defmodule ToweropsWeb.Api.V1.AlertsControllerTest do
  use ToweropsWeb.ConnCase, async: true

  import Towerops.AccountsFixtures
  import Towerops.DevicesFixtures
  import Towerops.OrganizationsFixtures

  alias Towerops.Alerts
  alias Towerops.ApiTokens

  setup do
    user = user_fixture()
    organization = organization_fixture(user.id)

    {:ok, {_token, raw_token}} =
      ApiTokens.create_api_token(%{
        organization_id: organization.id,
        user_id: user.id,
        name: "Test Token"
      })

    conn =
      build_conn()
      |> put_req_header("authorization", "Bearer #{raw_token}")
      |> put_req_header("accept", "application/json")

    %{
      conn: conn,
      user: user,
      organization: organization
    }
  end

  defp create_alert(device, attrs \\ %{}) do
    default_attrs = %{
      device_id: device.id,
      alert_type: "ping_down",
      message: "Device unreachable",
      triggered_at: Towerops.Time.now()
    }

    {:ok, alert} = Alerts.create_alert(Map.merge(default_attrs, attrs))
    alert
  end

  describe "index/2" do
    test "lists alerts for the authenticated organization", %{
      conn: conn,
      organization: organization
    } do
      device = device_fixture(%{organization_id: organization.id})
      alert1 = create_alert(device)
      alert2 = create_alert(device, %{alert_type: "device_down", message: "SNMP timeout"})

      conn = get(conn, ~p"/api/v1/alerts")

      assert %{"data" => alerts} = json_response(conn, 200)
      assert length(alerts) == 2

      alert_ids = Enum.map(alerts, & &1["id"])
      assert alert1.id in alert_ids
      assert alert2.id in alert_ids

      alert_json = List.first(alerts)
      assert Map.has_key?(alert_json, "id")
      assert Map.has_key?(alert_json, "alert_type")
      assert Map.has_key?(alert_json, "message")
      assert Map.has_key?(alert_json, "triggered_at")
      assert Map.has_key?(alert_json, "acknowledged_at")
      assert Map.has_key?(alert_json, "resolved_at")
      assert Map.has_key?(alert_json, "device_id")
      assert Map.has_key?(alert_json, "device_name")
      assert Map.has_key?(alert_json, "acknowledged_by_email")
      assert Map.has_key?(alert_json, "gaiia_impact")
      assert Map.has_key?(alert_json, "inserted_at")
    end

    test "returns empty list when organization has no alerts", %{conn: conn} do
      conn = get(conn, ~p"/api/v1/alerts")

      assert %{"data" => []} = json_response(conn, 200)
    end

    test "filters by status param for open alerts", %{
      conn: conn,
      organization: organization
    } do
      device = device_fixture(%{organization_id: organization.id})
      _open_alert = create_alert(device)

      resolved_alert = create_alert(device, %{alert_type: "device_down", message: "Resolved one"})
      Alerts.resolve_alert(resolved_alert)

      conn = get(conn, ~p"/api/v1/alerts?status=active")

      assert %{"data" => alerts} = json_response(conn, 200)
      assert length(alerts) == 1

      [returned] = alerts
      assert is_nil(returned["resolved_at"])
    end

    test "filters by device_id param", %{
      conn: conn,
      organization: organization
    } do
      device1 = device_fixture(%{organization_id: organization.id})
      device2 = device_fixture(%{organization_id: organization.id})

      _alert1 = create_alert(device1)
      _alert2 = create_alert(device2)

      conn = get(conn, ~p"/api/v1/alerts?device_id=#{device1.id}")

      assert %{"data" => alerts} = json_response(conn, 200)
      assert length(alerts) == 1
      assert List.first(alerts)["device_id"] == device1.id
    end

    test "does not return alerts from other organizations", %{conn: conn} do
      other_user = user_fixture()
      other_org = organization_fixture(other_user.id)
      other_device = device_fixture(%{organization_id: other_org.id})
      _other_alert = create_alert(other_device)

      conn = get(conn, ~p"/api/v1/alerts")

