/**
 * @file llavatarlistitem.h
 * @brief avatar list item header file
 *
 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLAVATARLISTITEM_H
#define LL_LLAVATARLISTITEM_H

#include <boost/signals2.hpp>

#include "llpanel.h"
#include "llbutton.h"
#include "lltextbox.h"
#include "llstyle.h"

#include "llcallingcard.h" // for LLFriendObserver

class LLAvatarIconCtrl;
class LLOutputMonitorCtrl;
class LLAvatarName;
class LLIconCtrl;

class LLAvatarListItem : public LLPanel, public LLFriendObserver
{
public:
    struct Params : public LLInitParam::Block<Params, LLPanel::Params>
    {
        Optional<LLStyle::Params>   default_style,
                                    voice_call_invited_style,
                                    voice_call_joined_style,
                                    voice_call_left_style,
                                    online_style,
                                    offline_style;

        Optional<S32>               name_right_pad;

        Params();
    };

    typedef enum e_item_state_type {
        IS_DEFAULT,
        IS_VOICE_INVITED,
        IS_VOICE_JOINED,
        IS_VOICE_LEFT,
        IS_ONLINE,
        IS_OFFLINE,
    } EItemState;

    /**
     * Creates an instance of LLAvatarListItem.
     *
     * It is not registered with LLDefaultChildRegistry. It is built via LLUICtrlFactory::buildPanel
     * or via registered LLCallbackMap depend on passed parameter.
     *
     * @param not_from_ui_factory if true instance will be build with LLUICtrlFactory::buildPanel
     * otherwise it should be registered via LLCallbackMap before creating.
     */
    LLAvatarListItem(bool not_from_ui_factory = true);
    virtual ~LLAvatarListItem();

    virtual bool postBuild();

    /**
     * Processes notification from speaker indicator to update children when indicator's visibility is changed.
     */
    virtual void handleVisibilityChange ( bool new_visibility );
    virtual S32 notifyParent(const LLSD& info);
    virtual void onMouseLeave(S32 x, S32 y, MASK mask);
    virtual void onMouseEnter(S32 x, S32 y, MASK mask);
    virtual void setValue(const LLSD& value);
    virtual void changed(U32 mask); // from LLFriendObserver

    void setOnline(bool online);
    void updateAvatarName(); // re-query the name cache
    void setAvatarName(const std::string& name);
    void setAvatarToolTip(const std::string& tooltip);
    void setHighlight(const std::string& highlight);
    void setState(EItemState item_style);
    void setAvatarId(const LLUUID& id, const LLUUID& session_id, bool ignore_status_changes = false, bool is_resident = true);
    void setAvatarDistance(F32 distance);
    void setLastInteractionTime(U32 secs_since);
    //Show/hide profile/info btn, translating speaker indicator and avatar name coordinates accordingly
    void setShowProfileBtn(bool show);
    void setShowInfoBtn(bool show);
    void showSpeakingIndicator(bool show);
    void setShowPermissions(bool show) { mShowPermissions = show; };
    void showAvatarDistance(bool show);
    void showLastInteractionTime(bool show);
    void setAvatarIconVisible(bool visible);
    void setShowCompleteName(bool show) { mShowCompleteName = show;};

    const LLUUID& getAvatarId() const;
    std::string getAvatarName() const;
    std::string getAvatarToolTip() const;

    void onInfoBtnClick();
    void onProfileBtnClick();

    /*virtual*/ bool handleDoubleClick(S32 x, S32 y, MASK mask);

protected:
    /**
     * Contains indicator to show voice activity.
     */
    LLOutputMonitorCtrl* mSpeakingIndicator;

    LLAvatarIconCtrl* mAvatarIcon;

    /// Indicator for permission to see me online.
    LLIconCtrl* mIconPermissionOnline;
    /// Indicator for permission to see my position on the map.
    LLIconCtrl* mIconPermissionMap;
    /// Indicator for permission to edit my objects.
    LLIconCtrl* mIconPermissionEditMine;
    /// Indicator for permission to edit their objects.
    LLIconCtrl* mIconPermissionEditTheirs;

private:

    typedef enum e_online_status {
        E_OFFLINE,
        E_ONLINE,
        E_UNKNOWN,
    } EOnlineStatus;

    /**
     * Enumeration of item elements in order from right to left.
     *
     * updateChildren() assumes that indexes are in the such order to process avatar icon easier.
     *
     * @see updateChildren()
     */
    typedef enum e_avatar_item_child {
        ALIC_SPEAKER_INDICATOR,
        ALIC_PROFILE_BUTTON,
        ALIC_INFO_BUTTON,
        ALIC_PERMISSION_ONLINE,
        ALIC_PERMISSION_MAP,
        ALIC_PERMISSION_EDIT_MINE,
        ALIC_PERMISSION_EDIT_THEIRS,
        ALIC_INTERACTION_TIME,
        ALIC_DISTANCE,
        ALIC_NAME,
        ALIC_ICON,
        ALIC_COUNT,
    } EAvatarListItemChildIndex;

    void setNameInternal(const std::string& name, const std::string& highlight);
    void onAvatarNameCache(const LLAvatarName& av_name);

    std::string formatSeconds(U32 secs);

    typedef std::map<EItemState, LLColor4> icon_color_map_t;
    static icon_color_map_t& getItemIconColorMap();

    /**
     * Initializes widths of all children to use them while changing visibility of any of them.
     *
     * @see updateChildren()
     */
    static void initChildrenWidths(LLAvatarListItem* self);

    /**
     * Updates position and rectangle of visible children to fit all available item's width.
     */
    void updateChildren();

    /**
     * Update visibility of active permissions icons.
     *
     * Need to call updateChildren() afterwards to sort out their layout.
     */
    bool showPermissions(bool visible);

    /**
     * Gets child view specified by index.
     *
     * This method implemented via switch by all EAvatarListItemChildIndex values.
     * It is used to not store children in array or vector to avoid of increasing memory usage.
     */
    LLView* getItemChildView(EAvatarListItemChildIndex child_index);

    LLTextBox* mAvatarName;
    LLTextBox* mAvatarDistance;
    LLTextBox* mLastInteractionTime;
    LLStyle::Params mAvatarNameStyle;

    LLButton* mInfoBtn;
    LLButton* mProfileBtn;

    LLUUID mAvatarId;
    std::string mHighlihtSubstring; // substring to highlight
    EOnlineStatus mOnlineStatus;
    //Flag indicating that info/profile button shouldn't be shown at all.
    //Speaker indicator and avatar name coords are translated accordingly
    bool mShowInfoBtn;
    bool mShowProfileBtn;

    /// indicates whether to show icons representing permissions granted
    bool mShowPermissions;

    /// true when the mouse pointer is hovering over this item
    bool mHovered;

    bool mShowCompleteName;
    std::string mGreyOutUsername;

    void fetchAvatarName();
    boost::signals2::connection mAvatarNameCacheConnection;

    static bool sStaticInitialized; // this variable is introduced to improve code readability
    static S32  sLeftPadding; // padding to first left visible child (icon or name)
    static S32  sNameRightPadding; // right padding from name to next visible child

    /**
     * Contains widths of each child specified by EAvatarListItemChildIndex
     * including padding to the next right one.
     *
     * @see initChildrenWidths()
     */
    static S32 sChildrenWidths[ALIC_COUNT];

};

#endif //LL_LLAVATARLISTITEM_H