/*****************************************************************************
*
* Copyright (c) 2000 - 2017, Lawrence Livermore National Security, LLC
* Produced at the Lawrence Livermore National Laboratory
* LLNL-CODE-442911
* All rights reserved.
*
* This file is  part of VisIt. For  details, see https://visit.llnl.gov/.  The
* full copyright notice is contained in the file COPYRIGHT located at the root
* of the VisIt distribution or at http://www.llnl.gov/visit/copyright.html.
*
* Redistribution  and  use  in  source  and  binary  forms,  with  or  without
* modification, are permitted provided that the following conditions are met:
*
*  - Redistributions of  source code must  retain the above  copyright notice,
*    this list of conditions and the disclaimer below.
*  - Redistributions in binary form must reproduce the above copyright notice,
*    this  list of  conditions  and  the  disclaimer (as noted below)  in  the
*    documentation and/or other materials provided with the distribution.
*  - Neither the name of  the LLNS/LLNL nor the names of  its contributors may
*    be used to endorse or promote products derived from this software without
*    specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR  IMPLIED WARRANTIES, INCLUDING,  BUT NOT  LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND  FITNESS FOR A PARTICULAR  PURPOSE
* ARE  DISCLAIMED. IN  NO EVENT  SHALL LAWRENCE  LIVERMORE NATIONAL  SECURITY,
* LLC, THE  U.S.  DEPARTMENT OF  ENERGY  OR  CONTRIBUTORS BE  LIABLE  FOR  ANY
* DIRECT,  INDIRECT,   INCIDENTAL,   SPECIAL,   EXEMPLARY,  OR   CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT  LIMITED TO, PROCUREMENT OF  SUBSTITUTE GOODS OR
* SERVICES; LOSS OF  USE, DATA, OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER
* CAUSED  AND  ON  ANY  THEORY  OF  LIABILITY,  WHETHER  IN  CONTRACT,  STRICT
* LIABILITY, OR TORT  (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING IN ANY  WAY
* OUT OF THE  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*****************************************************************************/

#include <MapNode.h>
#include <Connection.h>
#include <visitstream.h>
#include <cstdlib>

using namespace std;

// ****************************************************************************
//  Method:  MapNode::MapNode
//
//  Purpose:
//
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
MapNode::MapNode()
{;}

MapNode::MapNode(const MapNode &node)
: Variant(node)
{
    // copy entires
    entries = node.entries;
}

MapNode::MapNode(const XMLNode &node,bool decodeString)
{
    SetValue(node,decodeString);
}

MapNode::MapNode(const XMLNode *node, bool decodeString)
{
    SetValue(*node,decodeString);
}

MapNode::MapNode(const JSONNode &node, bool decodeString)
{
    SetValue(node, decodeString);
}

MapNode::MapNode(const JSONNode *node, bool decodeString)
{
    SetValue(*node,decodeString);
}

MapNode::MapNode(const JSONNode &node,const JSONNode &metadata, bool decodeString)
{
    SetValue(node, metadata, decodeString);
}

MapNode::MapNode(const JSONNode *node, const JSONNode* metadata, bool decodeString)
{
    SetValue(*node,*metadata,decodeString);
}

// ****************************************************************************
//  Method:  MapNode::~MapNode
//
//  Purpose:
//     MapNode destructor.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
MapNode::~MapNode()
{
    // cleanout nodes
}

// ****************************************************************************
//  Method:  MapNode::operator=(avtPolynomial)
//
//  Purpose:
//     MapNode assignment operator.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
//  Modifications:
//    Brad Whitlock, Mon Jan 12 10:50:14 PST 2009
//    Clear out the entries node before calling Variant::SetValue.
//
// ****************************************************************************

MapNode &
MapNode::operator=(const MapNode &node)
{
    // copy entries
    if(this != &node)
    {
        if(node.entries.size() > 0)
            entries = node.entries;
        else
        {
            entries.clear();
            Variant::SetValue(node);
        }
    }
    return *this;
}

MapNode &
MapNode::operator=(bool val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(char val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(unsigned char val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const char *val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(int val)
{
    Variant::operator=(val);
    return *this;
}


