package com.siso.app.chat.ui;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Hashtable;
import java.util.List;

import com.easemob.chat.EMChatManager;
import com.easemob.chat.EMConversation;
import com.siso.app.chat.adapter.ChatAllHistoryAdapter;
import com.siso.app.chat.db.InviteMessgeDao;
import com.siso.app.ui.MyApplication;
import com.siso.app.ui.R;
import com.siso.app.ui.common.BaseActionBarActivity;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Pair;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;

public class ChatAllHistoryActivity extends BaseActionBarActivity {
	
	private InputMethodManager inputMethodManager;
	private ListView listView;
	private ChatAllHistoryAdapter adapter;
	public RelativeLayout errorItem;
	public TextView errorText;
	private boolean hidden;
	private List<EMConversation> conversationList = new ArrayList<EMConversation>();

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_chat_all_history);
		initToolbar(getStringByRId(R.string.title_activity_chat_all_history));
		
		if(savedInstanceState != null && savedInstanceState.getBoolean("isConflict", false))
            return;
		inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
		errorItem = (RelativeLayout) findViewById(R.id.rl_error_item);
		errorText = (TextView) errorItem.findViewById(R.id.tv_connect_errormsg);
		
		conversationList.addAll(loadConversationsWithRecentChat());
		listView = (ListView) findViewById(R.id.list);
		adapter = new ChatAllHistoryAdapter(this, 1, conversationList);
		// 设置adapter
		listView.setAdapter(adapter);
		
		final String st2 = getResources().getString(R.string.Cant_chat_with_yourself);
		listView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
				EMConversation conversation = adapter.getItem(position);
				String username = conversation.getUserName();
				if (username.equals(MyApplication.getInstance().getUserName()))
					Toast.makeText(ChatAllHistoryActivity.this, st2, 0).show();
				else {
				    // 进入聊天页面
				    Intent intent = new Intent(ChatAllHistoryActivity.this, ChatActivity.class);
				    if(conversation.isGroup()){
				        // it is group chat
                        intent.putExtra("chatType", ChatActivity.CHATTYPE_GROUP);
                        intent.putExtra("groupId", username);
				    }else{
				        // it is single chat
                        intent.putExtra("userId", username);
				    }
				    startActivity(intent);
				}
			}
		});
		// 注册上下文菜单
		registerForContextMenu(listView);

		listView.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// 隐藏软键盘
				hideSoftKeyboard();
				return false;
			}

		});
	}
	
	

	void hideSoftKeyboard() {
		if (getWindow().getAttributes().softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN) {
			if (getCurrentFocus() != null)
				inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),
						InputMethodManager.HIDE_NOT_ALWAYS);
		}
	}
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
		super.onCreateContextMenu(menu, v, menuInfo);
		// if(((AdapterContextMenuInfo)menuInfo).position > 0){ m,
		getMenuInflater().inflate(R.menu.delete_message, menu); 
		// }
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		boolean handled = false;
		boolean deleteMessage = false;
		if (item.getItemId() == R.id.delete_message) {
			deleteMessage = true;
			handled = true;
		} else if (item.getItemId() == R.id.delete_conversation) {
			deleteMessage = false;
			handled = true;
		}
		EMConversation tobeDeleteCons = adapter.getItem(((AdapterContextMenuInfo) item.getMenuInfo()).position);
		// 删除此会话
		EMChatManager.getInstance().deleteConversation(tobeDeleteCons.getUserName(), tobeDeleteCons.isGroup(), deleteMessage);
		InviteMessgeDao inviteMessgeDao = new InviteMessgeDao(this);
		inviteMessgeDao.deleteMessage(tobeDeleteCons.getUserName());
		adapter.remove(tobeDeleteCons);
		adapter.notifyDataSetChanged();

		// 更新消息未读数
//		updateUnreadLabel();
		
		return handled ? true : super.onContextItemSelected(item);
	}

	/**
	 * 刷新页面
	 */
	public void refresh() {
		conversationList.clear();
		conversationList.addAll(loadConversationsWithRecentChat());
		if(adapter != null)
		    adapter.notifyDataSetChanged();
	}
	
	/**
	 * 刷新未读消息数
	 */
//	public void updateUnreadLabel() {
//		int count = getUnreadMsgCountTotal();
//		if (count > 0) {
//			unreadLabel.setText(String.valueOf(count));
//			unreadLabel.setVisibility(View.VISIBLE);
//		} else {
//			unreadLabel.setVisibility(View.INVISIBLE);
//		}
//	}
	
	/**
	 * 获取未读消息数
	 * 
	 * @return
	 */
//	public int getUnreadMsgCountTotal() {
//		int unreadMsgCountTotal = 0;
//		unreadMsgCountTotal = EMChatManager.getInstance().getUnreadMsgsCount();
//		return unreadMsgCountTotal;
//	}

	/**
	 * 获取所有会话
	 * 
	 * @param context
	 * @return
+	 */
	private List<EMConversation> loadConversationsWithRecentChat() {
		// 获取所有会话，包括陌生人
		Hashtable<String, EMConversation> conversations = EMChatManager.getInstance().getAllConversations();
		// 过滤掉messages size为0的conversation
		/**
		 * 如果在排序过程中有新消息收到，lastMsgTime会发生变化
		 * 影响排序过程，Collection.sort会产生异常
		 * 保证Conversation在Sort过程中最后一条消息的时间不变 
		 * 避免并发问题
		 */
		List<Pair<Long, EMConversation>> sortList = new ArrayList<Pair<Long, EMConversation>>();
		synchronized (conversations) {
			for (EMConversation conversation : conversations.values()) {
				if (conversation.getAllMessages().size() != 0) {
					sortList.add(new Pair<Long, EMConversation>(conversation.getLastMessage().getMsgTime(), conversation));
				}
			}
		}
		try {
			// Internal is TimSort algorithm, has bug
			sortConversationByLastChatTime(sortList);
		} catch (Exception e) {
			e.printStackTrace();
		}
		List<EMConversation> list = new ArrayList<EMConversation>();
		for (Pair<Long, EMConversation> sortItem : sortList) {
			list.add(sortItem.second);
		}
		return list;
	}

	/**
	 * 根据最后一条消息的时间排序
	 * 
	 * @param usernames
	 */
	private void sortConversationByLastChatTime(List<Pair<Long, EMConversation>> conversationList) {
		Collections.sort(conversationList, new Comparator<Pair<Long, EMConversation>>() {
			@Override
			public int compare(final Pair<Long, EMConversation> con1, final Pair<Long, EMConversation> con2) {

				if (con1.first == con2.first) {
					return 0;
				} else if (con2.first > con1.first) {
					return 1;
				} else {
					return -1;
				}
			}

		});
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
//		refresh();
	}

	@Override
	public void onResume() {
		super.onResume();
		refresh();
	}

}