# Get-SearchHistory.ps1
# Extracts Windows Search history from WordWheelQuery registry

param(
    [int]$MaxResults = 50,
    [switch]$ShowAll
)

Write-Host "=== Windows Search History ===" -ForegroundColor Cyan
Write-Host "Search queries from Windows Search Bar and File Explorer`n"

Write-Host "Note: Windows 11 without Microsoft account may not persist search history" -ForegroundColor Yellow
Write-Host "Modern search uses cloud sync and memory-only caching`n" -ForegroundColor Yellow

if ($ShowAll) {
    $MaxResults = [int]::MaxValue
}

$foundAny = $false

# WordWheelQuery - Windows Search history
Write-Host "--- WordWheelQuery (Search Bar / File Explorer) ---" -ForegroundColor Yellow
try {
    $wordWheelPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\WordWheelQuery"

    if (Test-Path $wordWheelPath) {
        $props = Get-ItemProperty -Path $wordWheelPath -ErrorAction SilentlyContinue

        # Get MRUListEx to determine order
        if ($props.MRUListEx) {
            $searches = @()

            # Parse MRUListEx (4-byte integers)
            for ($i = 0; $i -lt $props.MRUListEx.Length - 4; $i += 4) {
                $index = [BitConverter]::ToInt32($props.MRUListEx, $i)
                if ($index -eq -1) { break }  # End marker

                # Get the search term from the indexed property
                $propName = "$index"
                if ($props.$propName) {
                    # Convert binary data to Unicode string
                    $searchTerm = [System.Text.Encoding]::Unicode.GetString($props.$propName)
                    # Remove null terminators
                    $searchTerm = $searchTerm -replace '\x00', ''

                    if ($searchTerm) {
                        $searches += $searchTerm
                    }
                }
            }

            if ($searches.Count -gt 0) {
                $foundAny = $true
                Write-Host "Registry: $wordWheelPath`n" -ForegroundColor Gray

                $count = 0
                foreach ($search in ($searches | Select-Object -First $MaxResults)) {
                    $count++
                    Write-Host "  $count. $search" -ForegroundColor Green
                }

                if ($searches.Count -gt $MaxResults) {
                    Write-Host "`n  ... and $($searches.Count - $MaxResults) more" -ForegroundColor Gray
                }

                Write-Host "`nTotal searches: $($searches.Count)" -ForegroundColor Green
            } else {
                Write-Host "  No search history found" -ForegroundColor Gray
            }
        } else {
            Write-Host "  No MRUListEx found" -ForegroundColor Gray
        }
    } else {
        Write-Host "  Registry key not found" -ForegroundColor Gray
    }
} catch {
    Write-Host "  Error: $_" -ForegroundColor Red
}

# TypedPaths - File Explorer address bar typed paths
Write-Host "`n--- TypedPaths (File Explorer Address Bar) ---" -ForegroundColor Yellow
try {
    $typedPathsPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\TypedPaths"

    if (Test-Path $typedPathsPath) {
        $paths = Get-ItemProperty -Path $typedPathsPath -ErrorAction SilentlyContinue
        $pathList = @()

        # TypedPaths stores as url1, url2, etc.
        for ($i = 1; $i -le 50; $i++) {
            $urlKey = "url$i"
            if ($paths.$urlKey) {
                $pathList += $paths.$urlKey
            }
        }

        if ($pathList.Count -gt 0) {
            $foundAny = $true
            Write-Host "Registry: $typedPathsPath`n" -ForegroundColor Gray

            $count = 0
            foreach ($path in ($pathList | Select-Object -First $MaxResults)) {
                $count++
                Write-Host "  $count. $path" -ForegroundColor Green
            }

            Write-Host "`nTotal typed paths: $($pathList.Count)" -ForegroundColor Green
        } else {
            Write-Host "  No typed paths found" -ForegroundColor Gray
        }
    } else {
        Write-Host "  Registry key not found" -ForegroundColor Gray
    }
} catch {
    Write-Host "  Error: $_" -ForegroundColor Red
}

# RunMRU - Run dialog history
Write-Host "`n--- RunMRU (Run Dialog History) ---" -ForegroundColor Yellow
try {
    $runMRUPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU"

    if (Test-Path $runMRUPath) {
        $runProps = Get-ItemProperty -Path $runMRUPath -ErrorAction SilentlyContinue
        $runList = @()

        # RunMRU uses letter keys (a, b, c, etc.) and MRUList for order
        if ($runProps.MRUList) {
            $mruOrder = $runProps.MRUList.ToCharArray()

            foreach ($char in $mruOrder) {
                $key = [string]$char
                if ($runProps.$key) {
                    # Remove \1 terminator if present
                    $command = $runProps.$key -replace '\\1$', ''
                    if ($command) {
                        $runList += $command
                    }
                }
            }
        }

        if ($runList.Count -gt 0) {
            $foundAny = $true
            Write-Host "Registry: $runMRUPath`n" -ForegroundColor Gray

            $count = 0
            foreach ($cmd in ($runList | Select-Object -First $MaxResults)) {
                $count++
                Write-Host "  $count. $cmd" -ForegroundColor Green
            }

            Write-Host "`nTotal run commands: $($runList.Count)" -ForegroundColor Green
        } else {
            Write-Host "  No run history found" -ForegroundColor Gray
        }
    } else {
        Write-Host "  Registry key not found" -ForegroundColor Gray
    }
} catch {
    Write-Host "  Error: $_" -ForegroundColor Red
}

# Recent searches in specific apps (if available)
Write-Host "`n--- Cortana/Search App (if available) ---" -ForegroundColor Yellow
try {
    # Check for modern search database
    $searchPackage = Get-ChildItem "$env:LOCALAPPDATA\Packages" -Filter "Microsoft.Windows.Search_*" -Directory -ErrorAction SilentlyContinue | Select-Object -First 1

    if ($searchPackage) {
        $searchCache = Join-Path $searchPackage.FullName "LocalState\DeviceSearchCache"

        if (Test-Path $searchCache) {
            Write-Host "  Search cache found: $searchCache" -ForegroundColor Cyan
            Write-Host "  (Binary database - requires specialized tools to parse)" -ForegroundColor Yellow
        } else {
            Write-Host "  Search cache not found" -ForegroundColor Gray
        }
    } else {
        Write-Host "  Modern search app not found" -ForegroundColor Gray
    }
} catch {
    Write-Host "  Error: $_" -ForegroundColor Red
}

if (-not $foundAny) {
    Write-Host "`nNo search history found" -ForegroundColor Gray
    Write-Host "This is common on Windows 11 without a Microsoft account" -ForegroundColor Yellow
}

Write-Host "`nNote: Search history shows user queries and typed paths" -ForegroundColor Cyan
Write-Host "This can reveal file names, apps, and topics of interest" -ForegroundColor Cyan
Write-Host "`nWindows 11 Limitation: Modern search without Microsoft account" -ForegroundColor Yellow
Write-Host "does not persist history to registry (cloud-first design)" -ForegroundColor Yellow
Write-Host "This works best on Windows 10 or systems with Microsoft accounts" -ForegroundColor Yellow