/*

 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 * questions.

 */

/*

 * @test

 * @summary Test Completion

 * @modules jdk.internal.le/jdk.internal.jline

 *          jdk.internal.le/jdk.internal.jline.console

 *          jdk.internal.le/jdk.internal.jline.console.history

 *          jdk.internal.le/jdk.internal.jline.extra

 * @build HistoryTest

 * @run testng HistoryTest

 */

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.util.Arrays;

import java.util.Collection;

import java.util.Collections;

import java.util.concurrent.atomic.AtomicBoolean;

import jdk.internal.jline.UnsupportedTerminal;

import jdk.internal.jline.console.ConsoleReader;

import jdk.internal.jline.console.history.MemoryHistory;

import jdk.internal.jline.extra.EditingHistory;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

@Test

public class HistoryTest {

    public void testHistory() throws IOException {

        ConsoleReader in = new ConsoleReader(new ByteArrayInputStream(new byte[0]), new ByteArrayOutputStream(), new UnsupportedTerminal());

        AtomicBoolean complete = new AtomicBoolean();

        EditingHistory history = new EditingHistory(in, Collections.emptyList()) {

            @Override

            protected boolean isComplete(CharSequence input) {

                return complete.get();

            }

        };

        complete.set(false); history.add("void test() {");

        complete.set(false); history.add("    System.err.println(1);");

        complete.set(true);  history.add("}");

        complete.set(true);  history.add("/exit");

        previousAndAssert(history, "/exit");

        history.previous(); history.previous(); history.previous();

        complete.set(false); history.add("void test() { /*changed*/");

        complete.set(true);

        previousAndAssert(history, "}");

        previousAndAssert(history, "    System.err.println(1);");

        previousAndAssert(history, "void test() {");

        assertFalse(history.previous());

        nextAndAssert(history, "    System.err.println(1);");

        nextAndAssert(history, "}");

        nextAndAssert(history, "");

        complete.set(false); history.add("    System.err.println(2);");

        complete.set(true);  history.add("} /*changed*/");

        assertEquals(history.size(), 7);

        Collection<? extends String> persistentHistory = history.save();

        history = new EditingHistory(in, persistentHistory) {

            @Override

            protected boolean isComplete(CharSequence input) {

                return complete.get();

            }

        };

        previousSnippetAndAssert(history, "void test() { /*changed*/");

        previousSnippetAndAssert(history, "/exit");

        previousSnippetAndAssert(history, "void test() {");

        assertFalse(history.previousSnippet());

        nextSnippetAndAssert(history, "/exit");

        nextSnippetAndAssert(history, "void test() { /*changed*/");

        nextSnippetAndAssert(history, "");

        assertFalse(history.nextSnippet());

        complete.set(false); history.add("{");

        complete.set(true);  history.add("}");

        persistentHistory = history.save();

        history = new EditingHistory(in, persistentHistory) {

            @Override

            protected boolean isComplete(CharSequence input) {

                return complete.get();

            }

        };

        previousSnippetAndAssert(history, "{");

        previousSnippetAndAssert(history, "void test() { /*changed*/");

        previousSnippetAndAssert(history, "/exit");

        previousSnippetAndAssert(history, "void test() {");

        while (history.next());

        complete.set(true);  history.add("/*current1*/");

        complete.set(true);  history.add("/*current2*/");

        complete.set(true);  history.add("/*current3*/");

        assertEquals(history.currentSessionEntries(), Arrays.asList("/*current1*/", "/*current2*/", "/*current3*/"));

        history.remove(0);

        assertEquals(history.currentSessionEntries(), Arrays.asList("/*current1*/", "/*current2*/", "/*current3*/"));

        while (history.size() > 2)

            history.remove(0);

        assertEquals(history.currentSessionEntries(), Arrays.asList("/*current2*/", "/*current3*/"));

        for (int i = 0; i < MemoryHistory.DEFAULT_MAX_SIZE * 2; i++) {

            complete.set(true);  history.add("/exit");

        }

        complete.set(false); history.add("void test() { /*after full*/");

        complete.set(false); history.add("    System.err.println(1);");

        complete.set(true);  history.add("}");

        previousSnippetAndAssert(history, "void test() { /*after full*/");

    }

    private void previousAndAssert(EditingHistory history, String expected) {

        assertTrue(history.previous());

        assertEquals(history.current().toString(), expected);

    }

    private void nextAndAssert(EditingHistory history, String expected) {

        assertTrue(history.next());

        assertEquals(history.current().toString(), expected);

    }

    private void previousSnippetAndAssert(EditingHistory history, String expected) {

        assertTrue(history.previousSnippet());

        assertEquals(history.current().toString(), expected);

    }

    private void nextSnippetAndAssert(EditingHistory history, String expected) {

        assertTrue(history.nextSnippet());

        assertEquals(history.current().toString(), expected);

    }

}