/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.dmdirc.addons.identd;

import com.dmdirc.interfaces.Connection;
import com.dmdirc.interfaces.ConnectionManager;
import com.dmdirc.interfaces.User;
import com.dmdirc.config.provider.AggregateConfigProvider;
import com.dmdirc.parser.irc.IRCClientInfo;
import com.dmdirc.parser.irc.IRCParser;
import com.dmdirc.util.system.SystemInfo;

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

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.when;

@RunWith(MockitoJUnitRunner.class)
public class IdentClientTest {

    @Mock private AggregateConfigProvider acp;
    @Mock private ConnectionManager sm;
    @Mock private Connection connection;
    @Mock private IRCParser parser;
    @Mock private IRCClientInfo client;
    @Mock private User user;
    @Mock private AggregateConfigProvider config;
    @Mock private SystemInfo systemInfo;

    protected IdentClient getClient() {
        final List<Connection> servers = new ArrayList<>();
        servers.add(connection);

        when(sm.getConnections()).thenReturn(servers);
        when(connection.getParser()).thenReturn(Optional.of(parser));
        when(connection.getLocalUser()).thenReturn(Optional.of(user));
        when(parser.getLocalPort()).thenReturn(60);
        when(parser.getLocalClient()).thenReturn(client);
        when(client.getNickname()).thenReturn("nickname");
        when(client.getUsername()).thenReturn("username");
        when(user.getNickname()).thenReturn("nickname");
        when(user.getUsername()).thenReturn(Optional.of("username"));

        return new IdentClient(null, null, sm, config, "plugin-Identd", systemInfo);
    }

    @Test
    public void testInvalidIdent() {
        final String response = getClient().getIdentResponse("invalid request!", acp);

        assertContains("Illegal requests must result in an ERROR response",
                response, "ERROR");
    }

    @Test
    public void testQuoting() {
        final String response = getClient().getIdentResponse("in\\valid:invalid", acp);

        assertStartsWith("Special chars in illegal requests must be quoted",
                response, "in\\\\valid\\:invalid");
    }

    @Test
    public void testQuoting2() {
        final String response = getClient().getIdentResponse("in\\\\valid\\ inv\\:alid", acp);

        assertStartsWith("Escaped characters in illegal requests shouldn't be doubly-escaped",
                response, "in\\\\valid\\ inv\\:alid");
    }

    @Test
    public void testNonNumericPort() {
        final String response = getClient().getIdentResponse("abc, def", acp);

        assertContains("Non-numeric ports must result in an ERROR response",
                response, "ERROR");
        assertStartsWith("Specified ports must be returned in the response",
                response.replaceAll("\\s+", ""), "abc,def:");
    }

    private void doPortTest(final String ports) {
        final String response = getClient().getIdentResponse(ports, acp);

        assertContains("Illegal ports must result in an ERROR response",
                response, "ERROR");
        assertContains("Illegal ports must result in an INVALID-PORT response",
                response, "INVALID-PORT");
        assertStartsWith("Port numbers must be returned as part of the response",
                response.replaceAll("\\s+", ""), ports.replaceAll("\\s+", ""));
    }

    @Test
    public void testOutOfRangePorts() {
        doPortTest("0, 50");
        doPortTest("65536, 50");
        doPortTest("50, 0");
        doPortTest("50, 65536");
    }

    @Test
    public void testAlwaysOn() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(false);

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertContains("Unknown port requests must return an ERROR response",
                response, "ERROR");
        assertContains("Unknown port requests must return a NO-USER response",
                response, "NO-USER");
    }

    @Test
    public void testHidden() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.isHiddenUser")).thenReturn(true);

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertContains("Hidden requests must return an ERROR response",
                response, "ERROR");
        assertContains("Hidden requests must return a HIDDEN-USER response",
                response, "HIDDEN-USER");
    }

