/**
 * @file llcommandmanager.h
 * @brief LLCommandManager class to hold commands
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2011, 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_LLCOMMANDMANAGER_H
#define LL_LLCOMMANDMANAGER_H

#include "llinitparam.h"
#include "llsingleton.h"


class LLCommand;
class LLCommandManager;


class LLCommandId
{
public:
    friend class LLCommand;
    friend class LLCommandManager;

    struct Params : public LLInitParam::Block<Params>
    {
        Mandatory<std::string> name;

        Params()
        :   name("name")
        {}
    };

    LLCommandId(const std::string& name)
    {
        mUUID = LLUUID::generateNewID(name);
    }

    LLCommandId(const Params& p)
    {
        mUUID = LLUUID::generateNewID(p.name);
    }

    LLCommandId(const LLUUID& uuid)
    :   mUUID(uuid)
    {}

    const LLUUID& uuid() const { return mUUID; }

    bool operator!=(const LLCommandId& command) const
    {
        return (mUUID != command.mUUID);
    }

    bool operator==(const LLCommandId& command) const
    {
        return (mUUID == command.mUUID);
    }

    static const LLCommandId null;

private:
    LLUUID      mUUID;
};

typedef std::list<LLCommandId> command_id_list_t;


class LLCommand
{
public:
    struct Params : public LLInitParam::Block<Params>
    {
        Mandatory<bool>         available_in_toybox;
        Mandatory<std::string>  icon;
        Mandatory<std::string>  label_ref;
        Mandatory<std::string>  name;
        Mandatory<std::string>  tooltip_ref;

        Mandatory<std::string>  execute_function;
        Optional<LLSD>          execute_parameters;

        Optional<std::string>   execute_stop_function;
        Optional<LLSD>          execute_stop_parameters;

        Optional<std::string>   is_enabled_function;
        Optional<LLSD>          is_enabled_parameters;

        Optional<std::string>   is_running_function;
        Optional<LLSD>          is_running_parameters;

        Optional<std::string>   is_starting_function;
        Optional<LLSD>          is_starting_parameters;

        Optional<bool>          is_flashing_allowed;

        Params();
    };

    LLCommand(const LLCommand::Params& p);

    const bool availableInToybox() const { return mAvailableInToybox; }
    const std::string& icon() const { return mIcon; }
    const LLCommandId& id() const { return mIdentifier; }
    const std::string& labelRef() const { return mLabelRef; }
    const std::string& name() const { return mName; }
    const std::string& tooltipRef() const { return mTooltipRef; }

    const std::string& executeFunctionName() const { return mExecuteFunction; }
    const LLSD& executeParameters() const { return mExecuteParameters; }

    const std::string& executeStopFunctionName() const { return mExecuteStopFunction; }
    const LLSD& executeStopParameters() const { return mExecuteStopParameters; }

    const std::string& isEnabledFunctionName() const { return mIsEnabledFunction; }
    const LLSD& isEnabledParameters() const { return mIsEnabledParameters; }

    const std::string& isRunningFunctionName() const { return mIsRunningFunction; }
    const LLSD& isRunningParameters() const { return mIsRunningParameters; }

    const std::string& isStartingFunctionName() const { return mIsStartingFunction; }
    const LLSD& isStartingParameters() const { return mIsStartingParameters; }

    bool isFlashingAllowed() const { return mIsFlashingAllowed; }

private:
    LLCommandId mIdentifier;

    bool        mAvailableInToybox;
    std::string mIcon;
    std::string mLabelRef;
    std::string mName;
    std::string mTooltipRef;

    std::string mExecuteFunction;
    LLSD        mExecuteParameters;

    std::string mExecuteStopFunction;
    LLSD        mExecuteStopParameters;

    std::string mIsEnabledFunction;
    LLSD        mIsEnabledParameters;

    std::string mIsRunningFunction;
    LLSD        mIsRunningParameters;

    std::string mIsStartingFunction;
    LLSD        mIsStartingParameters;

    bool        mIsFlashingAllowed;
};


class LLCommandManager
:   public LLSingleton<LLCommandManager>
{
    LLSINGLETON(LLCommandManager);
    ~LLCommandManager();

public:
    struct Params : public LLInitParam::Block<Params>
    {
        Multiple< LLCommand::Params, AtLeast<1> > commands;

        Params()
            :   commands("command")
        {
        }
    };

    U32 commandCount() const;
    LLCommand * getCommand(U32 commandIndex);
    LLCommand * getCommand(const LLCommandId& commandId);
    LLCommand * getCommand(const std::string& name);

    LLSD getCommandNames();

    static bool load();

protected:
    void addCommand(LLCommand * command);

private:
    typedef std::map<LLUUID, size_t>    CommandIndexMap;
    typedef std::vector<LLCommand *>    CommandVector;

    CommandVector   mCommands;
    CommandIndexMap mCommandIndices;
};


#endif // LL_LLCOMMANDMANAGER_H