#pragma once
#include "adminive/collection.hpp"
#include "adminive/http.hpp"
#include "httplib.h"
#include <algorithm>
#include <charconv>
#include <concepts>
#include <cstdint>
#include <functional>
#include <memory>
#include <mutex>
#include <shared_mutex>
#include <string>
#include <string_view>
#include <type_traits>
#include <utility>
#include <vector>
namespace adminive {
template <Json_Type Json>
void write_http_json(httplib::Response& response, const Json& value) {
    response.set_content(dump_json(value, 2), "application/json; charset=utf-8");
}
template <Json_Type Json>
void write_http_response(httplib::Response& response, Http_Response<Json> value) {
    response.status = value.status;
    write_http_json(response, value.body);
}
template <Json_Type Json>
void write_http_error(httplib::Response& response, int status, const Update_Result& update) {
    write_http_response(response, make_http_error<Json>(status, update));
}
template <class T, Json_Type Json, Basic_Lock Lock = std::shared_mutex>
requires Writable_Adapted_Object<T> && std::copy_constructible<Object_Model_Type<T>>
class Http_Resource {
public:
    using Service = Resource_Service<T, Json, Lock>;
    using Transaction = typename Service::Transaction;
    Http_Resource(T& value, std::string path, Transaction transaction = {}, Lock* shared_lock = nullptr) : service_(std::make_shared<Service>(value, std::move(path), std::move(transaction), shared_lock)) {}
    template <structive::Synchronization_Policy Policy>
    explicit Http_Resource(Managed_Value<std::remove_cvref_t<T>, Policy>& value, std::string path, Transaction transaction = {}) : service_(std::make_shared<Service>(value, std::move(path), std::move(transaction))) {}
    template <class Managed, std::size_t Root_Index, auto... Members>
    requires (!std::is_const_v<Managed>) && std::same_as<typename Managed_Field<Managed, Root_Index, Members...>::value_type, std::remove_cvref_t<T>>
    explicit Http_Resource(Managed_Field<Managed, Root_Index, Members...> value, std::string path, Transaction transaction = {}) : service_(std::make_shared<Service>(value, std::move(path), std::move(transaction))) {}
    Json amis_schema() const {
        return service_->amis_schema();
    }
    void bind(httplib::Server& server) const {
        const auto service = service_;
        server.Get(service->path() + "/descriptor", [service](const httplib::Request&, httplib::Response& response) {
            write_http_response(response, service->descriptor_response());
        });
        server.Get(service->path() + "/data", [service](const httplib::Request&, httplib::Response& response) {
            write_http_response(response, service->data_response());
        });
        server.Get(service->path() + "/amis", [service](const httplib::Request&, httplib::Response& response) {
            write_http_response(response, service->amis_response());
        });
        server.Post(service->path() + "/data", [service](const httplib::Request& request, httplib::Response& response) {
            write_http_response(response, service->update_response(request.body));
        });
    }
private:
    std::shared_ptr<Service> service_;
};
template <Described_Type T, Json_Type Json, Basic_Lock Lock = std::mutex>
requires std::default_initializable<T> && std::copy_constructible<T> && std::assignable_from<T&, T>
class Http_Collection_Resource {
public:
    using Service = Collection_Service<T, Json, Lock>;
    explicit Http_Collection_Resource(std::string path, std::vector<T> initial = {}) : service_(std::make_shared<Service>(std::move(path), std::move(initial))) {}
    template <Described_Type Status>
    void register_overview_status(std::string api, std::uint64_t interval = 2000) {
        service_->template register_overview_status<Status>(std::move(api), interval);
    }
    template <auto Function>
    void register_status(std::uint64_t interval = 2000) {
        service_->template register_status<Function>(interval);
    }
    std::size_t size() const {
        return service_->size();
    }
    Json items_json() const {
        return service_->items_json();
    }
    Json amis_schema() const {
        return service_->amis_schema();
    }
    void bind(httplib::Server& server) const {
        const auto service = service_;
        server.Get(service->path() + "/descriptor", [service](const httplib::Request&, httplib::Response& response) {
            write_http_response(response, service->descriptor_response());
        });
        server.Get(service->path() + "/amis", [service](const httplib::Request&, httplib::Response& response) {
            write_http_response(response, service->amis_response());
        });
        if(service->has_status()) {
            server.Get(service->path() + "/status/descriptor", [service](const httplib::Request&, httplib::Response& response) {
                write_http_response(response, service->status_descriptor_response());
            });
            server.Get(status_pattern(service->path()), [service](const httplib::Request& request, httplib::Response& response) {
                write_http_response(response, service->status_response(read_route_id(request)));
            });
        }
        server.Get(service->path(), [service](const httplib::Request& request, httplib::Response& response) {
            Collection_Query query;
            query.page = read_size_parameter(request, "page", 1);
            query.per_page = read_size_parameter(request, "perPage", 20);
            if(request.has_param("orderBy")) {
                query.order_by = request.get_param_value("orderBy");
                query.order_dir = request.has_param("orderDir") ? request.get_param_value("orderDir") : "asc";
            }
            write_http_response(response, service->list_response(std::move(query)));
        });
        server.Get(item_pattern(service->path()), [service](const httplib::Request& request, httplib::Response& response) {
            write_http_response(response, service->item_response(read_route_id(request)));
        });
        server.Post(service->path(), [service](const httplib::Request& request, httplib::Response& response) {
            write_http_response(response, service->create_response(request.body));
        });
        if(service->user_reorderable()) {
            server.Post(service->path() + "/order", [service](const httplib::Request& request, httplib::Response& response) {
                write_http_response(response, service->reorder_response(request.body));
            });
        }
        server.Put(item_pattern(service->path()), [service](const httplib::Request& request, httplib::Response& response) {
            write_http_response(response, service->update_response(read_route_id(request), request.body));
        });
        server.Patch(item_pattern(service->path()), [service](const httplib::Request& request, httplib::Response& response) {
            write_http_response(response, service->update_response(read_route_id(request), request.body));
        });
        server.Delete(item_pattern(service->path()), [service](const httplib::Request& request, httplib::Response& response) {
            write_http_response(response, service->delete_response(read_route_id(request)));
        });
    }
private:
    static std::size_t read_size_parameter(const httplib::Request& request, const char* name, std::size_t fallback) {
        if(!request.has_param(name)) {
            return fallback;
        }
        const auto text = request.get_param_value(name);
        std::size_t value{};
        const auto [end, error] = std::from_chars(text.data(), text.data() + text.size(), value);
        if(error != std::errc{} || end != text.data() + text.size() || value == 0) {
            return fallback;
        }
        return value;
    }
    static std::uint64_t read_route_id(const httplib::Request& request) {
        const std::string text = request.matches[1].str();
        std::uint64_t id{};
        const auto [end, error] = std::from_chars(text.data(), text.data() + text.size(), id);
        if(error != std::errc{} || end != text.data() + text.size()) {
            return 0;
        }
        return id;
    }
    static std::string item_pattern(const std::string& path) {
        return path + R"(/(\d+))";
    }
    static std::string status_pattern(const std::string& path) {
        return path + R"(/(\d+)/status)";
    }
    std::shared_ptr<Service> service_;
};
}