/*

 * Copyright (c) 2019, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.jpackage.test;

import java.lang.reflect.Method;

import java.nio.file.Files;

import java.util.Collections;

import java.util.List;

import java.util.stream.Collectors;

import java.util.stream.Stream;

import jdk.jpackage.test.Functional.ThrowingConsumer;

import jdk.jpackage.test.Functional.ThrowingFunction;

import jdk.jpackage.test.Functional.ThrowingRunnable;

import jdk.jpackage.test.Functional.ThrowingSupplier;

class TestInstance implements ThrowingRunnable {

    static class TestDesc {

        private TestDesc() {

        }

        String testFullName() {

            StringBuilder sb = new StringBuilder();

            sb.append(clazz.getSimpleName());

            if (functionName != null) {

                sb.append('.');

                sb.append(functionName);

                if (args != null) {

                    sb.append('(').append(args).append(')');

                }

            }

            return sb.toString();

        }

        private Class clazz;

        private String functionName;

        private String args;

        private static TestDesc create() {

            TestDesc desc = new TestDesc();

            desc.clazz = enclosingMainMethodClass();

            return desc;

        }

        static TestDesc create(Method m, Object... args) {

            TestDesc desc = new TestDesc();

            desc.clazz = m.getDeclaringClass();

            desc.functionName = m.getName();

            if (args.length != 0) {

                desc.args = Stream.of(args).map(Object::toString).collect(

                        Collectors.joining(","));

            }

            return desc;

        }

    }

    TestInstance(ThrowingRunnable testBody) {

        assertCount = 0;

        this.testConstructor = (unused) -> null;

        this.testBody = (unused) -> testBody.run();

        this.beforeActions = Collections.emptyList();

        this.afterActions = Collections.emptyList();

        this.testDesc = TestDesc.create();

    }

    TestInstance(ThrowingFunction testConstructor, MethodCall testBody,

            List<ThrowingConsumer> beforeActions,

            List<ThrowingConsumer> afterActions) {

        assertCount = 0;

        this.testConstructor = testConstructor;

        this.testBody = testBody;

        this.beforeActions = beforeActions;

        this.afterActions = afterActions;

        this.testDesc = testBody.createDescription();

    }

    void notifyAssert() {

        assertCount++;

    }

    boolean passed() {

        return success;

    }

    String functionName() {

        return testDesc.functionName;

    }

    String baseName() {

        return testDesc.clazz.getSimpleName();

    }

    String fullName() {

        return testDesc.testFullName();

    }

    @Override

    public void run() throws Throwable {

        final String fullName = testDesc.testFullName();

        TKit.log(String.format("[ RUN      ] %s", fullName));

        try {

            Object testInstance = testConstructor.apply(testBody);

            beforeActions.forEach((a) -> ThrowingConsumer.toConsumer(a).accept(

                    testInstance));

            Files.createDirectories(TKit.workDir());

            try {

                testBody.accept(testInstance);

            } finally {

                afterActions.forEach(a -> TKit.ignoreExceptions(() -> a.accept(

                        testInstance)));

            }

            success = true;

        } finally {

            TKit.log(String.format("%s %s; checks=%d",

                    success ? "[       OK ]" : "[  FAILED  ]", fullName,

                    assertCount));

        }

    }

    private static Class enclosingMainMethodClass() {

        StackTraceElement st[] = Thread.currentThread().getStackTrace();

        for (StackTraceElement ste : st) {

            if ("main".equals(ste.getMethodName())) {

                return Functional.ThrowingSupplier.toSupplier(() -> Class.forName(

                        ste.getClassName())).get();

            }

        }

        return null;

    }

    private int assertCount;

    private boolean success;

    private final TestDesc testDesc;

    private final ThrowingFunction testConstructor;

    private final ThrowingConsumer testBody;

    private final List<ThrowingConsumer> beforeActions;

    private final List<ThrowingConsumer> afterActions;

}