/*
 Created by ExoticDev on 2017-08-16
 */

import org.bukkit.entity.Player;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Reflection {

    public static Class<?> getClass(PackageType packageType, String className) {
        try {
            return Class.forName(packageType.getPath() + "." + className);
        } catch (Exception exception) {
            exception.printStackTrace();
        }

        return null;
    }

    public static Class<?> getChatSerializer() {
        Class<?> serializer = getClass(PackageType.MINECRAFT_SERVER, "IChatBaseComponent$ChatSerializer");

        Class<?> value = null;

        try {
            value = serializer.newInstance().getClass();
        } catch (InstantiationException | IllegalAccessException e) {
            e.printStackTrace();
        }

        return value;
    }

    public static Class<?> getIChatBaseComponent() {
        return getClass(PackageType.MINECRAFT_SERVER, "IChatBaseComponent");
    }

    public static Object getCraftPlayer(Player player) {
        try {
            return getMethod(player.getClass(), "getHandle").invoke(player);
        } catch (IllegalAccessException | InvocationTargetException e) {
            e.printStackTrace();
        }

        return null;
    }

    public static void sendPacket(Player player, Object packet) {
        Object nmsPlayer = getCraftPlayer(player);
        Object playerConnection = getFieldValue(nmsPlayer.getClass(), nmsPlayer, "playerConnection", false);

        try {
            getMethod(playerConnection.getClass(), "sendPacket", getClass(PackageType.MINECRAFT_SERVER, "Packet")).invoke(playerConnection, packet);
        } catch (IllegalAccessException | InvocationTargetException e) {
            e.printStackTrace();
        }
    }

    public static void sendPacket(Object nmsPlayer, Object packet) {
        try {
            Object playerConnection = getField(nmsPlayer.getClass(), "playerConnection", false).get(nmsPlayer);

            getMethod(playerConnection.getClass(), "sendPacket", getClass(PackageType.MINECRAFT_SERVER, "Packet")).invoke(playerConnection, packet);
        } catch (IllegalAccessException | InvocationTargetException e) {
            e.printStackTrace();
        }
    }

    public static Method getMethod(Class<?> clazz, String methodName, Class<?>... parameters) {
        try {
            return clazz.getMethod(methodName, parameters);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }

        return null;
    }

    public static Method getMethod(PackageType packageType, String clazz, String methodName, Class<?>... parameters) {
        try {
            return getClass(packageType, clazz).getMethod(methodName, parameters);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }

        return null;
    }

    public static Method getDeclaredMethod(Class<?> clazz, String methodName, Class<?>... parameters) {
        try {
            return clazz.getDeclaredMethod(methodName, parameters);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }

        return null;
    }


    public static Method getDeclaredMethod(PackageType packageType, String clazz, String methodName, Class<?>... parameters) {
        try {
            return getClass(packageType, clazz).getDeclaredMethod(methodName, parameters);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }

        return null;
    }

    public static Field getField(Class<?> clazz, String fieldName, boolean declared) {
        Field field;

        try {
            if(declared) {
                field = clazz.getDeclaredField(fieldName);
            } else {
                field = clazz.getField(fieldName);
            }

            return field;
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }

        return null;
    }

    public static Object getFieldValue(Class<?> clazz, Object object, String fieldName, boolean declared) {
        Field field;

        if(declared) {
            field = getField(clazz, fieldName, declared);

            field.setAccessible(true);
        } else {
            field = getField(clazz, fieldName, declared);
        }

        try {
            return field.get(object);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        return null;
    }

    public static void setFieldValue(Class<?> clazz, Object object, String fieldName, Object value, boolean declared) {
        Field field;

        try {
            if(declared) {
                field = clazz.getDeclaredField(fieldName);

                field.setAccessible(true);
            } else {
                field = clazz.getField(fieldName);
            }

            field.set(object, value);
        } catch (IllegalAccessException | NoSuchFieldException e) {
            e.printStackTrace();
        }
    }
}