MapNode &
MapNode::operator=(long val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(float val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(double val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const string& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const boolVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const charVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const unsignedCharVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const intVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const longVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const floatVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const doubleVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const stringVector& val)
{
    Variant::operator=(val);
    return *this;
}

MapNode &
MapNode::operator=(const Variant& val)
{
    Variant::operator=(val);
    return *this;
}



// ****************************************************************************
//  Method:  MapNode::operator[]
//
//  Purpose:
//     Dictionary access operator.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
MapNode &
MapNode::operator[](const string &key)
{
    return entries[key];
}




// ****************************************************************************
//  Method:  MapNode::GetEntry
//
//  Purpose:
//     MapNode entry access.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
MapNode *
MapNode::GetEntry(const string &key)
{
    return &entries[key];
}

// ****************************************************************************
//  Method:  MapNode::GetEntry
//
//  Purpose:
//     MapNode entry access.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
const MapNode *
MapNode::GetEntry(const string &key) const
{
    map<string,MapNode>::const_iterator itr = entries.find(key);
    if(itr == entries.end())
        return NULL;
    else
        return &itr->second;
}

// ****************************************************************************
//  Method:  MapNode::HasEntry
//
//  Purpose:
//     Checks if the map has an entry for the given key.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 10, 2007
//
// ****************************************************************************
bool
MapNode::HasEntry(const string &key) const
{
    return entries.find(key) != entries.end();
}

// ****************************************************************************
//  Method:  MapNode::HasNumericEntry
//
//  Purpose:
//     Checks if the map has a numeric entry for the given key.
//
//  Programmer:  Kathleen Biagas 
//  Creation:    January 9, 2012
//
// ****************************************************************************
bool
MapNode::HasNumericEntry(const string &key) const
{
    map<string,MapNode>::const_iterator itr = entries.find(key);
    if(itr == entries.end())
        return false;
    else
        return itr->second.IsNumeric();
}

// ****************************************************************************
//  Method:  MapNode::HasNumericVectorEntry
//
//  Purpose:
//     Checks if the map has a numeric vector entry for the given key.
//
//  Programmer:  Kathleen Biagas 
//  Creation:    January 9, 2012
//
// ****************************************************************************
bool
MapNode::HasNumericVectorEntry(const string &key) const
{
    map<string,MapNode>::const_iterator itr = entries.find(key);
    if(itr == entries.end())
        return false;
    else
        return itr->second.IsNumericVector();
}


// ****************************************************************************
//  Method:  MapNode::GetEntryNames
//
//  Purpose:
//     Returns all map key names in the result vector.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
void
MapNode::GetEntryNames(stringVector &result) const
{
    result.clear();
    map<string,MapNode>::const_iterator itr;
    for(itr = entries.begin(); itr != entries.end(); ++itr)
        result.push_back(itr->first);
}

// ****************************************************************************
// Method: MapNode::Reset
//
// Purpose: 
//   Reset the mapnode.
//
// Programmer: Brad Whitlock
// Creation:   Fri Jan  9 10:14:09 PST 2009
//
// Modifications:
//   
// ****************************************************************************

void
MapNode::Reset()
{
    entries.clear();
    Variant::Reset();
}

// ****************************************************************************
//  Method:  MapNode::ToXML
//
//  Purpose:
//     Creates an xml string representation of this node.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
string
MapNode::ToXML(bool encodeToString) const
{
    return ToXMLNode(encodeToString).ToString();
}

string
MapNode::ToJSON(bool encodeToString) const
{
    return ToJSONNode(encodeToString).ToString();
}

// ****************************************************************************
//  Method:  MapNode::ToXMLNode
//
//  Purpose:
//     Creates an xml representation of this node.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
// ****************************************************************************
XMLNode
MapNode::ToXMLNode(bool encodeString) const
{
    XMLNode node;
    node.Name() = "map_node";
    // save children if not a value node
    if(entries.size() > 0 && Type() == 0)
    {
        map<string,MapNode>::const_iterator itr;
        for(itr = entries.begin(); itr != entries.end(); ++itr)
        {
            XMLNode *child = node.AddChild(itr->second.ToXMLNode(encodeString));
            child->Attribute("key") = itr->first;
        }    
    }
    else // save value, if we have a value
    {
        node.AddChild(Variant::ToXMLNode(encodeString));
    }
    
    return node;
}

/// JSON has fewer types to map, so a meta structure is added to be able
/// reverse the mapping, the metastructure contains type information for each
/// item..
/// parent = { contents = object, metadata = object }
/// SetValue can now use this to appropriately map back to VisIt internal structures..
JSONNode
MapNode::ToJSONNode(bool encodeString,bool id) const
{
    JSONNode parent;

