/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2017 - ROLI Ltd.

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#pragma once

struct LicenseThread;
class LicenseWebview;

//==============================================================================
struct LicenseState
{
    enum class Type
    {
        notLoggedIn,  // only used when the webview is open and the user has not logged in yet
        noLicenseChosenYet,

        GPL,          // GPL is used when the user enables the GPL compile flag
        personal,
        edu,
        indie,
        pro
    };

    enum class ApplicationUsageData
    {
        notChosenYet,

        enabled,
        disabled
    };

    Type type = Type::notLoggedIn;
    ApplicationUsageData applicationUsageDataState = ApplicationUsageData::notChosenYet;
    String username;
    String email;
    String authToken;

    static const char* licenseTypeToString (Type licenseType);

    bool isPaidOrGPL() const noexcept     { return (type == Type::GPL || type == Type::indie || type == Type::pro); }

    Image avatar;
};

//==============================================================================
class LicenseController
{
public:
    //==============================================================================
    struct StateChangedCallback
    {
        virtual ~StateChangedCallback() {}
        virtual void licenseStateChanged (const LicenseState&) = 0;
    };

    //==============================================================================
    LicenseController();
    ~LicenseController();

    void startWebviewIfNeeded();

    //==============================================================================
    LicenseState getState() const noexcept;
    void logout();
    void chooseNewLicense();
    void setApplicationUsageDataState (LicenseState::ApplicationUsageData newState);

    //==============================================================================
    void addLicenseStatusChangedCallback    (StateChangedCallback* callback) { listeners.add    (callback); }
    void removeLicenseStatusChangedCallback (StateChangedCallback* callback) { listeners.remove (callback); }

private:
    //==============================================================================
    void updateState (const LicenseState&);

    static LicenseState licenseStateFromOldSettings (XmlElement*);
    static LicenseState licenseStateFromSettings (PropertiesFile&);
    static void licenseStateToSettings (const LicenseState&, PropertiesFile&);

   #if ! JUCER_ENABLE_GPL_MODE
    //==============================================================================
    struct ModalCompletionCallback;
    friend struct LicenseThread;

    //==============================================================================
    void closeWebview (int);
    void modalStateFinished (int);
    void ensureLicenseWebviewIsOpenWithPage (const String&);
    void queryWebview (const String&, const String&, HashMap<String, String>&);

    //==============================================================================
    std::unique_ptr<LicenseThread> thread;
    LicenseWebview* licenseWebview = nullptr;
   #endif

    LicenseState state;
    ListenerList<LicenseController::StateChangedCallback> listeners;
    bool guiNotInitialisedYet = true;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LicenseController)
};