// Copyright Daniel Wallin 2006. Use, modification and distribution is
// subject to the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#include "boost_python.hpp"
#include <memory>

#include "libtorrent/torrent_info.hpp"
#include "libtorrent/session_settings.hpp"
#include "libtorrent/time.hpp"
#include "libtorrent/socket_io.hpp"
#include "libtorrent/announce_entry.hpp"
#include "bytes.hpp"

#ifdef _MSC_VER
#pragma warning(push)
// warning C4996: X: was declared deprecated
#pragma warning( disable : 4996 )
#endif

using namespace boost::python;
using namespace libtorrent;

namespace
{

    std::vector<announce_entry>::const_iterator begin_trackers(torrent_info& i)
    {
        return i.trackers().begin();
    }

    std::vector<announce_entry>::const_iterator end_trackers(torrent_info& i)
    {
        return i.trackers().end();
    }

    void add_node(torrent_info& ti, char const* hostname, int port)
    {
        ti.add_node(std::make_pair(hostname, port));
    }

    list nodes(torrent_info const& ti)
    {
        list result;

        for (auto const& i : ti.nodes())
            result.append(boost::python::make_tuple(i.first, i.second));

        return result;
    }

    list get_web_seeds(torrent_info const& ti)
    {
        std::vector<web_seed_entry> const& ws = ti.web_seeds();
        list ret;
        for (std::vector<web_seed_entry>::const_iterator i = ws.begin()
            , end(ws.end()); i != end; ++i)
        {
            dict d;
            d["url"] = i->url;
            d["type"] = i->type;
            d["auth"] = i->auth;
            d["extra_headers"] = i->extra_headers;
            ret.append(d);
        }

        return ret;
    }

    list get_merkle_tree(torrent_info const& ti)
    {
        std::vector<sha1_hash> const& mt = ti.merkle_tree();
        list ret;
        for (std::vector<sha1_hash>::const_iterator i = mt.begin()
            , end(mt.end()); i != end; ++i)
        {
            ret.append(bytes(i->to_string()));
        }
        return ret;
    }

    void set_merkle_tree(torrent_info& ti, list hashes)
    {
        std::vector<sha1_hash> h;
        for (int i = 0, e = int(len(hashes)); i < e; ++i)
            h.push_back(sha1_hash(bytes(extract<bytes>(hashes[i])).arr.data()));

        ti.set_merkle_tree(h);
    }

    bytes hash_for_piece(torrent_info const& ti, int i)
    {
        return bytes(ti.hash_for_piece(i).to_string());
    }

    bytes metadata(torrent_info const& ti)
    {
        return bytes(ti.metadata().get(), ti.metadata_size());
    }

    list map_block(torrent_info& ti, int piece, std::int64_t offset, int size)
    {
       std::vector<file_slice> p = ti.map_block(piece, offset, size);
       list result;

       for (std::vector<file_slice>::iterator i(p.begin()), e(p.end()); i != e; ++i)
          result.append(*i);

       return result;
    }

    int get_tier(announce_entry const& ae) { return ae.tier; }
    void set_tier(announce_entry& ae, int v) { ae.tier = v; }
    int get_fail_limit(announce_entry const& ae) { return ae.fail_limit; }
    void set_fail_limit(announce_entry& ae, int l) { ae.fail_limit = l; }
    int get_fails(announce_entry const& ae) { return ae.fails; }
    int get_source(announce_entry const& ae) { return ae.source; }
    bool get_verified(announce_entry const& ae) { return ae.verified; }
    bool get_updating(announce_entry const& ae) { return ae.updating; }
    bool get_start_sent(announce_entry const& ae) { return ae.start_sent; }
    bool get_complete_sent(announce_entry const& ae) { return ae.complete_sent; }

