package de.danoeh.antennapod.asynctask;

import android.annotation.SuppressLint;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.Toast;
import de.danoeh.antennapod.BuildConfig;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.activity.MainActivity;
import de.danoeh.antennapod.storage.DBReader;
import de.danoeh.antennapod.storage.DBWriter;
import de.danoeh.antennapod.util.flattr.FlattrThing;
import de.danoeh.antennapod.util.flattr.FlattrUtils;

import java.util.ArrayList;
import java.util.List;

/**
 * Performs a click action in a background thread.
 */

public class FlattrClickWorker extends AsyncTask<Void, String, Void> {
    protected static final String TAG = "FlattrClickWorker";
    protected Context context;

    private final int NOTIFICATION_ID = 4;

    protected String errorMsg;
    protected int exitCode;
    protected ArrayList<String> flattrd;
    protected ArrayList<String> flattr_failed;


    protected NotificationCompat.Builder notificationCompatBuilder;
    private Notification.BigTextStyle notificationBuilder;
    protected NotificationManager notificationManager;

    protected ProgressDialog progDialog;

    protected final static int EXIT_DEFAULT = 0;
    protected final static int NO_TOKEN = 1;
    protected final static int ENQUEUED = 2;
    protected final static int NO_THINGS = 3;

    public final static int ENQUEUE_ONLY = 1;
    public final static int FLATTR_TOAST = 2;
    public static final int FLATTR_NOTIFICATION = 3;

    private int run_mode = FLATTR_NOTIFICATION;

    private FlattrThing extra_flattr_thing; // additional urls to flattr that do *not* originate from the queue

    /**
     * @param context
     * @param run_mode can be one of ENQUEUE_ONLY, FLATTR_TOAST and FLATTR_NOTIFICATION
     */
    public FlattrClickWorker(Context context, int run_mode) {
        this(context);
        this.run_mode = run_mode;
    }

    public FlattrClickWorker(Context context) {
        super();
        this.context = context;
        exitCode = EXIT_DEFAULT;

        flattrd = new ArrayList<String>();
        flattr_failed = new ArrayList<String>();

        errorMsg = "";
    }

    /* only used in PreferencesActivity for flattring antennapod itself,
    * can't really enqueue this thing
    */
    public FlattrClickWorker(Context context, FlattrThing thing) {
        this(context);
        extra_flattr_thing = thing;
        run_mode = FLATTR_TOAST;
        Log.d(TAG, "Going to flattr special thing that is not in the queue: " + thing.getTitle());
    }

    protected void onNoAccessToken() {
        Log.w(TAG, "No access token was available");
    }

    protected void onFlattrError() {
        FlattrUtils.showErrorDialog(context, errorMsg);
    }

    protected void onFlattred() {
        String notificationTitle = context.getString(R.string.flattrd_label);
        String notificationText = "", notificationSubText = "", notificationBigText = "";

        // text for successfully flattred items
        if (flattrd.size() == 1)
            notificationText = String.format(context.getString(R.string.flattr_click_success));
        else if (flattrd.size() > 1) // flattred pending items from queue
            notificationText = String.format(context.getString(R.string.flattr_click_success_count, flattrd.size()));

        if (flattrd.size() > 0) {
            String acc = "";
            for (String s : flattrd)
                acc += s + '\n';
            acc = acc.substring(0, acc.length() - 2);

            notificationBigText = String.format(context.getString(R.string.flattr_click_success_queue), acc);
        }

        // add text for failures
        if (flattr_failed.size() > 0) {
            notificationTitle = context.getString(R.string.flattrd_failed_label);
            notificationText = String.format(context.getString(R.string.flattr_click_failure_count), flattr_failed.size())
                    + " " + notificationText;

            notificationSubText = flattr_failed.get(0);

            String acc = "";
            for (String s : flattr_failed)
                acc += s + '\n';
            acc = acc.substring(0, acc.length() - 2);

            notificationBigText = String.format(context.getString(R.string.flattr_click_failure), acc)
                    + "\n" + notificationBigText;
        }

        Log.d(TAG, "Going to post notification: " + notificationBigText);

        notificationManager.cancel(NOTIFICATION_ID);

        if (run_mode == FLATTR_NOTIFICATION || flattr_failed.size() > 0) {
            PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(context, MainActivity.class), 0);
            if (android.os.Build.VERSION.SDK_INT >= 16) {
                notificationBuilder = new Notification.BigTextStyle(
                        new Notification.Builder(context)
                                .setOngoing(false)
                                .setContentTitle(notificationTitle)
                                .setContentText(notificationText)
                                .setContentIntent(contentIntent)
                                .setSubText(notificationSubText)
                                .setSmallIcon(R.drawable.stat_notify_sync))
                        .bigText(notificationText + "\n" + notificationBigText);
                notificationManager.notify(NOTIFICATION_ID, notificationBuilder.build());
            } else {
                notificationCompatBuilder = new NotificationCompat.Builder(context) // need new notificationBuilder and cancel/renotify to get rid of progress bar
                        .setContentTitle(notificationTitle)
                        .setContentText(notificationText)
                        .setContentIntent(contentIntent)
                        .setSubText(notificationBigText)
                        .setTicker(notificationTitle)
                        .setSmallIcon(R.drawable.stat_notify_sync)
                        .setOngoing(false);
                notificationManager.notify(NOTIFICATION_ID, notificationCompatBuilder.build());
            }
        } else if (run_mode == FLATTR_TOAST) {
            Toast.makeText(context.getApplicationContext(),
                    notificationText,
                    Toast.LENGTH_LONG)
                    .show();
        }
    }

