#include "protocol.hpp"
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#include "book.hpp"
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#include "cpp-httplib/httplib.h"
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#include "easywsclient/easywsclient.hpp"
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#include "json.hpp"
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#include "secrets.hpp"
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#include <chrono>
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#include <cstddef>
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#include <iostream>
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#include <memory>
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#include <queue>
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#include <sstream>
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#include <stdexcept>
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#include <string>
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#include <unordered_map>
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namespace protocol
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{
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static std::unordered_map<json::MessageTypes, book::ProductTypeEnum>
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mapAnnounce;
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std::string server = std::string(HOST) + ":" + std::string(PORT);
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httplib::Client cli("http://" + server);
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double lastime = 0;
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void initialise()
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{
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mapAnnounce = {{json::FUTURE_TYPE, book::FUTURE},
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{json::SPREAD_TYPE, book::SPREAD},
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{json::CALL_TYPE, book::CALL},
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{json::PUT_TYPE, book::PUT}};
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}
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std::unordered_map<std::string, book::Book> recoverBook()
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{
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std::unordered_map<std::string, book::Book> bs;
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// std::ifstream sampleFile("../data.test");
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// std::stringstream ss;
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// ss << sampleFile.rdbuf();
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httplib::Client cli("http://" + server);
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auto res = cli.Get("/recover");
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std::string l;
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// l = ss.str();
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l = res->body;
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std::queue<json::Message*> a(json::parse(l));
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while (!a.empty()) {
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if (static_cast<json::FromExchange*>(a.front()) != nullptr ||
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static_cast<json::FromExchange*>(a.front())->timestamp > lastime) {
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lastime = static_cast<json::FromExchange*>(a.front())->timestamp;
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protocol::handleMessage(bs, a.front());
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}
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delete a.front();
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a.pop();
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}
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return bs;
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}
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void catchUp(std::unordered_map<std::string, book::Book>& bs)
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{
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static std::unique_ptr<easywsclient::WebSocket> ws(
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easywsclient::WebSocket::from_url("ws://" + server + "/information"));
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std::string feed;
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bool gotMessage = false;
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ws->poll();
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ws->dispatch([gotMessageOut = &gotMessage, messageOut = &feed,
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ws = ws.get()](const std::string& message) {
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*gotMessageOut = true;
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*messageOut = message;
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});
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if (gotMessage) {
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std::queue<json::Message*> a(json::parse(feed));
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while (!a.empty()) {
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if (static_cast<json::FromExchange*>(a.front()) != nullptr ||
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static_cast<json::FromExchange*>(a.front())->timestamp >
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lastime) {
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lastime =
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static_cast<json::FromExchange*>(a.front())->timestamp;
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}
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protocol::handleMessage(bs, a.front());
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delete a.front();
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a.pop();
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}
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}
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}
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json::Message* addOrder(json::AddMessage& order)
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{
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std::string message = order.as_string();
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return send(message);
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}
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json::Message* deleteOrder(json::DeleteMessage& order)
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{
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std::string message = order.as_string();
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return send(message);
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}
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void handleMessage(std::unordered_map<std::string, book::Book>& bs,
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json::Message* message)
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{
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if (mapAnnounce.empty()) initialise();
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if (dynamic_cast<json::FromExchange*>(message) != nullptr) {
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lastime = dynamic_cast<json::FromExchange*>(message)->timestamp;
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}
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switch (message->type) {
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case json::FUTURE_TYPE:
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case json::SPREAD_TYPE:
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case json::CALL_TYPE:
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case json::PUT_TYPE:
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announce(bs, static_cast<json::AnnounceMessage*>(message));
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break;
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case json::SETTLEMENT:
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settle(bs, static_cast<json::SettleMessage*>(message));
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break;
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case json::ADDED:
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addedOrder(bs, static_cast<json::AddedMessage*>(message));
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break;
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case json::DELETED:
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deletedOrder(bs, static_cast<json::DeletedMessage*>(message));
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break;
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case json::TRADE:
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tradeOrder(bs, static_cast<json::TradeMessage*>(message));
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break;
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case json::BROKER_REQUEST:
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case json::BROKER_ACK:
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case json::BROKER_CONFIRM:
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broker(bs, static_cast<json::Broker*>(message));
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break;
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default:;
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}
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}
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void announce(std::unordered_map<std::string, book::Book>& bs,
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json::AnnounceMessage* message)
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{
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bs[message->product] =
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book::Book(mapAnnounce[message->type], message->product,
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message->stationId, message->unit, message->expiry,
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message->aggFee, message->pasFee, message->broFee);
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}
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void settle(std::unordered_map<std::string, book::Book>& bs,
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json::SettleMessage* message)
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{
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bs.erase(message->product);
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}
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void addedOrder(std::unordered_map<std::string, book::Book>& bs,
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json::AddedMessage* message)
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{
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if (message->side == book::Buy && message->resting) {
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book::Order t(message->price, book::Buy, message->resting,
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message->timestamp, message->id);
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bs[message->product].bid(t);
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} else if (message->side == book::Sell && message->resting) {
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book::Order t(message->price, book::Sell, message->resting,
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message->timestamp, message->id);
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bs[message->product].ask(t);
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}
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}
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void deletedOrder(std::unordered_map<std::string, book::Book>& bs,
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json::DeletedMessage* message)
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{
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if (message->side == book::Buy) {
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bs[message->product].bidSide.erase(message->id);
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} else {
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bs[message->product].askSide.erase(message->id);
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}
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}
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void tradeOrder(std::unordered_map<std::string, book::Book>& bs,
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json::TradeMessage* message)
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{
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if (bs.find(message->passiveOrder) != bs.end()) {
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if (message->tradeType == json::BUY_AGGRESSOR) {
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if (message->passiveOrderRemaining > 0) {
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bs[message->product].askSide.at(message->passiveOrder).volume =
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message->passiveOrderRemaining;
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} else {
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bs[message->product].askSide.erase(message->passiveOrder);
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}
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} else if (message->tradeType == json::SELL_AGGRESSOR) {
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if (message->passiveOrderRemaining > 0) {
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bs[message->product].bidSide.at(message->passiveOrder).volume =
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message->passiveOrderRemaining;
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} else {
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bs[message->product].bidSide.erase(message->passiveOrder);
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}
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}
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}
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}
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void broker(std::unordered_map<std::string, book::Book>& bs,
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json::Broker* message)
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{
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}
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json::Message* send(std::string& message)
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{
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httplib::MultipartFormDataItems a = {{"message", message, "", ""},
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{"username", USER, "", ""},
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{"password", PASS, "", ""}};
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auto res = cli.Post("/execution", a);
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std::string b = res->body;
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std::queue<json::Message*> c = json::parse(b);
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return c.front();
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}
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} // namespace protocol
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