#ifndef TORRENT_NO_DEPRECATE
    bool get_send_stats(announce_entry const& ae) { return ae.send_stats; }
    std::int64_t get_size(file_entry const& fe) { return fe.size; }
    std::int64_t get_offset(file_entry const& fe) { return fe.offset; }
    std::int64_t get_file_base(file_entry const& fe) { return fe.file_base; }
    void set_file_base(file_entry& fe, int b) { fe.file_base = b; }
    bool get_pad_file(file_entry const& fe) { return fe.pad_file; }
    bool get_executable_attribute(file_entry const& fe) { return fe.executable_attribute; }
    bool get_hidden_attribute(file_entry const& fe) { return fe.hidden_attribute; }
    bool get_symlink_attribute(file_entry const& fe) { return fe.symlink_attribute; }
#endif

} // namespace unnamed

std::shared_ptr<torrent_info> buffer_constructor0(char const* buf, int len, int flags)
{
   error_code ec;
   std::shared_ptr<torrent_info> ret = std::make_shared<torrent_info>(buf
		, len, ec, flags);
#ifndef BOOST_NO_EXCEPTIONS
   if (ec) throw system_error(ec);
#endif
   return ret;
}

std::shared_ptr<torrent_info> buffer_constructor1(char const* buf, int len)
{
	return buffer_constructor0(buf, len, 0);
}

std::shared_ptr<torrent_info> file_constructor0(std::string const& filename, int flags)
{
   error_code ec;
   std::shared_ptr<torrent_info> ret = std::make_shared<torrent_info>(filename
		, ec, flags);
#ifndef BOOST_NO_EXCEPTIONS
   if (ec) throw system_error(ec);
#endif
   return ret;
}

std::shared_ptr<torrent_info> file_constructor1(std::string const& filename)
{
	return file_constructor0(filename, 0);
}

std::shared_ptr<torrent_info> bencoded_constructor0(entry const& ent, int flags)
{
	std::vector<char> buf;
	bencode(std::back_inserter(buf), ent);

	bdecode_node e;
	error_code ec;
	if (buf.size() == 0 || bdecode(&buf[0], &buf[0] + buf.size(), e, ec) != 0)
	{
#ifndef BOOST_NO_EXCEPTIONS
		throw system_error(ec);
#endif
	}

	std::shared_ptr<torrent_info> ret = std::make_shared<torrent_info>(e
			, ec, flags);
#ifndef BOOST_NO_EXCEPTIONS
	if (ec) throw system_error(ec);
#endif
	return ret;
}

std::shared_ptr<torrent_info> bencoded_constructor1(entry const& ent)
{
	return bencoded_constructor0(ent, 0);
}

void bind_torrent_info()
{
    return_value_policy<copy_const_reference> copy;

    void (torrent_info::*rename_file0)(int, std::string const&) = &torrent_info::rename_file;
#if TORRENT_USE_WSTRING && !defined TORRENT_NO_DEPRECATE
    void (torrent_info::*rename_file1)(int, std::wstring const&) = &torrent_info::rename_file;
#endif

    class_<file_slice>("file_slice")
        .def_readwrite("file_index", &file_slice::file_index)
        .def_readwrite("offset", &file_slice::offset)
        .def_readwrite("size", &file_slice::size)
        ;

    class_<torrent_info, std::shared_ptr<torrent_info>>("torrent_info", no_init)
        .def(init<sha1_hash const&, int>((arg("info_hash"), arg("flags") = 0)))
        .def("__init__", make_constructor(&bencoded_constructor0))
        .def("__init__", make_constructor(&bencoded_constructor1))
        .def("__init__", make_constructor(&buffer_constructor0))
        .def("__init__", make_constructor(&buffer_constructor1))
        .def("__init__", make_constructor(&file_constructor0))
        .def("__init__", make_constructor(&file_constructor1))
        .def(init<torrent_info const&>((arg("ti"))))

#if TORRENT_USE_WSTRING && !defined TORRENT_NO_DEPRECATE
        .def(init<std::wstring, int>((arg("file"), arg("flags") = 0)))
#endif

