/*
 * Copyright 2015 Synced Synapse. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.xbmc.kore.ui;

import android.content.Intent;
import android.content.res.Resources;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.GridLayout;
import android.widget.ImageView;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;

import org.xbmc.kore.R;
import org.xbmc.kore.Settings;
import org.xbmc.kore.host.HostInfo;
import org.xbmc.kore.host.HostManager;
import org.xbmc.kore.jsonrpc.ApiException;
import org.xbmc.kore.jsonrpc.event.MediaSyncEvent;
import org.xbmc.kore.jsonrpc.type.VideoType;
import org.xbmc.kore.provider.MediaContract;
import org.xbmc.kore.service.LibrarySyncService;
import org.xbmc.kore.utils.LogUtils;
import org.xbmc.kore.utils.UIUtils;

import java.lang.System;
import java.util.ArrayList;
import java.util.List;

import butterknife.ButterKnife;
import butterknife.InjectView;
import de.greenrobot.event.EventBus;

/**
 * Presents a TV Show overview
 */
public class TVShowOverviewFragment extends Fragment
        implements LoaderManager.LoaderCallbacks<Cursor>,
        SwipeRefreshLayout.OnRefreshListener {
    private static final String TAG = LogUtils.makeLogTag(TVShowOverviewFragment.class);

    public static final String TVSHOWID = "tvshow_id";

    // Loader IDs
    private static final int LOADER_TVSHOW = 0,
            LOADER_CAST = 1;

    private HostManager hostManager;
    private HostInfo hostInfo;
    private EventBus bus;

    // Displayed movie id
    private int tvshowId = -1;

    // Controls whether a automatic sync refresh has been issued for this show
    private static boolean hasIssuedOutdatedRefresh = false;

    @InjectView(R.id.swipe_refresh_layout) SwipeRefreshLayout swipeRefreshLayout;

//    // Buttons
//    @InjectView(R.id.go_to_imdb) ImageButton imdbButton;

    // Detail views
    @InjectView(R.id.media_panel) ScrollView mediaPanel;

    @InjectView(R.id.art) ImageView mediaArt;
    @InjectView(R.id.poster) ImageView mediaPoster;

    @InjectView(R.id.media_title) TextView mediaTitle;
    @InjectView(R.id.media_undertitle) TextView mediaUndertitle;

    @InjectView(R.id.rating) TextView mediaRating;
    @InjectView(R.id.max_rating) TextView mediaMaxRating;
    @InjectView(R.id.premiered) TextView mediaPremiered;
    @InjectView(R.id.genres) TextView mediaGenres;

    @InjectView(R.id.media_description) TextView mediaDescription;
    @InjectView(R.id.cast_list) GridLayout videoCastList;
    @InjectView(R.id.additional_cast_list) TextView videoAdditionalCastList;
    @InjectView(R.id.additional_cast_title) TextView videoAdditionalCastTitle;

    /**
     * Create a new instance of this, initialized to show tvshowId
     */
    public static TVShowOverviewFragment newInstance(int tvshowId) {
        TVShowOverviewFragment fragment = new TVShowOverviewFragment();

        Bundle args = new Bundle();
        args.putInt(TVSHOWID, tvshowId);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        tvshowId = getArguments().getInt(TVSHOWID, -1);

        if ((container == null) || (tvshowId == -1)) {
            // We're not being shown or there's nothing to show
            return null;
        }

        ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_tvshow_overview, container, false);
        ButterKnife.inject(this, root);

        bus = EventBus.getDefault();
        hostManager = HostManager.getInstance(getActivity());
        hostInfo = hostManager.getHostInfo();

        swipeRefreshLayout.setOnRefreshListener(this);
        //UIUtils.setSwipeRefreshLayoutColorScheme(swipeRefreshLayout);

        // Setup dim the fanart when scroll changes. Full dim on 4 * iconSize dp
        Resources resources = getActivity().getResources();
        final int pixelsToTransparent  = 4 * resources.getDimensionPixelSize(R.dimen.default_icon_size);
        mediaPanel.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                float y = mediaPanel.getScrollY();
                float newAlpha = Math.min(1, Math.max(0, 1 - (y / pixelsToTransparent)));
                mediaArt.setAlpha(newAlpha);
            }
        });

        // Pad main content view to overlap with bottom system bar
//        UIUtils.setPaddingForSystemBars(getActivity(), mediaPanel, false, false, true);
//        mediaPanel.setClipToPadding(false);

        return root;
    }

    @Override
    public void onActivityCreated (Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        hasIssuedOutdatedRefresh = false;

        // Start the loaders
        getLoaderManager().initLoader(LOADER_TVSHOW, null, this);
        getLoaderManager().initLoader(LOADER_CAST, null, this);

        setHasOptionsMenu(false);
    }

    @Override
    public void onResume() {
        bus.register(this);
        super.onResume();
    }

    @Override
    public void onPause() {
        bus.unregister(this);
        super.onPause();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
//        outState.putInt(TVSHOWID, tvshowId);
    }

