feat: debug mode

Author: whes1015

lib/utils/shader_selector.dart

@@ -61,6 +61,8 @@ class ShaderConfig {
 }
 
 class ShaderSelector {
+  static bool debugForceThunderstormFog = false;
+
   static bool _isThunderstormCode(int code) {
     return code == 103 ||
         code == 104 ||
@@ -93,11 +95,34 @@ class ShaderSelector {
   }
 
   static ShaderConfig selectShaderConfig(RealtimeWeather? weather) {
-    return const ShaderConfig(
-      showFog: true,
-      showRain: false,
-      showThunderstorm: true,
-      fogIntensity: 0.2,
+    if (debugForceThunderstormFog) {
+      return const ShaderConfig(
+        showFog: true,
+        showRain: false,
+        showThunderstorm: true,
+        fogIntensity: 0.2,
+      );
+    }
+
+    if (weather == null) {
+      return const ShaderConfig();
+    }
+
+    final weatherCode = weather.data.weatherCode;
+    final rain = weather.data.rain;
+    final visibility = parseVisibility(weather.data.visibility);
+
+    final showThunderstorm = _isThunderstormCode(weatherCode);
+    final showRain =
+        (_isRainCode(weatherCode) || rain > 0) && !showThunderstorm;
+    final showFog = visibility < 5.0 || _isFogCode(weatherCode);
+    final fogIntensity = showFog ? calculateFogIntensity(visibility) : 0.0;
+
+    return ShaderConfig(
+      showFog: showFog,
+      showRain: showRain,
+      showThunderstorm: showThunderstorm,
+      fogIntensity: fogIntensity,
     );
   }
 

lib/utils/wallpaper_selector.dart

@@ -1,6 +1,6 @@
-import 'dart:math' as math;
-
 class WallpaperSelector {
+  static String? debugWallpaperPath = null;
+
   static const List<String> dayWallpapers = [
     'assets/wallpaper/day/autumn_park.jpg',
     'assets/wallpaper/day/city_foggy.jpg',
@@ -28,17 +28,32 @@ class WallpaperSelector {
     'assets/wallpaper/night/town_hillside.jpg',
   ];
 
+  static int _hashDate(DateTime date) {
+    final dayOfYear = date.difference(DateTime(date.year, 1, 1)).inDays + 1;
+    return (date.year * 1000 + dayOfYear) % 2147483647;
+  }
+
   static String selectWallpaper(DateTime utc8Time) {
+    if (debugWallpaperPath != null) {
+      return debugWallpaperPath!;
+    }
+
     final hour = utc8Time.hour;
-    final dayOfYear = utc8Time.difference(DateTime(utc8Time.year, 1, 1)).inDays + 1;
-    final random = math.Random(utc8Time.year * 365 + dayOfYear);
+    final dateHash = _hashDate(utc8Time);
+    final periodHash = hour >= 6 && hour < 18
+        ? 0
+        : (hour >= 18 && hour < 20 ? 1 : 2);
+    final combinedHash = (dateHash * 3 + periodHash) % 2147483647;
 
     if (hour >= 6 && hour < 18) {
-      return dayWallpapers[random.nextInt(dayWallpapers.length)];
+      final index = combinedHash % dayWallpapers.length;
+      return dayWallpapers[index];
     } else if (hour >= 18 && hour < 20) {
-      return duskWallpapers[random.nextInt(duskWallpapers.length)];
+      final index = combinedHash % duskWallpapers.length;
+      return duskWallpapers[index];
     } else {
-      return nightWallpapers[random.nextInt(nightWallpapers.length)];
+      final index = combinedHash % nightWallpapers.length;
+      return nightWallpapers[index];
     }
   }
 
@@ -47,4 +62,3 @@ class WallpaperSelector {
     return now.add(const Duration(hours: 8));
   }
 }
-