/*
 * Copyright 2021, TeamDev. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.server.aggregate.given.thermometer;

import io.spine.core.External;
import io.spine.server.aggregate.Aggregate;
import io.spine.server.aggregate.Apply;
import io.spine.server.aggregate.given.thermometer.event.TemperatureChanged;
import io.spine.server.aggregate.given.thermometer.event.TermTemperatureChanged;
import io.spine.server.event.React;

import java.util.Optional;

/**
 * Sets the temperature to self {@link #MIN}/{@link #MAX} value without going crazy.
 */
public final class SafeThermometer extends Aggregate<ThermometerId, Thermometer, Thermometer.Builder> {

    private static final double MIN = 0;
    private static final double MAX = 120;

    @React
    Optional<TermTemperatureChanged> on(@External TemperatureChanged e) {
        double temperature = e.getFahrenheit();
        if (!withinBounds(temperature)) {
            return Optional.empty();
        }
        return Optional.of(
                TermTemperatureChanged
                        .newBuilder()
                        .setThermometer(id())
                        .setChange(
                                TemperatureChange
                                        .newBuilder()
                                        .setNewValue(temperature)
                                        .setPreviousValue(state().getFahrenheit())
                        )
                        .vBuild()
        );
    }

    private static boolean withinBounds(double temperature) {
        return temperature > MIN && temperature < MAX;
    }

    @Apply
    private void on(TermTemperatureChanged e) {
        builder().setFahrenheit(e.getChange()
                                 .getNewValue());
    }
}

@@ -1639,16 +1639,15 @@
 %0A * 
-Sets the
+Ignores
  tem
@@ -1659,67 +1659,37 @@
 ure 
-to self %7B@link #MIN%7D/%7B@link #MAX%7D valu
+changes outsid
 e 
-w
 it
-hout going crazy
+s own range
 .%0A *

Fix the aggregate doc.