      assert %{"data" => []} = json_response(conn, 200)
    end
  end

  describe "show/2" do
    test "returns alert details when it belongs to the organization", %{
      conn: conn,
      organization: organization
    } do
      device = device_fixture(%{organization_id: organization.id})
      alert = create_alert(device)

      conn = get(conn, ~p"/api/v1/alerts/#{alert.id}")

      assert %{"data" => alert_json} = json_response(conn, 200)
      assert alert_json["id"] == alert.id
      assert alert_json["alert_type"] == "ping_down"
      assert alert_json["message"] == "Device unreachable"
      assert alert_json["device_id"] == device.id
      assert alert_json["device_name"] == device.name
    end

    test "returns 404 when alert does not exist", %{conn: conn} do
      conn = get(conn, ~p"/api/v1/alerts/#{Ecto.UUID.generate()}")

      assert %{"error" => "Alert not found"} = json_response(conn, 404)
    end

    test "returns 404 when alert belongs to a different organization", %{conn: conn} do
      other_user = user_fixture()
      other_org = organization_fixture(other_user.id)
      other_device = device_fixture(%{organization_id: other_org.id})
      other_alert = create_alert(other_device)

      conn = get(conn, ~p"/api/v1/alerts/#{other_alert.id}")

      assert %{"error" => "Alert not found"} = json_response(conn, 404)
    end
  end

  describe "acknowledge/2" do
    test "sets acknowledged_at on the alert", %{
      conn: conn,
      organization: organization
    } do
      device = device_fixture(%{organization_id: organization.id})
      alert = create_alert(device)

      conn = post(conn, ~p"/api/v1/alerts/#{alert.id}/acknowledge")

      assert %{"data" => alert_json} = json_response(conn, 200)
      assert alert_json["id"] == alert.id
      assert alert_json["acknowledged_at"]
    end

    test "returns 404 when alert belongs to a different organization", %{conn: conn} do
      other_user = user_fixture()
      other_org = organization_fixture(other_user.id)
      other_device = device_fixture(%{organization_id: other_org.id})
      other_alert = create_alert(other_device)

      conn = post(conn, ~p"/api/v1/alerts/#{other_alert.id}/acknowledge")

      assert %{"error" => "Alert not found"} = json_response(conn, 404)
    end

    test "returns 404 when alert does not exist", %{conn: conn} do
      conn = post(conn, ~p"/api/v1/alerts/#{Ecto.UUID.generate()}/acknowledge")

      assert %{"error" => "Alert not found"} = json_response(conn, 404)
    end
  end

  describe "resolve/2" do
    test "sets resolved_at on the alert", %{
      conn: conn,
      organization: organization
    } do
      device = device_fixture(%{organization_id: organization.id})
      alert = create_alert(device)

      conn = post(conn, ~p"/api/v1/alerts/#{alert.id}/resolve")

      assert %{"data" => alert_json} = json_response(conn, 200)
      assert alert_json["id"] == alert.id
      assert alert_json["resolved_at"]
    end

    test "returns 404 when alert belongs to a different organization", %{conn: conn} do
      other_user = user_fixture()
      other_org = organization_fixture(other_user.id)
      other_device = device_fixture(%{organization_id: other_org.id})
      other_alert = create_alert(other_device)

      conn = post(conn, ~p"/api/v1/alerts/#{other_alert.id}/resolve")

      assert %{"error" => "Alert not found"} = json_response(conn, 404)
    end

    test "returns 404 when alert does not exist", %{conn: conn} do
      conn = post(conn, ~p"/api/v1/alerts/#{Ecto.UUID.generate()}/resolve")

      assert %{"error" => "Alert not found"} = json_response(conn, 404)
    end
  end

  describe "authentication" do
    test "returns 401 without authorization header" do
      conn =
        build_conn()
        |> put_req_header("accept", "application/json")
        |> get(~p"/api/v1/alerts")

      assert %{"error" => _message} = json_response(conn, 401)
    end

    test "returns 401 with invalid token" do
      conn =
        build_conn()
        |> put_req_header("authorization", "Bearer towerops_invalid_token")
        |> put_req_header("accept", "application/json")
        |> get(~p"/api/v1/alerts")

      assert %{"error" => _message} = json_response(conn, 401)
    end
  end
end