# Compare sql/*.sql migrations against db.sql
$dbPath = "c:\Users\wilso\Desktop\oms0414-back\db.sql"
$sqlDir = "c:\Users\wilso\Desktop\oms0414-back\sql"
$db = [IO.File]::ReadAllText($dbPath)

function HasCol([string]$name) {
  return $db.Contains("`$name`".Replace('$name', $name)) -or $db.Contains("``$name``")
}

# simpler: look for `ColName`
function ColInDb([string]$name) {
  return $db.IndexOf("`" + $name + "`" ) -ge 0 -or $db.IndexOf("``$name``") -ge 0
}

function ColInDb2([string]$name) {
  $needle = [char]96 + $name + [char]96  # backtick Col backtick
  return $db.Contains($needle)
}

function TableInDb([string]$name) {
  $needle = "CREATE TABLE " + [char]96 + $name + [char]96
  return $db.Contains($needle)
}

$files = Get-ChildItem "$sqlDir\*.sql" | Where-Object { $_.Name -notmatch 'menu_notes' } | Sort-Object Name
$missing = @()

foreach ($f in $files) {
  $content = [IO.File]::ReadAllText($f.FullName)
  $createMatches = [regex]::Matches($content, 'CREATE TABLE(?: IF NOT EXISTS)?\s+`([^`]+)`', 'IgnoreCase')
  $addMatches = [regex]::Matches($content, 'ADD COLUMN(?: IF NOT EXISTS)?\s+`([^`]+)`', 'IgnoreCase')
  $dropMatches = [regex]::Matches($content, 'DROP COLUMN\s+`([^`]+)`', 'IgnoreCase')
  $modMatches = [regex]::Matches($content, 'MODIFY COLUMN\s+`([^`]+)`', 'IgnoreCase')

  $section = @()
  foreach ($m in $createMatches) {
    $t = $m.Groups[1].Value
    if (-not (TableInDb $t)) {
      $section += "MISSING TABLE: $t"
      $missing += "$($f.Name) -> TABLE $t"
    } else {
      $section += "OK TABLE: $t"
    }
  }
  foreach ($m in $addMatches) {
    $c = $m.Groups[1].Value
    if (-not (ColInDb2 $c)) {
      $section += "MISSING COL (ADD): $c"
      $missing += "$($f.Name) -> ADD $c"
    } else {
      $section += "OK COL (ADD): $c"
    }
  }
  foreach ($m in $dropMatches) {
    $c = $m.Groups[1].Value
    if (ColInDb2 $c) {
      $section += "STILL IN db (DROP intended): $c"
      $missing += "$($f.Name) -> DROP not applied in db.sql: $c"
    } else {
      $section += "OK DROPPED: $c"
    }
  }
  foreach ($m in $modMatches) {
    $c = $m.Groups[1].Value
    if (-not (ColInDb2 $c)) {
      $section += "MISSING COL (MODIFY): $c"
      $missing += "$($f.Name) -> MODIFY $c (col absent)"
    }
  }

  if ($section.Count -gt 0) {
    Write-Output "==== $($f.Name) ===="
    $section | ForEach-Object { Write-Output "  $_" }
  }
}

Write-Output ""
Write-Output "==== SUMMARY MISSING ===="
if ($missing.Count -eq 0) { Write-Output "(none)" } else { $missing | ForEach-Object { Write-Output $_ } }