// cell update - Update packages from remote sources
//
// This command checks for updates to all packages and downloads new versions.
// For local packages, ensures the symlink is correct.
// For remote packages, checks the remote for new commits.
//
// Usage:
//   cell update           - Update all packages
//   cell update <package> - Update a specific package

var shop = use('internal/shop')
var fd = use('fd')

var target_pkg = null

// Parse arguments
for (var i = 0; i < args.length; i++) {
  if (args[i] == '--help' || args[i] == '-h') {
    log.console("Usage: cell update [package]")
    log.console("Update packages from remote sources.")
    log.console("")
    log.console("Arguments:")
    log.console("  package  Optional package name to update. If omitted, updates all.")
    log.console("")
    log.console("This command checks for updates to all packages and downloads")
    log.console("new versions. For local packages, ensures the symlink is correct.")
    $stop()
  } else if (!args[i].startsWith('-')) {
    target_pkg = args[i]
    // Resolve relative paths to absolute paths
    if (target_pkg == '.' || target_pkg.startsWith('./') || target_pkg.startsWith('../') || fd.is_dir(target_pkg)) {
      var resolved = fd.realpath(target_pkg)
      if (resolved) {
        target_pkg = resolved
      }
    }
  }
}

function update_and_fetch(pkg)
{
  var lock = shop.load_lock()
  var old_entry = lock[pkg]
  var old_commit = old_entry ? old_entry.commit : null
  
  var new_entry = shop.update(pkg)
  
  if (new_entry) {
    if (new_entry.commit) {
      var old_str = old_commit ? old_commit.substring(0, 8) : "(new)"
      log.console("  " + pkg + " " + old_str + " -> " + new_entry.commit.substring(0, 8))
      shop.fetch(pkg)
    } else {
      // Local package - just ensure symlink is correct
      log.console("  " + pkg + " (local)")
    }
    shop.extract(pkg)
    shop.build_package_scripts(pkg)
    return true
  }
  return false
}

if (target_pkg) {
  if (update_and_fetch(target_pkg))
    log.console("Updated " + target_pkg + ".")
  else
    log.console(target_pkg + " is up to date.")
} else {
  var packages = shop.list_packages()
  var pkg_count = packages.length
  log.console("Checking for updates (" + text(pkg_count) + " package" + (pkg_count == 1 ? "" : "s") + ")...")
  
  var updated_count = 0
  
  for (var i = 0; i < packages.length; i++) {
    var pkg = packages[i]
    if (pkg == 'core') continue
    
    if (update_and_fetch(pkg)) {
      updated_count++
    }
  }
  
  if (updated_count > 0) {
    log.console("Updated " + text(updated_count) + " package" + (updated_count == 1 ? "" : "s") + ".")
  } else {
    log.console("All packages are up to date.")
  }
}

$stop()