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package com.taobao.weex.utils;

import android.text.TextUtils;
import com.alibaba.fastjson.JSON;
import com.taobao.weex.common.IWXObject;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.math.BigDecimal;

public class WXReflectionUtils {

  public static Object parseArgument(Type paramClazz, Object value){
    String originValue;
    if (value instanceof String) {
      originValue = (String) value;
    } else {
      originValue = JSON.toJSONString(value);
    }

    if (paramClazz == int.class) {
      return WXUtils.getInt(originValue);
    } else if (paramClazz == String.class) {
      return originValue;
    } else if (paramClazz == long.class) {
      return  WXUtils.getLong(originValue);
    } else if (paramClazz == double.class) {
      return WXUtils.getDouble(originValue);
    } else if (paramClazz == float.class) {
      return WXUtils.getFloat(originValue);
    } else if (ParameterizedType.class.isAssignableFrom(paramClazz.getClass())) {
      return JSON.parseObject(originValue, paramClazz);
    } else if (IWXObject.class.isAssignableFrom(paramClazz.getClass())) {
      return JSON.parseObject(originValue, paramClazz);
    } else {
      return JSON.parseObject(originValue, paramClazz);
    }
  }

  public static void setValue(Object obj, String fieldName, Object value) {
    if (obj == null || TextUtils.isEmpty(fieldName)) {
      return;
    }

    try {
      // Field field = obj.getClass().getDeclaredField(fieldName);
      Field field = getDeclaredField(obj, fieldName);

      Object realValue = value;
      if (value instanceof BigDecimal || value instanceof Number || value instanceof String) {
        if (field.getType() == Float.class || field.getType() == float.class) {
          realValue = Float.parseFloat(value.toString());
        } else if (field.getType() == Double.class || field.getType() == double.class) {
          realValue = Double.parseDouble(value.toString());
        } else if (field.getType() == Integer.class || field.getType() == int.class) {
          realValue = (int) Double.parseDouble(value.toString());
        } else if (field.getType() == Boolean.class || field.getType() == boolean.class) {
          realValue = Boolean.valueOf(value.toString());
        }
      }

      if (field.getType() == boolean.class || field.getType() == Boolean.class) {
        if (value != null) {
          realValue = Boolean.valueOf(value.toString());
        }
      }

      setProperty(obj, field, realValue);
    } catch (Exception e) {
      return;
    }
  }

  /**
   * get field form object and it's parent
   */
  public static Field getDeclaredField(Object object, String fieldName) {
    Field field = null;

    Class<?> clazz = object.getClass();

    for (; clazz != Object.class; clazz = clazz.getSuperclass()) {
      try {
        field = clazz.getDeclaredField(fieldName);
        return field;
      } catch (Exception e) {

      }
    }

    return null;
  }

  /**
   * Set property(field) of the specified object.
   * @param bean The object which has the given property
   * @param field The field to be set
   * @param value The value to be set to the field
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   * @throws NoSuchMethodException
   */
  public static void setProperty(Object bean, Field field, Object value) throws IllegalAccessException,
                                                                                InvocationTargetException,
                                                                                NoSuchMethodException {

    if (bean == null || field == null) {
      return;
    }

    try {
      field.setAccessible(true);
      field.set(bean, value);
    } catch (Exception e) {
    }

  }
}