device_addr_t(const std::string& args = "");

    /*!
     * Create a device address from an args string.
     * \param args the arguments string
     */
    device_addr_t(const char* args);

    /*!
     * Create a device address from a std::map
     * \param info the device info map
     */
    device_addr_t(const std::map<std::string, std::string>& info);

    /*!
     * Convert a device address into a pretty print string.
     * \return a printable string representing the device address
     */
    std::string to_pp_string(void) const;

    /*!
     * Convert the device address into an args string.
     * The args string contains delimiter symbols.
     * \return a string with delimiter markup
     */
    std::string to_string(void) const;

    /*!
     * Lexically cast a parameter to the specified type,
     * or use the default value if the key is not found.
     * \param key the key as one of the address parameters
     * \param def the value to use when key is not present
     * \return the casted value as type T or the default
     * \throw error when the parameter cannot be casted
     */
    template <typename T>
    T cast(const std::string& key, const T& def) const
    {
        if (not this->has_key(key))
            return def;
        try {
            return uhd::cast::from_str<T>((*this)[key]);
        } catch (const uhd::runtime_error&) {
            throw std::runtime_error("cannot cast " + key + " = " + (*this)[key]);
        }
    }
};

//! A typedef for a vector of device addresses
typedef std::vector<device_addr_t> device_addrs_t;

//! Separate an indexed device address into a vector of device addresses
UHD_API device_addrs_t separate_device_addr(const device_addr_t& dev_addr);

//! Combine a vector of device addresses into an indexed device address
UHD_API device_addr_t combine_device_addrs(const device_addrs_t& dev_addrs);

} // namespace uhd
