<?php

require_once 'D2BitReader.php';
require_once 'D2ItemStructureData.php';

/**
 *
 */
class D2Item {

    /**
     * @var null
     */
    private $bits = null;
    /**
     * @var null
     */
    public $iData = null;

    /**
     * @param $bits
     */
    public function __construct($bits) {
        if ($bits == '')
            return false;
        $this->bits = $bits;
        return $this->parseItem();
    }

    /* set $this->iData to array of item details
     *
     * @return array of item details
     */

    /**
     * @return null
     */
    private function parseItem() {
        $b = new D2BitReader($this->bits);

        $b->skip(16); // Skip JM
        $b->skip(4); // skip unknown 4 bytes
        $this->iData['identified'] = $b->read(1); // bit 20, identified
        $b->skip(6); // skip unknown 6 bytes
        $this->iData['socketed'] = $b->read(1); // bit 27, socketed
        $b->skip(1);
        // This bit is set on items which you have picked up since the last time the game was saved.
        $this->iData['pickedUpSinceLastSave'] = $b->read(1); // bit 29
        $b->skip(2);
        $this->iData['ear'] = $b->read(1); // bit 32 bool
        $this->iData['startingItem'] = $b->read(1); // bit 33 bool
        $b->skip(3);
        $this->iData['compact'] = $b->read(1); // bit 37 compact
        $this->iData['ethereal'] = $b->read(1); // bit 38 ethereal
        $b->skip(1); // unknown, seems always 1
        $this->iData['personalized'] = $b->read(1); // bit 40 Item has been personalized (by Anya in Act V)
        $b->skip(1);
        $this->iData['runeword'] = $b->read(1); // bit 42 the item has been given a Rune Word.
        $b->skip(15); // unknown; some of these bits may be set
        
        
        // item location
        $location = bindec($b->readr(3)); // bit 58 parent Item location.
        $body = bindec($b->readr(4)); // bit 61 If the item is equipped
        $col = bindec($b->readr(4)); // bit 65 Column number of the left corner of the item
        $row = bindec($b->readr(4)); // bit 69 Row number of the top of the item, counting from 0. 
        $_stored = bindec($b->readr(3)); // bit 73
        
        
        // weird behavior/bug
        // if item is in a container, bodypart will be NULL
        // if item is on bodypart, container will be NULL
        switch ($location) {
            case D2ItemLocation::STORED:
                switch ($_stored) {
                    case D2ItemLocationStored::NONE:
                        $this->iData['container'] = ''; // item is not stored, check bit 58
                        break;
                    case D2ItemLocationStored::INVENTORY:
                        $this->iData['container'] = 'Inventory';
                        break;
                    case D2ItemLocationStored::CUBE:
                        $this->iData['container'] = 'Horadric Cube';
                        break;
                    case D2ItemLocationStored::STASH:
                        $this->iData['container'] = 'Stash';
                        break;
                    default: $this->iData['container'] = 'Unknown';
                        break;
                }
                break;
            case D2ItemLocation::EQUIPPED:
                switch ($body) {
                    case D2ItemLocationBody::HELMET: $this->iData['bodypart'] = 'Helmet';
                        break;
                    case D2ItemLocationBody::AMULET: $this->iData['bodypart'] = 'Amulet';
                        break;
                    case D2ItemLocationBody::ARMOR: $this->iData['bodypart'] = 'Armor';
                        break;
                    case D2ItemLocationBody::WEAPONR: $this->iData['bodypart'] = 'Weapon R';
                        break;
                    case D2ItemLocationBody::WEAPONL: $this->iData['bodypart'] = 'Weapon L';
                        break;
                    case D2ItemLocationBody::RINGR: $this->iData['bodypart'] = 'Ring R';
                        break;
                    case D2ItemLocationBody::RINGL: $this->iData['bodypart'] = 'Ring L';
                        break;
                    case D2ItemLocationBody::BELT: $this->iData['bodypart'] = 'Belt';
                        break;
                    case D2ItemLocationBody::BOOTS: $this->iData['bodypart'] = 'Boots';
                        break;
                    case D2ItemLocationBody::GLOVES: $this->iData['bodypart'] = 'Gloves';
                        break;
                    case D2ItemLocationBody::WEAPONR2: $this->iData['bodypart'] = 'Weapon Alt R';
                        break;
                    case D2ItemLocationBody::WEAPONL2: $this->iData['bodypart'] = 'Weapon Alt L';
                        break;
                    default: $this->iData['bodypart'] = 'Unknown';
                        break;
                }
                break;
        }
        
        // if item is ear
        if ($this->iData['ear']){
            // set item code/basename
            $this->iData['itemCode'] = 'ear';
			$this->iData['basename'] = 'Ear';   
            // get ear class/level
            $eclass = bindec($b->readr(3)); // bit 76
            $elevel = bindec($b->readr(7)); // bit 79
            // get ear char's name                               
        }
                        
        // get item code
        $b->seek(76);
        $itemCode = '';
        foreach (str_split($b->read(32), 8) as $byte) {
            $itemCode .= chr(bindec(strrev($byte)));
        }
        $this->iData['itemCode'] = trim($itemCode);
        
        // get namestr
        $sql = "SELECT code,namestr FROM armor WHERE code='{$this->iData['itemCode']}'";
        $res = PDO_FetchAssoc($sql);
        if (empty($res)){
            $sql = "SELECT code,namestr FROM misc WHERE code='{$this->iData['itemCode']}'";
            $res = PDO_FetchAssoc($sql);
        }
        if (empty($res)){
            $sql = "SELECT code,namestr FROM weapons WHERE code='{$this->iData['itemCode']}'";
            $res = PDO_FetchAssoc($sql);
        }        
        
        $sql = "SELECT `String` FROM strings WHERE `Key`='{$res[$this->iData['itemCode']]}'";
        $res = PDO_FetchOne($sql);      
        $this->iData['basename'] = $res;
        
        return $this->iData;
    }

}