/*

 * Copyright (c) 2013, 2018, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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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package jdk.test.lib.jfr;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

import jdk.jfr.ValueDescriptor;

import jdk.jfr.consumer.RecordedObject;

import jdk.test.lib.Asserts;

public final class EventField {

    public final RecordedObject event;

    public final ValueDescriptor desc;

    public EventField(RecordedObject event, ValueDescriptor valueDescriptor) {

        this.event = event;

        this.desc = valueDescriptor;

    }

    @SuppressWarnings("unchecked")

    public <T extends Comparable<T>> boolean isEqual(T value) {

        return value == (T)getValue();

    }

    @SuppressWarnings("unchecked")

    public <T extends Comparable<T>> EventField equal(T value) {

        doAssert(()-> Asserts.assertEquals((T)getValue(), value, getErrMsg("Value not equal to " + value)));

        return this;

    }

    @SuppressWarnings("unchecked")

    public <T extends Comparable<T>> EventField notEqual(T value) {

        doAssert(()-> Asserts.assertNotEquals((T)getValue(), value, getErrMsg("Value equal to " + value)));

        return this;

    }

    @SuppressWarnings("unchecked")

    public <T extends Comparable<T>> EventField above(T value) {

        doAssert(()-> Asserts.assertGreaterThan((T)getValue(), value, getErrMsg("Value not above " + value)));

        return this;

    }

    @SuppressWarnings("unchecked")

    public <T extends Comparable<T>> EventField below(T value) {

        doAssert(()-> Asserts.assertLessThan((T)getValue(), value, getErrMsg("Value not below " + value)));

        return this;

    }

    @SuppressWarnings("unchecked")

    public <T extends Comparable<T>> EventField atLeast(T value) {

        doAssert(()-> Asserts.assertGreaterThanOrEqual((T)getValue(), value, getErrMsg("Value not atLeast" + value)));

        return this;

    }

    @SuppressWarnings("unchecked")

    public <T extends Comparable<T>> EventField atMost(T value) {

        doAssert(()-> Asserts.assertLessThanOrEqual((T)getValue(), value, getErrMsg("Value not atMost " + value)));

        return this;

    }

    public <T extends Comparable<T>> EventField instring(String part) {

        final String value = getValue();

        doAssert(()-> Asserts.assertTrue(value.contains(part), getErrMsg("Value does not contain '" + part +"'")));

        return this;

    }

    @SuppressWarnings("unchecked")

    public <T> T getValue() {

        return (T)event.getValue(desc.getName());

    }

    public EventField notNull() {

        doAssert(()-> Asserts.assertNotNull(getValue(), getErrMsg("Field is null")));

        return this;

    }

    public EventField isNull() {

        doAssert(()-> Asserts.assertNull(getValue(), getErrMsg("Field is not null")));

        return this;

    }

    public EventField notEmpty() {

        notNull();

        final String s = getValue();

        doAssert(()-> Asserts.assertFalse(s.isEmpty(), getErrMsg("Field is empty")));

        return this;

    }

    private void doAssert(AssertFunction f) {

        try {

            f.doAssert();

        } catch (RuntimeException e) {

            System.out.printf("Error: %s%nFailed event:%n%s%n", e.getMessage(), event.toString());

            throw e;

        }

    }

    public EventField containsAny(String... allowed) {

        final String value = getValue();

        final List<String> allowedValues = Arrays.asList(allowed);

        boolean contains = false;

        for(String allowedValue : allowed) {

            if (value.contains(allowedValue))  {

                contains = true;

            }

        }

        if (!contains) {

            doAssert(()-> Asserts.fail(getErrMsg(String.format("Value not in (%s)",

                allowedValues.stream().collect(Collectors.joining(", "))))));

        }

        return this;

    }

    private String getErrMsg(String msg) {

        final String name = desc.getName();

        final Object value = event.getValue(name);

        return String.format("%s, field='%s', value='%s'", msg, name, value);

    }

    @FunctionalInterface

    public interface AssertFunction {

        void doAssert();

    }

}