param(
  [Parameter(Mandatory = $true)]
  [string]$Message,

  [Parameter(Mandatory = $true)]
  [string[]]$Scope,

  [string]$Branch
)

$ErrorActionPreference = "Stop"

if (-not $Branch) {
  $Branch = (git branch --show-current).Trim()
  if (-not $Branch) {
    throw "Could not determine current branch."
  }
}

foreach ($path in $Scope) {
  Write-Host "[push-scope] stage $path"
  git add -- $path
  if ($LASTEXITCODE -ne 0) {
    throw "git add failed for scope: $path"
  }
}

git diff --cached --quiet
if ($LASTEXITCODE -eq 0) {
  throw "No staged changes in selected scope."
}

git commit -m $Message
if ($LASTEXITCODE -ne 0) {
  throw "git commit failed."
}

git push origin $Branch
if ($LASTEXITCODE -ne 0) {
  throw "git push failed to branch: $Branch"
}

Write-Host "[push-scope] completed"