package com.android.example;

import java.lang.reflect.Array;
import java.lang.reflect.Field;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class MyJSONParser {

    public static Object populateObjectFromJSON(Class<?> classname, JSONObject js) {
		Object obj = null;
		System.out.println("Populating " + classname.getSimpleName()+ " -with- " + js.toString());
		try {
			obj = classname.newInstance();
		} catch (InstantiationException e1) {
			System.err.println(e1.getMessage());
			return null;
		} catch (IllegalAccessException e1) {
			System.err.println(e1.getMessage());
			return null;
		}

		Field[] fields = classname.getFields();
		for (Field f : fields) {
			try {
				if (js.has(f.getName())) {
						String type = f.getType().getSimpleName();
					if (type.equalsIgnoreCase("boolean")) {
						f.setBoolean(obj, js.getBoolean(f.getName()));
					} else if (type.equalsIgnoreCase("int")) {
						f.setInt(obj, js.getInt(f.getName()));
					} else if (type.equalsIgnoreCase("double")) {
						f.setDouble(obj, js.getDouble(f.getName()));
					} else if (type.equalsIgnoreCase("float")) {
						f.setFloat(obj, (float) js.getDouble(f.getName()));
					} else if (type.equalsIgnoreCase("string")) {
						f.set(obj, js.getString(f.getName()));
					} else if (f.getType().isArray()) {
						// System.out.println("This is an ARRAY: " + f.getName());
						insertArrayFromJSON(obj, f, js.getJSONArray(f.getName()));
					} else {
						f.set(obj,populateObjectFromJSON(f.getType(),js.getJSONObject(f.getName())));
					}
				}
			} catch (IllegalArgumentException e) {
				System.err.println(e.getMessage());
			} catch (IllegalAccessException e) {
				System.err.println(e.getMessage());
			} catch (JSONException e) {
				System.err.println(e.getMessage());
			}
		}

		return obj;
    }

    public static void insertArrayFromJSON(Object obj, Field f, JSONArray js, int pos) throws IllegalArgumentException, NegativeArraySizeException, IllegalAccessException, JSONException {
		f.set(obj,Array.newInstance(f.getType().getComponentType(), js.length()));
		String type = f.getType().getComponentType().getSimpleName();
		
		for (int i = 0; i < js.length(); i++) {
			if (f.getType().getComponentType().isArray()) {
				System.out.println("An array!! " + f.getName());
				//TO-DO
			} else if (!f.getType().getComponentType().isPrimitive()&& (!type.equalsIgnoreCase("string"))) {
				//System.out.println(f.getType().getSimpleName() + " isn't primitive " + f.getName());
				Array.set(f.get(obj),i,populateObjectFromJSON(f.getType().getComponentType(),js.getJSONObject(i)));
				//Array.set(f.get(obj),i,populateObjectFromJSON(f.getType().getComponentType(), new JSONObject(js.getJSONArray(i).toString())));
			} else {
				//Primitive
				Array.set(f.get(obj), i, js.get(i));
			}
		}
	}
    
    public static JSONObject parseObjectToJSONClass(Object obj) {JSONObject js = new JSONObject();
		Class<?> c = obj.getClass();
		Field[] fields = c.getFields();

		for (Field f : fields) {
			try {
			System.out.println(f.getName() + " - "+ f.getType().getSimpleName() + " - " + f.get(obj));

			String name = f.getName();
			String type = f.getType().getSimpleName();
			if (f.get(obj) != null) {
				if (type.equalsIgnoreCase("boolean")) {
					js.put(name, f.getBoolean(obj));
				} else if (type.equalsIgnoreCase("int")) {
					js.put(name, f.getInt(obj));
				} else if (type.equalsIgnoreCase("double")) {
					js.put(name, f.getDouble(obj));
				} else if (type.equalsIgnoreCase("float")) {
					js.put(name, f.getFloat(obj));
				} else if (type.equalsIgnoreCase("string")) {
					js.put(name, (String) f.get(obj));
				} else if (type.endsWith("]")) {
					JSONArray ar = new JSONArray();
					for (int i = 0; i < Array.getLength(f.get(obj)); i++) {
						ar.put(i, Array.get(f.get(obj), i));
					}
					js.put(name, ar);
				} else {
				js.put(name, parseObjectToJSONClass(f.get(obj)));
				}
			}
			} catch (IllegalArgumentException e) {
			System.err.println(e.getMessage());
			} catch (IllegalAccessException e) {
			System.err.println(e.getMessage());
			} catch (JSONException e) {
			System.err.println(e.getMessage());
			}
		}
		return js;
    }
}