defmodule ToweropsWeb.AgentLive.HelpersTest do
  use ExUnit.Case, async: true

  alias ToweropsWeb.AgentLive.Helpers

  describe "agent_status/1" do
    test "returns :never when last_seen_at is nil" do
      agent_token = %{last_seen_at: nil}

      assert {:never, "Never connected"} = Helpers.agent_status(agent_token)
    end

    test "returns :online when last seen less than 120 seconds ago" do
      last_seen = DateTime.add(DateTime.utc_now(), -60, :second)
      agent_token = %{last_seen_at: last_seen}

      assert {:online, "Online"} = Helpers.agent_status(agent_token)
    end

    test "returns :online at the boundary just under 120 seconds" do
      last_seen = DateTime.add(DateTime.utc_now(), -118, :second)
      agent_token = %{last_seen_at: last_seen}

      assert {:online, "Online"} = Helpers.agent_status(agent_token)
    end

    test "returns :warning when last seen between 120 and 300 seconds ago" do
      last_seen = DateTime.add(DateTime.utc_now(), -200, :second)
      agent_token = %{last_seen_at: last_seen}

      assert {:warning, "Warning"} = Helpers.agent_status(agent_token)
    end

    test "returns :warning at the boundary of exactly 120 seconds" do
      last_seen = DateTime.add(DateTime.utc_now(), -120, :second)
      agent_token = %{last_seen_at: last_seen}

      assert {:warning, "Warning"} = Helpers.agent_status(agent_token)
    end

    test "returns :warning just under 300 seconds" do
      last_seen = DateTime.add(DateTime.utc_now(), -299, :second)
      agent_token = %{last_seen_at: last_seen}

      assert {:warning, "Warning"} = Helpers.agent_status(agent_token)
    end

    test "returns :offline when last seen 300 or more seconds ago" do
      last_seen = DateTime.add(DateTime.utc_now(), -300, :second)
      agent_token = %{last_seen_at: last_seen}

      assert {:offline, "Offline"} = Helpers.agent_status(agent_token)
    end

    test "returns :offline when last seen far in the past" do
      last_seen = DateTime.add(DateTime.utc_now(), -86_400, :second)
      agent_token = %{last_seen_at: last_seen}

      assert {:offline, "Offline"} = Helpers.agent_status(agent_token)
    end
  end

  describe "status_badge_class/1" do
    test "returns green classes for :online" do
      result = Helpers.status_badge_class(:online)

      assert result =~ "bg-green-100"
      assert result =~ "text-green-800"
    end

    test "returns yellow classes for :warning" do
      result = Helpers.status_badge_class(:warning)

      assert result =~ "bg-yellow-100"
      assert result =~ "text-yellow-800"
    end

    test "returns red classes for :offline" do
      result = Helpers.status_badge_class(:offline)

      assert result =~ "bg-red-100"
      assert result =~ "text-red-800"
    end

    test "returns gray classes for :never" do
      result = Helpers.status_badge_class(:never)

      assert result =~ "bg-gray-100"
      assert result =~ "text-gray-800"
    end
  end

  describe "status_dot_class/1" do
    test "returns green with animation for :online" do
      result = Helpers.status_dot_class(:online)

      assert result =~ "bg-green-600"
      assert result =~ "animate-pulse"
    end

    test "returns yellow without animation for :warning" do
      result = Helpers.status_dot_class(:warning)

      assert result =~ "bg-yellow-600"
      refute result =~ "animate-pulse"
    end

    test "returns red without animation for :offline" do
      result = Helpers.status_dot_class(:offline)

      assert result =~ "bg-red-600"
      refute result =~ "animate-pulse"
    end

    test "returns gray without animation for :never" do
      result = Helpers.status_dot_class(:never)

      assert result =~ "bg-gray-400"
      refute result =~ "animate-pulse"
    end
  end

  describe "format_uptime/1" do
    test "formats days and hours when days > 0" do
      # 2 days and 3 hours = 2*86400 + 3*3600 = 183600
      assert "2d 3h" = Helpers.format_uptime(183_600)
    end

    test "formats days and zero hours" do
      assert "1d 0h" = Helpers.format_uptime(86_400)
    end

    test "formats hours and minutes when hours > 0 and days == 0" do
      # 2 hours and 34 minutes = 2*3600 + 34*60 = 9240
      assert "2h 34m" = Helpers.format_uptime(9240)
    end

    test "formats only minutes when less than one hour" do
      # 45 minutes = 45 * 60 = 2700
      assert "45m" = Helpers.format_uptime(2700)
    end

    test "formats zero minutes" do
      assert "0m" = Helpers.format_uptime(0)
    end

    test "formats small number of seconds as 0m" do
      assert "0m" = Helpers.format_uptime(59)
    end

    test "returns Unknown for non-integer input" do
      assert "Unknown" = Helpers.format_uptime(nil)
    end

    test "returns Unknown for string input" do
      assert "Unknown" = Helpers.format_uptime("not a number")
    end

    test "returns Unknown for float input" do
      assert "Unknown" = Helpers.format_uptime(123.45)
    end
  end

  describe "format_agent_version/1" do
    test "prepends v to semver string" do
      assert "v1.2.3" = Helpers.format_agent_version("1.2.3")
    end

    test "prepends v to simple version" do
      assert "v0.1.0" = Helpers.format_agent_version("0.1.0")
    end

    test "returns timestamp as-is when it starts with date prefix" do
      timestamp = "2026-02-09T14:30:00Z"
      assert ^timestamp = Helpers.format_agent_version(timestamp)
    end

    test "returns timestamp as-is for other RFC 3339 formats" do
      timestamp = "2026-01-15T08:00:00+00:00"
      assert ^timestamp = Helpers.format_agent_version(timestamp)
    end

    test "returns nil for nil input" do
      assert nil == Helpers.format_agent_version(nil)
    end

    test "returns nil for non-binary input" do
      assert nil == Helpers.format_agent_version(123)
    end
  end

  describe "format_last_seen_with_date/2" do
    test "returns Never for nil datetime" do
      assert "Never" = Helpers.format_last_seen_with_date(nil)
    end

    test "returns Never for nil datetime with timezone" do
      assert "Never" = Helpers.format_last_seen_with_date(nil, "America/New_York")
    end

    test "formats relative time and full datetime for recent time" do
      dt = DateTime.add(DateTime.utc_now(), -30, :second)

      result = Helpers.format_last_seen_with_date(dt, "Etc/UTC")
      assert result =~ "s ago"
      assert result =~ "("
      assert result =~ ")"
    end
  end
end