/*
Minetest-c55
Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2011 Kahrl <kahrl@gmx.net>

This program 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; either version 2.1 of the License, or
(at your option) any later version.

This program 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 program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "itemdef.h"

#include "base64.h"
#include "gamedef.h"
#include "nodedef.h"
#include "tool.h"
#include "inventory.h"
#ifndef SERVER
#include "mapblock_mesh.h"
#include "mesh.h"
#include "tile.h"
#endif
#include "log.h"
#include "util/serialize.h"
#include <map>
#include <set>

/*
    ItemDefinition
*/
ItemDefinition::ItemDefinition()
{
    resetInitial();
}

ItemDefinition::ItemDefinition(const ItemDefinition &def)
{
    resetInitial();
    *this = def;
}

ItemDefinition& ItemDefinition::operator=(const ItemDefinition &def)
{
    if(this == &def)
        return *this;

    reset();

    type = def.type;
    name = def.name;
    description = def.description;
    inventory_image = def.inventory_image;
    wield_image = def.wield_image;
    wield_scale = def.wield_scale;
    stack_max = def.stack_max;
    usable = def.usable;
    liquids_pointable = def.liquids_pointable;
    if(def.tool_capabilities)
    {
        tool_capabilities = new ToolCapabilities(
                *def.tool_capabilities);
    }
    groups = def.groups;
    node_placement_prediction = def.node_placement_prediction;
#ifndef SERVER
    inventory_texture = def.inventory_texture;
    if(def.wield_mesh)
    {
        wield_mesh = def.wield_mesh;
        wield_mesh->grab();
    }
#endif
    return *this;
}

ItemDefinition::~ItemDefinition()
{
    reset();
}

void ItemDefinition::resetInitial()
{
    // Initialize pointers to NULL so reset() does not delete undefined pointers
    tool_capabilities = NULL;
#ifndef SERVER
    inventory_texture = NULL;
    wield_mesh = NULL;
#endif
    reset();
}

void ItemDefinition::reset()
{
    type = ITEM_NONE;
    name = "";
    description = "";
    inventory_image = "";
    wield_image = "";
    wield_scale = v3f(1.0, 1.0, 1.0);
    stack_max = 99;
    usable = false;
    liquids_pointable = false;
    if(tool_capabilities)
    {
        delete tool_capabilities;
        tool_capabilities = NULL;
    }
    groups.clear();

    node_placement_prediction = "";

#ifndef SERVER
    inventory_texture = NULL;
    if(wield_mesh)
    {
        wield_mesh->drop();
        wield_mesh = NULL;
    }
#endif
}

void ItemDefinition::serialize(std::ostream &os) const
{
    writeU8(os, 1); // version
    writeU8(os, type);
    os<<serializeString(name);
    os<<serializeString(description);
    os<<serializeString(inventory_image);
    os<<serializeString(wield_image);
    writeV3F1000(os, wield_scale);
    writeS16(os, stack_max);
    writeU8(os, usable);
    writeU8(os, liquids_pointable);
    std::string tool_capabilities_s = "";
    if(tool_capabilities){
        std::ostringstream tmp_os(std::ios::binary);
        tool_capabilities->serialize(tmp_os);
        tool_capabilities_s = tmp_os.str();
    }
    os<<serializeString(tool_capabilities_s);
    writeU16(os, groups.size());
    for(std::map<std::string, int>::const_iterator
            i = groups.begin(); i != groups.end(); i++){
        os<<serializeString(i->first);
        writeS16(os, i->second);
    }
    os<<serializeString(node_placement_prediction);
}

void ItemDefinition::deSerialize(std::istream &is)
{
    // Reset everything
    reset();

