refactor

internal/config/config.go

@@ -0,0 +1,71 @@
+package config
+
+import (
+	"fmt"
+	"log/slog"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/joho/godotenv"
+)
+
+// Config holds the application configuration.
+type Config struct {
+	ServerPort     string
+	AllowedOrigins []string
+	LogLevel       slog.Level
+	RT             bool
+	Spotify        struct {
+		ClientID     string
+		ClientSecret string
+		RefreshToken string
+	}
+}
+
+// Load loads the configuration from environment variables.
+func Load() (*Config, error) {
+	if err := godotenv.Load(); err != nil {
+		slog.Warn("no .env file found, using environment variables")
+	}
+
+	cfg := &Config{}
+
+	cfg.Spotify.ClientID = os.Getenv("SPOTIFY_CLIENT_ID")
+	cfg.Spotify.ClientSecret = os.Getenv("SPOTIFY_CLIENT_SECRET")
+	cfg.Spotify.RefreshToken = os.Getenv("SPOTIFY_REFRESH_TOKEN")
+
+	if cfg.Spotify.ClientID == "" || cfg.Spotify.ClientSecret == "" || cfg.Spotify.RefreshToken == "" {
+		return nil, fmt.Errorf("spotify credentials are not set")
+	}
+
+	cfg.ServerPort = os.Getenv("SERVER_PORT")
+	if cfg.ServerPort == "" {
+		cfg.ServerPort = "3000"
+	}
+
+	allowedOrigins := os.Getenv("ALLOWED_ORIGINS")
+	if allowedOrigins != "" {
+		cfg.AllowedOrigins = strings.Split(allowedOrigins, ",")
+	}
+
+	rt, err := strconv.ParseBool(os.Getenv("RT"))
+	if err != nil {
+		cfg.RT = false
+	} else {
+		cfg.RT = rt
+	}
+
+	switch strings.ToLower(os.Getenv("LOG_LEVEL")) {
+	case "debug":
+		cfg.LogLevel = slog.LevelDebug
+	case "warn":
+		cfg.LogLevel = slog.LevelWarn
+	case "error":
+		cfg.LogLevel = slog.LevelError
+	default:
+		cfg.LogLevel = slog.LevelInfo
+	}
+
+	return cfg, nil
+}