/*
 *  Aethyra
 *  Copyright (C) 2004  The Mana World Development Team
 *
 *  This file is part of Aethyra based on original code
 *  from The Mana World.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <cassert>

#include <libxml/tree.h>

#include "itemdb.h"

#include "../log.h"

#include "../utils/dtor.h"
#include "../utils/gettext.h"
#include "../utils/trim.h"
#include "../utils/xml.h"

namespace
{
    ItemDB::ItemInfos mItemInfos;
    ItemDB::NamedItemInfos mNamedItemInfos;
    ItemInfo *mUnknown;
    bool mLoaded = false;
}

// Forward declarations
static void loadSpriteRef(ItemInfo *itemInfo, xmlNodePtr node);
static void loadSoundRef(ItemInfo *itemInfo, xmlNodePtr node);

void ItemDB::load()
{
    if (mLoaded)
        return;

    logger->log("Initializing item database...");

    mUnknown = new ItemInfo();
    mUnknown->setName(_("Unknown item"));
    mUnknown->setImageName("");
    mUnknown->setSprite("error.xml", GENDER_MALE);
    mUnknown->setSprite("error.xml", GENDER_FEMALE);

    XML::Document doc(_("items.xml"));
    xmlNodePtr rootNode = doc.rootNode();

    if (!rootNode || !xmlStrEqual(rootNode->name, BAD_CAST "items"))
    {
        logger->error("ItemDB: Error while loading items.xml!");
    }

    for_each_xml_child_node(node, rootNode)
    {
        if (!xmlStrEqual(node->name, BAD_CAST "item"))
            continue;

        int id = XML::getProperty(node, "id", 0);

        if (id == 0)
        {
            logger->log("ItemDB: Invalid or missing item ID in items.xml!");
            continue;
        }
        else if (mItemInfos.find(id) != mItemInfos.end())
        {
            logger->log("ItemDB: Redefinition of item ID %d", id);
        }

        std::string type = XML::getProperty(node, "type", "other");
        int weight = XML::getProperty(node, "weight", 0);
        int view = XML::getProperty(node, "view", 0);

        std::string name = XML::getProperty(node, "name", "");
        std::string image = XML::getProperty(node, "image", "");
        std::string description = XML::getProperty(node, "description", "");
        std::string effect = XML::getProperty(node, "effect", "");
        int weaponType = XML::getProperty(node, "weapon_type", 0);

        if (id)
        {
            ItemInfo *itemInfo = new ItemInfo;
            itemInfo->setId(id);
            itemInfo->setImageName(image);
            itemInfo->setName(name.empty() ? _("Unnamed") : name);
            itemInfo->setDescription(description);
            itemInfo->setEffect(effect);
            itemInfo->setType(type);
            itemInfo->setView(view);
            itemInfo->setWeight(weight);
            itemInfo->setWeaponType(weaponType);

            for_each_xml_child_node(itemChild, node)
            {
                if (xmlStrEqual(itemChild->name, BAD_CAST "sprite"))
                {
                    loadSpriteRef(itemInfo, itemChild);
                }
                else if (xmlStrEqual(itemChild->name, BAD_CAST "sound"))
                {
                    loadSoundRef(itemInfo, itemChild);
                }
            }

            mItemInfos[id] = itemInfo;
            if (!name.empty())
            {
                NamedItemInfoIterator itr = mNamedItemInfos.find(name);
                if (itr == mNamedItemInfos.end())
                {
                    std::string temp = name;
                    trim(temp);

                    for (unsigned int i = 0; i < temp.size(); i++)
                    {
                        temp[i] = (char) tolower(temp[i]);
                    }

                    mNamedItemInfos[temp] = itemInfo;
                }
                else
                {
                    logger->log("ItemDB: Duplicate name of item found item %d",
                                   id);
                }
            }
        }

#define CHECK_PARAM(param, error_value) \
        if (param == error_value) \
            logger->log("ItemDB: Missing " #param " attribute for item %i!",id)

        CHECK_PARAM(name, "");
        CHECK_PARAM(image, "");
        CHECK_PARAM(description, "");
        // CHECK_PARAM(effect, "");
        // CHECK_PARAM(type, 0);
        // CHECK_PARAM(weight, 0);
        // CHECK_PARAM(slot, 0);

#undef CHECK_PARAM
    }

    mLoaded = true;
}

void ItemDB::unload()
{
    logger->log("Unloading item database...");

    delete mUnknown;
    mUnknown = NULL;

    delete_all(mItemInfos);
    mItemInfos.clear();
    mLoaded = false;
}

const ItemInfo& ItemDB::get(int id)
{
    assert(mLoaded);

    ItemInfoIterator i = mItemInfos.find(id);

    if (i == mItemInfos.end())
    {
        logger->log("ItemDB: Error, unknown item ID# %d", id);
        return *mUnknown;
    }
    else
    {
        return *(i->second);
    }
}

const ItemInfo& ItemDB::get(const std::string &name)
{
    assert(mLoaded && !name.empty());

    NamedItemInfoIterator i = mNamedItemInfos.find(name);

    if (i == mNamedItemInfos.end())
    {
        logger->log("ItemDB: Error, unknown item name %s", name.c_str());
        return *mUnknown;
    }
    else
    {
        return *(i->second);
    }
}

void loadSpriteRef(ItemInfo *itemInfo, xmlNodePtr node)
{
    std::string gender = XML::getProperty(node, "gender", "unisex");
    std::string filename = (const char*) node->xmlChildrenNode->content;

    if (gender == "male" || gender == "unisex")
    {
        itemInfo->setSprite(filename, GENDER_MALE);
    }
    if (gender == "female" || gender == "unisex")
    {
        itemInfo->setSprite(filename, GENDER_FEMALE);
    }
}

void loadSoundRef(ItemInfo *itemInfo, xmlNodePtr node)
{
    std::string event = XML::getProperty(node, "event", "");
    std::string filename = (const char*) node->xmlChildrenNode->content;

    if (event == "hit")
    {
        itemInfo->addSound(EQUIP_EVENT_HIT, filename);
    }
    else if (event == "strike")
    {
        itemInfo->addSound(EQUIP_EVENT_STRIKE, filename);
    }
    else
    {
        logger->log("ItemDB: Ignoring unknown sound event '%s'",
                event.c_str());
    }
}