    /// Fill out types..
    parent["data"] = ToJSONNodeData(encodeString);
    parent["metadata"] = ToJSONNodeMetaData(id);

    return parent;
}

JSONNode
MapNode::ToJSONNodeData(bool encodeString) const
{
    /// Fill out contents...
    JSONNode node;
    // save children if not a value node
    if(entries.size() > 0 && Type() == 0)
    {
        map<string,MapNode>::const_iterator itr;
        for(itr = entries.begin(); itr != entries.end(); ++itr)
            node[itr->first] = itr->second.ToJSONNodeData(encodeString);
    }
    else // save value, if we have a value
    {
        node = Variant::ToJSONNode(encodeString,true);
    }

    return node;
}

JSONNode
MapNode::ToJSONNodeMetaData(bool id) const
{
    JSONNode node;
    // save children if not a value node
    if(entries.size() > 0 && Type() == 0)
    {
        map<string,MapNode>::const_iterator itr;
        for(itr = entries.begin(); itr != entries.end(); ++itr)
            node[itr->first] = itr->second.ToJSONNodeMetaData(id);
    }
    else // save value, if we have a value
    {
        node = Variant::ToJSONNodeMetaData(id);
    }

    return node;
}

// ****************************************************************************
//  Method:  MapNode::SetValue
//
//  Purpose:
//     Loads a MapNode from a xml representation.
//
//  Programmer:  Cyrus Harrison
//  Creation:    December 14, 2007
//
//  Modifications:
//
//    Tom Fogal, Thu Aug 21 14:28:43 EDT 2008
//    Remove an unused variable.
//
// ****************************************************************************
void 
MapNode::SetValue(const XMLNode &node,bool decodeString)
{
    entries.clear();
    int nchildren = node.GetNumChildren();    
    if(node.Name()!="map_node" || nchildren == 0)
        return; // error

    // find out if we have child nodes, or if this node is a value node
    if(nchildren == 1 && node.GetChild(0)->Name() == "variant")
    {
        Variant::SetValue(node.GetChild(0),decodeString);
    }
    else
    {
        for(int i=0;i<nchildren;i++)
        {
            XMLNode *child = node.GetChild(i);
            // children should have a key ....
            entries[child->Attribute("key")] = MapNode(child,decodeString);
        }   
    }
}

// ****************************************************************************
//  Method:  Variant::SetValue
//
//  Purpose:
//     Sets this variant's value from an json node. The MapNode must have a
//     data component and a metadata component. This is due to the fact that
//     JSON has fewer components than MapNode
//
//  Programmer:  Hari Krishnan
//  Creation:    October 13, 2012
//
//  Modifications:
//
// ****************************************************************************
void
MapNode::SetValue(const JSONNode &node,bool decodeString)
{
    entries.clear();

    if(node.GetType() != JSONNode::JSONOBJECT) return;

    const JSONNode::JSONObject& object = node.GetJsonObject();

    //if( object.find("data") == object.end() ||
    //    object.find("metadata") == object.end()) return;

    /// Since JSON has fewer types than VisIt, we need a way to remap the types
    /// back to mapnode, I chose to separate the data and metadata.
    /// This way users can use the data object as a structure..

    JSONNode data, metadata;
    for(JSONNode::JSONObject::const_iterator itr = object.begin(); itr != object.end(); ++itr)
    {
        if(itr->first == "data")
            data = itr->second;
        if(itr->first == "metadata")
            metadata = itr->second;
    }

