Push the rest

backend/analytics/internal/config/config.go

@@ -0,0 +1,54 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+type Config struct {
+	Port                  int
+	AWConnStr             string
+	WWIConnStr            string
+	PostgresDSN           string
+	OtelCollectorEndpoint string
+	OtelServiceName       string
+	OtelServiceNamespace  string
+	DefaultTopN           int
+	ForecastHorizonDays   int
+	DefaultHistoryDays    int
+}
+
+func Load() Config {
+	port, _ := strconv.Atoi(getEnv("PORT", "8080"))
+	topN, _ := strconv.Atoi(getEnv("DEFAULT_TOP_N", "10"))
+	forecastDays, _ := strconv.Atoi(getEnv("FORECAST_HORIZON_DAYS", "30"))
+	historyDays, _ := strconv.Atoi(getEnv("DEFAULT_HISTORY_DAYS", "365"))
+	return Config{
+		Port:                  port,
+		AWConnStr:             mustEnv("AW_MSSQL_DSN"),
+		WWIConnStr:            mustEnv("WWI_MSSQL_DSN"),
+		PostgresDSN:           mustEnv("POSTGRES_DSN"),
+		OtelCollectorEndpoint: getEnv("OTEL_COLLECTOR_ENDPOINT", "http://localhost:4318"),
+		OtelServiceName:       getEnv("OTEL_SERVICE_NAME", "otel-bi-analytics"),
+		OtelServiceNamespace:  getEnv("OTEL_SERVICE_NAMESPACE", "final-thesis"),
+		DefaultTopN:           topN,
+		ForecastHorizonDays:   forecastDays,
+		DefaultHistoryDays:    historyDays,
+	}
+}
+
+func getEnv(key, fallback string) string {
+	if v, ok := os.LookupEnv(key); ok && v != "" {
+		return v
+	}
+	return fallback
+}
+
+func mustEnv(key string) string {
+	v := os.Getenv(key)
+	if v == "" {
+		panic(fmt.Sprintf("required environment variable %s is not set", key))
+	}
+	return v
+}