package com.jiuqi.ui.widget;

import java.util.Set;

import com.jqyd.uilib.R;

import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;
import android.widget.TabWidget;
import android.widget.TextView;


public abstract class TabHostActivity extends TabActivity{

	private TabHost mTabHost;
	private TabWidget mTabWidget;
	private LayoutInflater mLayoutflater;

	private OnTabChangeListener MyOnTabChangeListener = new OnTabChangeListener(){

		@Override
		public void onTabChanged(String tabId){
			whenTabChanged(tabId);
		}
	};

	@Override
	protected void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		// set theme because we do not want the shadow
		setContentView(R.layout.njt_tab_host);

		mLayoutflater = getLayoutInflater();

		mTabHost = getTabHost();
		mTabHost.setOnTabChangedListener(MyOnTabChangeListener);
		mTabWidget = getTabWidget();
		mTabWidget.setStripEnabled(false); // need android2.2

		prepare();

		initTop();
		initTabSpec();
	}

	private void initTop(){
		View child = getTop();
		if(null != child){
			LinearLayout layout = (LinearLayout)findViewById(R.id.tab_top);
			layout.setVisibility(View.VISIBLE);
			layout.addView(child);
		}
	}

	private void initTabSpec(){

		Set<String> keys = getTabItemKeys();

		for(String key : keys){
			// set text view
			View tabItem = mLayoutflater.inflate(R.layout.njt_tab_item, null);
			if(tabItem instanceof TextView){
				TextView tvTabItem = (TextView)tabItem;
				//tabItem.findViewById(R.id.tab_item_tv)
				TabItem tab = getTabItemByTitle(key);
				// set tab spec
				setTabItemNormalState(tvTabItem, tab);
				TabSpec tabSpec = mTabHost.newTabSpec(tab.getTitle());
				tabSpec.setIndicator(tabItem);
				tabSpec.setContent(getTabItemIntent(tab));
				mTabHost.addTab(tabSpec);
			}
		}

	}

	/** 在初始化界面之前调用 */
	protected void prepare(){
		// do nothing or you override it
	}

	/** 自定义头部布局 */
	protected View getTop(){
		// do nothing or you override it
		return null;
	}

	protected int getTabCount(){
		return mTabHost.getTabWidget().getTabCount();
	}

	/** 设置TabItem的图标和标题等*/
	abstract protected void setTabItemNormalState(TextView textView, TabItem tab);

	abstract protected TabItem getTabItemByTitle(String key);

	abstract protected Intent getTabItemIntent(TabItem tab);

	abstract protected Set<String> getTabItemKeys();

	abstract protected void whenTabChanged(String tabTitle);

	protected void setCurrentTab(int index){
		mTabHost.setCurrentTab(index);
	}

	protected void focusCurrentTab(int index){
		mTabWidget.focusCurrentTab(index);
	}

}