    @Test
    public void testSystemNameQuoting() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.isHiddenUser")).thenReturn(false);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(true);
        when(acp.getOption("plugin-Identd", "advanced.customSystem")).thenReturn("a:b\\c,d");
        when(acp.getOptionBool("plugin-Identd", "general.useCustomName")).thenReturn(false);
        when(acp.getOption("plugin-Identd", "general.customName")).thenReturn("");
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("test");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertContains("Special characters must be quoted in system names",
                response, "a\\:b\\\\c\\,d");
    }

    @Test
    public void testCustomNameQuoting() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.isHiddenUser")).thenReturn(false);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(acp.getOption("plugin-Identd", "advanced.customSystem")).thenReturn("");
        when(acp.getOptionBool("plugin-Identd", "general.useCustomName")).thenReturn(true);
        when(acp.getOption("plugin-Identd", "general.customName")).thenReturn("a:b\\c,d");
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("test");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertContains("Special characters must be quoted in custom names",
                response, "a\\:b\\\\c\\,d");
    }

    @Test
    public void testCustomNames() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.isHiddenUser")).thenReturn(false);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(true);
        when(acp.getOption("plugin-Identd", "advanced.customSystem")).thenReturn("system");
        when(acp.getOptionBool("plugin-Identd", "general.useCustomName")).thenReturn(true);
        when(acp.getOption("plugin-Identd", "general.customName")).thenReturn("name");
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("test");

        final String response = getClient().getIdentResponse("50, 60", acp);
        final String[] bits = response.split(":");

        assertTrue("Responses must include port pair",
                bits[0].matches("\\s*50\\s*,\\s*60\\s*"));
        assertEquals("Positive response must include USERID",
                "USERID", bits[1].trim());
        assertEquals("Must use custom system name", "system", bits[2].trim());
        assertEquals("Must use custom name", "name", bits[3].trim());
    }

    @Test
    public void testOSWindows() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("windows");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : WIN32 : test", response);
    }

    @Test
    public void testOSMac() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("mac");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : MACOS : test", response);
    }

    @Test
    public void testOSLinux() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("linux");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : UNIX : test", response);
    }

    @Test
    public void testOSBSD() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("bsd");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : UNIX-BSD : test", response);
    }

    @Test
    public void testOSOS2() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("os/2");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : OS/2 : test", response);
    }

    @Test
    public void testOSUnix() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("unix");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : UNIX : test", response);
    }

    @Test
    public void testOSIrix() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("irix");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : IRIX : test", response);
    }

    @Test
    public void testOSUnknown() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "advanced.useCustomSystem")).thenReturn(false);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("test");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : UNKNOWN : test", response);
    }

    @Test
    public void testNameCustom() {
        when(acp.getOptionBool("plugin-Identd", "advanced.alwaysOn")).thenReturn(true);
        when(acp.getOptionBool("plugin-Identd", "general.useCustomName")).thenReturn(true);
        when(acp.getOption("plugin-Identd", "general.customName")).thenReturn("name");
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("test");

        final String response = getClient().getIdentResponse("50, 50", acp);
        assertEquals("50 , 50 : USERID : UNKNOWN : name", response);
    }

    @Test
    public void testNameNickname() {
        when(acp.getOptionBool("plugin-Identd", "general.useNickname")).thenReturn(true);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("test");

        final String response = getClient().getIdentResponse("60, 50", acp);
        assertEquals("60 , 50 : USERID : UNKNOWN : nickname", response);
    }

    @Test
    public void testNameUsername() {
        when(acp.getOptionBool("plugin-Identd", "general.useUsername")).thenReturn(true);
        when(systemInfo.getProperty("user.name")).thenReturn("test");
        when(systemInfo.getProperty("os.name")).thenReturn("test");

        final String response = getClient().getIdentResponse("60, 50", acp);
        assertEquals("60 , 50 : USERID : UNKNOWN : username", response);
    }

    private static void assertContains(final String msg, final String haystack,
            final CharSequence needle) {
        assertTrue(msg, haystack.contains(needle));
    }

    private static void assertStartsWith(final String msg, final String haystack,
            final String needle) {
        assertTrue(msg, haystack.startsWith(needle));
    }

}