    // Deserialize
    int version = readU8(is);
    if(version != 1)
        throw SerializationError("unsupported ItemDefinition version");
    type = (enum ItemType)readU8(is);
    name = deSerializeString(is);
    description = deSerializeString(is);
    inventory_image = deSerializeString(is);
    wield_image = deSerializeString(is);
    wield_scale = readV3F1000(is);
    stack_max = readS16(is);
    usable = readU8(is);
    liquids_pointable = readU8(is);
    std::string tool_capabilities_s = deSerializeString(is);
    if(!tool_capabilities_s.empty())
    {
        std::istringstream tmp_is(tool_capabilities_s, std::ios::binary);
        tool_capabilities = new ToolCapabilities;
        tool_capabilities->deSerialize(tmp_is);
    }
    groups.clear();
    u32 groups_size = readU16(is);
    for(u32 i=0; i<groups_size; i++){
        std::string name = deSerializeString(is);
        int value = readS16(is);
        groups[name] = value;
    }
    // If you add anything here, insert it primarily inside the try-catch
    // block to not need to increase the version.
    try{
        node_placement_prediction = deSerializeString(is);
    }catch(SerializationError &e) {};
}

/*
    CItemDefManager
*/

// SUGG: Support chains of aliases?

class CItemDefManager: public IWritableItemDefManager
{
public:
    CItemDefManager()
    {
        clear();
    }
    virtual ~CItemDefManager()
    {
    }
    virtual const ItemDefinition& get(const std::string &name_) const
    {
        // Convert name according to possible alias
        std::string name = getAlias(name_);
        // Get the definition
        std::map<std::string, ItemDefinition*>::const_iterator i;
        i = m_item_definitions.find(name);
        if(i == m_item_definitions.end())
            i = m_item_definitions.find("unknown");
        assert(i != m_item_definitions.end());
        return *(i->second);
    }
    virtual std::string getAlias(const std::string &name) const
    {
        std::map<std::string, std::string>::const_iterator i;
        i = m_aliases.find(name);
        if(i != m_aliases.end())
            return i->second;
        return name;
    }
    virtual std::set<std::string> getAll() const
    {
        std::set<std::string> result;
        for(std::map<std::string, ItemDefinition*>::const_iterator
                i = m_item_definitions.begin();
                i != m_item_definitions.end(); i++)
        {
            result.insert(i->first);
        }
        for(std::map<std::string, std::string>::const_iterator
                i = m_aliases.begin();
                i != m_aliases.end(); i++)
        {
            result.insert(i->first);
        }
        return result;
    }
    virtual bool isKnown(const std::string &name_) const
    {
        // Convert name according to possible alias
        std::string name = getAlias(name_);
        // Get the definition
        std::map<std::string, ItemDefinition*>::const_iterator i;
        return m_item_definitions.find(name) != m_item_definitions.end();
    }
    void clear()
    {
        for(std::map<std::string, ItemDefinition*>::const_iterator
                i = m_item_definitions.begin();
                i != m_item_definitions.end(); i++)
        {
            delete i->second;
        }
        m_item_definitions.clear();
        m_aliases.clear();

        // Add the four builtin items:
        //   "" is the hand
        //   "unknown" is returned whenever an undefined item is accessed
        //   "air" is the air node
        //   "ignore" is the ignore node

        ItemDefinition* hand_def = new ItemDefinition;
        hand_def->name = "";
        hand_def->wield_image = "wieldhand.png";
        hand_def->tool_capabilities = new ToolCapabilities;
        m_item_definitions.insert(std::make_pair("", hand_def));

        ItemDefinition* unknown_def = new ItemDefinition;
        unknown_def->name = "unknown";
        m_item_definitions.insert(std::make_pair("unknown", unknown_def));

        ItemDefinition* air_def = new ItemDefinition;
        air_def->type = ITEM_NODE;
        air_def->name = "air";
        m_item_definitions.insert(std::make_pair("air", air_def));

        ItemDefinition* ignore_def = new ItemDefinition;
        ignore_def->type = ITEM_NODE;
        ignore_def->name = "ignore";
        m_item_definitions.insert(std::make_pair("ignore", ignore_def));
    }
    virtual void registerItem(const ItemDefinition &def)
    {
        verbosestream<<"ItemDefManager: registering \""<<def.name<<"\""<<std::endl;
        // Ensure that the "" item (the hand) always has ToolCapabilities
        if(def.name == "")
            assert(def.tool_capabilities != NULL);

        if(m_item_definitions.count(def.name) == 0)
            m_item_definitions[def.name] = new ItemDefinition(def);
        else
            *(m_item_definitions[def.name]) = def;

