/*
 * This file is a part of the SteamWar software.
 *
 * Copyright (C) 2020  SteamWar.de-Serverteam
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package de.steamwar.command;

import de.steamwar.TestCommandSender;
import org.junit.Before;
import org.junit.Test;

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

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.*;

public class SimpleCommandPartTest {

    private CommandPart stringCommandPart;
    private CommandPart intCommandPart;
    private CommandPart chainedCommandPart;
    private CommandPart varArgCommandPart;

    private CommandPart simpleGuardPart;

    private CommandPart optionalCommandPart;

    private CommandPart optionalCommandPartMultipleNext;

    @Before
    public void setUp() throws Exception {
        stringCommandPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), null, null, null, GuardCheckType.COMMAND);
        intCommandPart = new CommandPart(SWCommandUtils.MAPPER_FUNCTIONS.get("int"), null, null, null, GuardCheckType.COMMAND);

        chainedCommandPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), null, null, null, GuardCheckType.COMMAND);
        chainedCommandPart.setNext(new CommandPart(SWCommandUtils.MAPPER_FUNCTIONS.get("int"), null, null, null, GuardCheckType.COMMAND));

        varArgCommandPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), null, String.class, null, GuardCheckType.COMMAND);

        simpleGuardPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), (commandSender, guardCheckType, previousArguments, s) -> s.equals("hello") ? GuardResult.DENIED : GuardResult.ALLOWED, null, null, GuardCheckType.COMMAND);

        optionalCommandPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), null, null, "hello", GuardCheckType.COMMAND);
        optionalCommandPart.setNext(new CommandPart(SWCommandUtils.createMapper("hello2", "world2"), null, null, null, GuardCheckType.COMMAND));

        optionalCommandPartMultipleNext = new CommandPart(SWCommandUtils.createMapper("hello", "world"), null, null, "hello", GuardCheckType.COMMAND);
        CommandPart next = new CommandPart(SWCommandUtils.createMapper("hello2", "world2"), null, null, null, GuardCheckType.COMMAND);
        next.setNext(new CommandPart(SWCommandUtils.createMapper("hello3", "world3"), null, null, null, GuardCheckType.COMMAND));
        optionalCommandPartMultipleNext.setNext(next);
    }

    @Test
    public void testCommandPartTabCompleteNoArguments() {
        List<String> tabComplete = new ArrayList<>();
        stringCommandPart.generateTabComplete(tabComplete, new TestCommandSender(), new String[]{""}, 0);
        assertThat(tabComplete.size(), is(2));
        assertThat(tabComplete.get(0), is("hello"));
        assertThat(tabComplete.get(1), is("world"));
    }

    @Test(expected = CommandParseException.class)
    public void testCommandExecuteInvalidArgument() {
        stringCommandPart.generateArgumentArray(new ArrayList<>(), new TestCommandSender(), new String[]{""}, 0);
    }

    @Test
    public void testCommandExecuteValidArgument() {
        List<Object> argumentArray = new ArrayList<>();
        stringCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello"}, 0);
        assertThat(argumentArray.size(), is(1));
        assertThat(argumentArray.get(0), instanceOf(String.class));
        assertThat(argumentArray.get(0), is("hello"));
    }

    @Test
    public void testCommandExecuteValidOtherArgument() {
        List<Object> argumentArray = new ArrayList<>();
        stringCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"world"}, 0);
        assertThat(argumentArray.size(), is(1));
        assertThat(argumentArray.get(0), instanceOf(String.class));
        assertThat(argumentArray.get(0), is("world"));
    }

    @Test(expected = CommandParseException.class)
    public void testCommandExecuteNonNumberArgument() {
        intCommandPart.generateArgumentArray(new ArrayList<>(), new TestCommandSender(), new String[]{"world"}, 0);
    }

    @Test
    public void testCommandExecuteValidNumberArgument() {
        List<Object> argumentArray = new ArrayList<>();
        intCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"0"}, 0);
        assertThat(argumentArray.size(), is(1));
        assertThat(argumentArray.get(0), instanceOf(int.class));
        assertThat(argumentArray.get(0), is(0));
    }

    @Test
    public void testChainedCommandExecuteValidArgument() {
        List<Object> argumentArray = new ArrayList<>();
        chainedCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello", "0"}, 0);
        assertThat(argumentArray.size(), is(2));
        assertThat(argumentArray.get(0), instanceOf(String.class));
        assertThat(argumentArray.get(0), is("hello"));
        assertThat(argumentArray.get(1), instanceOf(int.class));
        assertThat(argumentArray.get(1), is(0));
    }

    @Test
    public void testChainedCommandTabComplete() {
        List<String> tabCompletes = new ArrayList<>();
        chainedCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{""}, 0);
        assertThat(tabCompletes.size(), is(2));
        assertThat(tabCompletes.get(0), is("hello"));
        assertThat(tabCompletes.get(1), is("world"));
    }

    @Test
    public void testChainedCommandTabCompleteOther() {
        List<String> tabCompletes = new ArrayList<>();
        chainedCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello", ""}, 0);
        assertThat(tabCompletes.size(), is(0));
    }

    @Test
    public void testVarArgsCommandTabComplete() {
        List<String> tabCompletes = new ArrayList<>();
        varArgCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello"}, 0);
        assertThat(tabCompletes.size(), is(2));
        assertThat(tabCompletes.get(0), is("hello"));
        assertThat(tabCompletes.get(1), is("world"));
    }

    @Test
    public void testVarArgsCommandTabCompleteDeeper() {
        List<String> tabCompletes = new ArrayList<>();
        varArgCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello", "world", "hello", "world"}, 0);
        System.out.println(tabCompletes);
        assertThat(tabCompletes.size(), is(2));
        assertThat(tabCompletes.get(0), is("hello"));
        assertThat(tabCompletes.get(1), is("world"));
    }