    /**
     * Swipe refresh layout callback
     */
    /** {@inheritDoc} */
    @Override
    public void onRefresh () {
        if (hostInfo != null) {
            // Start the syncing process
            startSync(false);
        } else {
            swipeRefreshLayout.setRefreshing(false);
            Toast.makeText(getActivity(), R.string.no_xbmc_configured, Toast.LENGTH_SHORT)
                 .show();
        }
    }

    private void startSync(boolean silentRefresh) {
        Intent syncIntent = new Intent(this.getActivity(), LibrarySyncService.class);
        syncIntent.putExtra(LibrarySyncService.SYNC_SINGLE_TVSHOW, true);
        syncIntent.putExtra(LibrarySyncService.SYNC_TVSHOWID, tvshowId);

        Bundle syncExtras = new Bundle();
        syncExtras.putBoolean(LibrarySyncService.SILENT_SYNC, silentRefresh);
        syncIntent.putExtra(LibrarySyncService.SYNC_EXTRAS, syncExtras);

        getActivity().startService(syncIntent);
    }

    /**
     * Event bus post. Called when the syncing process ended
     *
     * @param event Refreshes data
     */
    public void onEventMainThread(MediaSyncEvent event) {
        boolean silentSync = false;
        if (event.syncExtras != null) {
            silentSync = event.syncExtras.getBoolean(LibrarySyncService.SILENT_SYNC, false);
        }

        if (event.syncType.equals(LibrarySyncService.SYNC_SINGLE_TVSHOW) ||
            event.syncType.equals(LibrarySyncService.SYNC_ALL_TVSHOWS)) {
            swipeRefreshLayout.setRefreshing(false);
            if (event.status == MediaSyncEvent.STATUS_SUCCESS) {
                getLoaderManager().restartLoader(LOADER_TVSHOW, null, this);
                getLoaderManager().restartLoader(LOADER_CAST, null, this);
                if (!silentSync) {
                    Toast.makeText(getActivity(),
                            R.string.sync_successful, Toast.LENGTH_SHORT)
                         .show();
                }
            } else if (!silentSync) {
                String msg = (event.errorCode == ApiException.API_ERROR) ?
                             String.format(getString(R.string.error_while_syncing), event.errorMessage) :
                             getString(R.string.unable_to_connect_to_xbmc);
                Toast.makeText(getActivity(), msg, Toast.LENGTH_SHORT).show();
            }
        }
    }

    /**
     * Loader callbacks
     */
    /** {@inheritDoc} */
    @Override
    public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
        Uri uri;
        switch (i) {
            case LOADER_TVSHOW:
                uri = MediaContract.TVShows.buildTVShowUri(hostInfo.getId(), tvshowId);
                return new CursorLoader(getActivity(), uri,
                        TVShowDetailsQuery.PROJECTION, null, null, null);
            case LOADER_CAST:
                uri = MediaContract.TVShowCast.buildTVShowCastListUri(hostInfo.getId(), tvshowId);
                return new CursorLoader(getActivity(), uri,
                        TVShowCastListQuery.PROJECTION, null, null, TVShowCastListQuery.SORT);
            default:
                return null;
        }
    }

    /** {@inheritDoc} */
    @Override
    public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) {
        if (cursor != null && cursor.getCount() > 0) {
            switch (cursorLoader.getId()) {
                case LOADER_TVSHOW:
                    displayTVShowDetails(cursor);
                    checkOutdatedTVShowDetails(cursor);
                    break;
                case LOADER_CAST:
                    displayCastList(cursor);
                    break;
            }
        }
    }

    /** {@inheritDoc} */
    @Override
    public void onLoaderReset(Loader<Cursor> cursorLoader) {
        // Release loader's data
    }

//    /**
//     * Callbacks for button bar
//     */
//    @OnClick(R.id.go_to_imdb)
//    public void onImdbClicked(View v) {
//        String imdbNumber = (String)v.getTag();
//
//        if (imdbNumber != null) {
//            Utils.openImdbForMovie(getActivity(), imdbNumber);
//        }
//    }

    /**
     * Display the tv show details
     *
     * @param cursor Cursor with the data
     */
    private void displayTVShowDetails(Cursor cursor) {
        cursor.moveToFirst();
        String tvshowTitle = cursor.getString(TVShowDetailsQuery.TITLE);
        mediaTitle.setText(tvshowTitle);
        int numEpisodes = cursor.getInt(TVShowDetailsQuery.EPISODE),
                watchedEpisodes = cursor.getInt(TVShowDetailsQuery.WATCHEDEPISODES);
        String episodes = String.format(getString(R.string.num_episodes),
                numEpisodes, numEpisodes - watchedEpisodes);
        mediaUndertitle.setText(episodes);