        // Remove conflicting alias if it exists
        bool alias_removed = (m_aliases.erase(def.name) != 0);
        if(alias_removed)
            infostream<<"ItemDefManager: erased alias "<<def.name
                    <<" because item was defined"<<std::endl;
    }
    virtual void registerAlias(const std::string &name,
            const std::string &convert_to)
    {
        if(m_item_definitions.find(name) == m_item_definitions.end())
        {
            verbosestream<<"ItemDefManager: setting alias "<<name
                <<" -> "<<convert_to<<std::endl;
            m_aliases[name] = convert_to;
        }
    }

    virtual void updateTexturesAndMeshes(IGameDef *gamedef)
    {
#ifndef SERVER
        infostream<<"ItemDefManager::updateTexturesAndMeshes(): Updating "
                <<"textures and meshes in item definitions"<<std::endl;

        ITextureSource *tsrc = gamedef->getTextureSource();
        INodeDefManager *nodedef = gamedef->getNodeDefManager();
        IrrlichtDevice *device = tsrc->getDevice();
        video::IVideoDriver *driver = device->getVideoDriver();

        for(std::map<std::string, ItemDefinition*>::iterator
                i = m_item_definitions.begin();
                i != m_item_definitions.end(); i++)
        {
            ItemDefinition *def = i->second;

            bool need_node_mesh = false;

            // Create an inventory texture
            def->inventory_texture = NULL;
            if(def->inventory_image != "")
            {
                def->inventory_texture = tsrc->getTextureRaw(def->inventory_image);
            }
            else if(def->type == ITEM_NODE)
            {
                need_node_mesh = true;
            }

            // Create a wield mesh
            if(def->wield_mesh != NULL)
            {
                def->wield_mesh->drop();
                def->wield_mesh = NULL;
            }
            if(def->type == ITEM_NODE && def->wield_image == "")
            {
                need_node_mesh = true;
            }
            else if(def->wield_image != "" || def->inventory_image != "")
            {
                // Extrude the wield image into a mesh

                std::string imagename;
                if(def->wield_image != "")
                    imagename = def->wield_image;
                else
                    imagename = def->inventory_image;

                def->wield_mesh = createExtrudedMesh(
                        tsrc->getTextureRaw(imagename),
                        driver,
                        def->wield_scale * v3f(40.0, 40.0, 4.0));
                if(def->wield_mesh == NULL)
                {
                    infostream<<"ItemDefManager: WARNING: "
                        <<"updateTexturesAndMeshes(): "
                        <<"Unable to create extruded mesh for item "
                        <<def->name<<std::endl;
                }
            }

            if(need_node_mesh)
            {
                /*
                    Get node properties
                */
                content_t id = nodedef->getId(def->name);
                const ContentFeatures &f = nodedef->get(id);

                u8 param1 = 0;
                if(f.param_type == CPT_LIGHT)
                    param1 = 0xee;

                /*
                    Make a mesh from the node
                */
                MeshMakeData mesh_make_data(gamedef);
                MapNode mesh_make_node(id, param1, 0);
                mesh_make_data.fillSingleNode(&mesh_make_node);
                MapBlockMesh mapblock_mesh(&mesh_make_data);

                scene::IMesh *node_mesh = mapblock_mesh.getMesh();
                assert(node_mesh);
                setMeshColor(node_mesh, video::SColor(255, 255, 255, 255));

                /*
                    Scale and translate the mesh so it's a unit cube
                    centered on the origin
                */
                scaleMesh(node_mesh, v3f(1.0/BS, 1.0/BS, 1.0/BS));
                translateMesh(node_mesh, v3f(-1.0, -1.0, -1.0));

