package config

import (
	"os"
	"strconv"
)

type Config struct {
	Port              string
	JWTSecret         string
	JWTIssuer         string
	JWTAudience       string
	ClassesServiceURL string
	OTLPEndpoint      string
	LogLevel          string
}

func Load() *Config {
	return &Config{
		Port:              getEnv("API_GATEWAY_PORT", "8080"),
		JWTSecret:         getEnv("JWT_SECRET", "p1-dev-secret-change-in-production"),
		JWTIssuer:         getEnv("JWT_ISSUER", "next-edu-cloud"),
		JWTAudience:       getEnv("JWT_AUDIENCE", "next-edu-cloud"),
		ClassesServiceURL: getEnv("CLASSES_SERVICE_URL", "http://localhost:3001"),
		OTLPEndpoint:      getEnv("OTEL_EXPORTER_OTLP_ENDPOINT", "http://localhost:4318"),
		LogLevel:          getEnv("LOG_LEVEL", "info"),
	}
}

func getEnv(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}

func getEnvInt(key string, fallback int) int {
	if v := os.Getenv(key); v != "" {
		if i, err := strconv.Atoi(v); err == nil {
			return i
		}
	}
	return fallback
}