        .def("add_tracker", &torrent_info::add_tracker, arg("url"))
        .def("add_url_seed", &torrent_info::add_url_seed)
        .def("add_http_seed", &torrent_info::add_http_seed)
        .def("web_seeds", get_web_seeds)

        .def("name", &torrent_info::name, copy)
        .def("comment", &torrent_info::comment, copy)
        .def("creator", &torrent_info::creator, copy)
        .def("total_size", &torrent_info::total_size)
        .def("piece_length", &torrent_info::piece_length)
        .def("num_pieces", &torrent_info::num_pieces)
        .def("info_hash", &torrent_info::info_hash, copy)
        .def("hash_for_piece", &hash_for_piece)
        .def("merkle_tree", get_merkle_tree)
        .def("set_merkle_tree", set_merkle_tree)
        .def("piece_size", &torrent_info::piece_size)

        .def("num_files", &torrent_info::num_files)
        .def("rename_file", rename_file0)
        .def("remap_files", &torrent_info::remap_files)
        .def("files", &torrent_info::files, return_internal_reference<>())
        .def("orig_files", &torrent_info::orig_files, return_internal_reference<>())
#ifndef TORRENT_NO_DEPRECATE
        .def("file_at", &torrent_info::file_at)
        .def("file_at_offset", &torrent_info::file_at_offset)
#if TORRENT_USE_WSTRING
        .def("rename_file", rename_file1)
#endif // TORRENT_USE_WSTRING
#endif // TORRENT_NO_DEPRECATE

        .def("priv", &torrent_info::priv)
        .def("trackers", range(begin_trackers, end_trackers))

        .def("creation_date", &torrent_info::creation_date)

        .def("add_node", &add_node)
        .def("nodes", &nodes)
        .def("metadata", &metadata)
        .def("metadata_size", &torrent_info::metadata_size)
        .def("map_block", map_block)
        .def("map_file", &torrent_info::map_file)
        ;

#ifndef TORRENT_NO_DEPRECATE
    class_<file_entry>("file_entry")
        .def_readwrite("path", &file_entry::path)
        .def_readwrite("symlink_path", &file_entry::symlink_path)
        .def_readwrite("filehash", &file_entry::filehash)
        .def_readwrite("mtime", &file_entry::mtime)
        .add_property("pad_file", &get_pad_file)
        .add_property("executable_attribute", &get_executable_attribute)
        .add_property("hidden_attribute", &get_hidden_attribute)
        .add_property("symlink_attribute", &get_symlink_attribute)
        .add_property("offset", &get_offset)
        .add_property("size", &get_size)
        .add_property("file_base", &get_file_base, &set_file_base)
        ;
#endif

    class_<announce_entry>("announce_entry", init<std::string const&>())
        .def_readwrite("url", &announce_entry::url)
        .add_property("tier", &get_tier, &set_tier)
        .add_property("fail_limit", &get_fail_limit, &set_fail_limit)
        .add_property("fails", &get_fails)
        .add_property("source", &get_source)
        .add_property("verified", &get_verified)
        .add_property("updating", &get_updating)
        .add_property("start_sent", &get_start_sent)
        .add_property("complete_sent", &get_complete_sent)
#if !defined TORRENT_NO_DEPRECATE
        .add_property("send_stats", &get_send_stats)
#endif

        .def("reset", &announce_entry::reset)
        .def("can_announce", &announce_entry::can_announce)
        .def("is_working", &announce_entry::is_working)
        .def("trim", &announce_entry::trim)
        ;

    enum_<announce_entry::tracker_source>("tracker_source")
        .value("source_torrent", announce_entry::source_torrent)
        .value("source_client", announce_entry::source_client)
        .value("source_magnet_link", announce_entry::source_magnet_link)
        .value("source_tex", announce_entry::source_tex)
    ;

    implicitly_convertible<std::shared_ptr<torrent_info>, std::shared_ptr<const torrent_info>>();
    boost::python::register_ptr_to_python<std::shared_ptr<const torrent_info>>();
}

#ifdef _MSC_VER
#pragma warning(pop)
#endif