    protected void onEnqueue() {
        Toast.makeText(context.getApplicationContext(),
                R.string.flattr_click_enqueued,
                Toast.LENGTH_LONG)
                .show();
    }

    protected void onSetupNotification() {
        if (android.os.Build.VERSION.SDK_INT >= 16) {
            notificationBuilder = new Notification.BigTextStyle(
                    new Notification.Builder(context)
                            .setContentTitle(context.getString(R.string.flattring_label))
                            .setAutoCancel(true)
                            .setSmallIcon(R.drawable.stat_notify_sync)
                            .setProgress(0, 0, true)
                            .setOngoing(true));
        } else {
            notificationCompatBuilder = new NotificationCompat.Builder(context)
                    .setContentTitle(context.getString(R.string.flattring_label))
                    .setAutoCancel(true)
                    .setSmallIcon(R.drawable.stat_notify_sync)
                    .setProgress(0, 0, true)
                    .setOngoing(true);
        }

        notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    }

    @Override
    protected void onPostExecute(Void result) {
        if (BuildConfig.DEBUG) Log.d(TAG, "Exit code was " + exitCode);

        switch (exitCode) {
            case NO_TOKEN:
                notificationManager.cancel(NOTIFICATION_ID);
                onNoAccessToken();
                break;
            case ENQUEUED:
                onEnqueue();
                break;
            case EXIT_DEFAULT:
                onFlattred();
                break;
            case NO_THINGS: // FlattrClickWorker called automatically somewhere to empty flattr queue
                notificationManager.cancel(NOTIFICATION_ID);
                break;
        }
    }

    @Override
    protected void onPreExecute() {
        onSetupNotification();
    }

    private static boolean haveInternetAccess(Context context) {
        ConnectivityManager cm =
                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo networkInfo = cm.getActiveNetworkInfo();
        return (networkInfo != null && networkInfo.isConnectedOrConnecting());
    }

    @Override
    protected Void doInBackground(Void... params) {
        if (BuildConfig.DEBUG) Log.d(TAG, "Starting background work");

        exitCode = EXIT_DEFAULT;

        if (!FlattrUtils.hasToken()) {
            exitCode = NO_TOKEN;
        } else if (DBReader.getFlattrQueueEmpty(context) && extra_flattr_thing == null) {
            exitCode = NO_THINGS;
        } else if (!haveInternetAccess(context) || run_mode == ENQUEUE_ONLY) {
            exitCode = ENQUEUED;
        } else {
            List<FlattrThing> flattrList = DBReader.getFlattrQueue(context);
            Log.d(TAG, "flattrQueue processing list with " + flattrList.size() + " items.");

            if (extra_flattr_thing != null)
                flattrList.add(extra_flattr_thing);

            flattrd.ensureCapacity(flattrList.size());

            for (FlattrThing thing : flattrList) {
                try {
                    Log.d(TAG, "flattrQueue processing " + thing.getTitle() + " " + thing.getPaymentLink());
                    publishProgress(String.format(context.getString(R.string.flattring_thing), thing.getTitle()));

                    thing.getFlattrStatus().setUnflattred();  // pop from queue to prevent unflattrable things from getting stuck in flattr queue infinitely

                    FlattrUtils.clickUrl(context, thing.getPaymentLink());
                    flattrd.add(thing.getTitle());

                    thing.getFlattrStatus().setFlattred();
                } catch (Exception e) {
                    Log.d(TAG, "flattrQueue processing exception at item " + thing.getTitle() + " " + e.getMessage());
                    flattr_failed.ensureCapacity(flattrList.size());
                    flattr_failed.add(thing.getTitle() + ": " + e.getMessage());
                }
                Log.d(TAG, "flattrQueue processing - going to write thing back to db with flattr_status " + Long.toString(thing.getFlattrStatus().toLong()));
                DBWriter.setFlattredStatus(context, thing, false);
            }

        }

        return null;
    }

    @Override
    protected void onProgressUpdate(String... names) {
        PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(context, MainActivity.class), 0);
        if (android.os.Build.VERSION.SDK_INT >= 16) {
            notificationBuilder.setBigContentTitle(names[0]);
            notificationManager.notify(NOTIFICATION_ID, notificationBuilder.build());
        } else {
            notificationCompatBuilder.setContentText(names[0]);
            notificationCompatBuilder.setContentIntent(contentIntent);
            notificationManager.notify(NOTIFICATION_ID, notificationCompatBuilder.build());
        }
    }

    @SuppressLint("NewApi")
    public void executeAsync() {
        FlattrUtils.hasToken();
        if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.GINGERBREAD_MR1) {
            executeOnExecutor(THREAD_POOL_EXECUTOR);
        } else {
            execute();
        }
    }
}