/**
 * @file lltoolmgr.cpp
 * @brief LLToolMgr class implementation
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "lltoolmgr.h"

#include "lluictrl.h"
#include "llmenugl.h"
#include "llfloaterreg.h"

//#include "llfirstuse.h"
// tools and manipulators
#include "llfloaterinspect.h"
#include "lltool.h"
#include "llmanipscale.h"
#include "llmarketplacefunctions.h"
#include "llselectmgr.h"
#include "lltoolbrush.h"
#include "lltoolcomp.h"
#include "lltooldraganddrop.h"
#include "lltoolface.h"
#include "lltoolfocus.h"
#include "lltoolgrab.h"
#include "lltoolindividual.h"
#include "lltoolmorph.h"
#include "lltoolpie.h"
#include "lltoolselectland.h"
#include "lltoolobjpicker.h"
#include "lltoolpipette.h"
#include "llagent.h"
#include "llagentcamera.h"
#include "llviewercontrol.h"
#include "llviewerjoystick.h"
#include "llviewermenu.h"
#include "llviewerparcelmgr.h"


// Used when app not active to avoid processing hover.
LLTool*         gToolNull   = NULL;

LLToolset*      gBasicToolset       = NULL;
LLToolset*      gCameraToolset      = NULL;
//LLToolset*        gLandToolset        = NULL;
LLToolset*      gMouselookToolset   = NULL;
LLToolset*      gFaceEditToolset    = NULL;

/////////////////////////////////////////////////////
// LLToolMgr

LLToolMgr::LLToolMgr()
    :
    mBaseTool(NULL),
    mSavedTool(NULL),
    mTransientTool( NULL ),
    mOverrideTool( NULL ),
    mSelectedTool( NULL ),
    mCurrentToolset( NULL )
{
    // Not a panel, register these callbacks globally.
    LLUICtrl::EnableCallbackRegistry::currentRegistrar().add("Build.Active", boost::bind(&LLToolMgr::inEdit, this));
    LLUICtrl::EnableCallbackRegistry::currentRegistrar().add("Build.Enabled", boost::bind(&LLToolMgr::canEdit, this));
    LLUICtrl::EnableCallbackRegistry::currentRegistrar().add("Build.EnabledOrActive", boost::bind(&LLToolMgr::buildEnabledOrActive, this));
    LLUICtrl::CommitCallbackRegistry::currentRegistrar().add("Build.Toggle", { boost::bind(&LLToolMgr::toggleBuildMode, this, _2) });
    LLUICtrl::EnableCallbackRegistry::currentRegistrar().add("Marketplace.Enabled", boost::bind(&LLToolMgr::canAccessMarketplace, this));
    LLUICtrl::CommitCallbackRegistry::currentRegistrar().add("Marketplace.Toggle", { boost::bind(&LLToolMgr::toggleMarketplace, this, _2) });

    gToolNull = new LLTool(LLStringUtil::null);  // Does nothing
    setCurrentTool(gToolNull);

    gBasicToolset       = new LLToolset();
    gCameraToolset      = new LLToolset();
//  gLandToolset        = new LLToolset();
    gMouselookToolset   = new LLToolset();
    gFaceEditToolset    = new LLToolset();
    gMouselookToolset->setShowFloaterTools(false);
    gFaceEditToolset->setShowFloaterTools(false);
}

void LLToolMgr::initTools()
{
    static bool initialized = false;
    if(initialized)
    {
        return;
    }
    initialized = true;
    gBasicToolset->addTool( LLToolPie::getInstance() );
    gBasicToolset->addTool( LLToolCamera::getInstance() );
    gCameraToolset->addTool( LLToolCamera::getInstance() );
    gBasicToolset->addTool( LLToolGrab::getInstance() );
    gBasicToolset->addTool( LLToolCompTranslate::getInstance() );
    gBasicToolset->addTool( LLToolCompCreate::getInstance() );
    gBasicToolset->addTool( LLToolBrushLand::getInstance() );
    gMouselookToolset->addTool( LLToolCompGun::getInstance() );
    gBasicToolset->addTool( LLToolCompInspect::getInstance() );
    gFaceEditToolset->addTool( LLToolCamera::getInstance() );

    // On startup, use "select" tool
    setCurrentToolset(gBasicToolset);

    gBasicToolset->selectTool( LLToolPie::getInstance() );
}

LLToolMgr::~LLToolMgr()
{
    delete gBasicToolset;
    gBasicToolset = NULL;

    delete gMouselookToolset;
    gMouselookToolset = NULL;

    delete gFaceEditToolset;
    gFaceEditToolset = NULL;

    delete gCameraToolset;
    gCameraToolset = NULL;

    delete gToolNull;
    gToolNull = NULL;
}

bool LLToolMgr::usingTransientTool()
{
    return mTransientTool != nullptr;
}

void LLToolMgr::setCurrentToolset(LLToolset* current)
{
    if (!current)
        return;

