/*
 * 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;

import de.steamwar.command.CommandFrameworkException;
import de.steamwar.command.Handler;
import de.steamwar.command.impl.ExecutionIdentifier;
import de.steamwar.command.impl.TestCommand;
import lombok.AllArgsConstructor;
import lombok.experimental.UtilityClass;

import java.util.Arrays;
import java.util.List;

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

@UtilityClass
public class AssertionUtils {

    @AllArgsConstructor
    public static class SimpleAssertion<T extends TestCommand> {

        private T value;

        public SimpleAssertion<T> assertNoInitialize(String message) {
            try {
                value.initialize();
            } catch (UnsupportedOperationException e) {
                if (e.getCause() == null) {
                    assertThat(e.getMessage(), is(message));
                } else {
                    assertThat(e.getCause(), instanceOf(Handler.HandlerException.class));
                    assertThat(e.getCause().getMessage(), is(message));
                }
            } catch (Exception e) {
                error(value.getClass().getSimpleName() + " had an unexpected error while initializing");
            }
            return this;
        }

        public SimpleAssertion<T> assertExecute(String message, String... arguments) {
            try {
                value.execute("", "", arguments);
                error(value.getClass().getSimpleName() + " was not parsed.");
            } catch (Exception e) {
                assertCMDFramework(e, ExecutionIdentifier.class, message);
            }
            return this;
        }

        public SimpleAssertion<T> assertNoExecute(String... arguments) {
            try {
                value.execute("", "", arguments);
            } catch (Exception e) {
                error(value.getClass().getSimpleName() + " was parsed. It should not have been.", e);
            }
            return this;
        }

        public SimpleAssertion<T> assertTabCompletion(String[] expectedTabCompletions, String... arguments) {
            return assertTabCompletion("", expectedTabCompletions, arguments);
        }

        public SimpleAssertion<T> assertTabCompletion(String sender, String[] expectedTabCompletions, String... arguments) {
            try {
                List<String> tabCompletions = value.tabComplete(sender, "", arguments);
                assertTabCompletes(tabCompletions, expectedTabCompletions);
            } catch (Exception e) {
                error(value.getClass().getSimpleName() + " tab-completion failed.", e);
            }
            return this;
        }
    }

    public static SimpleAssertion<TestCommand> with(Object... commandObjects) {
        return new SimpleAssertion<>(new TestCommand(stringCommandLoader -> {
            for (Object commandObject : commandObjects) {
                stringCommandLoader.add(commandObject);
            }
        }));
    }

    public static void error(String message) {
        throw new AssertionError(message);
    }

    public static void error(String message, Throwable cause) {
        throw new AssertionError(message, cause);
    }

    public static void assertCMDFramework(Exception e, Class<?> clazz, String message) {
        if (clazz.isInstance(e)) {
            assertThat(e.getMessage(), is(message));
        } else {
            assertThat(e, is(instanceOf(CommandFrameworkException.class)));
            assertThat(e.getCause().getCause(), is(instanceOf(clazz)));
            assertThat(e.getCause().getCause().getMessage(), is(message));
        }
    }

    public static <T> void assertTabCompletes(List<T> list, T... elements) {
        assertThat(Arrays.asList(elements) + " -> " + list, list.size(), is(elements.length));
        if (elements.length > 0) {
            assertThat(list, containsInAnyOrder(elements));
        }
    }
}