/*
 * Squawk messenger. 
 * Copyright (C) 2019  Yury Gubich <blue@macaw.me>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef CONVERSATION_H
#define CONVERSATION_H

#include <QWidget>
#include <QScopedPointer>
#include <QMap>
#include <QMimeData>
#include <QFileInfo>

#include "shared/message.h"
#include "order.h"
#include "ui/models/account.h"
#include "ui/models/roster.h"
#include "ui/utils/messageline.h"
#include "ui/utils/resizer.h"
#include "ui/utils/flowlayout.h"
#include "ui/utils/badge.h"
#include "shared/icons.h"
#include "shared/utils.h"

namespace Ui
{
class Conversation;
}

class KeyEnterReceiver : public QObject
{
    Q_OBJECT
public:
    KeyEnterReceiver(QObject* parent = 0);
protected:
    bool ownEvent;
    bool eventFilter(QObject* obj, QEvent* event);
    
signals:
    void enterPressed();
};

class VisibilityCatcher : public QObject {
    Q_OBJECT
public:
    VisibilityCatcher(QWidget* parent = nullptr);
    
protected:
    bool eventFilter(QObject* obj, QEvent* event) override;

signals:
    void hidden();
    void shown();
};

class Conversation : public QWidget
{
    Q_OBJECT
public:
    Conversation(bool muc, Models::Account* acc, const QString pJid, const QString pRes, QWidget* parent = 0);
    ~Conversation();
    
    QString getJid() const;
    QString getAccount() const;
    QString getPalResource() const;
    Models::Roster::ElId getId() const;
    virtual void addMessage(const Shared::Message& data);
    
    void setPalResource(const QString& res);
    void responseArchive(const std::list<Shared::Message> list);
    void showEvent(QShowEvent * event) override;
    void responseLocalFile(const QString& messageId, const QString& path);
    void fileError(const QString& messageId, const QString& error);
    void responseFileProgress(const QString& messageId, qreal progress);
    virtual void setAvatar(const QString& path);
    void changeMessage(const QString& id, const QMap<QString, QVariant>& data);
    void setFeedFrames(bool top, bool right, bool bottom, bool left);
    virtual void appendMessageWithUpload(const Shared::Message& data, const QString& path);
    
signals:
    void sendMessage(const Shared::Message& message);
    void sendMessage(const Shared::Message& message, const QString& path);
    void requestArchive(const QString& before);
    void shown();
    void requestLocalFile(const QString& messageId, const QString& url);
    void downloadFile(const QString& messageId, const QString& url);
    
protected:
    virtual void setName(const QString& name);
    void applyVisualEffects();
    virtual Shared::Message createMessage() const;
    void setStatus(const QString& status);
    void addAttachedFile(const QString& path);
    void removeAttachedFile(Badge* badge);
    void clearAttachedFiles();
    void dragEnterEvent(QDragEnterEvent* event) override;
    void dragLeaveEvent(QDragLeaveEvent* event) override;
    void dropEvent(QDropEvent* event) override;
    
protected slots:
    void onEnterPressed();
    void onMessagesResize(int amount);
    void onSliderValueChanged(int value);
    void onAttach();
    void onFileSelected();
    void onScrollResize();
    void onBadgeClose();
    void onClearButton();
    void onTextEditDocSizeChanged(const QSizeF& size);
    void onAccountChanged(Models::Item* item, int row, int col);
    
public:
    const bool isMuc;
    
protected:
    enum Scroll {
        nothing,
        keep,
        down
    };
    Models::Account* account;
    QString palJid;
    QString activePalResource;
    MessageLine* line;
    QScopedPointer<Ui::Conversation> m_ui;
    KeyEnterReceiver ker;
    Resizer scrollResizeCatcher;
    VisibilityCatcher vis;
    QString thread;
    QLabel* statusIcon;
    QLabel* statusLabel;
    FlowLayout* filesLayout;
    QWidget* overlay;
    W::Order<Badge*, Badge::Comparator> filesToAttach;
    Scroll scroll;
    bool manualSliderChange;
    bool requestingHistory;
    bool everShown;
    bool tsb;           //transient scroll bars
};

#endif // CONVERSATION_H