/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You 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.apache.poi.hmef.attribute;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertThrows;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Locale;

import org.apache.poi.POIDataSamples;
import org.apache.poi.hmef.Attachment;
import org.apache.poi.hmef.HMEFMessage;
import org.apache.poi.hsmf.datatypes.MAPIProperty;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.LocaleUtil;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

public final class TestTNEFAttributes {
    private static final POIDataSamples _samples = POIDataSamples.getHMEFInstance();
    private HMEFMessage quick;

    @BeforeEach
    void setUp() throws Exception {
        try (InputStream is = _samples.openResourceAsStream("quick-winmail.dat")) {
            quick = new HMEFMessage(is);
        }
    }

    /**
     * Test malformed TNEF is detected by MAPIAttribute and does not cause Out Of Memory error
     */
    @Test
    void testMalformedTNEF() throws Exception {
        try (InputStream is = _samples.openResourceAsStream("oom.tnef")) {
            assertThrows(IOException.class, ()-> new HMEFMessage(is));
        }
    }

    /**
     * Test counts
     */
    @Test
    void testCounts() throws Exception {
        // The message should have 4 attributes
        assertEquals(4, quick.getMessageAttributes().size());

        // Each attachment should have 6 attributes
        for (Attachment attach : quick.getAttachments()) {
            assertEquals(6, attach.getAttributes().size());
        }
    }

    /**
     * Test the basics
     */
    @Test
    void testBasics() throws Exception {
        // An int one
        assertEquals(
                0x010000,
                LittleEndian.getInt(quick.getMessageAttribute(TNEFProperty.ID_TNEFVERSION).getData())
        );

        // Claims not to be text, but really is
        assertEquals(
                "IPM.Microsoft Mail.Note\0",
            new String(quick.getMessageAttribute(TNEFProperty.ID_MESSAGECLASS).getData(), StandardCharsets.US_ASCII)
        );

        // Try constructing two attributes
        byte[] data = new byte[]{
                // Level one, id 36870, type 8
                0x01, 0x06, (byte) 0x90, 0x08, 0x00,
                // Length 4
                0x04, 0x00, 0x00, 0x00,
                // Data
                0x00, 0x00, 0x01, 0x00,
                // Checksum
                0x01, 0x00,

                // level one, id 36871, type 6
                0x01, 0x07, (byte) 0x90, 0x06, 0x00,
                // Length 8
                0x08, 0x00, 0x00, 0x00,
                // Data
                (byte) 0xe4, 0x04, 0x00, 0x00,
                0x00, 0x00, 0x00, 0x00,
                // Checksum
                (byte) 0xe8, 0x00
        };
        ByteArrayInputStream bais = new ByteArrayInputStream(data);

        // Create them
        int level = bais.read();
        assertEquals(1, level);
        TNEFAttribute attr1 = TNEFAttribute.create(bais);

        level = bais.read();
        assertEquals(1, level);
        TNEFAttribute attr2 = TNEFAttribute.create(bais);

        assertEquals(-1, bais.read());

        // Check them
        assertEquals(TNEFProperty.ID_TNEFVERSION, attr1.getProperty());
        assertEquals(8, attr1.getType());
        assertEquals(4, attr1.getData().length);
        assertEquals(0x010000, LittleEndian.getInt(attr1.getData()));

        assertEquals(TNEFProperty.ID_OEMCODEPAGE, attr2.getProperty());
        assertEquals(6, attr2.getType());
        assertEquals(8, attr2.getData().length);
        assertEquals(0x04e4, LittleEndian.getInt(attr2.getData()));
    }

    /**
     * Test string based ones
     */
    @Test
    void testString() throws Exception {
        TNEFAttribute attr = quick.getAttachments().get(0).getAttribute(
                TNEFProperty.ID_ATTACHTITLE
        );
        assertNotNull(attr);
        assertEquals(TNEFStringAttribute.class, attr.getClass());

        // It is a null terminated string
       assertEquals("quick.doc\u0000", new String(attr.getData(), StandardCharsets.US_ASCII));

        // But when we ask for the string, that is sorted for us
        TNEFStringAttribute str = (TNEFStringAttribute) attr;
        assertEquals("quick.doc", str.getString());
    }

    /**
     * Test date based ones
     */
    @Test
    void testDate() throws Exception {
        TNEFAttribute attr = quick.getAttachments().get(0).getAttribute(
                TNEFProperty.ID_ATTACHMODIFYDATE
        );
        assertNotNull(attr);
        assertEquals(TNEFDateAttribute.class, attr.getClass());

        // It is a series of date parts
        // Weds 28th April 2010 @ 12:40:56 UTC
        assertEquals(2010, LittleEndian.getUShort(attr.getData(), 0));
        assertEquals(04, LittleEndian.getUShort(attr.getData(), 2));
        assertEquals(28, LittleEndian.getUShort(attr.getData(), 4));
        assertEquals(12, LittleEndian.getUShort(attr.getData(), 6));
        assertEquals(40, LittleEndian.getUShort(attr.getData(), 8));
        assertEquals(56, LittleEndian.getUShort(attr.getData(), 10));
        assertEquals(3, LittleEndian.getUShort(attr.getData(), 12)); // Weds

        // Ask for it as a Java date, and have it converted
        // Pick a predictable format + location + timezone
        TNEFDateAttribute date = (TNEFDateAttribute) attr;
        DateFormat fmt = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss", Locale.UK);
        fmt.setTimeZone(LocaleUtil.TIMEZONE_UTC);
        assertEquals("28-Apr-2010 12:40:56", fmt.format(date.getDate()));
    }

    /**
     * Test a bit of mapi
     */
    @Test
    void testMAPI() throws Exception {
        // Message MAPI
        TNEFAttribute attr = quick.getMessageAttribute(
                TNEFProperty.ID_MAPIPROPERTIES
        );
        assertNotNull(attr);
        assertEquals(TNEFMAPIAttribute.class, attr.getClass());

        TNEFMAPIAttribute mapi = (TNEFMAPIAttribute) attr;
        assertEquals(54, mapi.getMAPIAttributes().size());
        assertEquals(
                MAPIProperty.ALTERNATE_RECIPIENT_ALLOWED,
                mapi.getMAPIAttributes().get(0).getProperty()
        );


        // Attribute MAPI
        attr = quick.getAttachments().get(0).getAttribute(
                TNEFProperty.ID_ATTACHMENT
        );
        assertNotNull(attr);
        assertEquals(TNEFMAPIAttribute.class, attr.getClass());

        mapi = (TNEFMAPIAttribute) attr;
        assertEquals(22, mapi.getMAPIAttributes().size());
        assertEquals(
                MAPIProperty.ATTACH_SIZE,
                mapi.getMAPIAttributes().get(0).getProperty()
        );
    }

    /**
     * Test common ones via helpers
     */
    @Test
    void testCommon() throws Exception {
        assertEquals("This is a test message", quick.getSubject());
        assertEquals("quick.doc", quick.getAttachments().get(0).getFilename());
    }
}
