#pragma once

#include "rublon/memory.hpp"
#include <rublon/bits.hpp>

#include <rublon/authentication_step_interface.hpp>
#include <rublon/configuration.hpp>
#include <rublon/json.hpp>
#include <rublon/method/method_select.hpp>

#include <rublon/session.hpp>

#include <sys/utsname.h>

[[deprecated]] extern std::string g_tid;

namespace rublon {

template < class MethodSelect_t = MethodSelect >
class Init : public AuthenticationStep {
    using base_t = AuthenticationStep;

    const char * apiPath = "/api/transaction/init";

    tl::expected< MethodSelect_t, Error > createMethod(const Document & coreResponse) const {
        memory::MonotonicStackResource< 256 > stackResource;
        RapidJSONPMRAlloc alloc{&stackResource};

        const auto & rublonResponse = coreResponse["result"];

        // const auto * rublonMethods = JSONPointer{"/result/methods", &alloc}.Get(coreResponse);
        const auto * rublonTid = JSONPointer{"/result/tid", &alloc}.Get(coreResponse);
        _session.updateTransactionId(rublonTid);

        return MethodSelect_t{_session, rublonResponse["methods"], _session.config().prompt, _session.config().autopushPrompt};
    }

    void addPamInfo(Document & coreRequest, const Pam_t & pam) const {
        auto & alloc = coreRequest.GetAllocator();
        coreRequest.AddMember("username", Value{pam.username().get(), alloc}, alloc);
    }

    void addParams(Document & coreRequest, const Pam_t & pam) const {
        memory::MonotonicStackResource< 512 > stackResource;
        std::pmr::string releaseInfo{&stackResource};
        auto & alloc = coreRequest.GetAllocator();

        const auto os = details::osName(&stackResource);

        if(os == "unknown") {
            log(LogLevel::Warning, "No OS information available");
        }

        Value osNamePretty{os.data(), static_cast< unsigned >(os.size()), alloc};
        Value ip{pam.ip().get(), alloc};

        Value params{rapidjson::kObjectType};
        params.AddMember("userIP", ip, alloc);
        params.AddMember("appVer", RUBLON_VERSION_STRING, alloc);
        params.AddMember("os", osNamePretty, alloc);

        coreRequest.AddMember("params", std::move(params), alloc);
    }

    tl::expected< std::reference_wrapper< const Document >, Error > checkEnrolement(const Document & coreResponse, const Pam_t pam) const {
        using namespace std::string_view_literals;
        const auto & resp = coreResponse;

        /// TODO refactor this
        if(resp.HasMember("result") and resp["result"].IsObject() and resp["result"].HasMember("status")) {
            const auto & status = resp["result"]["status"].GetString();
            log(LogLevel::Warning, "Got enrolement message with stats %s", status);
            if(status == "pending"sv) {
                if(resp["result"].HasMember("webURI")) {
                    const auto & weburi = resp["result"]["webURI"].GetString();
                    pam.print("Visit %s", weburi);
                }
            } else if(status == "waiting"sv) {
                return tl::unexpected{Error{RublonAuthenticationInterrupt{RublonAuthenticationInterrupt::UserWaiting}}};
            } else if(status == "denied"sv) {
                return tl::unexpected{Error{RublonAuthenticationInterrupt{RublonAuthenticationInterrupt::UserDenied}}};
            }
        }

        return coreResponse;
    }

  public:
    const char * _name = "Initialization";

    Init(Session & session) : base_t(session) {
        log(LogLevel::Debug, "Init");
    }

    template < typename Hander_t >
    tl::expected< MethodSelect_t, Error > handle(const CoreHandlerInterface< Hander_t > & coreHandler, const Pam_t & pam) const {
        const auto createMethod    = [&](const auto & coreResponse) { return this->createMethod(coreResponse); };
        const auto checkEnrolement = [&](const auto & coreResponse) { return this->checkEnrolement(coreResponse, pam); };

        RapidJSONPMRStackAlloc< 2048 > alloc{};
        Document body{rapidjson::kObjectType, &alloc};

        this->addSystemToken(body);
        this->addPamInfo(body, pam);
        this->addParams(body, pam);

        return coreHandler
          .request(alloc, apiPath, body) //
          .and_then(checkEnrolement)
          .and_then(createMethod);
    }
};
} // namespace rublon