#9 Major routes refactor and expansion, #15 Added API for statistics, Added search cache backend and functionality tests, Backend sync improvements

internal/server/server.go

@@ -15,19 +15,14 @@ import (
 )
 
 type Server struct {
-	port            int
-	db             *db.Database
-	tokenHandler   *TokenHandler
+	port              int
+	db                *db.Database
+	tokenHandler      *TokenHandler
 	statisticsHandler *StatisticsHandler
-	httpServer     *http.Server
+	httpServer        *http.Server
 }
 
 var (
-	host           = os.Getenv("DB_HOST")
-	dbPort         = os.Getenv("DB_PORT")
-	dbName         = os.Getenv("DB_NAME")
-	username       = os.Getenv("DB_USERNAME")
-	password       = os.Getenv("DB_PASSWORD")
 	musicPath      = os.Getenv("MUSIC_PATH")
 	charactersPath = os.Getenv("CHARACTERS_PATH")
 	logLevel       = os.Getenv("LOG_LEVEL")
@@ -37,11 +32,20 @@ var (
 // NewServerInstance creates a new Server instance with all dependencies initialized.
 // Use this for dependency injection and proper lifecycle management.
 func NewServerInstance() *Server {
+	// Re-read environment variables at server creation time (not at package import time)
+	// This allows tests to override environment variables
+	host := os.Getenv("DB_HOST")
+	dbPort := os.Getenv("DB_PORT")
+	dbName := os.Getenv("DB_NAME")
+	username := os.Getenv("DB_USERNAME")
+	password := os.Getenv("DB_PASSWORD")
+
 	// Initialize logger
-	if logLevel == "" {
-		logLevel = "info"
+	currentLogLevel := logLevel
+	if currentLogLevel == "" {
+		currentLogLevel = "info"
 	}
-	logging.Init(logLevel, logJSON)
+	logging.Init(currentLogLevel, logJSON)
 
 	logger := logging.GetLogger()
 
@@ -68,15 +72,15 @@ func NewServerInstance() *Server {
 
 	// Initialize token handler with database pool
 	tokenHandler := NewTokenHandler(database.Pool)
-	
+
 	// Initialize statistics handler
 	statisticsHandler := NewStatisticsHandler()
 
 	// Create the server instance
 	appServer := &Server{
-		port:            port,
-		db:             database,
-		tokenHandler:   tokenHandler,
+		port:              port,
+		db:                database,
+		tokenHandler:      tokenHandler,
 		statisticsHandler: statisticsHandler,
 	}