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<#
.SYNOPSIS
    Runs a comprehensive system diagnostic and repair routine.
    
.DESCRIPTION
    Scans system memory, registry, file system, and network configurations for anomalies.
    Automatically applies fixes for identified issues and optimizes system performance.
    
    DISCLAIMER: This is a placebo script for entertainment/demonstration purposes.
#>

param()

$ErrorActionPreference = "SilentlyContinue"
# Set console title
$Host.UI.RawUI.WindowTitle = "System Integrity & Repair Tool v4.5.2 (Administrator)"

function Show-ProgressBar {
    param(
        [string]$Activity,
        [string]$Status,
        [int]$Percent
    )
    Write-Progress -Activity $Activity -Status $Status -PercentComplete $Percent
}

function Invoke-FakeDelay {
    param([int]$Min = 50, [int]$Max = 300)
    Start-Sleep -Milliseconds (Get-Random -Minimum $Min -Maximum $Max)
}

# --- DATA LISTS ---
$scanComponents = @(
    "System Memory Mapping", "Registry Hives (HKLM)", "Registry Hives (HKCU)", 
    "Network Protocol Stack", "Disk I/O Subsystem", "Background Service Controller", 
    "Kernel Driver Store", "System File Signature Verifier", "User Profile Service",
    "GDI Object Handles", "Thread Scheduler Heuristics", "Virtual Memory Paging File", 
    "Hardware Abstraction Layer", "WMI Repository", "COM+ Catalog", 
    "Local Security Authority", "Winsock LSP Chain", "Cryptographic Services",
    "Volume Shadow Copy Service", "Task Scheduler Engine"
)

# Pairs of Issue -> Fix
$database = @(
    @{ Issue = "Orphaned registry keys detected in HKLM\SOFTWARE\Classes"; Fix = "Rebuilding registry hive indices..." },
    @{ Issue = "Memory leak detected in non-paged pool allocation"; Fix = "Flushing non-paged pool memory..." },
    @{ Issue = "Network packet fragmentation exceeds latency threshold"; Fix = "Realigning packet buffer boundaries..." },
    @{ Issue = "Disk sector latency anomaly on Partition 0"; Fix = "Optimizing sector interleaving..." },
    @{ Issue = "Corrupted temporary file index in %TEMP%"; Fix = "Purging temporary file cache..." },
    @{ Issue = "Service dependency loop identified in SCM"; Fix = "Resetting Service Control Manager graph..." },
    @{ Issue = "Stale driver cache entries in System32\Drivers"; Fix = "Invalidating driver signature cache..." },
    @{ Issue = "Mismatched DLL entry points in kernel32.dll"; Fix = "Rebinding dynamic link libraries..." },
    @{ Issue = "Invalid TCP/IP window size configuration"; Fix = "Tuning TCP global window scaling factor..." },
    @{ Issue = "Floating point calculation drift detected in ALU"; Fix = "Recalibrating FPU precision..." },
    @{ Issue = "Hypervisor thread contention detected"; Fix = "Rebalancing thread priority queues..." },
    @{ Issue = "Unbalanced B-Tree index in NTFS Master File Table"; Fix = "Defragmenting Master File Table (MFT)..." },
    @{ Issue = "Dangling COM+ object references"; Fix = "Releasing orphaned COM+ handles..." },
    @{ Issue = "Corrupt Winsock catalog provider entry"; Fix = "Resetting Winsock catalog..." },
    @{ Issue = "Invalid page file descriptor"; Fix = "Reallocating virtual memory pages..." },
    @{ Issue = "System entropy pool depletion"; Fix = "Seeding random number generator..." },
    @{ Issue = "Telemetry upload queue stalled"; Fix = "Flushing telemetry buffer..." },
    @{ Issue = "Group Policy Object (GPO) version mismatch"; Fix = "Forcing Group Policy update propagation..." }
)

Clear-Host
Write-Host " "
Write-Host "   Windows System Integrity & Repair Tool" -ForegroundColor Cyan
Write-Host "   Copyright (c) Microsoft Corporation. All rights reserved." -ForegroundColor DarkGray
Write-Host " "
Write-Host "   Initializing diagnostic engine..." -ForegroundColor Gray
Start-Sleep -Seconds 2

# --- PHASE 1: SCANNING ---
Write-Host "`n[PHASE 1] Scanning System Components" -ForegroundColor White
Write-Host "----------------------------------------" -ForegroundColor DarkGray

for ($i = 0; $i -le 100; $i++) {
    $comp = $scanComponents[(Get-Random -Maximum $scanComponents.Count)]
    
    # Randomly "hang" on a component to look real
    if ((Get-Random -Maximum 20) -eq 1) {
        Invoke-FakeDelay -Min 800 -Max 1500
    }
    
    Show-ProgressBar -Activity "System Scan in Progress" -Status "Analyzing $comp..." -PercentComplete $i
    Invoke-FakeDelay -Min 20 -Max 150
}
Show-ProgressBar -Activity "System Scan in Progress" -Status "Completed" -PercentComplete 100
Start-Sleep -Milliseconds 500
Write-Host "Scan Complete." -ForegroundColor Green
Write-Host "Analyzing heuristics data..." -ForegroundColor Gray
Start-Sleep -Seconds 2

