Fixed logging, added config and .env example

utils/config.go

@@ -0,0 +1,86 @@
+package utils
+
+import (
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	DataPath  string
+	Address   string
+	Port      int
+	ChunkSize int
+	LogLevel  string
+	LogFormat string
+	AuditLog  bool
+}
+
+func NewConfig() *Config {
+	_ = godotenv.Load()
+
+	config := &Config{
+		DataPath:  sanitizeDataPath(os.Getenv("DATA_PATH")),
+		Address:   firstNonEmpty(strings.TrimSpace(os.Getenv("ADDRESS")), "0.0.0.0"),
+		Port:      envInt("PORT", 3000),
+		ChunkSize: envInt("CHUNK_SIZE", 8192000),
+		LogLevel:  strings.ToLower(firstNonEmpty(strings.TrimSpace(os.Getenv("LOG_LEVEL")), "info")),
+		LogFormat: strings.ToLower(firstNonEmpty(strings.TrimSpace(os.Getenv("LOG_FORMAT")), strings.TrimSpace(os.Getenv("LOG_TYPE")), "text")),
+		AuditLog:  envBool("AUDIT_LOG", true),
+	}
+
+	if config.LogFormat != "json" && config.LogFormat != "text" {
+		config.LogFormat = "text"
+	}
+
+	return config
+
+}
+
+func envInt(key string, defaultValue int) int {
+	raw := strings.TrimSpace(os.Getenv(key))
+	if raw == "" {
+		return defaultValue
+	}
+	value, err := strconv.Atoi(raw)
+	if err != nil {
+		return defaultValue
+	}
+	return value
+}
+
+func envBool(key string, defaultValue bool) bool {
+	raw := strings.TrimSpace(os.Getenv(key))
+	if raw == "" {
+		return defaultValue
+	}
+	value, err := strconv.ParseBool(raw)
+	if err != nil {
+		return defaultValue
+	}
+	return value
+}
+
+func firstNonEmpty(values ...string) string {
+	for _, v := range values {
+		if v != "" {
+			return v
+		}
+	}
+	return ""
+}
+
+func sanitizeDataPath(raw string) string {
+	cleaned := strings.TrimSpace(raw)
+	if cleaned == "" {
+		cleaned = "."
+	}
+	cleaned = filepath.Clean(cleaned)
+	if abs, err := filepath.Abs(cleaned); err == nil {
+		return abs
+	}
+	return cleaned
+}