    // switching toolsets?
    if (current != mCurrentToolset)
    {
        // deselect current tool
        if (mSelectedTool)
        {
            mSelectedTool->handleDeselect();
        }
        mCurrentToolset = current;
        // select first tool of new toolset only if toolset changed
        mCurrentToolset->selectFirstTool();
    }

    // update current tool based on new toolset
    setCurrentTool( mCurrentToolset->getSelectedTool() );
}

LLToolset* LLToolMgr::getCurrentToolset()
{
    return mCurrentToolset;
}

void LLToolMgr::setCurrentTool( LLTool* tool )
{
    if (mTransientTool)
    {
        mTransientTool = NULL;
    }

    mBaseTool = tool;
    updateToolStatus();

    mSavedTool = NULL;
}

LLTool* LLToolMgr::getCurrentTool()
{
    MASK override_mask = gKeyboard ? gKeyboard->currentMask(true) : 0;

    LLTool* cur_tool = NULL;
    // always use transient tools if available
    if (mTransientTool)
    {
        mOverrideTool = NULL;
        cur_tool = mTransientTool;
    }
    // tools currently grabbing mouse input will stay active
    else if (mSelectedTool && mSelectedTool->hasMouseCapture())
    {
        cur_tool = mSelectedTool;
    }
    else
    {
        mOverrideTool = mBaseTool ? mBaseTool->getOverrideTool(override_mask) : NULL;

        // use override tool if available otherwise drop back to base tool
        cur_tool = mOverrideTool ? mOverrideTool : mBaseTool;
    }

    LLTool* prev_tool = mSelectedTool;
    // Set the selected tool to avoid infinite recursion
    mSelectedTool = cur_tool;

    //update tool selection status
    if (prev_tool != cur_tool)
    {
        if (prev_tool)
        {
            prev_tool->handleDeselect();
        }
        if (cur_tool)
        {
            if (    LLToolCompInspect::getInstance()->isToolCameraActive()
                &&  prev_tool == LLToolCamera::getInstance()
                &&  cur_tool == LLToolPie::getInstance() )
            {
                LLFloaterInspect * inspect_instance = LLFloaterReg::getTypedInstance<LLFloaterInspect>("inspect");
                if(inspect_instance && inspect_instance->getVisible())
                {
                    setTransientTool(LLToolCompInspect::getInstance());
                }
            }
            else
            {
                cur_tool->handleSelect();
            }
        }
    }

    return mSelectedTool;
}

LLTool* LLToolMgr::getBaseTool()
{
    return mBaseTool;
}

void LLToolMgr::updateToolStatus()
{
    // call getcurrenttool() to calculate active tool and call handleSelect() and handleDeselect() immediately
    // when active tool changes
    getCurrentTool();
}

bool LLToolMgr::inEdit()
{
    return mBaseTool != LLToolPie::getInstance() && mBaseTool != gToolNull;
}

bool LLToolMgr::canEdit()
{
    return LLViewerParcelMgr::getInstance()->allowAgentBuild();
}

bool LLToolMgr::buildEnabledOrActive()
{
    return LLFloaterReg::instanceVisible("build") || canEdit();
}

void LLToolMgr::toggleBuildMode(const LLSD& sdname)
{
    const std::string& param = sdname.asString();

    LLFloaterReg::toggleInstanceOrBringToFront("build");
    if (param == "build" && !canEdit())
    {
        return;
    }

    bool build_visible = LLFloaterReg::instanceVisible("build");
    if (build_visible)
    {
        ECameraMode camMode = gAgentCamera.getCameraMode();
        if (CAMERA_MODE_MOUSELOOK == camMode || CAMERA_MODE_CUSTOMIZE_AVATAR == camMode)
        {
            // pull the user out of mouselook or appearance mode when entering build mode
            handle_reset_view();
        }

        if (gSavedSettings.getBOOL("EditCameraMovement"))
        {
            // camera should be set
            if (LLViewerJoystick::getInstance()->getOverrideCamera())
            {
                handle_toggle_flycam();
            }

            if (gAgentCamera.getFocusOnAvatar())
            {
                // zoom in if we're looking at the avatar
                gAgentCamera.setFocusOnAvatar(false, ANIMATE);
                gAgentCamera.setFocusGlobal(gAgent.getPositionGlobal() + 2.0 * LLVector3d(gAgent.getAtAxis()));
                gAgentCamera.cameraZoomIn(0.666f);
                gAgentCamera.cameraOrbitOver( 30.f * DEG_TO_RAD );
            }
        }


        setCurrentToolset(gBasicToolset);
        getCurrentToolset()->selectTool( LLToolCompCreate::getInstance() );

        // Could be first use
        //LLFirstUse::useBuild();

        gAgentCamera.resetView(false);

        // avoid spurious avatar movements
        LLViewerJoystick::getInstance()->setNeedsReset();

