/**
 * @file chat_view.h
 * @ingroup NetworkingWidgets
 * @ingroup Lobby
 */
//! \todo Document this file.

#ifndef CHATVIEW_H
#define CHATVIEW_H

#include "libcockatrice/protocol/pb/serverinfo_user.pb.h"

#include <QColor>
#include <QDateTime>
#include <QList>
#include <QMap>
#include <QString>
#include <QStringList>
#include <QTextBlock>
#include <QTextBrowser>
#include <QTextCharFormat>
#include <QTextCursor>
#include <QTextFragment>
#include <QVector>
#include <libcockatrice/network/server/remote/room_message_type.h>
#include <libcockatrice/network/server/remote/user_level.h>
#include <qtmetamacros.h>

class AbstractGame;
class UserContextMenu;
class UserListProxy;
class QAction;
class QPoint;
class QUrl;
class QWidget;
class TabSupervisor;
struct CardRef;
template <typename Enum> class QFlags;

class UserMessagePosition
{
public:
    UserMessagePosition(QTextCursor &cursor);
    int relativePosition;
    QTextBlock block;
};

struct ChatLogEntry
{
    QString userName;
    QString message;
    QDateTime timestamp;
};

class ChatView : public QTextBrowser
{
    Q_OBJECT
protected:
    TabSupervisor *const tabSupervisor;
    AbstractGame *const game;

private:
    enum HoveredItemType
    {
        HoveredNothing,
        HoveredUrl,
        HoveredCard,
        HoveredUser
    };
    const UserListProxy *const userListProxy;
    UserContextMenu *userContextMenu;
    QString lastSender;
    QString ownUserName;
    QString mention;
    QTextCharFormat mentionFormat;
    QTextCharFormat highlightFormat;
    QTextCharFormat mentionFormatOtherUser;
    QTextCharFormat defaultFormat;
    QStringList highlightedWords;
    bool evenNumber;
    bool showTimestamps;
    bool stickToBottom = false;
    HoveredItemType hoveredItemType;
    QString hoveredContent;
    QAction *messageClicked;
    QMap<QString, QVector<UserMessagePosition>> userMessagePositions;
    QList<ChatLogEntry> chatHistory;
    static constexpr int MAX_CHAT_HISTORY = 200;

    [[nodiscard]] QTextFragment getFragmentUnderMouse(const QPoint &pos) const;
    QTextCursor prepareBlock(bool same = false);
    void scrollToBottom();
    void appendCardTag(QTextCursor &cursor, const QString &cardName);
    void appendUrlTag(QTextCursor &cursor, QString url);
    void appendGameLinkTag(QTextCursor &cursor, const QString &url);
    static QColor getCustomMentionColor();
    static QColor getCustomHighlightColor();
    void showSystemPopup(const QString &userName);
    bool isModeratorSendingGlobal(QFlags<ServerInfo_User::UserLevelFlag> userLevelFlag, QString message);
    void checkTag(QTextCursor &cursor, QString &message);
    void checkMention(QTextCursor &cursor, QString &message, const QString &userName, UserLevelFlags userLevel);
    void checkWord(QTextCursor &cursor, QString &message);
    QString extractNextWord(QString &message, QString &rest);

    QColor otherUserColor = QColor(0, 65, 255); // dark blue
    QColor serverMessageColor = QColor(0x85, 0x15, 0x15);
    QColor linkColor;
    QColor unresolvedCardTagColor;

private slots:
    void openLink(const QUrl &link);
    void actMessageClicked();
    void adjustColorsToPalette();
    void applyChatFont();
    void refreshBlockColors();
    void onScrollBarRangeChanged();
    void onScrollBarValueChanged(int value);

public:
    ChatView(TabSupervisor *_tabSupervisor, AbstractGame *_game, bool _showTimestamps, QWidget *parent = nullptr);
    void retranslateUi();
    void appendHtml(const QString &html);
    virtual void
    appendHtmlServerMessage(const QString &html, bool optionalIsBold = false, QString optionalFontColor = QString());
    void appendMessage(QString message,
                       RoomMessageTypeFlags messageType = {},
                       const ServerInfo_User &userInfo = {},
                       bool playerBold = false);
    void clearChat();
    void redactMessages(const QString &userName, int amount);
    QString getRecentChatLog(int maxMessages = 50) const;

protected:
    [[nodiscard]] virtual QString getCurrentTime() const;
    void enterEvent(QEnterEvent *event) override;
    void leaveEvent(QEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;
signals:
    void openMessageDialog(const QString &userName, bool focus);
    void cardNameHovered(QString cardName);
    void showCardInfoPopup(const QPoint &pos, const CardRef &cardRef);
    void deleteCardInfoPopup(QString cardName);
    void addMentionTag(QString mentionTag);
    void messageClickedSignal();
    void showMentionPopup(const QString &userName);
    void cockatriceLinkActivated(const QString &url);
};

#endif