    @Test
    public void testVarArgsCommandArgumentParsing() {
        List<Object> argumentArray = new ArrayList<>();
        varArgCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello"}, 0);
        assertThat(argumentArray.size(), is(1));
        assertThat(argumentArray.get(0), instanceOf(String[].class));
        assertThat((String[]) argumentArray.get(0), arrayWithSize(1));
        assertThat((String[]) argumentArray.get(0), is(new String[]{"hello"}));
    }

    @Test
    public void testVarArgsCommandArgumentParsingDeeper() {
        List<Object> argumentArray = new ArrayList<>();
        varArgCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello", "world", "hello", "world"}, 0);
        assertThat(argumentArray.size(), is(1));
        assertThat(argumentArray.get(0), instanceOf(String[].class));
        assertThat((String[]) argumentArray.get(0), arrayWithSize(4));
        assertThat((String[]) argumentArray.get(0), is(new String[]{"hello", "world", "hello", "world"}));
    }

    @Test
    public void testGuardCommandExecute() {
        List<Object> argumentArray = new ArrayList<>();
        simpleGuardPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello"}, 0);
        assertThat(argumentArray.size(), is(1));
    }

    @Test(expected = CommandNoHelpException.class)
    public void testGuardGuardCheck() {
        simpleGuardPart.guardCheck(new TestCommandSender(), new String[]{"hello"}, 0);
    }

    @Test
    public void testGuardCommandExecuteValid() {
        List<Object> argumentArray = new ArrayList<>();
        simpleGuardPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"world"}, 0);
        assertThat(argumentArray.size(), is(1));
    }

    @Test
    public void testGuardGuardCheckValid() {
        boolean guardResult = simpleGuardPart.guardCheck(new TestCommandSender(), new String[]{"world"}, 0);
        assertThat(guardResult, is(true));
    }

    @Test
    public void testOptionalCommandPartTabComplete() {
        List<String> tabCompletes = new ArrayList<>();
        optionalCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{""}, 0);
        assertThat(tabCompletes.size(), is(4));
        assertThat(tabCompletes.get(0), is("hello"));
        assertThat(tabCompletes.get(1), is("world"));
        assertThat(tabCompletes.get(2), is("hello2"));
        assertThat(tabCompletes.get(3), is("world2"));
    }

    @Test
    public void testOptionalCommandPartTabCompleteSecond() {
        List<String> tabCompletes = new ArrayList<>();
        optionalCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello", ""}, 0);
        assertThat(tabCompletes.size(), is(2));
        assertThat(tabCompletes.get(0), is("hello2"));
        assertThat(tabCompletes.get(1), is("world2"));
    }

    @Test(expected = CommandParseException.class)
    public void testOptionalCommandPartExecution() {
        optionalCommandPart.generateArgumentArray(new ArrayList<>(), new TestCommandSender(), new String[]{""}, 0);
    }

    @Test
    public void testOptionalCommandPartExecutionValid() {
        List<Object> argumentArray = new ArrayList<>();
        optionalCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello2"}, 0);
        assertThat(argumentArray.size(), is(2));
        assertThat(argumentArray.get(0), is("hello"));
        assertThat(argumentArray.get(1), is("hello2"));
    }

    @Test(expected = CommandParseException.class)
    public void testOptionalCommandPartExecutionInvalid() {
        optionalCommandPart.generateArgumentArray(new ArrayList<>(), new TestCommandSender(), new String[]{"hello"}, 0);
    }

    @Test
    public void testOptionalCommandPartExecutionFullyValid() {
        List<Object> argumentArray = new ArrayList<>();
        optionalCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"world", "hello2"}, 0);
        assertThat(argumentArray.size(), is(2));
        assertThat(argumentArray.get(0), is("world"));
        assertThat(argumentArray.get(1), is("hello2"));
    }

    @Test
    public void testOptionalCommandPartExecutionMultipleNext() {
        List<Object> argumentArray = new ArrayList<>();
        optionalCommandPartMultipleNext.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"world", "hello2", "hello3"}, 0);
        assertThat(argumentArray.size(), is(3));
        assertThat(argumentArray.get(0), is("world"));
        assertThat(argumentArray.get(1), is("hello2"));
        assertThat(argumentArray.get(2), is("hello3"));
    }

    @Test
    public void testOptionalCommandPartExecutionMultipleTabComplete() {
        List<String> tabCompletes = new ArrayList<>();
        optionalCommandPartMultipleNext.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{""}, 0);
        assertThat(tabCompletes.size(), is(4));
        assertThat(tabCompletes.get(0), is("hello"));
        assertThat(tabCompletes.get(1), is("world"));
        assertThat(tabCompletes.get(2), is("hello2"));
        assertThat(tabCompletes.get(3), is("world2"));

        tabCompletes = new ArrayList<>();
        optionalCommandPartMultipleNext.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello", ""}, 0);
        assertThat(tabCompletes.size(), is(2));
        assertThat(tabCompletes.get(0), is("hello2"));
        assertThat(tabCompletes.get(1), is("world2"));

        tabCompletes = new ArrayList<>();
        optionalCommandPartMultipleNext.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello", "world2", ""}, 0);
        assertThat(tabCompletes.size(), is(2));
        assertThat(tabCompletes.get(0), is("hello3"));
        assertThat(tabCompletes.get(1), is("world3"));

        tabCompletes = new ArrayList<>();
        optionalCommandPartMultipleNext.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"world2", ""}, 0);
        assertThat(tabCompletes.size(), is(2));
        assertThat(tabCompletes.get(0), is("hello3"));
        assertThat(tabCompletes.get(1), is("world3"));
    }
}