$ErrorActionPreference='Stop'
function Retry([scriptblock]$Action){for($i=0;$i -lt 40;$i++){try{return & $Action}catch{Start-Sleep -Milliseconds 250}};throw 'Excel busy'}
$root=Split-Path $PSScriptRoot -Parent
$excel=$null;$book=$null
try {
 $excel=New-Object -ComObject Excel.Application
 Retry {$excel.Visible=$true}
 Retry {$excel.DisplayAlerts=$false}
 Retry {$excel.AskToUpdateLinks=$false}
 Retry {$excel.AutomationSecurity=3}
 $book=Retry {$excel.Workbooks.Open((Join-Path $root '교각수량산출.xlsx'),0,$true)}
 $excel.ActiveWindow.DisplayHeadings=$false
 $excel.ActiveWindow.DisplayGridlines=$false
 $items=@(
  @('3.1 수량산출기준_토공','A2:AA95','criteria-earth'),
  @('3.1 수량산출기준_구조체 현황','A2:AC51','criteria-status'),
  @('3.1 수량산출기준_구조체','A2:AC102','criteria-structure'),
  @('3.2 관련변수','A2:AA16','variables-diagram')
 )
 foreach($item in $items){
  $sheet=$book.Worksheets.Item($item[0])
  $sheet.PageSetup.PrintArea=$item[1]
  $sheet.PageSetup.PrintHeadings=$false
  $sheet.PageSetup.PrintGridlines=$false
  $sheet.PageSetup.Zoom=$false
  $sheet.PageSetup.FitToPagesWide=1
  $sheet.PageSetup.FitToPagesTall=1
  $sheet.ExportAsFixedFormat(0,(Join-Path $root ('.cache/'+$item[2]+'.pdf')))
  Write-Output $item[2]
 }
} finally {
 if($book){Retry {$book.Close($false)};[void][Runtime.InteropServices.Marshal]::ReleaseComObject($book)}
 if($excel){Retry {$excel.Quit()};[void][Runtime.InteropServices.Marshal]::ReleaseComObject($excel)}
}