Fix some bugs

internal/generator/enum.go

@@ -3,10 +3,20 @@ package generator
 import (
 	"fmt"
 	"strings"
+	"unicode"
 
 	"github.com/entity-maker/entity-maker/internal/naming"
 )
 
+// sanitizePythonIdentifier ensures the identifier is valid Python syntax
+func sanitizePythonIdentifier(identifier string) string {
+	// If identifier starts with a digit, prefix with underscore
+	if len(identifier) > 0 && unicode.IsDigit(rune(identifier[0])) {
+		return "_" + identifier
+	}
+	return identifier
+}
+
 // GenerateEnum generates the enum types file
 func GenerateEnum(ctx *Context) (string, error) {
 	var b strings.Builder
@@ -24,12 +34,24 @@ func GenerateEnum(ctx *Context) (string, error) {
 		if len(enumType.Values) == 0 {
 			b.WriteString("    pass\n")
 		} else {
+			// Track seen identifiers to avoid duplicates
+			seenIdentifiers := make(map[string]bool)
+
 			for _, value := range enumType.Values {
 				// Convert value to valid Python identifier
 				// Usually enum values are already uppercase like "OPEN", "IN_PROGRESS"
 				identifier := strings.ToUpper(strings.ReplaceAll(value, " ", "_"))
 				identifier = strings.ReplaceAll(identifier, "-", "_")
 
+				// Ensure identifier doesn't start with a digit
+				identifier = sanitizePythonIdentifier(identifier)
+
+				// Skip if we've already seen this identifier
+				if seenIdentifiers[identifier] {
+					continue
+				}
+				seenIdentifiers[identifier] = true
+
 				b.WriteString(fmt.Sprintf("    %s = \"%s\"\n", identifier, value))
 			}
 		}