module EhcToolkit

# File lib/ehc_toolkit.rb, line 31
def audit(pacman: nil)
  runner = pacman || default_pacman
  ok = pacman_available?(runner)

  EhcToolkitCatalog::PACKAGES.map do |entry|
    installed = ok ? installed?(entry[:name], pacman: runner) : nil
    entry.merge(installed: installed)
  end
end

# File lib/ehc_toolkit.rb, line 68
def default_pacman
  lambda do |flag, arg|
    args = ["pacman", flag]
    args << arg if arg && !arg.to_s.empty?
    Open3.capture2(*args)
  end
end

# File lib/ehc_toolkit.rb, line 16
def dispatch(pacman: nil)
  rows = audit(pacman: pacman)
  pacman_ok = pacman_available?(pacman)
  install_cmd = pacman_ok ? missing_install_command(rows) : full_install_command

  {
    success: true,
    reply: EhcReport.format_toolkit(
      audit: rows,
      install_cmd: install_cmd,
      pacman_ok: pacman_ok
    )
  }
end

# File lib/ehc_toolkit.rb, line 56
def full_install_command
  "pacman -S #{EhcToolkitCatalog::PACKAGES.map { |entry| entry[:name] }.join(' ')}"
end

# File lib/ehc_toolkit.rb, line 41
def installed?(name, pacman: nil)
  runner = pacman || default_pacman
  _stdout, status = runner.call("-Qq", name)
  status.success?
rescue StandardError
  false
end

# File lib/ehc_toolkit.rb, line 49
def missing_install_command(rows)
  missing = Array(rows).select { |row| row[:installed] == false }.map { |row| row[:name] }
  return nil if missing.empty?

  "pacman -S #{missing.join(' ')}"
end

# File lib/ehc_toolkit.rb, line 60
def pacman_available?(runner = nil)
  probe = runner || default_pacman
  _stdout, status = probe.call("--version", nil)
  status.success?
rescue StandardError
  false
end