//
// MessagePack for C++ static resolution routine
//
// Copyright (C) 2008-2015 FURUHASHI Sadayuki
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//
#ifndef MSGPACK_TYPE_MAP_HPP
#define MSGPACK_TYPE_MAP_HPP

#include "rpc/msgpack/versioning.hpp"
#include "rpc/msgpack/object_fwd.hpp"
#include "rpc/msgpack/adaptor/check_container_size.hpp"

#include <map>
#include <vector>
#include <algorithm>

namespace clmdep_msgpack {

/// @cond
MSGPACK_API_VERSION_NAMESPACE(v1) {
/// @endcond

namespace type {

template <typename K, typename V, typename Compare = std::less<K>, typename Alloc = std::allocator<std::pair<K, V> > >
class assoc_vector : public std::vector< std::pair<K, V>, Alloc > {
    using std::vector<std::pair<K, V>, Alloc>::vector;
};

namespace detail {
    template <typename K, typename V, typename Compare, typename Alloc>
    struct pair_first_less {
        bool operator() (const std::pair<K, V>& x, const std::pair<K, V>& y) const
            { return Compare()(x.first, y.first); }
    };
}

}  //namespace type

namespace adaptor {

template <typename K, typename V, typename Compare, typename Alloc>
struct as<
    type::assoc_vector<K, V, Compare, Alloc>,
    typename std::enable_if<clmdep_msgpack::has_as<K>::value && clmdep_msgpack::has_as<V>::value>::type> {
    type::assoc_vector<K, V, Compare, Alloc> operator()(clmdep_msgpack::object const& o) const {
        if (o.type != clmdep_msgpack::type::MAP) { throw clmdep_msgpack::type_error(); }
        type::assoc_vector<K, V, Compare, Alloc> v;
        v.reserve(o.via.map.size);
        clmdep_msgpack::object_kv* p = o.via.map.ptr;
        clmdep_msgpack::object_kv* const pend = o.via.map.ptr + o.via.map.size;
        for (; p < pend; ++p) {
            v.emplace_back(p->key.as<K>(), p->val.as<V>());
        }
        std::sort(v.begin(), v.end(), type::detail::pair_first_less<K, V, Compare, Alloc>());
        return v;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct convert<type::assoc_vector<K, V, Compare, Alloc> > {
    clmdep_msgpack::object const& operator()(clmdep_msgpack::object const& o, type::assoc_vector<K, V, Compare, Alloc>& v) const {
        if (o.type != clmdep_msgpack::type::MAP) { throw clmdep_msgpack::type_error(); }
        v.resize(o.via.map.size);
        clmdep_msgpack::object_kv* p = o.via.map.ptr;
        clmdep_msgpack::object_kv* const pend = o.via.map.ptr + o.via.map.size;
        std::pair<K, V>* it(&v.front());
        for (; p < pend; ++p, ++it) {
            p->key.convert(it->first);
            p->val.convert(it->second);
        }
        std::sort(v.begin(), v.end(), type::detail::pair_first_less<K, V, Compare, Alloc>());
        return o;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct pack<type::assoc_vector<K, V, Compare, Alloc> > {
    template <typename Stream>
    clmdep_msgpack::packer<Stream>& operator()(clmdep_msgpack::packer<Stream>& o, const type::assoc_vector<K, V, Compare, Alloc>& v) const {
        uint32_t size = checked_get_container_size(v.size());
        o.pack_map(size);
        for (typename type::assoc_vector<K, V, Compare, Alloc>::const_iterator it(v.begin()), it_end(v.end());
            it != it_end; ++it) {
            o.pack(it->first);
            o.pack(it->second);
        }
        return o;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct object_with_zone<type::assoc_vector<K, V, Compare, Alloc> > {
    void operator()(clmdep_msgpack::object::with_zone& o, const type::assoc_vector<K, V, Compare, Alloc>& v) const {
        o.type = clmdep_msgpack::type::MAP;
        if (v.empty()) {
            o.via.map.ptr  = nullptr;
            o.via.map.size = 0;
        }
        else {
            uint32_t size = checked_get_container_size(v.size());
            clmdep_msgpack::object_kv* p = static_cast<clmdep_msgpack::object_kv*>(o.zone.allocate_align(sizeof(clmdep_msgpack::object_kv)*size));
            clmdep_msgpack::object_kv* const pend = p + size;
            o.via.map.ptr  = p;
            o.via.map.size = size;
            typename type::assoc_vector<K, V, Compare, Alloc>::const_iterator it(v.begin());
            do {
                p->key = clmdep_msgpack::object(it->first, o.zone);
                p->val = clmdep_msgpack::object(it->second, o.zone);
                ++p;
                ++it;
            } while(p < pend);
        }
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct as<
    std::map<K, V, Compare, Alloc>,
    typename std::enable_if<clmdep_msgpack::has_as<K>::value && clmdep_msgpack::has_as<V>::value>::type> {
    std::map<K, V, Compare, Alloc> operator()(clmdep_msgpack::object const& o) const {
        if (o.type != clmdep_msgpack::type::MAP) { throw clmdep_msgpack::type_error(); }
        clmdep_msgpack::object_kv* p(o.via.map.ptr);
        clmdep_msgpack::object_kv* const pend(o.via.map.ptr + o.via.map.size);
        std::map<K, V, Compare, Alloc> v;
        for (; p != pend; ++p) {
            v.emplace(p->key.as<K>(), p->val.as<V>());
        }
        return v;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct convert<std::map<K, V, Compare, Alloc> > {
    clmdep_msgpack::object const& operator()(clmdep_msgpack::object const& o, std::map<K, V, Compare, Alloc>& v) const {
        if (o.type != clmdep_msgpack::type::MAP) { throw clmdep_msgpack::type_error(); }
        clmdep_msgpack::object_kv* p(o.via.map.ptr);
        clmdep_msgpack::object_kv* const pend(o.via.map.ptr + o.via.map.size);
        std::map<K, V, Compare, Alloc> tmp;
        for (; p != pend; ++p) {
            K key;
            p->key.convert(key);
            p->val.convert(tmp[std::move(key)]);
        }
        v = std::move(tmp);
        return o;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct pack<std::map<K, V, Compare, Alloc> > {
    template <typename Stream>
    clmdep_msgpack::packer<Stream>& operator()(clmdep_msgpack::packer<Stream>& o, const std::map<K, V, Compare, Alloc>& v) const {
        uint32_t size = checked_get_container_size(v.size());
        o.pack_map(size);
        for (typename std::map<K, V, Compare, Alloc>::const_iterator it(v.begin()), it_end(v.end());
            it != it_end; ++it) {
            o.pack(it->first);
            o.pack(it->second);
        }
        return o;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct object_with_zone<std::map<K, V, Compare, Alloc> > {
    void operator()(clmdep_msgpack::object::with_zone& o, const std::map<K, V, Compare, Alloc>& v) const {
        o.type = clmdep_msgpack::type::MAP;
        if (v.empty()) {
            o.via.map.ptr  = nullptr;
            o.via.map.size = 0;
        }
        else {
            uint32_t size = checked_get_container_size(v.size());
            clmdep_msgpack::object_kv* p = static_cast<clmdep_msgpack::object_kv*>(o.zone.allocate_align(sizeof(clmdep_msgpack::object_kv)*size));
            clmdep_msgpack::object_kv* const pend = p + size;
            o.via.map.ptr  = p;
            o.via.map.size = size;
            typename std::map<K, V, Compare, Alloc>::const_iterator it(v.begin());
            do {
                p->key = clmdep_msgpack::object(it->first, o.zone);
                p->val = clmdep_msgpack::object(it->second, o.zone);
                ++p;
                ++it;
            } while(p < pend);
        }
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct as<
    std::multimap<K, V, Compare, Alloc>,
    typename std::enable_if<clmdep_msgpack::has_as<K>::value && clmdep_msgpack::has_as<V>::value>::type> {
    std::multimap<K, V, Compare, Alloc> operator()(clmdep_msgpack::object const& o) const {
        if (o.type != clmdep_msgpack::type::MAP) { throw clmdep_msgpack::type_error(); }
        clmdep_msgpack::object_kv* p(o.via.map.ptr);
        clmdep_msgpack::object_kv* const pend(o.via.map.ptr + o.via.map.size);
        std::multimap<K, V, Compare, Alloc> v;
        for (; p != pend; ++p) {
            v.emplace(p->key.as<K>(), p->val.as<V>());
        }
        return v;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct convert<std::multimap<K, V, Compare, Alloc> > {
    clmdep_msgpack::object const& operator()(clmdep_msgpack::object const& o, std::multimap<K, V, Compare, Alloc>& v) const {
        if (o.type != clmdep_msgpack::type::MAP) { throw clmdep_msgpack::type_error(); }
        clmdep_msgpack::object_kv* p(o.via.map.ptr);
        clmdep_msgpack::object_kv* const pend(o.via.map.ptr + o.via.map.size);
        std::multimap<K, V, Compare, Alloc> tmp;
        for (; p != pend; ++p) {
            std::pair<K, V> value;
            p->key.convert(value.first);
            p->val.convert(value.second);
            tmp.insert(std::move(value));
        }
        v = std::move(tmp);
        return o;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct pack<std::multimap<K, V, Compare, Alloc> > {
    template <typename Stream>
    clmdep_msgpack::packer<Stream>& operator()(clmdep_msgpack::packer<Stream>& o, const std::multimap<K, V, Compare, Alloc>& v) const {
        uint32_t size = checked_get_container_size(v.size());
        o.pack_map(size);
        for (typename std::multimap<K, V, Compare, Alloc>::const_iterator it(v.begin()), it_end(v.end());
            it != it_end; ++it) {
            o.pack(it->first);
            o.pack(it->second);
        }
        return o;
    }
};

