/*
 * Copyright 2008-2019 by Emeric Vernat
 *
 *     This file is part of Java Melody.
 *
 * 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 net.bull.javamelody.internal.web.pdf;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.lowagie.text.Anchor;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfPCell;

import net.bull.javamelody.internal.common.I18N;
import net.bull.javamelody.internal.model.ProcessInformations;
import net.bull.javamelody.internal.web.html.HtmlProcessInformationsReport;

/**
 * Rapport pdf pour les processus du système d'exploitation.
 * @author Emeric Vernat
 */
class PdfProcessInformationsReport extends PdfAbstractTableReport {
	private final List<ProcessInformations> processInformationsList;
	private final boolean windows;
	private final DecimalFormat percentFormat = I18N.createPercentFormat();
	private final DecimalFormat integerFormat = I18N.createIntegerFormat();

	PdfProcessInformationsReport(List<ProcessInformations> processInformationsList,
			Document document) {
		super(document);
		assert processInformationsList != null;

		this.processInformationsList = processInformationsList;
		this.windows = HtmlProcessInformationsReport.isWindowsProcessList(processInformationsList);
	}

	@Override
	void toPdf() throws DocumentException {
		writeHeader();

		writeProcessInformations();

		if (!windows) {
			addPsCommandReference();
		}
	}

	private void addPsCommandReference() throws DocumentException {
		final Anchor psAnchor = new Anchor("ps command reference", PdfFonts.BLUE.getFont());
		psAnchor.setName("ps command reference");
		psAnchor.setReference("http://en.wikipedia.org/wiki/Ps_(Unix)");
		psAnchor.setFont(PdfFonts.BLUE.getFont());
		final Paragraph psParagraph = new Paragraph();
		psParagraph.add(psAnchor);
		psParagraph.setAlignment(Element.ALIGN_RIGHT);
		addToDocument(psParagraph);
	}

	private void writeProcessInformations() throws DocumentException {
		for (final ProcessInformations processInformations : processInformationsList) {
			nextRow();
			writeProcessInformations(processInformations);
		}
		addTableToDocument();
	}

	private void writeHeader() throws DocumentException {
		final List<String> headers = createHeaders();
		final int[] relativeWidths = new int[headers.size()];
		Arrays.fill(relativeWidths, 0, headers.size(), 1);
		if (windows) {
			relativeWidths[0] = 2; // user
		}
		relativeWidths[headers.size() - 1] = 6; // command

		initTable(headers, relativeWidths);
	}

	private List<String> createHeaders() {
		final List<String> headers = new ArrayList<>();
		headers.add(getString("Utilisateur"));
		headers.add(getString("PID"));
		if (!windows) {
			headers.add(getString("cpu"));
			headers.add(getString("mem"));
		}
		headers.add(getString("vsz"));
		if (!windows) {
			headers.add(getString("rss"));
			headers.add(getString("tty"));
			headers.add(getString("stat"));
			headers.add(getString("start"));
		}
		headers.add(getString("cpuTime"));
		headers.add(getString("command"));
		return headers;
	}

	private void writeProcessInformations(ProcessInformations processInformations) {
		final PdfPCell defaultCell = getDefaultCell();
		defaultCell.setHorizontalAlignment(Element.ALIGN_LEFT);
		addCell(processInformations.getUser());
		defaultCell.setHorizontalAlignment(Element.ALIGN_RIGHT);
		addCell(integerFormat.format(processInformations.getPid()));
		if (!windows) {
			addCell(percentFormat.format(processInformations.getCpuPercentage()));
			addCell(percentFormat.format(processInformations.getMemPercentage()));
		}
		addCell(integerFormat.format(processInformations.getVsz()));
		if (!windows) {
			addCell(integerFormat.format(processInformations.getRss()));
			defaultCell.setHorizontalAlignment(Element.ALIGN_LEFT);
			addCell(processInformations.getTty());
			addCell(processInformations.getStat());
			defaultCell.setHorizontalAlignment(Element.ALIGN_RIGHT);
			addCell(processInformations.getStart());
		}
		addCell(processInformations.getCpuTime());
		defaultCell.setHorizontalAlignment(Element.ALIGN_LEFT);
		addCell(processInformations.getCommand());
	}
}
