From 383c18e50a15bbe16f65d4c109be122d8fa2f8ed Mon Sep 17 00:00:00 2001
From: Graham McIntire <graham@mcintire.me>
Date: Sat, 4 Apr 2026 11:35:30 -0500
Subject: [PATCH] Show IEMRE gridded reanalysis data on contact detail page

---
 .../live/contact_live/show.ex                 | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/lib/microwaveprop_web/live/contact_live/show.ex b/lib/microwaveprop_web/live/contact_live/show.ex
index 14676741..7affd5c7 100644
--- a/lib/microwaveprop_web/live/contact_live/show.ex
+++ b/lib/microwaveprop_web/live/contact_live/show.ex
@@ -38,6 +38,7 @@ defmodule MicrowavepropWeb.ContactLive.Show do
     terrain = Terrain.get_terrain_profile(contact.id)
     contact = maybe_enqueue_terrain(terrain, contact)
     contact = maybe_enqueue_weather(weather, contact)
+    iemre = load_iemre(contact)
     elevation_profile = compute_elevation_profile(contact, hrrr_path, weather.soundings)
     propagation_analysis = build_propagation_analysis(contact, hrrr, terrain, elevation_profile, weather.soundings)
     data_sources = build_data_sources(hrrr, hrrr_path, terrain, weather, elevation_profile)
@@ -50,6 +51,7 @@ defmodule MicrowavepropWeb.ContactLive.Show do
        soundings: weather.soundings,
        solar: solar,
        hrrr: hrrr,
+       iemre: iemre,
        terrain: terrain,
        elevation_profile: elevation_profile,
        propagation_analysis: propagation_analysis,
@@ -254,6 +256,18 @@ defmodule MicrowavepropWeb.ContactLive.Show do
   defp sounding_sort_key("lifted_index"), do: &(&1.lifted_index || 0)
   defp sounding_sort_key(_), do: fn s -> s.station.name || s.station.station_code end
 
+  defp load_iemre(contact) do
+    case Weather.iemre_for_contact(contact) do
+      %{hourly: hourly} = obs when is_list(hourly) and hourly != [] ->
+        qso_hour = contact.qso_timestamp.hour
+        nearest = Enum.min_by(hourly, fn h -> abs((h["utc_hour"] || 0) - qso_hour) end)
+        %{observation: obs, nearest_hour: nearest}
+
+      _ ->
+        nil
+    end
+  end
+
   defp load_weather(contact) do
     lat1 = contact.pos1 && contact.pos1["lat"]
     lon1 = contact.pos1 && (contact.pos1["lon"] || contact.pos1["lng"])
@@ -799,6 +813,47 @@ defmodule MicrowavepropWeb.ContactLive.Show do
 
       <div class="divider" />
 
+      <h2 class="text-base font-semibold mb-2">IEMRE Gridded Reanalysis</h2>
+      <%= if @iemre do %>
+        <% h = @iemre.nearest_hour %>
+        <% obs = @iemre.observation %>
+        <div class="text-xs opacity-60 mb-2">
+          Grid point: {format_number(obs.lat)}°, {format_number(obs.lon)}° &mdash; {obs.date} hour {h[
+            "utc_hour"
+          ] || "—"} UTC
+        </div>
+        <div class="flex flex-wrap gap-x-6 gap-y-1 text-sm">
+          <div><span class="font-semibold">Temp:</span> {format_number(h["air_temp_f"])}°F</div>
+          <div><span class="font-semibold">Dewpoint:</span> {format_number(h["dew_point_f"])}°F</div>
+          <div><span class="font-semibold">Sky Cover:</span> {format_number(h["skyc_%"])}%</div>
+          <div>
+            <span class="font-semibold">Wind:</span>
+            {format_number(wind_speed_from_components(h["uwnd_mps"], h["vwnd_mps"]))} kts
+          </div>
+          <div>
+            <span class="font-semibold">Precip:</span> {format_number(h["hourly_precip_in"])}"
+          </div>
+          <div :if={h["soil4t_f"]}>
+            <span class="font-semibold">Soil Temp:</span> {format_number(h["soil4t_f"])}°F
+          </div>
+        </div>
+      <% else %>
+        <div class="text-sm text-base-content/50 italic">
+          <%= case @contact.iemre_status do %>
+            <% :queued -> %>
+              <span class="flex items-center gap-2">
+                <span class="loading loading-spinner loading-sm"></span> Fetching IEMRE data
+              </span>
+            <% :unavailable -> %>
+              IEMRE data unavailable for this contact.
+            <% _ -> %>
+              No IEMRE data available.
+          <% end %>
+        </div>
+      <% end %>
+
+      <div class="divider" />
+
       <h2 class="text-base font-semibold mb-2">Surface Observations</h2>
       <%= if @surface_observations == [] do %>
         <div class="text-sm text-base-content/50 italic">
@@ -931,6 +986,13 @@ defmodule MicrowavepropWeb.ContactLive.Show do
   defp format_number(n) when is_float(n), do: :erlang.float_to_binary(n, decimals: 1)
   defp format_number(n), do: to_string(n)
 
+  defp wind_speed_from_components(u, v) when is_number(u) and is_number(v) do
+    mps = :math.sqrt(u * u + v * v)
+    Float.round(mps * 1.944, 1)
+  end
+
+  defp wind_speed_from_components(_, _), do: nil
+
   defp format_dist(km) do
     mi = km * 0.621371
     "#{:erlang.float_to_binary(mi, decimals: 1)} mi (#{:erlang.float_to_binary(km, decimals: 1)} km)"