template <typename K, typename V, typename Compare, typename Alloc>
struct object_with_zone<std::multimap<K, V, Compare, Alloc> > {
    void operator()(clmdep_msgpack::object::with_zone& o, const std::multimap<K, V, Compare, Alloc>& v) const {
        o.type = clmdep_msgpack::type::MAP;
        if (v.empty()) {
            o.via.map.ptr  = nullptr;
            o.via.map.size = 0;
        }
        else {
            uint32_t size = checked_get_container_size(v.size());
            clmdep_msgpack::object_kv* p = static_cast<clmdep_msgpack::object_kv*>(o.zone.allocate_align(sizeof(clmdep_msgpack::object_kv)*size));
            clmdep_msgpack::object_kv* const pend = p + size;
            o.via.map.ptr  = p;
            o.via.map.size = size;
            typename std::multimap<K, V, Compare, Alloc>::const_iterator it(v.begin());
            do {
                p->key = clmdep_msgpack::object(it->first, o.zone);
                p->val = clmdep_msgpack::object(it->second, o.zone);
                ++p;
                ++it;
            } while(p < pend);
        }
    }
};

} // namespace adaptor

/// @cond
}  // MSGPACK_API_VERSION_NAMESPACE(v1)
/// @endcond

}  // namespace clmdep_msgpack

#endif // MSGPACK_TYPE_MAP_HPP