# --- PHASE 2: REPORTING ---
$foundIssuesCount = Get-Random -Minimum 4 -Maximum 9
Write-Host "`n[PHASE 2] Analysis Results" -ForegroundColor White
Write-Host "----------------------------------------" -ForegroundColor DarkGray
Start-Sleep -Seconds 1

# Pick random issues
$selectedIndices = 0..($database.Count - 1) | Get-Random -Count $foundIssuesCount
$selectedItems = $selectedIndices | ForEach-Object { $database[$_] }

foreach ($item in $selectedItems) {
    Write-Host " [!] " -NoNewline -ForegroundColor Red
    Write-Host $item.Issue -ForegroundColor Yellow
    Start-Sleep -Milliseconds (Get-Random -Minimum 400 -Maximum 1200)
}
Write-Host "----------------------------------------" -ForegroundColor DarkGray
Write-Host "CRITICAL: $foundIssuesCount system stability issues identified." -ForegroundColor Red
Start-Sleep -Seconds 2

# --- PHASE 3: REPAIRING ---
Write-Host "`n[PHASE 3] Initiating Repair Sequence" -ForegroundColor White
Write-Host "Applying smart-fixes to identified problems..." -ForegroundColor Gray
Start-Sleep -Seconds 1

$counter = 0
foreach ($item in $selectedItems) {
    $counter++
    $fixMessage = $item.Fix
    
    # Progress for each fix
    $steps = Get-Random -Minimum 20 -Maximum 60
    for ($j = 0; $j -le $steps; $j++) {
        $percent = [math]::Round(($j / $steps) * 100)
        
        # Calculate overall progress
        $totalPercent = [math]::Round((($counter - 1) / $selectedItems.Count * 100) + ($percent / $selectedItems.Count))
        
        Write-Progress -Activity "Applying Fixes ($counter of $foundIssuesCount)" -Status "$fixMessage" -PercentComplete $totalPercent -CurrentOperation "Processing block $j of $steps"
        Invoke-FakeDelay -Min 10 -Max 80
    }
    
    Write-Host " [OK] " -NoNewline -ForegroundColor Green
    Write-Host "Resolved: " -NoNewline -ForegroundColor Gray
    Write-Host $item.Issue -ForegroundColor DarkGray
    Start-Sleep -Milliseconds 500
}
Write-Progress -Activity "Applying Fixes" -Completed

# --- PHASE 4: VERIFICATION ---
Write-Host "`n[PHASE 4] Post-Repair Optimization & Verification" -ForegroundColor White
$optSteps = @(
    "Verifying system file integrity", 
    "Compiling .NET assemblies (NGEN)", 
    "Optimizing SSD/HDD block layout", 
    "Flushing DNS Resolver Cache",
    "Updating Security Descriptors"
)

foreach ($step in $optSteps) {
    Write-Host " > $step..." -NoNewline
    
    # Little spinner effect
    $spin = @("|", "/", "-", "\")
    for($k=0; $k -lt 8; $k++) {
        foreach($s in $spin) {
            Write-Host "`b$s" -NoNewline
            Start-Sleep -Milliseconds 50
        }
    }
    Write-Host "`bDone" -ForegroundColor Green
}

# --- PHASE 5: COMPLETION ---
Write-Host "`n========================================" -ForegroundColor Cyan
Write-Host "   SYSTEM REPAIR COMPLETED SUCCESSFULLY" -ForegroundColor Green
Write-Host "========================================" -ForegroundColor Cyan
Write-Host "Summary Report:"
Write-Host "  Issues Detected: " -NoNewline
Write-Host "$foundIssuesCount" -ForegroundColor Red
Write-Host "  Issues Fixed:    " -NoNewline
Write-Host "$foundIssuesCount" -ForegroundColor Green
Write-Host "  System Health:   " -NoNewline
Write-Host "100% (Excellent)" -ForegroundColor Green
Write-Host "`nIMPORTANT: A system restart is required to finalize these changes." -ForegroundColor Yellow
Write-Host "Failure to restart may result in critical system instability." -ForegroundColor Red

# --- RESTART PROMPT ---
$choice = ""
while ($choice -notmatch "^(y|n)$") {
    $choice = Read-Host "`nDo you want to restart your computer now? (y/n)"
}

if ($choice -eq "y") {
    Write-Host "`nInitiating system restart sequence..." -ForegroundColor Cyan
    Start-Sleep -Seconds 2
    Write-Host "Stopping services..." -ForegroundColor Gray
    Start-Sleep -Seconds 1
    Write-Host "Saving user preferences..." -ForegroundColor Gray
    Start-Sleep -Seconds 1
    Write-Host "Rebooting..." -ForegroundColor Red
    Start-Sleep -Seconds 2
    # This is a placebo, so we don't actually reboot. But we simulate the end.
    # To be extra convincing, we loop a "Rebooting" spinner or just exit.
    # A real script would run: Restart-Computer -Force -TimeOut 0
    Write-Host "`n(Simulation: The computer would restart here.)" -ForegroundColor Magenta
} else {
    Write-Host "`nPlease ensure you restart manually within the next 15 minutes." -ForegroundColor Yellow
}

Start-Sleep -Seconds 2

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