// Copyright (c) 2018, The Monero Project
//
// All rights reserved.
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// permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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#include "parse.h"

#include "net/tor_address.h"
#include "net/i2p_address.h"
#include "string_tools.h"

namespace net
{
    expect<epee::net_utils::network_address>
    get_network_address(const boost::string_ref address, const std::uint16_t default_port)
    {
        const boost::string_ref host = address.substr(0, address.rfind(':'));

        if (host.empty())
            return make_error_code(net::error::invalid_host);
        if (host.ends_with(".onion"))
            return tor_address::make(address, default_port);
        if (host.ends_with(".i2p"))
            return i2p_address::make(address, default_port);

        std::uint16_t port = default_port;
        if (host.size() < address.size())
        {
            if (!epee::string_tools::get_xtype_from_string(port, std::string{address.substr(host.size() + 1)}))
                return make_error_code(net::error::invalid_port);
        }

        std::uint32_t ip = 0;
        if (epee::string_tools::get_ip_int32_from_string(ip, std::string{host}))
            return {epee::net_utils::ipv4_network_address{ip, port}};
        return make_error_code(net::error::unsupported_address);
    }

    expect<epee::net_utils::ipv4_network_subnet>
    get_ipv4_subnet_address(const boost::string_ref address, bool allow_implicit_32)
    {
        uint32_t mask = 32;
        const boost::string_ref::size_type slash = address.find_first_of('/');
        if (slash != boost::string_ref::npos)
        {
            if (!epee::string_tools::get_xtype_from_string(mask, std::string{address.substr(slash + 1)}))
                return make_error_code(net::error::invalid_mask);
            if (mask > 32)
                return make_error_code(net::error::invalid_mask);
        }
        else if (!allow_implicit_32)
            return make_error_code(net::error::invalid_mask);

        std::uint32_t ip = 0;
        boost::string_ref S(address.data(), slash != boost::string_ref::npos ? slash : address.size());
        if (!epee::string_tools::get_ip_int32_from_string(ip, std::string(S)))
            return make_error_code(net::error::invalid_host);

        return {epee::net_utils::ipv4_network_subnet{ip, (uint8_t)mask}};
    }
}