/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * 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 com.android.settings;

import static com.google.common.truth.Truth.assertThat;

import java.util.HashMap;
import java.util.Map;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringWriter;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.annotation.Config;
import org.xmlpull.v1.XmlPullParserException;

@RunWith(SettingsRobolectricTestRunner.class)
@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
public class LicenseHtmlGeneratorFromXmlTest {
    private static final String VAILD_XML_STRING =
            "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
            "<licenses>\n" +
            "<file-name contentId=\"0\">/file0</file-name>\n" +
            "<file-name contentId=\"0\">/file1</file-name>\n" +
            "<file-content contentId=\"0\"><![CDATA[license content #0]]></file-content>\n" +
            "</licenses>";

    private static final String INVAILD_XML_STRING =
            "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
            "<licenses2>\n" +
            "<file-name contentId=\"0\">/file0</file-name>\n" +
            "<file-name contentId=\"0\">/file1</file-name>\n" +
            "<file-content contentId=\"0\"><![CDATA[license content #0]]></file-content>\n" +
            "</licenses2>";

    private static final String EXPECTED_HTML_STRING =
            "<html><head>\n" +
            "<style type=\"text/css\">\n" +
            "body { padding: 0; font-family: sans-serif; }\n" +
            ".same-license { background-color: #eeeeee;\n" +
            "                border-top: 20px solid white;\n" +
            "                padding: 10px; }\n" +
            ".label { font-weight: bold; }\n" +
            ".file-list { margin-left: 1em; color: blue; }\n" +
            "</style>\n" +
            "</head>" +
            "<body topmargin=\"0\" leftmargin=\"0\" rightmargin=\"0\" bottommargin=\"0\">\n" +
            "<div class=\"toc\">\n" +
            "<ul>\n" +
            "<li><a href=\"#id0\">/file0</a></li>\n" +
            "<li><a href=\"#id0\">/file1</a></li>\n" +
            "</ul>\n" +
            "</div><!-- table of contents -->\n" +
            "<table cellpadding=\"0\" cellspacing=\"0\" border=\"0\">\n" +
            "<tr id=\"id0\"><td class=\"same-license\">\n" +
            "<div class=\"label\">Notices for file(s):</div>\n" +
            "<div class=\"file-list\">\n" +
            "/file0 <br/>\n" +
            "/file1 <br/>\n" +
            "</div><!-- file-list -->\n" +
            "<pre class=\"license-text\">\n" +
            "license content #0\n" +
            "</pre><!-- license-text -->\n" +
            "</td></tr><!-- same-license -->\n" +
            "</table></body></html>\n";

    @Test
    public void testParseValidXmlStream() throws XmlPullParserException, IOException {
        Map<String, String> fileNameToContentIdMap = new HashMap<String, String>();
        Map<String, String> contentIdToFileContentMap = new HashMap<String, String>();

        LicenseHtmlGeneratorFromXml.parse(
                new InputStreamReader(new ByteArrayInputStream(VAILD_XML_STRING.getBytes())),
                fileNameToContentIdMap, contentIdToFileContentMap);
        assertThat(fileNameToContentIdMap.size()).isEqualTo(2);
        assertThat(fileNameToContentIdMap.get("/file0")).isEqualTo("0");
        assertThat(fileNameToContentIdMap.get("/file1")).isEqualTo("0");
        assertThat(contentIdToFileContentMap.size()).isEqualTo(1);
        assertThat(contentIdToFileContentMap.get("0")).isEqualTo("license content #0");
    }

    @Test(expected = XmlPullParserException.class)
    public void testParseInvalidXmlStream() throws XmlPullParserException, IOException {
        Map<String, String> fileNameToContentIdMap = new HashMap<String, String>();
        Map<String, String> contentIdToFileContentMap = new HashMap<String, String>();

        LicenseHtmlGeneratorFromXml.parse(
                new InputStreamReader(new ByteArrayInputStream(INVAILD_XML_STRING.getBytes())),
                fileNameToContentIdMap, contentIdToFileContentMap);
    }

    @Test
    public void testGenerateHtml() {
        Map<String, String> fileNameToContentIdMap = new HashMap<String, String>();
        Map<String, String> contentIdToFileContentMap = new HashMap<String, String>();

        fileNameToContentIdMap.put("/file0", "0");
        fileNameToContentIdMap.put("/file1", "0");
        contentIdToFileContentMap.put("0", "license content #0");

        StringWriter output = new StringWriter();
        LicenseHtmlGeneratorFromXml.generateHtml(
                fileNameToContentIdMap, contentIdToFileContentMap, new PrintWriter(output));
        assertThat(output.toString()).isEqualTo(EXPECTED_HTML_STRING);
    }
}