the_big_one/src/main/java/jesse/keeblarcraft/ConfigMgr/GeneralConfig.java

package jesse.keeblarcraft.ConfigMgr;

import java.util.ArrayList;
import java.util.List;

import jesse.keeblarcraft.Utils.DirectionalVec;
import jesse.keeblarcraft.Utils.CustomExceptions.FILE_WRITE_EXCEPTION;

public class GeneralConfig {
    private static GeneralConfig static_inst;
    ConfigManager cfgMgr = new ConfigManager();
    private ImplementedConfig config;

    public static GeneralConfig GetInstance() {
        if (static_inst == null) {
            static_inst = new GeneralConfig();
        }

        return static_inst;
    }

    // Guarentee to not be null
    public ImplementedConfig GetConfig() {
        if (config == null) {
            config = new ImplementedConfig();
            FlashConfig();
        }

        return config;
    }

    public GeneralConfig() {
        Boolean existingFile = false;
        try {
            config = cfgMgr.GetJsonObjectFromFile("general.json", ImplementedConfig.class);

            System.out.println("Read in config. Random value: " + config.global_spawn.x);
            existingFile = true;
        } catch(Exception e) {
            System.out.println("FAILED TO READ IN GENERALCONFIG");
            e.printStackTrace();
        }

        if (!existingFile) {
            config = new ImplementedConfig();
            FlashConfig();
        }

        if (config == null) {
            config = new ImplementedConfig();
            FlashConfig();
        }
    }

    // Can return null; if null then do not spawn the player because global spawn wasn't set!
    public DirectionalVec GetSpawnCoords() {
        System.out.println("GetSpawnCoords called. is global_spawn null? " + (config.global_spawn == null ? "YES": "NO"));
        return config.global_spawn;
    }

    public void SetSpawnCoords(DirectionalVec vec) {
        config.global_spawn = vec;
        FlashConfig();
    }

    // The idea behind this function is a one time check option. If you have the UUID, they must now be joining
    // so we wrap adding them to the list in one check
    public Boolean IsNewPlayer(String uuid) {
        System.out.println("IsNewPlayer called. List has: " + config.playerList);
        Boolean isNew = !config.playerList.contains(uuid);

        System.out.println("Value of isNew is " + isNew);

        if (isNew) {
            config.playerList.add(uuid);
            FlashConfig();
        }
        return isNew;
    }

    public String GetMOTD() {
        return config.MOTD;
    }

    private class ImplementedConfig {
        public String MOTD = "Welcome to the server! Have fun!";

        // This is lazy, but this will fill with every unique UUID that has joined the server. This is how I am checking
        // to see if a player has just joined the server for a first time or not
        public List<String> playerList = new ArrayList<>();
        DirectionalVec global_spawn;
    }

    private void FlashConfig() {
        System.out.println("Attempting to write generalconfig to file. Is null? " + (config == null ? "YES" : "NO"));
        try {
            cfgMgr.WriteToJsonFile("general.json", config);
        } catch (FILE_WRITE_EXCEPTION e) {
            System.out.println("Caught FileWriteException from general config writing. uh oh!");
        }
    }
}