        String premiered = String.format(getString(R.string.premiered),
                cursor.getString(TVShowDetailsQuery.PREMIERED)) +
                "  |  " + cursor.getString(TVShowDetailsQuery.STUDIO);
        mediaPremiered.setText(premiered);
        mediaGenres.setText(cursor.getString(TVShowDetailsQuery.GENRES));

        double rating = cursor.getDouble(TVShowDetailsQuery.RATING);
        if (rating > 0) {
            mediaRating.setVisibility(View.VISIBLE);
            mediaMaxRating.setVisibility(View.VISIBLE);
            mediaRating.setText(String.format("%01.01f", rating));
            mediaMaxRating.setText(getString(R.string.max_rating_video));
        } else {
            mediaRating.setVisibility(View.INVISIBLE);
            mediaMaxRating.setVisibility(View.INVISIBLE);
        }

        mediaDescription.setText(cursor.getString(TVShowDetailsQuery.PLOT));

//        // IMDB button
//        imdbButton.setTag(cursor.getString(TVShowDetailsQuery.IMDBNUMBER));

        // Images
        Resources resources = getActivity().getResources();
        DisplayMetrics displayMetrics = new DisplayMetrics();
        getActivity().getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);

        int posterWidth = resources.getDimensionPixelOffset(R.dimen.now_playing_poster_width);
        int posterHeight = resources.getDimensionPixelOffset(R.dimen.now_playing_poster_height);
        UIUtils.loadImageWithCharacterAvatar(getActivity(), hostManager,
                cursor.getString(TVShowDetailsQuery.THUMBNAIL), tvshowTitle,
                mediaPoster, posterWidth, posterHeight);
        int artHeight = resources.getDimensionPixelOffset(R.dimen.now_playing_art_height);
        UIUtils.loadImageIntoImageview(hostManager,
                cursor.getString(TVShowDetailsQuery.FANART),
                mediaArt, displayMetrics.widthPixels, artHeight);
    }

    /**
     * Display the cast details
     *
     * @param cursor Cursor with the data
     */
    private void displayCastList(Cursor cursor) {
        // Transform the cursor into a List<VideoType.Cast>

        if (cursor.moveToFirst()) {
            List<VideoType.Cast> castList = new ArrayList<VideoType.Cast>(cursor.getCount());
            do {
                castList.add(new VideoType.Cast(cursor.getString(TVShowCastListQuery.NAME),
                        cursor.getInt(TVShowCastListQuery.ORDER),
                        cursor.getString(TVShowCastListQuery.ROLE),
                        cursor.getString(TVShowCastListQuery.THUMBNAIL)));
            } while (cursor.moveToNext());

            UIUtils.setupCastInfo(getActivity(), castList, videoCastList,
                    videoAdditionalCastTitle, videoAdditionalCastList);
        }
    }

    /**
     * Checks wether we should refresh the TV Show details with the info on XBMC
     * The details will be updated if the last update is older than what is configured in the
     * settings
     *
     * @param cursor Cursor with the data
     */
    private void checkOutdatedTVShowDetails(Cursor cursor) {
        if (hasIssuedOutdatedRefresh)
            return;

        cursor.moveToFirst();
        long lastUpdated = cursor.getLong(TVShowDetailsQuery.UPDATED);

        if (System.currentTimeMillis() > lastUpdated + Settings.DB_UPDATE_INTERVAL) {
            // Trigger a silent refresh
            hasIssuedOutdatedRefresh = true;
            startSync(true);
        }
    }

    /**
     * TV Show details query parameters.
     */
    private interface TVShowDetailsQuery {
        String[] PROJECTION = {
                BaseColumns._ID,
                MediaContract.TVShows.TITLE,
                MediaContract.TVShows.THUMBNAIL,
                MediaContract.TVShows.FANART,
                MediaContract.TVShows.PREMIERED,
                MediaContract.TVShows.STUDIO,
                MediaContract.TVShows.EPISODE,
                MediaContract.TVShows.WATCHEDEPISODES,
                MediaContract.TVShows.RATING,
                MediaContract.TVShows.PLOT,
                MediaContract.TVShows.PLAYCOUNT,
                MediaContract.TVShows.IMDBNUMBER,
                MediaContract.TVShows.GENRES,
                MediaContract.SyncColumns.UPDATED,
        };

        final int ID = 0;
        final int TITLE = 1;
        final int THUMBNAIL = 2;
        final int FANART = 3;
        final int PREMIERED = 4;
        final int STUDIO = 5;
        final int EPISODE = 6;
        final int WATCHEDEPISODES = 7;
        final int RATING = 8;
        final int PLOT = 9;
        final int PLAYCOUNT = 10;
        final int IMDBNUMBER = 11;
        final int GENRES = 12;
        final int UPDATED = 13;
    }

    /**
     * Movie cast list query parameters.
     */
    private interface TVShowCastListQuery {
        String[] PROJECTION = {
                BaseColumns._ID,
                MediaContract.TVShowCast.NAME,
                MediaContract.TVShowCast.ORDER,
                MediaContract.TVShowCast.ROLE,
                MediaContract.TVShowCast.THUMBNAIL,
        };

        String SORT = MediaContract.TVShowCast.ORDER + " ASC";

        final int ID = 0;
        final int NAME = 1;
        final int ORDER = 2;
        final int ROLE = 3;
        final int THUMBNAIL = 4;
    }
}