package me.skymc.taboolib.nms;

import org.bukkit.Bukkit;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

public class NMSUtils {

    public static Class<?> c = getOBCClass("block.CraftBlock");
    public static Method m = getMethodSilent(c, "getNMSBlock");

    public static String getVersion() {
        String name = Bukkit.getServer().getClass().getPackage().getName();
        return name.substring(name.lastIndexOf('.') + 1) + ".";
    }

    public static Class<?> getClassWithException(String name) throws Exception {
        return Class.forName(name);
    }

    public static Class<?> getClass(String name) {
        try {
            return getClassWithException(name);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static Class<?> getClass(String... strings) {
        for (String s : strings) {
            try {
                return getClassWithException(s);
            } catch (Exception ignored) {
            }
        }
        return null;
    }

    public static Class<?> getClassSilent(String name) {
        try {
            return getClassWithException(name);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Class<?> getNMSClassWithException(String className) throws Exception {
        return Class.forName("net.minecraft.server." + getVersion() + className);
    }

    public static Class<?> getNMSClass(String className) {
        try {
            return getNMSClassWithException(className);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Class<?> getNMSClassSilent(String className) {
        try {
            return getNMSClassWithException(className);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Class<?> getNMSClass(String className, String embedded) {
        try {
            return getNMSClassWithException(className);
        } catch (Exception e) {
            return getInnerClassSilent(getNMSClassSilent(embedded), className);
        }
    }

    public static Class<?> getNMSClassSilent(String className, String embedded) {
        try {
            return getNMSClassWithException(className);
        } catch (Exception e) {
            return getInnerClassSilent(getNMSClassSilent(embedded), className);
        }
    }

    public static Class<?> getOBCClassWithException(String className) throws Exception {
        return Class.forName("org.bukkit.craftbukkit." + getVersion() + className);
    }

    public static Class<?> getOBCClass(String className) {
        try {
            return getOBCClassWithException(className);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Class<?> getOBCClassSilent(String className) {
        try {
            return getOBCClassWithException(className);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Object getHandle(Object obj) {
        try {
            return getMethodWithException(obj.getClass(), "getHandle").invoke(obj);
        } catch (Exception ignored) {
            return null;
        }
    }

    public static Object getHandleSilent(Object obj) {
        try {
            return getMethodWithException(obj.getClass(), "getHandle").invoke(obj);
        } catch (Exception e) {
            return null;
        }
    }

    public static Object getBlockHandleWithException(Object obj) throws Exception {
        return m.invoke(obj);
    }

    public static Object getBlockHandle(Object obj) {
        try {
            return m.invoke(obj);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Object getBlockHandleSilent(Object obj) {
        try {
            return m.invoke(obj);
        } catch (Exception e) {
            return null;
        }
    }

    public static Field getFieldWithException(Class<?> clazz, String name) throws Exception {
        for (Field field : clazz.getDeclaredFields())
            if (field.getName().equals(name)) {
                field.setAccessible(true);
                Field modifiersField = Field.class.getDeclaredField("modifiers");
                modifiersField.setAccessible(true);
                int modifiers = modifiersField.getInt(field);
                modifiers &= ~Modifier.FINAL;
                modifiersField.setInt(field, modifiers);
                return field;
            }
        for (Field field : clazz.getFields())
            if (field.getName().equals(name)) {
                field.setAccessible(true);
                Field modifiersField = Field.class.getDeclaredField("modifiers");
                modifiersField.setAccessible(true);
                int modifiers = modifiersField.getInt(field);
                modifiers &= ~Modifier.FINAL;
                modifiersField.setInt(field, modifiers);
                return field;
            }
        throw new Exception("Field Not Found");
    }

    public static Field getFieldSilent(Class<?> clazz, String... names) {
        for (String name : names) {
            try {
                return getFieldWithException(clazz, name);
            } catch (Exception ignored) {
            }
        }
        return null;
    }

    public static Field getFieldSilent(Class<?> clazz, String name) {
        try {
            return getFieldWithException(clazz, name);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Field getField(Class<?> clazz, String... names) {
        for (String name : names) {
            try {
                return getFieldWithException(clazz, name);
            } catch (Exception ignored) {
            }
        }
        return null;
    }