    SetValue(data,metadata,decodeString);
}

// ****************************************************************************
//  Method:  Variant::SetValue
//
//  Purpose:
//     Sets this variant's value from an json node. The MapNode must have a
//     data component and a metadata component. This is due to the fact that
//     JSON has fewer components than MapNode
//
//  Programmer:  Hari Krishnan
//  Creation:    October 13, 2012
//
//  Modifications:
//
// ****************************************************************************

void
MapNode::SetValue(const JSONNode& data, const JSONNode& metadata, bool decodeString)
{
    int data_type = 0;

    if(metadata.GetType() == JSONNode::JSONINTEGER){
        data_type = metadata.GetInt();
    }
    else
    {
        const string name = metadata.GetString();

        data_type = isdigit(name[0]) ? atoi(name.c_str()) :
                                       NameToTypeID(name);
    }

    if(data_type == 0 && data.GetType() == JSONNode::JSONOBJECT)
    {
        const JSONNode::JSONObject& object = data.GetJsonObject();
        const JSONNode::JSONObject& mobject = metadata.GetJsonObject();
        JSONNode::JSONObject::const_iterator itr  = object.begin();
        JSONNode::JSONObject::const_iterator mitr = mobject.begin();

        for(;itr != object.end(); ++itr,++mitr)
        {
            entries[itr->first] = MapNode();
            entries[itr->first].SetValue(itr->second,mitr->second,decodeString);
        }
    }
    else if(data_type == 0 && data.GetType() == JSONNode::JSONARRAY)
    {
        const JSONNode::JSONArray& array = data.GetArray();
        const JSONNode::JSONArray& marray = metadata.GetArray();
        char buffer[1024];

        for(size_t i = 0; i < array.size(); ++i) {
            sprintf(buffer, "%ld", i);
            entries[buffer] = MapNode();
            entries[buffer].SetValue(array[i], marray[i], decodeString);
        }
    }
    else
    {
        if(data_type == MapNodeType) {
            SetValue(data);
        }
        else {
            Variant::SetValue(data,metadata,decodeString);
        }
    }
}

void
MapNode::SetValue(const JSONNode* data, const JSONNode* metadata, bool decodeString)
{
    MapNode::SetValue(*data, *metadata, decodeString);
}

// ****************************************************************************
// Method: MapNode::operator ==
//
// Purpose: 
//   Compares 2 MapNode objects.
//
// Arguments:
//   obj  : The object to compare.
//
// Returns:    True if the objects are equal; false otherwise.
//
// Note:       
//
// Programmer: Brad Whitlock
// Creation:   Tue Jan  6 15:33:24 PST 2009
//
// Modifications:
//   
// ****************************************************************************

bool
MapNode::operator ==(const MapNode &obj) const
{
    if(Type() != obj.Type())
        return false;

    bool equal = false;
    if(Type() == EMPTY_TYPE)
    {
        // Compare sizes
        if(entries.size() != obj.entries.size())
            return false;

        // Compare keys and values
        std::map<std::string,MapNode>::const_iterator it1 = entries.begin();
        std::map<std::string,MapNode>::const_iterator it2 = obj.entries.begin();
        for(; it1 != entries.end(); ++it1, ++it2)
        {
            // Compare keys. If they don't sort the same in the map then the
            // maps are different.
            if(it1->first != it2->first)
                return false;
        
            // recurse
            if(!(it1->second == it2->second))
                return false;
        }

        equal = true;
    }
    else
    {
        equal = Variant::operator==(obj);
    }

    return equal;
}

// ****************************************************************************
// Method: MapNode::CalculateMessageSize
//
// Purpose: 
//   Calculates the size of the message needed to store the serialized MapNode.
//
// Arguments:
//   conn : The connection doing the writing.
//
// Returns:    The message size.
//
// Note:       
//
// Programmer: Brad Whitlock
// Creation:   Tue Jan  6 15:35:48 PST 2009
//
// Modifications:
//   
// ****************************************************************************
int
MapNode::CalculateMessageSize(Connection &conn) const
{
    return CalculateMessageSize(&conn);
}

int
MapNode::CalculateMessageSize(Connection *conn) const
{
    int messageSize = conn->IntSize(conn->DEST);

    if(Type() == EMPTY_TYPE)
    {
        messageSize += conn->IntSize(conn->DEST);

        map<string,MapNode>::const_iterator itr;
        for(itr = entries.begin(); itr != entries.end(); ++itr)
        {
            messageSize += conn->CharSize(conn->DEST) * (itr->first.size() + 1);
            messageSize += itr->second.CalculateMessageSize(conn);
        }
    }
    else
        messageSize += Variant::CalculateMessageSize(conn);

