defmodule MicrowavepropWeb.RoverPlanningLiveTest do
  use MicrowavepropWeb.ConnCase, async: true

  import Phoenix.LiveViewTest

  alias Microwaveprop.AccountsFixtures
  alias Microwaveprop.Radio.Maidenhead
  alias Microwaveprop.Repo
  alias Microwaveprop.Rover
  alias Microwaveprop.Rover.Location
  alias Microwaveprop.RoverPlanning
  alias Microwaveprop.RoverPlanning.Path
  alias Microwaveprop.Terrain.ElevationClient

  setup do
    Req.Test.stub(ElevationClient, fn conn ->
      params = Plug.Conn.fetch_query_params(conn).query_params
      lat_count = params["latitude"] |> String.split(",") |> length()
      Req.Test.json(conn, %{"elevation" => List.duplicate(200.0, lat_count)})
    end)

    :ok
  end

  defp create_mission(user, name, opts \\ []) do
    locations = Keyword.get(opts, :locations, [%{lat: 32.0, lon: -97.0, status: :good}])
    stations = Keyword.get(opts, :stations, %{"0" => %{"input" => "EM12kp", "position" => 0}})

    Enum.each(locations, fn attrs -> {:ok, _} = Rover.create_location(user, attrs) end)

    {:ok, mission} =
      RoverPlanning.create_mission(user, %{
        "name" => name,
        "band_mhz" => 10_000,
        "only_known_good" => true,
        "rover_height_ft" => 8.0,
        "station_height_ft" => 30.0,
        "stations" => stations
      })

    mission
  end

  describe "index" do
    test "anonymous visitor sees the table and a sign-in prompt", %{conn: conn} do
      {:ok, _lv, html} = live(conn, ~p"/rover-planning")
      assert html =~ "Rover Planning"
      assert html =~ "Sign in"
    end

    test "logged-in user sees the New mission button", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      conn = log_in_user(conn, user)
      {:ok, _lv, html} = live(conn, ~p"/rover-planning")
      assert html =~ "New mission"
    end

    test "table shows existing missions and links to the show page", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Visible mission")

      {:ok, _lv, html} = live(conn, ~p"/rover-planning")
      assert html =~ "Visible mission"
      assert html =~ ~s(href="/rover-planning/#{mission.id}")
    end
  end

  describe "show" do
    test "renders mission details + path table", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Detail mission")

      {:ok, _lv, html} = live(conn, ~p"/rover-planning/#{mission.id}")
      assert html =~ "Detail mission"
      assert html =~ "Stationary stations"
      assert html =~ "Path profiles"
    end

    test "group heading uses max-precision Maidenhead grid (10 chars)", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Precision mission")

      {:ok, _lv, html} = live(conn, ~p"/rover-planning/#{mission.id}")

      # Maidenhead.from_latlon(32.0, -97.0, 10) → "EM12VX00AA" (or similar
      # 10-char grid). The group heading must NOT truncate at 6 chars.
      grid_10 = Maidenhead.from_latlon(32.0, -97.0, 10)
      assert String.length(grid_10) == 10
      assert html =~ grid_10
    end

    test "station label uses derived grid when only lat/lon are stored", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      {:ok, _} = Rover.create_location(user, %{lat: 32.0, lon: -97.0, status: :good})

      # User enters raw coords (no callsign or grid lookup) → station ends
      # up with lat/lon set but callsign/grid blank.
      {:ok, mission} =
        RoverPlanning.create_mission(user, %{
          "name" => "Coord-only station mission",
          "band_mhz" => 10_000,
          "only_known_good" => true,
          "rover_height_ft" => 8.0,
          "station_height_ft" => 30.0,
          "stations" => %{"0" => %{"input" => "33.189,-96.452", "position" => 0}}
        })

      {:ok, _lv, html} = live(conn, ~p"/rover-planning/#{mission.id}")

      derived = Maidenhead.from_latlon(33.189, -96.452, 6)
      assert html =~ derived
      # The path-profiles "Station" cell must render the derived grid,
      # not the bare lat/lon. Match the exact <td>…</td> shape so we
      # don't trip on the Stationary-stations list at the top of the
      # page (which legitimately shows lat/lon as a secondary line).
      refute html =~ ~s(<td class="font-mono text-xs">33.189, -96.452</td>)
    end

    test "station label shows callsign + grid together when both are known", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Callsign-grid mission")

      [path | _] = Path |> Repo.all() |> Repo.preload(:station)
      {:ok, _} = path.station |> Ecto.Changeset.change(%{callsign: "AA5C", grid: "EM13se"}) |> Repo.update()

      {:ok, _lv, html} = live(conn, ~p"/rover-planning/#{mission.id}")

      # The path table should display "AA5C · EM13se" so the operator can
      # see both at a glance — not just one or the other and not lat/lon.
      assert html =~ "AA5C · EM13se"
    end

    test "path rows link to /path with mission params prefilled", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Click-through mission")

      {:ok, lv, _html} = live(conn, ~p"/rover-planning/#{mission.id}")

      # Each path row carries a phx-click that navigates to /path with
      # the mission's band + heights and the rover/station endpoints
      # filled in. Assert the click handler is present on the <tr>.
      rendered = render(lv)
      assert rendered =~ "phx-click"
      assert rendered =~ "/path?"
      assert rendered =~ "band=10000"
      assert rendered =~ "src_height_ft=8.0"
      assert rendered =~ "dst_height_ft=30.0"
    end

    test "groups paths by rover location", %{conn: conn} do
      user = AccountsFixtures.user_fixture()

      mission =
        create_mission(user, "Grouped mission",
          locations: [
            %{lat: 32.0, lon: -97.0, status: :good, notes: "Spot Alpha"},
            %{lat: 33.0, lon: -98.0, status: :good, notes: "Spot Bravo"}
          ],
          stations: %{
            "0" => %{"input" => "EM12kp", "position" => 0},
            "1" => %{"input" => "EM13qc", "position" => 1}
          }
        )

