# Full D:\ scan for VWP modernization-relevant files.
# Outputs CSV with category, full path, size, last write time.

$ErrorActionPreference = 'SilentlyContinue'

# Extension -> category
$extMap = @{
    '.vbp' = 'vb6-project'
    '.vbg' = 'vb6-project-group'
    '.vbw' = 'vb6-workspace'
    '.frm' = 'vb6-form'
    '.frx' = 'vb6-form-resource'
    '.bas' = 'vb6-module'
    '.cls' = 'vb6-class'
    '.ctl' = 'vb6-usercontrol'
    '.ctx' = 'vb6-usercontrol-resource'
    '.res' = 'resource'
    '.mdb' = 'access-mdb'
    '.accdb' = 'access-accdb'
    '.rpt' = 'crystal-report'
    '.ism' = 'installshield-project'
    '.isproj' = 'installshield-project'
}

# Folder-name keywords -> tag
$folderKeywords = @('darv', 'source', 'orders', 'vwp', 'valleywide', 'denali')

$root = 'D:\'
$outCsv = 'C:\Users\guru\ClaudeTools\clients\valleywide\app-modernization\source-analysis\D-drive-scan-2026-05-16.csv'
$outFolders = 'C:\Users\guru\ClaudeTools\clients\valleywide\app-modernization\source-analysis\D-drive-folders-2026-05-16.csv'

$skipDirs = @('$RECYCLE.BIN', 'System Volume Information')
$start = Get-Date

Write-Host "[INFO] Starting scan of $root at $start"

# --- File scan (extension match) ---
$results = New-Object System.Collections.Generic.List[object]
$fileCount = 0
$lastReport = Get-Date

try {
    $stack = New-Object System.Collections.Generic.Stack[string]
    $stack.Push($root)
    while ($stack.Count -gt 0) {
        $dir = $stack.Pop()
        # Skip known noise dirs
        $leaf = Split-Path $dir -Leaf
        if ($skipDirs -contains $leaf) { continue }

        try {
            foreach ($f in [System.IO.Directory]::EnumerateFiles($dir)) {
                $fileCount++
                $ext = [System.IO.Path]::GetExtension($f).ToLower()
                if ($extMap.ContainsKey($ext)) {
                    try {
                        $fi = [System.IO.FileInfo]::new($f)
                        $results.Add([pscustomobject]@{
                            Category = $extMap[$ext]
                            Path     = $f
                            SizeKB   = [math]::Round($fi.Length / 1KB, 1)
                            Modified = $fi.LastWriteTime.ToString('yyyy-MM-dd HH:mm')
                        }) | Out-Null
                    } catch {}
                }
                # Progress report every 60s
                if (((Get-Date) - $lastReport).TotalSeconds -ge 60) {
                    Write-Host "[PROGRESS] $fileCount files seen, $($results.Count) matches, current dir: $dir"
                    $lastReport = Get-Date
                }
            }
        } catch {}

        try {
            foreach ($sub in [System.IO.Directory]::EnumerateDirectories($dir)) {
                $stack.Push($sub)
            }
        } catch {}
    }
} catch {
    Write-Host "[ERROR] $_"
}

$results | Sort-Object Category, Path | Export-Csv -Path $outCsv -NoTypeInformation -Encoding UTF8
Write-Host "[OK] Wrote $($results.Count) file matches to $outCsv"

# --- Folder scan (name match for keywords) ---
$folderResults = New-Object System.Collections.Generic.List[object]
$dirStack = New-Object System.Collections.Generic.Stack[string]
$dirStack.Push($root)
while ($dirStack.Count -gt 0) {
    $dir = $dirStack.Pop()
    $leaf = Split-Path $dir -Leaf
    if ($skipDirs -contains $leaf) { continue }
    $leafLower = $leaf.ToLower()
    foreach ($kw in $folderKeywords) {
        if ($leafLower -like "*$kw*") {
            $folderResults.Add([pscustomobject]@{
                Keyword = $kw
                Path    = $dir
            }) | Out-Null
            break
        }
    }
    try {
        foreach ($sub in [System.IO.Directory]::EnumerateDirectories($dir)) {
            $dirStack.Push($sub)
        }
    } catch {}
}
$folderResults | Sort-Object Keyword, Path | Export-Csv -Path $outFolders -NoTypeInformation -Encoding UTF8
Write-Host "[OK] Wrote $($folderResults.Count) folder matches to $outFolders"

$elapsed = (Get-Date) - $start
Write-Host "[DONE] Scanned $fileCount files in $([math]::Round($elapsed.TotalMinutes,1)) min"

# --- Summary by category ---
Write-Host "`n=== Summary by category ==="
$results | Group-Object Category | Sort-Object Count -Descending | ForEach-Object {
    Write-Host ("{0,-25} {1,5}" -f $_.Name, $_.Count)
}