/*
 * Copyright © 2016 TIBCO Software,Inc.All rights reserved.
 * http://community.jaspersoft.com/project/jaspermobile-android
 *
 * Unless you have purchased a commercial license agreement from TIBCO Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of TIBCO Jaspersoft Mobile for Android.
 *
 * TIBCO Jaspersoft Mobile is free software:you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation,either version 3of the License,or
 * (at your option)any later version.
 *
 * TIBCO Jaspersoft Mobile is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY;without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with TIBCO Jaspersoft Mobile for Android.If not,see
 * <http://www.gnu.org/licenses/lgpl>.
 */

package com.jaspersoft.android.jaspermobile.util.print;

import android.content.Context;
import android.os.Bundle;
import android.os.CancellationSignal;
import android.os.ParcelFileDescriptor;
import android.print.PageRange;
import android.print.PrintAttributes;
import android.print.PrintDocumentAdapter;
import android.print.PrintDocumentInfo;
import android.print.PrintManager;
import android.support.annotation.NonNull;

import com.jaspersoft.android.jaspermobile.domain.PageRequest;
import com.jaspersoft.android.jaspermobile.domain.PrintRequest;
import com.jaspersoft.android.jaspermobile.domain.SimpleSubscriber;
import com.jaspersoft.android.jaspermobile.domain.interactor.report.GetPrintReportPageCase;
import com.jaspersoft.android.jaspermobile.internal.di.ActivityContext;
import com.jaspersoft.android.jaspermobile.internal.di.PerActivity;

import javax.inject.Inject;

/**
 * @author Tom Koptel
 * @since 2.1
 */
@PerActivity
public final class ReportPrintJob implements ResourcePrintJob {
    public static final String TOTAL_PAGES_KEY = "total_pages";
    public static final String REPORT_URI_KEY = "resource_key";

    private final Context mContext;
    private final GetPrintReportPageCase mGetPrintReportPageCase;

    @Inject
    public ReportPrintJob(
            @ActivityContext Context context,
            GetPrintReportPageCase getPrintReportPageCase
    ) {
        mContext = context;
        mGetPrintReportPageCase = getPrintReportPageCase;
    }

    @NonNull
    @Override
    public ResourcePrintJob printResource(@NonNull Bundle args) {
        String printName = args.getString(ResourcePrintJob.PRINT_NAME_KEY);
        String resourceUri = args.getString(REPORT_URI_KEY);
        int totalPages = args.getInt(TOTAL_PAGES_KEY);

        PrintManager printManager = (PrintManager) mContext.getSystemService(Context.PRINT_SERVICE);

        PrintAttributes printAttributes = new PrintAttributes.Builder().build();
        PrintDocumentAdapter printAdapter = new Adapter(printName, resourceUri, totalPages);

        printManager.print(printName, printAdapter, printAttributes);
        return this;
    }

    private void cancelTasks() {
        mGetPrintReportPageCase.unsubscribe();
    }

    private class Adapter extends PrintDocumentAdapter {
        private final String mPrintName;
        private final String mResourceUri;
        private final int mTotalPages;
        private final PageRangeFormat mPageRangeFormat;

        public Adapter(String printName, String resourceUri, int totalPages) {
            mPrintName = printName;
            mResourceUri = resourceUri;
            mTotalPages = totalPages;
            mPageRangeFormat = new PageRangeFormat(mTotalPages);
        }

        @Override
        public void onLayout(
                PrintAttributes oldAttributes,
                PrintAttributes newAttributes,
                CancellationSignal cancellationSignal,
                final LayoutResultCallback callback,
                Bundle extras
        ) {
            if (cancellationSignal.isCanceled()) {
                cancelTasks();
                callback.onLayoutCancelled();
                return;
            }

            PrintDocumentInfo pdi = new PrintDocumentInfo.Builder(mPrintName)
                    .setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)
                    .setPageCount(mTotalPages)
                    .build();
            callback.onLayoutFinished(pdi, true);
        }


        @Override
        public void onWrite(
                final PageRange[] pages,
                final ParcelFileDescriptor destination,
                CancellationSignal cancellationSignal,
                final WriteResultCallback callback
        ) {
            if (cancellationSignal.isCanceled()) {
                cancelTasks();
                callback.onWriteCancelled();
                return;
            }

            String range = mPageRangeFormat.format(pages[0]);
            PageRequest page = new PageRequest.Builder()
                    .setRange(range)
                    .setUri(mResourceUri)
                    .asPdf()
                    .build();
            PrintRequest request = new PrintRequest(page, destination);
            mGetPrintReportPageCase.execute(request, new SimpleSubscriber<ParcelFileDescriptor>() {
                @Override
                public void onError(Throwable e) {
                    callback.onWriteFailed(e.getMessage());
                }

                @Override
                public void onNext(ParcelFileDescriptor page) {
                    callback.onWriteFinished(pages);
                }
            });
        }
    }
}