      {:ok, lv, html} = live(conn, ~p"/rover-planning/#{mission.id}")

      # One group container per rover location; both lat/lon labels appear
      # as group headings (not inline in cells like the old flat table).
      assert has_element?(lv, "[data-rover-group]")
      assert html =~ "32.0"
      assert html =~ "33.0"

      # 2 locations × 2 stations = 4 path rows split into 2 groups.
      group_count =
        lv
        |> render()
        |> then(&Regex.scan(~r/data-rover-group/, &1))
        |> length()

      assert group_count == 2
    end

    test "renders integer path-result values without crashing", %{conn: conn} do
      # JSONB round-trips bare zeros as integers (e.g. `0` not `0.0`), so the
      # show page MUST tolerate non-float numerics in `result`. Previously
      # `Float.round(value, n)` crashed with FunctionClauseError when value
      # came back as integer 0.
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Integer result mission")

      [path | _] = Repo.all(Path)

      {:ok, _} =
        path
        |> Ecto.Changeset.change(%{
          status: :complete,
          result: %{
            "distance_km" => 0,
            "min_clearance_m" => 0,
            "diffraction_db" => 0,
            "verdict" => "clear"
          }
        })
        |> Repo.update()

      {:ok, _lv, html} = live(conn, ~p"/rover-planning/#{mission.id}")
      assert html =~ "Integer result mission"
      assert html =~ "Clear"
    end

    test "owner can add a rover site from the show page", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Add-site mission")
      conn = log_in_user(conn, user)

      {:ok, lv, _html} = live(conn, ~p"/rover-planning/#{mission.id}")

      html =
        lv
        |> form("form[phx-submit='add_rover_site']", %{"input" => "33.5, -97.5"})
        |> render_submit()

      # New site appears in the rover-sites list, and a flash confirms.
      assert html =~ "Rover site added"
      assert html =~ Maidenhead.from_latlon(33.5, -97.5, 10)
      assert Repo.aggregate(Location, :count) == 2
    end

    test "owner can remove a rover site from the show page", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Remove-site mission")
      conn = log_in_user(conn, user)

      [site] = Repo.all(Location)

      {:ok, lv, _html} = live(conn, ~p"/rover-planning/#{mission.id}")

      html =
        lv
        |> element("button[phx-click='delete_rover_site'][phx-value-id='#{site.id}']")
        |> render_click()

      assert html =~ "Rover site removed"
      assert Repo.aggregate(Location, :count) == 0
    end

    test "anonymous visitor sees a sign-in prompt instead of the add form", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      mission = create_mission(user, "Anon-view mission")

      {:ok, lv, _html} = live(conn, ~p"/rover-planning/#{mission.id}")

      refute has_element?(lv, "form[phx-submit='add_rover_site']")
      assert has_element?(lv, "a", "Sign in")
    end

    test "redirects when mission missing", %{conn: conn} do
      missing = Ecto.UUID.generate()

      assert {:error, {:live_redirect, %{to: "/rover-planning"}}} =
               live(conn, ~p"/rover-planning/#{missing}")
    end
  end

  describe "form" do
    test "anonymous user gets redirected to /rover-planning", %{conn: conn} do
      assert {:error, {:live_redirect, %{to: "/rover-planning"}}} =
               live(conn, ~p"/rover-planning/new")
    end

    test "clicking 'Add station' does not show 'can't be blank' on the new row", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      conn = log_in_user(conn, user)
      {:ok, lv, _html} = live(conn, ~p"/rover-planning/new")

      html =
        lv
        |> element("button[phx-click='add_station']")
        |> render_click()

      # The new (untouched) station must not render a validation error until
      # the user actually interacts with its input.
      refute html =~ "can&#39;t be blank"
    end

    test "typing into the form does not flip the only_known_good checkbox", %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      conn = log_in_user(conn, user)
      {:ok, lv, _html} = live(conn, ~p"/rover-planning/new")

      html =
        lv
        |> form("#mission-form",
          mission: %{
            name: "Some name",
            band_mhz: "10000",
            rover_height_ft: "8.0",
            station_height_ft: "30.0",
            only_known_good: "true",
            stations: %{"0" => %{input: ""}}
          }
        )
        |> render_change()

      # The default-checked box must STILL be checked after a phx-change.
      # Hidden "false" + checkbox "true" with hidden first = checkbox wins.
      assert html =~
               ~s(name="mission[only_known_good]" value="true" checked)
    end

    test "logged-in user can create a mission with a callsign-input station",
         %{conn: conn} do
      user = AccountsFixtures.user_fixture()
      {:ok, _} = Rover.create_location(user, %{lat: 32.0, lon: -97.0, status: :good})
      conn = log_in_user(conn, user)

      {:ok, lv, html} = live(conn, ~p"/rover-planning/new")
      assert html =~ "Only check against known good locations"
      assert html =~ ~s(checked)

      {:error, {:live_redirect, %{to: redirect_to}}} =
        lv
        |> form("#mission-form",
          mission: %{
            name: "From form",
            band_mhz: "10000",
            only_known_good: "true",
            rover_height_ft: "8.0",
            station_height_ft: "30.0",
            stations: %{
              "0" => %{input: "EM12kp"}
            }
          }
        )
        |> render_submit()

      assert redirect_to =~ ~r{^/rover-planning/[0-9a-f-]+$}
    end
  end
end