more logging

internal/providers/openmeteo.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"io"
 	"net/http"
 	"net/url"
 	"time"
@@ -20,27 +21,27 @@ func (o *OpenMeteo) Fetch(ctxDone <-chan struct{}, site Site, model string) (*Fo
 		o.Client = &http.Client{Timeout: 15 * time.Second}
 	}
 
-	// Hourly fields that are useful for bias-correction / training
+	// Hourly fields supported by the ECMWF endpoint.
 	hourly := []string{
 		"temperature_2m",
-		"relative_humidity_2m",
 		"pressure_msl",
 		"wind_speed_10m",
 		"wind_gusts_10m",
 		"wind_direction_10m",
 		"precipitation",
-		"precipitation_probability",
 		"cloud_cover",
+		"relative_humidity_1000hPa",
 	}
 
-	u, _ := url.Parse("https://api.open-meteo.com/v1/forecast")
+	u, _ := url.Parse("https://api.open-meteo.com/v1/ecmwf")
 	q := u.Query()
 	q.Set("latitude", fmt.Sprintf("%.6f", site.Latitude))
 	q.Set("longitude", fmt.Sprintf("%.6f", site.Longitude))
 	q.Set("hourly", join(hourly))
 	q.Set("timezone", "UTC")
-	q.Set("models", model)      // e.g. "ecmwf"
-	q.Set("forecast_days", "7") // keep it short; you can increase later
+	q.Set("wind_speed_unit", "ms")
+	q.Set("temperature_unit", "celsius")
+	q.Set("precipitation_unit", "mm")
 	u.RawQuery = q.Encode()
 
 	ctx, cancel := context.WithCancel(context.Background())
@@ -55,6 +56,17 @@ func (o *OpenMeteo) Fetch(ctxDone <-chan struct{}, site Site, model string) (*Fo
 	defer resp.Body.Close()
 
 	if resp.StatusCode/100 != 2 {
+		body, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
+		var apiErr struct {
+			Error  bool   `json:"error"`
+			Reason string `json:"reason"`
+		}
+		if err := json.Unmarshal(body, &apiErr); err == nil && apiErr.Reason != "" {
+			return nil, fmt.Errorf("open-meteo HTTP %d: %s", resp.StatusCode, apiErr.Reason)
+		}
+		if len(body) > 0 {
+			return nil, fmt.Errorf("open-meteo HTTP %d: %s", resp.StatusCode, string(body))
+		}
 		return nil, fmt.Errorf("open-meteo HTTP %d", resp.StatusCode)
 	}
 
@@ -76,13 +88,18 @@ func (o *OpenMeteo) Fetch(ctxDone <-chan struct{}, site Site, model string) (*Fo
 
 	// Helpers pull float arrays (may be absent)
 	temp := floatArray(hr["temperature_2m"])
-	rh := floatArray(hr["relative_humidity_2m"])
+	rh := floatArray(hr["relative_humidity_1000hPa"])
+	if rh == nil {
+		rh = floatArray(hr["relative_humidity_2m"])
+	}
 	msl := floatArray(hr["pressure_msl"])
+	if msl == nil {
+		msl = floatArray(hr["surface_pressure"])
+	}
 	ws := floatArray(hr["wind_speed_10m"])
 	gust := floatArray(hr["wind_gusts_10m"])
 	wd := floatArray(hr["wind_direction_10m"])
 	precip := floatArray(hr["precipitation"])
-	pprob := floatArray(hr["precipitation_probability"])
 	cloud := floatArray(hr["cloud_cover"])
 
 	points := make([]HourlyForecastPoint, 0, len(times))
@@ -96,7 +113,7 @@ func (o *OpenMeteo) Fetch(ctxDone <-chan struct{}, site Site, model string) (*Fo
 			WindGustMS:   idx(gust, i),
 			WindDirDeg:   idx(wd, i),
 			PrecipMM:     idx(precip, i),
-			PrecipProb:   idx(pprob, i),
+			PrecipProb:   nil,
 			CloudCover:   idx(cloud, i),
 		})
 	}