defmodule ProxmoxAgent.Collectors.HostTest do
  use ExUnit.Case, async: true

  alias ProxmoxAgent.Collectors.Host

  @proc Path.expand("../../fixtures/proc", __DIR__)

  test "collects load average" do
    sample = Host.collect(proc_dir: @proc)
    assert sample.load1 == 0.42
    assert sample.load5 == 0.55
    assert sample.load15 == 0.31
  end

  test "collects memory in bytes" do
    sample = Host.collect(proc_dir: @proc)
    assert sample.mem_total_bytes == 16_384_000 * 1024
    assert sample.mem_available_bytes == 8_192_000 * 1024
    assert sample.mem_used_bytes == sample.mem_total_bytes - sample.mem_available_bytes
  end

  test "collects uptime seconds" do
    sample = Host.collect(proc_dir: @proc)
    assert sample.uptime_seconds == 123_456
  end

  test "includes hostname string" do
    sample = Host.collect(proc_dir: @proc)
    assert is_binary(sample.hostname)
    assert sample.hostname != ""
  end

  test "missing proc files yield :errors field, not a crash" do
    sample = Host.collect(proc_dir: "/nonexistent/path/xyz")
    assert sample.errors != []
  end
end