<?php

// Set error reporting to only show errors and parse errors
error_reporting(E_ERROR | E_PARSE);

// Set the time limit for script execution to unlimited
set_time_limit(-1);

// Set the maximum input time to unlimited
ini_set('max_input_time', '-1');

// Set the maximum execution time to unlimited
ini_set('max_execution_time', '0');

// Start the session
session_start();

// Start output buffering
ob_start();

// Define the constant 'DB_FILE' with the value of 'modname' session variable followed by ".db"
define('DB_FILE', $_SESSION['modname'] . ".db");

// Include the configuration file
require_once './config.php';

// Include the PDO wrapper file
require_once './_pdo.php';

// Include the required class files
require_once "./src/D2Functions.php";
require_once "./src/D2Database.php";
require_once './src/D2Files.php';
require_once './src/D2TxtParser.php';
require_once './src/D2ItemDesc.php';
require_once './src/D2Char.php';
require_once './src/D2CharStructureData.php';
require_once './src/D2ByteReader.php';

// Create an instance of D2CharStructureData class
$csData = new D2CharStructureData();

$g = $_GET;
$cmd = $g['cmd'];

// Get the file path from the POST data and replace backslashes /
$filePath = $g['filePath'];
$filePath = str_replace("\\", "\\\\", $filePath);

// Handle the WP check/uncheck
if ($cmd == "wp") {
    $diff = $g['diff'];

    if ($diff == "Norm") {
        $offset = 643;
    }

    if ($diff == "NM") {
        $offset = 667;
    }

    if ($diff == "Hell") {
        $offset = 691;
    }

    /*
      array (size=5)
      'cmd' => string 'wp' (length=2)
      'name' => string '1' (length=1)
      'value' => string '1' (length=1)
      'filePath' => string 'D:\\Diablo II\\MODS\\ironman-dev\\save\\Sorc.d2s' (length=48)
      'diff' => string 'Norm' (length=4)
     */

    $fileContents = file_get_contents($filePath); // Read the contents of the file
    $ByteReader = new D2ByteReader($fileContents); // Create a new instance of D2ByteReader with the file data
    $fileData = $ByteReader->getData(); // Get the data from the ByteReader instance      

    $wpBytes = $ByteReader->read($offset, 5, 1);
    $wpBytesToBits = $ByteReader->toBits($wpBytes);

    $BitReader = new D2BitReader($wpBytesToBits);
    $BitReader->setBit($g['name'], $g['value']);

    $newBits = $BitReader->getBits();
    $newBitsToBytes = $ByteReader->bitsToHexString($newBits);

    $ByteReader->writeBytes($offset, $newBitsToBytes);
    $newFileData = $ByteReader->getData();
    $fileSaved = file_put_contents($filePath, $newFileData);
    $checksum = (shell_exec("bin\d2scs.exe \"$filePath\""));

    if ($fileSaved) {
        echo "Success";
    } else {
        echo "Fail";
    }
}


/*
 * array (size=5)
    'cmd' => string 'q' (length=1)
    'name' => string 'Sisters_Burial_Grounds' (length=29)
    'value' => string '1' (length=1)
    'filePath' => string 'D:\\Diablo II\\MODS\\ironman-dev\\save\\Sorc.d2s' (length=48)
    'diff' => string 'Norm' (length=4)

  At each quest offset, read a short, 2 bytes.
    347 => 'Den_Of_Evil',
    349 => 'Sisters_Burial_Grounds',
    351 => 'Tools_Of_The_Trade',
    353 => 'The_Search_For_Cain',
    355 => 'The_Forgotten_Tower',
    357 => 'Sisters_To_The_Slaughter',

  Each short is 16 bytes.
 * 
 * 0xFEFF = 11111110 11111111
 * Short #0	Den of Evil	Bit 4 is set when you enter the Den.

 */

if ($cmd == "q") {
    $diff = $g['diff'];
    if ($diff == "Norm") {
        $qArray = array_flip($csData->qNorm);
        $questOffset = $qArray[$g['name']];
    }

    if ($diff == "NM") {
        $qArray = array_flip($csData->qNM);
        $questOffset = $qArray[$g['name']];
    }

    if ($diff == "Hell") {
        $qArray = array_flip($csData->qHell);
        $questOffset = $qArray[$g['name']];
    }

    // Open the file in binary mode for both reading and writing
    $fp = fopen($filePath, "rb+");

    if ($g['value']) {
        // Set the file pointer position to the quest offset
        fseek($fp, $questOffset);

        // Write the byte value 0xFE at the current position
        fwrite($fp, pack('C', 0xFE));

        // Move the file pointer to the next position
        fseek($fp, $questOffset + 1);

        // Write the byte value 0xFF at the current position
        fwrite($fp, pack('C', 0xFF));
        
        echo "Quest Just Finished, Collect Reward!";
    } else {
        // Set the file pointer position to the quest offset
        fseek($fp, $questOffset);

        // Write the byte value 0xFE at the current position
        fwrite($fp, pack('C', 0x00));

        // Move the file pointer to the next position
        fseek($fp, $questOffset + 1);

        // Write the byte value 0xFF at the current position
        fwrite($fp, pack('C', 0x00));
        
        echo "Quest Not Started Yet!";
    }

    $checksum = (shell_exec("bin\d2scs.exe \"$filePath\""));
    fclose($fp);
}