package de.danoeh.antennapod.activity;

import android.graphics.LightingColorFilter;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Log;

import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.core.feed.Feed;
import de.danoeh.antennapod.core.glide.ApGlideSettings;
import de.danoeh.antennapod.core.glide.FastBlurTransformation;
import de.danoeh.antennapod.core.preferences.UserPreferences;
import de.danoeh.antennapod.core.storage.DBReader;
import de.danoeh.antennapod.fragment.FeedSettingsFragment;
import io.reactivex.Maybe;
import io.reactivex.MaybeOnSubscribe;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.disposables.Disposable;
import io.reactivex.schedulers.Schedulers;

/**
 * Displays information about a feed.
 */
public class FeedSettingsActivity extends AppCompatActivity {
    public static final String EXTRA_FEED_ID = "de.danoeh.antennapod.extra.feedId";
    private static final String TAG = "FeedSettingsActivity";
    private Feed feed;
    private Disposable disposable;
    private ImageView imgvCover;
    private TextView txtvTitle;
    private ImageView imgvBackground;
    private TextView txtvAuthorHeader;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setTheme(UserPreferences.getTheme());
        super.onCreate(savedInstanceState);
        setContentView(R.layout.feedsettings);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        long feedId = getIntent().getLongExtra(EXTRA_FEED_ID, -1);

        imgvCover = findViewById(R.id.imgvCover);
        txtvTitle = findViewById(R.id.txtvTitle);
        txtvAuthorHeader = findViewById(R.id.txtvAuthor);
        imgvBackground = findViewById(R.id.imgvBackground);
        findViewById(R.id.butShowInfo).setVisibility(View.INVISIBLE);
        findViewById(R.id.butShowSettings).setVisibility(View.INVISIBLE);
        // https://github.com/bumptech/glide/issues/529
        imgvBackground.setColorFilter(new LightingColorFilter(0xff828282, 0x000000));

        disposable = Maybe.create((MaybeOnSubscribe<Feed>) emitter -> {
                    Feed feed = DBReader.getFeed(feedId);
                    if (feed != null) {
                        emitter.onSuccess(feed);
                    } else {
                        emitter.onComplete();
                    }
                })
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(result -> {
                    feed = result;
                    showFragment();
                    showHeader();
                }, error -> {
                    Log.d(TAG, Log.getStackTraceString(error));
                    finish();
                }, () -> {
                    Log.e(TAG, "Activity was started with invalid arguments");
                    finish();
                });
    }

    private void showFragment() {
        FeedSettingsFragment fragment = new FeedSettingsFragment();
        fragment.setArguments(getIntent().getExtras());

        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction =
                fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.settings_fragment_container, fragment);
        fragmentTransaction.commit();
    }

    public Feed getFeed() {
        return feed;
    }

    private void showHeader() {
        txtvTitle.setText(feed.getTitle());

        if (!TextUtils.isEmpty(feed.getAuthor())) {
            txtvAuthorHeader.setText(feed.getAuthor());
        }

        Glide.with(FeedSettingsActivity.this)
                .load(feed.getImageLocation())
                .apply(new RequestOptions()
                        .placeholder(R.color.light_gray)
                        .error(R.color.light_gray)
                        .diskCacheStrategy(ApGlideSettings.AP_DISK_CACHE_STRATEGY)
                        .fitCenter()
                        .dontAnimate())
                .into(imgvCover);
        Glide.with(FeedSettingsActivity.this)
                .load(feed.getImageLocation())
                .apply(new RequestOptions()
                        .placeholder(R.color.image_readability_tint)
                        .error(R.color.image_readability_tint)
                        .diskCacheStrategy(ApGlideSettings.AP_DISK_CACHE_STRATEGY)
                        .transform(new FastBlurTransformation())
                        .dontAnimate())
                .into(imgvBackground);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (disposable != null) {
            disposable.dispose();
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                finish();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
}