//SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
//SPDX-License-Identifier: GPL-3.0-or-later

#pragma once

#include <memory.h>

#include <QObject>
#include <QQmlEngine>
#include <QTimer>

#include "currencies.h"
#include "assets.h"

class API;
namespace Models {

class Magpie : public QObject {
    Q_OBJECT
    QML_ELEMENT
    QML_SINGLETON

public:
    enum State {
        Offline,
        NoServer,
        NotAuthenticated,
        Authenticating,
        Authenticated
    };
    Q_ENUM(State)

    Q_PROPERTY(QUrl address READ getAddress NOTIFY addressChanged)
    Q_PROPERTY(State state READ getState NOTIFY stateChanged)
    Q_PROPERTY(Assets* assets READ getAssets CONSTANT)
    Q_PROPERTY(Currencies* currencies READ getCurrencies CONSTANT)

    explicit Magpie(QObject *parent = nullptr);

    QUrl getAddress() const;
    State getState() const;
    QString getAccessToken() const;
    QString getRenewToken() const;

    void installAPI(const std::shared_ptr<API>& api);
    void setAddress(const QUrl& address);
    void forceAddress(const QUrl& address);
    void setTokens(const QString access, const QString& renew, bool notify = false);
    void setState(State newState);
    Assets* getAssets();
    Currencies* getCurrencies();

signals:
    void addressChanged(const QUrl& path);
    void stateChanged(State state);

    void storeTokens(const QString& access, const QString& renew);
    void displayError(const QString& err);

public:
    Currencies currencies;
    Assets assets;

private slots:
    void requestAssets();
    void onPositivePoll();

private:
    void startPolling();
    void sendPoll(bool clear = false);
    void onPollSuccess(const QVariantMap& data);
    void onPollError(const QString& err, const std::optional<QVariantMap>& data);
    bool handleChanges(const QVariantMap& changes);
    bool handleAssetChanges(const QVariantMap& changes);
    bool handleCurrenciesChanges(const QVariantMap& changes);
    void resetAllModels();
    void requestCurrencies();

private:
    QUrl address;
    State state;
    QString accessToken;
    QString renewToken;
    std::shared_ptr<API> api;
    QTimer firstPoll;
    unsigned int pollRequestId;
    bool requestingCurrencies;
};

}