    public static Field getFieldOfTypeWithException(Class<?> clazz, Class<?> type, String name) throws Exception {
        for (Field field : clazz.getDeclaredFields())
            if (field.getName().equals(name) && field.getType().equals(type)) {
                field.setAccessible(true);
                Field modifiersField = Field.class.getDeclaredField("modifiers");
                modifiersField.setAccessible(true);
                int modifiers = modifiersField.getInt(field);
                modifiers &= ~Modifier.FINAL;
                modifiersField.setInt(field, modifiers);
                return field;
            }
        for (Field field : clazz.getFields())
            if (field.getName().equals(name) && field.getType().equals(type)) {
                field.setAccessible(true);
                Field modifiersField = Field.class.getDeclaredField("modifiers");
                modifiersField.setAccessible(true);
                int modifiers = modifiersField.getInt(field);
                modifiers &= ~Modifier.FINAL;
                modifiersField.setInt(field, modifiers);
                return field;
            }
        throw new Exception("Field Not Found");
    }

    public static Field getFieldOfType(Class<?> clazz, Class<?> type, String name) {
        try {
            return getFieldOfTypeWithException(clazz, type, name);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static Field getFirstFieldOfTypeWithException(Class<?> clazz, Class<?> type) throws Exception {
        for (Field field : clazz.getDeclaredFields()) {
            if (field.getType().equals(type)) {
                field.setAccessible(true);
                Field modifiersField = Field.class.getDeclaredField("modifiers");
                modifiersField.setAccessible(true);
                int modifiers = modifiersField.getInt(field);
                modifiers &= ~Modifier.FINAL;
                modifiersField.setInt(field, modifiers);
                return field;
            }
        }
        throw new Exception("Field Not Found");
    }

    public static Field getFirstFieldOfType(Class<?> clazz, Class<?> type) {
        try {
            return getFirstFieldOfTypeWithException(clazz, type);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static Field getLastFieldOfTypeWithException(Class<?> clazz, Class<?> type) throws Exception {
        Field field = null;
        for (Field f : clazz.getDeclaredFields())
            if (f.getType().equals(type)) {
                field = f;
            }
        if (field == null) {
            throw new Exception("Field Not Found");
        }
        field.setAccessible(true);
        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        int modifiers = modifiersField.getInt(field);
        modifiers &= ~Modifier.FINAL;
        modifiersField.setInt(field, modifiers);
        return field;
    }

    public static Field getLastFieldOfType(Class<?> clazz, Class<?> type) {
        try {
            return getLastFieldOfTypeWithException(clazz, type);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static Method getMethodWithException(Class<?> clazz, String name, Class<?>... args) throws Exception {
        for (Method m : clazz.getDeclaredMethods())
            if (m.getName().equals(name) && (args.length == 0 && m.getParameterTypes().length == 0 || ClassListEqual(args, m.getParameterTypes()))) {
                m.setAccessible(true);
                return m;
            }
        for (Method m : clazz.getMethods())
            if (m.getName().equals(name) && (args.length == 0 && m.getParameterTypes().length == 0 || ClassListEqual(args, m.getParameterTypes()))) {
                m.setAccessible(true);
                return m;
            }
        throw new Exception("Method Not Found");
    }

    public static Method getMethodSilent(Class<?> clazz, String name, Class<?>... args) {
        try {
            return getMethodWithException(clazz, name, args);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static boolean ClassListEqual(Class<?>[] l1, Class<?>[] l2) {
        if (l1.length != l2.length)
            return false;
        for (int i = 0; i < l1.length; i++)
            if (l1[i] != l2[i])
                return false;
        return true;
    }

    public static Class<?> getInnerClassWithException(Class<?> c, String className) throws Exception {
        for (Class<?> cl : c.getDeclaredClasses())
            if (cl.getSimpleName().equals(className))
                return cl;
        throw new Exception("Inner Class Not Found");
    }

    public static Class<?> getInnerClass(Class<?> c, String className) {
        try {
            return getInnerClassWithException(c, className);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static Class<?> getInnerClassSilent(Class<?> c, String className) {
        try {
            return getInnerClassWithException(c, className);
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Constructor<?> getConstructor(Class<?> clazz, Class<?>... args) throws Exception {
        for (Constructor<?> c : clazz.getDeclaredConstructors())
            if (args.length == 0 && c.getParameterTypes().length == 0 || ClassListEqual(args, c.getParameterTypes())) {
                c.setAccessible(true);
                return c;
            }
        for (Constructor<?> c : clazz.getConstructors())
            if (args.length == 0 && c.getParameterTypes().length == 0 || ClassListEqual(args, c.getParameterTypes())) {
                c.setAccessible(true);
                return c;
            }
        throw new Exception("Constructor Not Found");
    }

    public static Constructor<?> getConstructorSilent(Class<?> clazz, Class<?>... args) {
        try {
            return getConstructor(clazz, args);
        } catch (Exception ignored) {
        }
        return null;
    }

    @SuppressWarnings({"unchecked", "rawtypes"})
    public static Enum<?> getEnum(final String value, final Class enumClass) {
        return Enum.valueOf(enumClass, value);
    }
}