# Comprehensive DOS 6.22 compatibility checker
# Scans all BAT files for incompatible commands

$BATFiles = Get-ChildItem *.BAT | Where-Object { $_.Name -notlike "*_FROM_*" -and $_.Name -notlike "*_TEST*" -and $_.Name -notlike "*_VERIFY*" -and $_.Name -notlike "*_CHECK*" -and $_.Name -notlike "*_MONITOR*" }

Write-Host "========================================" -ForegroundColor Red
Write-Host "DOS 6.22 COMPATIBILITY CHECK" -ForegroundColor Red
Write-Host "========================================" -ForegroundColor Red
Write-Host ""

$TotalIssues = 0

# DOS 6.22 INCOMPATIBLE patterns
$IncompatiblePatterns = @(
    @{Pattern='SET\s+/P'; Description='SET /P (interactive input) - NOT in DOS 6.22'},
    @{Pattern='SET\s+/A'; Description='SET /A (arithmetic) - NOT in DOS 6.22'},
    @{Pattern='IF\s+/I'; Description='IF /I (case-insensitive) - NOT in DOS 6.22'},
    @{Pattern='FOR\s+/F'; Description='FOR /F (parse files) - NOT in DOS 6.22'},
    @{Pattern='FOR\s+/L'; Description='FOR /L (loop) - NOT in DOS 6.22'},
    @{Pattern='FOR\s+/D'; Description='FOR /D (directories) - NOT in DOS 6.22'},
    @{Pattern='FOR\s+/R'; Description='FOR /R (recursive) - NOT in DOS 6.22'},
    @{Pattern='GOTO\s+:EOF'; Description='GOTO :EOF - NOT in DOS 6.22 (use GOTO END)'},
    @{Pattern='%COMPUTERNAME%'; Description='%COMPUTERNAME% - NOT in DOS 6.22'},
    @{Pattern='%USERNAME%'; Description='%USERNAME% - NOT in DOS 6.22'},
    @{Pattern='%USERPROFILE%'; Description='%USERPROFILE% - NOT in DOS 6.22'},
    @{Pattern='&&'; Description='&& operator - NOT in DOS 6.22'},
    @{Pattern='\|\|'; Description='|| operator - NOT in DOS 6.22'},
    @{Pattern='\\NUL(?!\s|$)'; Description='\NUL as filename - INVALID (use \*.* for directory test)'},
    @{Pattern='XCOPY.*\/Q'; Description='XCOPY /Q (quiet mode) - NOT in DOS 6.22'},
    @{Pattern='IF.*\('; Description='IF ( ... ) multi-line blocks - NOT in DOS 6.22 (use GOTO labels)'},
    @{Pattern='\)\s*ELSE\s*\('; Description=') ELSE ( clause - NOT in DOS 6.22 (use GOTO labels)'},
    @{Pattern='^PAUSE\s+'; Description='PAUSE message - NOT in DOS 6.22 (use ECHO then PAUSE)'},
    @{Pattern='\|.*\|.*>>'; Description='Double pipe with redirect (|..|..>>) - NOT reliable in DOS 6.22 (use temp files)'},
    @{Pattern='CHOICE\s+/[A-Z]'; Description='CHOICE with options - Check if CHOICE.COM available'},
    @{Pattern='START\s+'; Description='START command - NOT in DOS 6.22'}
)

foreach ($File in $BATFiles) {
    Write-Host "Checking: $($File.Name)" -ForegroundColor Cyan

    $Content = Get-Content $File.FullName
    $FileIssues = 0

    foreach ($Pattern in $IncompatiblePatterns) {
        $LineNum = 0
        foreach ($Line in $Content) {
            $LineNum++
            if ($Line -match $Pattern.Pattern) {
                if ($FileIssues -eq 0) {
                    Write-Host ""
                }
                Write-Host "  [ERROR] Line $LineNum : $($Pattern.Description)" -ForegroundColor Red
                Write-Host "    > $Line" -ForegroundColor Yellow
                $FileIssues++
                $TotalIssues++
            }
        }
    }

    if ($FileIssues -eq 0) {
        Write-Host "  [OK] No incompatibilities found" -ForegroundColor Green
    }

    Write-Host ""
}

Write-Host "========================================" -ForegroundColor Red
Write-Host "TOTAL ISSUES FOUND: $TotalIssues" -ForegroundColor Red
Write-Host "========================================" -ForegroundColor Red

if ($TotalIssues -gt 0) {
    Write-Host ""
    Write-Host "ACTION REQUIRED: Fix all incompatibilities before deployment" -ForegroundColor Red
}