package com.electric.chargingpile.activity;

import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;

import com.electric.chargingpile.R;
import com.electric.chargingpile.util.BarColorUtil;
import com.electric.chargingpile.view.HackyViewPager;

public class ImagePagerActivity extends FragmentActivity {
    private static final String STATE_POSITION = "STATE_POSITION";
    public static final String EXTRA_IMAGE_INDEX = "image_index";
    public static final String EXTRA_IMAGE_URLS = "image_urls";

    private HackyViewPager mPager;
    private int pagerPosition;
    private TextView indicator;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_image_pager);
        setStatusBarColor(ImagePagerActivity.this,R.color.black);


        pagerPosition = getIntent().getIntExtra(EXTRA_IMAGE_INDEX, 0);
        String[] urls = getIntent().getStringArrayExtra(EXTRA_IMAGE_URLS);


        mPager = (HackyViewPager) findViewById(R.id.pager);
        ImagePagerAdapter mAdapter = new ImagePagerAdapter(
                getSupportFragmentManager(), urls);
        mPager.setAdapter(mAdapter);
        indicator = (TextView) findViewById(R.id.indicator);

        CharSequence text = getString(R.string.viewpager_indicator, 1, mPager
                .getAdapter().getCount());
        indicator.setText(text);
        // 更新下标
        mPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override
            public void onPageScrollStateChanged(int arg0) {
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
            }

            @Override
            public void onPageSelected(int arg0) {
                CharSequence text = getString(R.string.viewpager_indicator,
                        arg0 + 1, mPager.getAdapter().getCount());
                indicator.setText(text);
            }

        });
        if (savedInstanceState != null) {
            pagerPosition = savedInstanceState.getInt(STATE_POSITION);
        }

        mPager.setCurrentItem(pagerPosition);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        outState.putInt(STATE_POSITION, mPager.getCurrentItem());
    }

    private class ImagePagerAdapter extends FragmentStatePagerAdapter {

        public String[] fileList;

        public ImagePagerAdapter(FragmentManager fm, String[] fileList) {
            super(fm);
            this.fileList = fileList;
        }

        @Override
        public int getCount() {
            return fileList == null ? 0 : fileList.length;
        }

        @Override
        public Fragment getItem(int position) {
            String url = fileList[position];
            return ImageDetailFragment.newInstance(url);
        }

    }


    public static void  setStatusBarColor(Activity activity, int colorId) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = activity.getWindow();
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(activity.getResources().getColor(colorId));
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            //使用SystemBarTint库使4.4版本状态栏变色，需要先将状态栏设置为透明
//            transparencyBar(activity);
//            SystemBarTintManager tintManager = new SystemBarTintManager(activity);
//            tintManager.setStatusBarTintEnabled(true);
//            tintManager.setStatusBarTintResource(colorId);
        }
    }


}