$ErrorActionPreference = 'SilentlyContinue'
$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$root = (Get-Item (Join-Path $scriptDir '..\..')).FullName
Set-Location $root
$mainBranch = 'master'
git show-ref --verify --quiet refs/heads/master 2>$null | Out-Null
if ($LASTEXITCODE -ne 0) {
  git show-ref --verify --quiet refs/heads/main 2>$null | Out-Null
  if ($LASTEXITCODE -eq 0) { $mainBranch = 'main' } else { $mainBranch = (git rev-parse --abbrev-ref HEAD 2>$null).Trim() }
}
Write-Host ''
Write-Host 'Files to be pushed:'
Write-Host '========================================'
$diff = git diff --name-status "origin/$mainBranch..HEAD" 2>$null
if ($LASTEXITCODE -eq 0 -and $diff) { Write-Host $diff } else {
  $log = git log --name-status --oneline HEAD 2>$null
  $lines = $log -split "`n" | Where-Object { $_.Trim() -and $_ -notmatch '^[a-f0-9]' }
  if ($lines) { Write-Host ($lines -join "`n") }
}
Write-Host '========================================'
Write-Host ''
Write-Host "Pushing to origin/$mainBranch..."
Write-Host '========================================'
git push origin $mainBranch
if ($LASTEXITCODE -eq 0) {
  Write-Host ''
  Write-Host '========================================'
  Write-Host '  success (Push successful)'
  Write-Host '========================================'
  exit 0
} else {
  Write-Host ''
  Write-Host '========================================'
  Write-Host '  failed (Push failed)'
  Write-Host '  Check error messages above.'
  Write-Host '========================================'
  exit 1
}