#include "OlympicsAPI.h"
#include <string>
#include <stdexcept>

// networking
#include <QEventLoop>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QUrl>
#include <QUrlQuery>

// json parsing
#include <QFile>
#include <QJsonValue>
#include <QJsonDocument>
#include <QJsonObject>
#include <QVariantMap>
#include <QJsonArray>


using namespace std;

/**
 * @brief OlympicsAPI::getSportData Requests the current data from the Olympics API of a certain discipline.
 * @param sport The discipline to request.
 * @return The current information provided by the API endpoint.
 */
QJsonObject OlympicsAPI::getSportData(OlympicsAPI::Disciplines sport) {
    string shortName = this->getDisciplineShort(sport);

    if (USE_API_REQUEST) {
        // create custom temporary event loop on stack
        QEventLoop eventLoop;

        // "quit()" the event-loop, when the network request "finished()"
        QNetworkAccessManager mgr;
        QObject::connect(&mgr, SIGNAL(finished(QNetworkReply*)), &eventLoop, SLOT(quit()));

        QString endpoint = (API_LINK + shortName).c_str();

        // the HTTP request
        QNetworkRequest req( (QUrl( endpoint )) );
        QNetworkReply *reply = mgr.get(req);
        eventLoop.exec(); // blocks stack until "finished()" has been called

        if (reply->error() == QNetworkReply::NoError) {
            //success

            QString strReply = (QString)reply->readAll();

            //parse json
            QJsonDocument jsonResponse = QJsonDocument::fromJson(strReply.toUtf8());

            QJsonObject jsonObj = jsonResponse.object();

            delete reply;

            return jsonObj;
        }
        else {
            //failure
            delete reply;

            throw invalid_argument("API request failed.");
        }
    }

    // if API is not used, open locally stored data
    QString filePath = ("../../res/mock/" + shortName + ".json").c_str();
    QFile file( filePath );

    if(!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
        throw invalid_argument("Could not open file to read data of the given discipline.");
    } else {
        QString text = file.readAll();
        file.close();
        return (QJsonDocument::fromJson(text.toUtf8())).object();
    }
}

/**
 * @brief OlympicsAPI::getDisciplineShort Get the discipline's short name defined by the IOC (International Olympic Committee)
 * @param sport The sport you want to get the name from.
 * @return The short name as a string.
 */
string OlympicsAPI::getDisciplineShort(OlympicsAPI::Disciplines sport) {
    switch (sport) {
    case OlympicsAPI::Disciplines::AquaticsArtisticSwimming: return "SWA";
    case OlympicsAPI::Disciplines::AquaticsDiving: return "DIV";
    case OlympicsAPI::Disciplines::AquaticsMarathonSwimming: return "OWS";
    case OlympicsAPI::Disciplines::AquaticsSwimming: return "SWM";
    case OlympicsAPI::Disciplines::AquaticsWaterPolo: return "WPO";
    case OlympicsAPI::Disciplines::Archery: return "ARC";
    case OlympicsAPI::Disciplines::Athletics: return "ATH";
    case OlympicsAPI::Disciplines::Badminton: return "BDM";
    case OlympicsAPI::Disciplines::Basketball3v3: return "BK3";
    case OlympicsAPI::Disciplines::Basketball: return "BKB";
    case OlympicsAPI::Disciplines::Boxing: return "BOX";
    case OlympicsAPI::Disciplines::Breaking: return "BKG";
    case OlympicsAPI::Disciplines::CanoeingSprint: return "CSP";
    case OlympicsAPI::Disciplines::CanoeingSlalom: return "CSL";
    case OlympicsAPI::Disciplines::CyclingBMXFreestyle: return "BMF";
    case OlympicsAPI::Disciplines::CyclingBMXRacing: return "BMX";
    case OlympicsAPI::Disciplines::CyclingMaountainBike: return "MTB";
    case OlympicsAPI::Disciplines::CyclingRoad: return "CRD";
    case OlympicsAPI::Disciplines::CyclingTrack: return "CTR";
    case OlympicsAPI::Disciplines::EquestrianDressage: return "EDR";
    case OlympicsAPI::Disciplines::EquestrianEventing: return "EVE";
    case OlympicsAPI::Disciplines::EquestrianJumping: return "EJP";
    case OlympicsAPI::Disciplines::Fencing: return "FEN";
    case OlympicsAPI::Disciplines::FieldHockey: return "HOC";
    case OlympicsAPI::Disciplines::Football: return "FBL";
    case OlympicsAPI::Disciplines::Golf: return "GLF";
    case OlympicsAPI::Disciplines::GymnasticsArtistic: return "GAR";
    case OlympicsAPI::Disciplines::GymnasticsRhythmic: return "GRY";
    case OlympicsAPI::Disciplines::GymnasticsTrampoline: return "GTR";
    case OlympicsAPI::Disciplines::HandballIndoor: return "HBL";
    case OlympicsAPI::Disciplines::Judo: return "JUD";
    case OlympicsAPI::Disciplines::ModernPentathlon: return "MPN";
    case OlympicsAPI::Disciplines::Rowing: return "ROW";
    case OlympicsAPI::Disciplines::Rugby7: return "RU7";
    case OlympicsAPI::Disciplines::Sailing: return "SAL"; break;
    case OlympicsAPI::Disciplines::Shooting: return "SHO"; break;
    case OlympicsAPI::Disciplines::Skateboarding: return "SKB"; break;
    case OlympicsAPI::Disciplines::SportClimbing: return "CLB"; break;
    case OlympicsAPI::Disciplines::Surfing: return "SRF"; break;
    case OlympicsAPI::Disciplines::TableTennis: return "TTE"; break;
    case OlympicsAPI::Disciplines::Taekwondo: return "TKW"; break;
    case OlympicsAPI::Disciplines::Tennis: return "TEN"; break;
    case OlympicsAPI::Disciplines::Triathlon: return "TRI"; break;
    case OlympicsAPI::Disciplines::VolleyballBeach: return "VBV"; break;
    case OlympicsAPI::Disciplines::VolleyballIndoor: return "VVO"; break;
    case OlympicsAPI::Disciplines::Weightlifting: return "WLF"; break;
    case OlympicsAPI::Disciplines::WrestlingFreestyle: return "WRE"; break;
    case OlympicsAPI::Disciplines::WrestlingGrecoRoman: return "WRG"; break;
    default: return "ARC"; // default, which should not be possible, because of enum
    }
}