set closet vanilla vaule horizontalCoefficient config base on folia or paper

build.gradle

@@ -3,7 +3,7 @@ plugins {
 }
 
 group = 'xyz.hynse'
-version = "2.1"
+version = "2.2"
 
 repositories {
     mavenCentral()
@@ -37,7 +37,7 @@ processResources {
     def props = [version: version]
     inputs.properties props
     filteringCharset 'UTF-8'
-    filesMatching(['plugin.yml', 'paper-plugin.yml']) {
+    filesMatching('plugin.yml') {
         expand props
     }
 }

src/main/java/xyz/hynse/foliaflow/FoliaFlow.java

@@ -1,12 +1,19 @@
 package xyz.hynse.foliaflow;
 
+import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import xyz.hynse.foliaflow.command.ReloadCommand;
+import xyz.hynse.foliaflow.util.SchedulerUtil;
 import xyz.hynse.foliaflow.watcher.PortalWatcher;
 
-public class FoliaFlow extends JavaPlugin {
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 
+public class FoliaFlow extends JavaPlugin {
+    private boolean isFirstEnable = true;
     public static FoliaFlow instance;
     public static double horizontalCoefficient;
     public static double verticalCoefficient;
@@ -17,9 +24,40 @@ public class FoliaFlow extends JavaPlugin {
     public void onEnable() {
         instance = this;
         register();
+        if (isFirstEnable) {
+            isFirstEnable = false;
+            copyDefaultConfig();
+            setInitialConfigValues();
+        }
         reload();
     }
 
+    private void copyDefaultConfig() {
+        File configFile = new File(getDataFolder(), "config.yml");
+        if (!configFile.exists()) {
+            saveResource("config.yml", false);
+        }
+    }
+
+    private void setInitialConfigValues() {
+        File configFile = new File(getDataFolder(), "config.yml");
+        YamlConfiguration config = YamlConfiguration.loadConfiguration(configFile);
+        InputStream defaultConfigStream = getResource("config.yml");
+        YamlConfiguration defaultConfig = YamlConfiguration.loadConfiguration(new InputStreamReader(defaultConfigStream));
+        config.options().copyDefaults(true);
+        config.setDefaults(defaultConfig);
+        boolean isFolia = SchedulerUtil.isFolia();
+        if (!config.contains("horizontal_coefficient")) {
+            double horizontalCoefficient = isFolia ? 1.499 : 1.3;
+            config.set("horizontal_coefficient", horizontalCoefficient);
+        }
+        try {
+            config.save(configFile);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
     public void reload() {
         saveDefaultConfig();
         reloadConfig();

src/main/resources/config.yml

@@ -3,7 +3,10 @@
 # If you find values that seems more vanilla please create a PR
 # https://github.com/Hynse/FoliaFlow
 
+# Optimize value for horizontal_coefficient
+#  - Folia (1.499)
+#  - Paper (1.3)
+horizontal_coefficient: 1.499
 vertical_coefficient: -1.7
-horizontal_coefficient: 1.46
 spawn_height: 0.08
-folia_offset: 0.08
+folia_offset: 0.5