package tools;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import action.MyForm;

import config.MyBean;
import config.MyConfig;
import config.MyMap;
import exception.ActionHasError;
import exception.FormHasError;
import exception.ForwardHasError;

public class UtilTool {

	// 進行匹配
	public static MyForm InsertForm(HttpServletRequest request, MyConfig config)
			throws ActionHasError,FormHasError,ForwardHasError {
		String uri = request.getRequestURI();
		// 得到path
		String thePath = UtilTool.getRequestPath(uri);
		System.out.println(thePath);
		// 根據config,thePath 得到formClass 的名字
		String formClass = getFormClass(config, thePath);
		
		// 得到前臺組件的name集合
		List pelist = getParamElements(request);
		// 根據formClass得到該類的實例
		MyForm myform = null;
		try {
			System.out.println(formClass);
			myform = (MyForm) Class.forName(formClass).newInstance();
			
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println(222);
		// 開始填充對象
		return doInsert(request, pelist, myform);
	}

	// 得到path
	public static String getRequestPath(String uri) {
		String temp = uri.substring(uri.indexOf("/") + 1, uri.length());
		return temp.substring(temp.indexOf("/") , temp.length() - 3);
	}

	// 得到Form組件數組
	private static List getParamElements(HttpServletRequest request) {
		Enumeration enum = request.getParameterNames();
		List list = new ArrayList();
		while (enum.hasMoreElements()) {
			String e = (String) enum.nextElement();
			list.add(e);
		}
		return list;
	}

	private static MyForm doInsert(HttpServletRequest request, List pelist,
			MyForm myform)throws FormHasError{
	
		Field[] field = myform.getClass().getDeclaredFields();
	
		for (int i = 0; i < field.length; i++) {
			for (int j = 0; j < pelist.size(); j++) {
				String fieldstr = field[i].getName();
				String pestr = pelist.get(j).toString();
				
				if (fieldstr.equals(pestr)) {
					try {
						System.out.println("前臺組件名字:"+pestr);
						System.out.println(myform.toString());
						field[i].setAccessible(true);
						field[i].set(myform, request.getParameter(pestr));
					} catch (Exception e) {
						e.printStackTrace();
						throw new FormHasError();
					}
				}
			}
		}
		return myform;
	}

	private static String getFormClass(MyConfig config, String thePath) throws ActionHasError,FormHasError{
		MyMap[] mymap = config.getMymap();
		MyBean[] mybean = config.getMybean();
		System.out.println(mymap[0].getName());
		System.out.println(mymap[0].getType());
		System.out.println(mymap[0].getPath());
		System.out.println(mybean[0].getName());
		System.out.println(mybean[0].getType());
		System.out.println(thePath);
		System.out.println("-----------");
		for (int i = 0; i < mymap.length; i++) {
			if (thePath != null && thePath.equals(mymap[i].getPath())) {
				String formname = mymap[i].getName();
				for (int j = 0; j < mybean.length; j++) {
					if (formname != null && formname.equals(mybean[j].getName())) {
						String formclass = mybean[j].getType();
						System.out.println(111);
						return formclass;
					}
				}
			} 
		}
		return null;
	}
}