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

  alias ProxmoxAgent.Collectors.Vms

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

  defp read!(name), do: File.read!(Path.join(@fixtures, name))

  defp fake_runner do
    fn
      "pvesh", ["get", "/nodes/" <> rest, "--output-format", "json"] ->
        cond do
          String.ends_with?(rest, "/qemu") ->
            {:ok, read!("qemu.json")}

          String.ends_with?(rest, "/lxc") ->
            {:ok, read!("lxc.json")}

          String.ends_with?(rest, "/qemu/100/config") ->
            {:ok, read!("qemu_100_config.json")}

          String.ends_with?(rest, "/qemu/100/agent/network-get-interfaces") ->
            {:ok, read!("qemu_100_agent_interfaces.json")}

          String.ends_with?(rest, "/qemu/101/config") ->
            {:ok, ~s({"name":"db-backup","cores":4,"memory":4096})}

          String.ends_with?(rest, "/qemu/101/agent/network-get-interfaces") ->
            {:error, {:nonzero_exit, 1, "QEMU guest agent is not running"}}

          String.ends_with?(rest, "/lxc/200/config") ->
            {:ok,
             ~s({"hostname":"minecraft","cores":4,"memory":4096,"net0":"name=eth0,ip=10.0.0.5/24"})}
        end
    end
  end

  describe "collect_runtime/1" do
    test "returns qemu + lxc runtime info" do
      sample = Vms.collect_runtime(node: "pve-01", runner: fake_runner())

      assert length(sample.vms) == 3
      nginx = Enum.find(sample.vms, &(&1.vmid == 100))
      assert nginx.type == "qemu"
      assert nginx.name == "nginx-proxy"
      assert nginx.status == "running"
      assert nginx.cpu_usage == 0.05
      assert nginx.mem_bytes == 536_870_912
      assert nginx.max_mem_bytes == 2_147_483_648
      assert nginx.tags == ["web", "production"]

      mc = Enum.find(sample.vms, &(&1.vmid == 200))
      assert mc.type == "lxc"
    end
  end

  describe "collect_detail/1" do
    test "returns per-VM config + IPs" do
      sample = Vms.collect_detail(node: "pve-01", runner: fake_runner())

      nginx = Enum.find(sample.vms, &(&1.vmid == 100))
      assert nginx.config["cores"] == 2
      assert nginx.config["memory"] == 2048
      assert "192.168.1.10" in nginx.ips

      db = Enum.find(sample.vms, &(&1.vmid == 101))
      assert db.config["cores"] == 4
      assert db.ips == []

      mc = Enum.find(sample.vms, &(&1.vmid == 200))
      assert mc.config["hostname"] == "minecraft"
      assert "10.0.0.5" in mc.ips
    end
  end
end