    }
    else
    {
        if (gSavedSettings.getBOOL("EditCameraMovement"))
        {
            // just reset the view, will pull us out of edit mode
            handle_reset_view();
        }
        else
        {
            // manually disable edit mode, but do not affect the camera
            gAgentCamera.resetView(false);
            LLFloaterReg::hideInstance("build");
            gViewerWindow->showCursor();
        }
        // avoid spurious avatar movements pulling out of edit mode
        LLViewerJoystick::getInstance()->setNeedsReset();
    }

}

bool LLToolMgr::inBuildMode()
{
    // when entering mouselook inEdit() immediately returns true before
    // cameraMouselook() actually starts returning true.  Also, appearance edit
    // sets build mode to true, so let's exclude that.
    bool b=(inEdit()
            && !gAgentCamera.cameraMouselook()
            && mCurrentToolset != gFaceEditToolset);

    return b;
}

bool LLToolMgr::canAccessMarketplace()
{
    return (LLMarketplaceData::instance().getSLMStatus() != MarketplaceStatusCodes::MARKET_PLACE_NOT_MIGRATED_MERCHANT);
}

void LLToolMgr::toggleMarketplace(const LLSD& sdname)
{
    const std::string& param = sdname.asString();

    if ((param != "marketplace") || !canAccessMarketplace())
    {
        return;
    }

    LLFloaterReg::toggleInstanceOrBringToFront("marketplace_listings");
}

void LLToolMgr::setTransientTool(LLTool* tool)
{
    if (!tool)
    {
        clearTransientTool();
    }
    else
    {
        if (mTransientTool)
        {
            mTransientTool = NULL;
        }

        mTransientTool = tool;
    }

    updateToolStatus();
}

void LLToolMgr::clearTransientTool()
{
    if (mTransientTool)
    {
        mTransientTool = NULL;
        if (!mBaseTool)
        {
            LL_WARNS() << "mBaseTool is NULL" << LL_ENDL;
        }
    }
    updateToolStatus();
}


void LLToolMgr::onAppFocusLost()
{
    if (LLApp::isExiting())
        return;

    if (mSelectedTool)
    {
        mSelectedTool->handleDeselect();
    }
    updateToolStatus();
}

void LLToolMgr::onAppFocusGained()
{
    if (mSelectedTool)
    {
        mSelectedTool->handleSelect();
    }
    updateToolStatus();
}

void LLToolMgr::clearSavedTool()
{
    mSavedTool = NULL;
}

/////////////////////////////////////////////////////
// LLToolset

void LLToolset::addTool(LLTool* tool)
{
    mToolList.push_back( tool );
    if( !mSelectedTool )
    {
        mSelectedTool = tool;
    }
}


void LLToolset::selectTool(LLTool* tool)
{
    mSelectedTool = tool;
    LLToolMgr::getInstance()->setCurrentTool( mSelectedTool );
}


void LLToolset::selectToolByIndex( S32 index )
{
    LLTool *tool = (index >= 0 && index < (S32)mToolList.size()) ? mToolList[index] : NULL;
    if (tool)
    {
        mSelectedTool = tool;
        LLToolMgr::getInstance()->setCurrentTool( tool );
    }
}

bool LLToolset::isToolSelected( S32 index )
{
    LLTool *tool = (index >= 0 && index < (S32)mToolList.size()) ? mToolList[index] : NULL;
    return (tool == mSelectedTool);
}


void LLToolset::selectFirstTool()
{
    mSelectedTool = (0 < mToolList.size()) ? mToolList[0] : NULL;
    LLToolMgr::getInstance()->setCurrentTool( mSelectedTool );
}


void LLToolset::selectNextTool()
{
    LLTool* next = NULL;
    for( tool_list_t::iterator iter = mToolList.begin();
         iter != mToolList.end(); )
    {
        LLTool* cur = *iter++;
        if( cur == mSelectedTool && iter != mToolList.end() )
        {
            next = *iter;
            break;
        }
    }

    if( next )
    {
        mSelectedTool = next;
        LLToolMgr::getInstance()->setCurrentTool( mSelectedTool );
    }
    else
    {
        selectFirstTool();
    }
}

void LLToolset::selectPrevTool()
{
    LLTool* prev = NULL;
    for( tool_list_t::reverse_iterator iter = mToolList.rbegin();
         iter != mToolList.rend(); )
    {
        LLTool* cur = *iter++;
        if( cur == mSelectedTool && iter != mToolList.rend() )
        {
            prev = *iter;
            break;
        }
    }

    if( prev )
    {
        mSelectedTool = prev;
        LLToolMgr::getInstance()->setCurrentTool( mSelectedTool );
    }
    else if (mToolList.size() > 0)
    {
        selectToolByIndex((S32)mToolList.size()-1);
    }
}

////////////////////////////////////////////////////////////////////////////