import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;


public class KPref {

  enum KDataType {

    String(1),
    Boolean(2),
    Float(3),
    Integer(4),
    Long(5);

    private int value;

    private KDataType(int value) {
      this.value = value;
    }

    public int getValue() {
      return value;
    }
  }

  public <T extends String> void saveItem(T key, Object value, Context context) {
    SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(context)
        .edit();

    if (value instanceof String) {
      editor.putString(key, (String) value);
      editor.putInt(key+"_", KDataType.String.getValue());
    }
    if (value instanceof Boolean) {
      editor.putBoolean(key, (Boolean) value);
      editor.putInt(key+"_", KDataType.Boolean.getValue());
    }
    if (value instanceof Float) {
      editor.putFloat(key, (Float) value);
      editor.putInt(key+"_", KDataType.Float.getValue());
    }
    if (value instanceof Integer) {
      editor.putInt(key, (Integer) value);
      editor.putInt(key+"_", KDataType.Integer.getValue());
    }
    if (value instanceof Long) {
      editor.putLong(key, (Long) value);
      editor.putInt(key+"_", KDataType.Long.getValue());
    }

    editor.apply();
  }

  public <T extends String> Object getItem(T key, Context context) {
    Integer valueType = PreferenceManager.getDefaultSharedPreferences(context).getInt(key+"_", 0);

    if (KDataType.Boolean.getValue() == valueType) {
      return PreferenceManager.getDefaultSharedPreferences(context).getBoolean(key, false);
    }
    if (KDataType.Integer.getValue() == valueType) {
      return PreferenceManager.getDefaultSharedPreferences(context).getInt(key, 0);
    }
    if (KDataType.Float.getValue() == valueType) {
      return PreferenceManager.getDefaultSharedPreferences(context).getFloat(key, 0);
    }
    if (KDataType.Long.getValue() == valueType) {
      return PreferenceManager.getDefaultSharedPreferences(context).getLong(key, 0);
    }
    if (KDataType.String.getValue() == valueType) {
      return PreferenceManager.getDefaultSharedPreferences(context).getString(key, "");
    }
    IllegalStateException exception = new IllegalStateException("Variable is not recognised");
    throw exception;

  }

}