package com.shuivy.happylendandreadbooks.fragment;

import android.app.Activity;

import android.app.Fragment;

import android.os.Bundle;

import android.os.Handler;

import android.support.v4.view.ViewPager;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import com.shuivy.happylendandreadbooks.R;

import com.shuivy.happylendandreadbooks.adapter.MyViewPagerAdapter;

import java.util.ArrayList;

import java.util.List;

/**

 * Created by stk on 2016/7/22 0022.

 */

public class HomeFragment extends Fragment {

    private View mRootView;

    private Activity mContext;

    private LayoutInflater mLayoutInflater;

    private int[] mImageIdArray;

    private static final int TIME = 1700;

    private List<View> mLayouts;

    private List<View> mDots;

    private ViewPager mViewPager;

    private int mCount = 3;

    private Handler mHandler = new Handler();

    private int itemPosition;

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        mContext = getActivity();

        if (mRootView == null) {

            mRootView = inflater.inflate(R.layout.fragment_home, container, false);

            mLayoutInflater = inflater;

            initView();

        } else {

            ViewGroup parent = (ViewGroup) mRootView.getParent();

            if (parent != null) {

                parent.removeView(mRootView);

            }

        }

        return mRootView;

    }

    private void initView() {

        mImageIdArray = new int[]{

                R.mipmap.book_viewpager1,

                R.mipmap.book_viewpager2,

                R.mipmap.book_viewpager3,

        };

        TextView textView = (TextView) mRootView.findViewById(R.id.titleView);

        textView.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                mViewPager.setCurrentItem(1);

            }

        });

        initIndex();

    }

    private void initIndex() {

        viewPager();

        mHandler.postDelayed(runnableForViewPager, TIME);

    }

    /**

     * 首页上方的viewpager图片展示

     */

    private void viewPager() {

        ViewGroup viewGroup = (ViewGroup) mRootView.findViewById(R.id.viewGroup);

        mViewPager = (ViewPager) mRootView.findViewById(R.id.viewPager);

        //mCount是订单数量，是从订单处得到的数据，我们默认设为3

        mLayouts = new ArrayList<>();

        mDots = new ArrayList<>();

        for (int i = 0; i < mCount; i++) {

            //下面两句必须放在for里面

            View layoutView = mLayoutInflater.inflate(R.layout.viewpager_item, null);

            View dotView = mLayoutInflater.inflate(R.layout.dot, null);

            ImageView imageView = (ImageView) layoutView.findViewById(R.id.viewpager_image);

            imageView.setImageResource(mImageIdArray[i]);

            if (i == 0) {

                dotView.setBackgroundResource(R.drawable.dot_select);

            } else {

                dotView.setBackgroundResource(R.drawable.dot_no_select);

            }

            LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(

                    new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,

                            ViewGroup.LayoutParams.WRAP_CONTENT));

            layoutParams.setMargins(20, 0, 20, 0);

            viewGroup.addView(dotView, layoutParams);

            mLayouts.add(layoutView);

            mDots.add(dotView);

        }

        mViewPager.setAdapter(new MyViewPagerAdapter(mLayouts));

        mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override

            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override

            public void onPageSelected(int position) {

                for (int i = 0; i < mCount; i++) {

                    if (i == position) {

                        mDots.get(i).setBackgroundResource(R.drawable.dot_select);

                    } else {

                        mDots.get(i).setBackgroundResource(R.drawable.dot_no_select);

                    }

                }

            }

            @Override

            public void onPageScrollStateChanged(int state) {

            }

        });

    }

    /**

     * ViewPager的定时器

     */

    Runnable runnableForViewPager = new Runnable() {

        @Override

        public void run() {

            try {

                itemPosition++;

                mHandler.postDelayed(this, TIME);

                mViewPager.setCurrentItem(itemPosition % mCount);

            } catch (Exception e) {

                e.printStackTrace();

            }

        }

    };

}