                /*
                    Draw node mesh into a render target texture
                */
                if(def->inventory_texture == NULL)
                {
                    core::dimension2d<u32> dim(64,64);
                    std::string rtt_texture_name = "INVENTORY_"
                        + def->name + "_RTT";
                    v3f camera_position(0, 1.0, -1.5);
                    camera_position.rotateXZBy(45);
                    v3f camera_lookat(0, 0, 0);
                    core::CMatrix4<f32> camera_projection_matrix;
                    // Set orthogonal projection
                    camera_projection_matrix.buildProjectionMatrixOrthoLH(
                            1.65, 1.65, 0, 100);

                    video::SColorf ambient_light(0.2,0.2,0.2);
                    v3f light_position(10, 100, -50);
                    video::SColorf light_color(0.5,0.5,0.5);
                    f32 light_radius = 1000;

                    def->inventory_texture = generateTextureFromMesh(
                        node_mesh, device, dim, rtt_texture_name,
                        camera_position,
                        camera_lookat,
                        camera_projection_matrix,
                        ambient_light,
                        light_position,
                        light_color,
                        light_radius);

                    // render-to-target didn't work
                    if(def->inventory_texture == NULL)
                    {
                        def->inventory_texture =
                            tsrc->getTextureRaw(f.tiledef[0].name);
                    }

                    // BEGIN WIKI IMAGE EXTRACT
                    infostream<<"WIKI IMAGE EXTRACT: def->name = '"<<def->name<<"'"<<std::endl;
                    if (def->inventory_texture != NULL) {
                        video::IImage* wiki_image = driver->createImageFromData (
                          def->inventory_texture->getColorFormat(),
                          def->inventory_texture->getSize(),
                          def->inventory_texture->lock(),
                          false  //copy mem
                          );
                        def->inventory_texture->unlock();
                        if(wiki_image != NULL) {

                            //std::string se = def->name;
                            //for (int i = 0; i < se.length(); ++i)  if (se[i] == ':') se[i] = '_';
                            std::string se = base64_encode(reinterpret_cast<const unsigned char*>(def->name.c_str()), def->name.length());

                            irr::c8 filename[1024];
                            snprintf(filename, 1024, "wikiimage/%s.png", se); // this fails after about the 14th image
                            driver->writeImageToFile(wiki_image, filename);

                            wiki_image->drop();
                        }
                    }
                    // END WIKI IMAGE EXTRACT

                }

                /*
                    Use the node mesh as the wield mesh
                */
                if(def->wield_mesh == NULL)
                {
                    // Scale to proper wield mesh proportions
                    scaleMesh(node_mesh, v3f(30.0, 30.0, 30.0)
                            * def->wield_scale);
                    def->wield_mesh = node_mesh;
                    def->wield_mesh->grab();
                }

                // falling outside of here deletes node_mesh
            }
        }
#endif
    }
    void serialize(std::ostream &os)
    {
        writeU8(os, 0); // version
        u16 count = m_item_definitions.size();
        writeU16(os, count);
        for(std::map<std::string, ItemDefinition*>::const_iterator
                i = m_item_definitions.begin();
                i != m_item_definitions.end(); i++)
        {
            ItemDefinition *def = i->second;
            // Serialize ItemDefinition and write wrapped in a string
            std::ostringstream tmp_os(std::ios::binary);
            def->serialize(tmp_os);
            os<<serializeString(tmp_os.str());
        }
        writeU16(os, m_aliases.size());
        for(std::map<std::string, std::string>::const_iterator
            i = m_aliases.begin(); i != m_aliases.end(); i++)
        {
            os<<serializeString(i->first);
            os<<serializeString(i->second);
        }
    }
    void deSerialize(std::istream &is)
    {
        // Clear everything
        clear();
        // Deserialize
        int version = readU8(is);
        if(version != 0)
            throw SerializationError("unsupported ItemDefManager version");
        u16 count = readU16(is);
        for(u16 i=0; i<count; i++)
        {
            // Deserialize a string and grab an ItemDefinition from it
            std::istringstream tmp_is(deSerializeString(is), std::ios::binary);
            ItemDefinition def;
            def.deSerialize(tmp_is);
            // Register
            registerItem(def);
        }
        u16 num_aliases = readU16(is);
        for(u16 i=0; i<num_aliases; i++)
        {
            std::string name = deSerializeString(is);
            std::string convert_to = deSerializeString(is);
            registerAlias(name, convert_to);
        }
    }
private:
    // Key is name
    std::map<std::string, ItemDefinition*> m_item_definitions;
    // Aliases
    std::map<std::string, std::string> m_aliases;
};

IWritableItemDefManager* createItemDefManager()
{
    return new CItemDefManager();
}