    return messageSize;
}

// ****************************************************************************
// Method: MapNode::Write
//
// Purpose: 
//   Write a MapNode to a Connection.
//
// Arguments:
//   conn : The connection to use for writing.
//
// Programmer: Brad Whitlock
// Creation:   Tue Jan  6 15:36:19 PST 2009
//
// Modifications:
//   
// ****************************************************************************
void
MapNode::Write(Connection &conn) const
{
    Write(&conn);
}

void
MapNode::Write(Connection *conn) const
{
    conn->WriteInt(Type());

    if(Type() == EMPTY_TYPE)
    {
        // Write the number of entries
        conn->WriteInt((int)entries.size());

        map<string,MapNode>::const_iterator itr;
        for(itr = entries.begin(); itr != entries.end(); ++itr)
        {
            // Write the name of the item
            conn->WriteString(itr->first);

            // Write the item data.
            itr->second.Write(conn);
        }
    }
    else
    {
        Variant::Write(conn);
    }
}

// ****************************************************************************
// Method: MapNode::Read
//
// Purpose: 
//   Reads the MapNode from the connection.
//
// Arguments:
//   conn : The connection to use for reading,.
//
// Programmer: Brad Whitlock
// Creation:   Tue Jan  6 15:36:46 PST 2009
//
// Modifications:
//   
// ****************************************************************************

void
MapNode::Read(Connection &conn)
{
    entries.clear();

    // Read the data type
    int dt;
    conn.ReadInt(&dt);
    Init(dt);

    if(dt == EMPTY_TYPE)
    {
        int nEntries = 0;
        conn.ReadInt(&nEntries);

        for(int i = 0; i < nEntries; ++i)
        {
            // Read the name of the item
            string name;
            conn.ReadString(name);

            // Implicitly create the item and read its data.
            entries[name].Read(conn);
        }
    }
    else
    {
        Variant::Read(conn);
    }
}

// ****************************************************************************
// Method: MapNode::Merge
//
// Purpose: 
//   This method merges 2 MapNodes together so that missing fields from one
//   MapNode will get added to this MapNode.
//
// Arguments:
//   obj  : The MapNode to add to this MapNode.
//
// Returns:    
//
// Note:       
//
// Programmer: Brad Whitlock
// Creation:   Fri Jan 16 12:01:50 PST 2009
//
// Modifications:
//   
// ****************************************************************************

void
MapNode::Merge(const MapNode &obj)
{
    if(this->operator ==(obj))
        return;

    if(Type() == EMPTY_TYPE)
    { 
        if(obj.Type() == EMPTY_TYPE)
        {
            map<string,MapNode>::const_iterator itr, itr2;
            for(itr = obj.entries.begin(); itr != obj.entries.end(); ++itr)
            {
                itr2 = entries.find(itr->first);
                if(itr2 == entries.end())
                {
                    // This object does not have the key we looked for so
                    // let's add the missing key/value pair.
                    entries[itr->first] = itr->second;
                }
                else
                {
                    entries[itr->first].Merge(itr->second);
                }
            }
        }
        else
        {
            entries[TypeName()] = obj;
        }
    }
    else
    {
        if(obj.Type() == EMPTY_TYPE)
        {
            // This is a variant and that is a mapnode
            MapNode obj2(obj);
            obj2.Merge(*this);
            *this = obj2;
        }
        else
        {
            // Both are variants. Combine into a MapNode
            MapNode merged;
            if(Type() == obj.Type())
            {
                merged[TypeName() + "0"] = *this;
                merged[obj.TypeName() + "1"] = obj;
            }
            else
            {
                merged[TypeName()] = *this;
                merged[obj.TypeName()] = obj;
            }
            *this = merged;
        }
    }
}

// ****************************************************************************
// Method: MapNode::Remove
//
// Purpose: 
//   This method removes the entry for the given key.
//
// Arguments:
//   key  : The entry to remove.
//
// Programmer: Kathleen Biagas
// Creation:   January 12, 2012
//
// Modifications:
//   
// ****************************************************************************

void
MapNode::RemoveEntry(const std::string &key)
{
    entries.erase(key);
}