/*
 * Copyright 2018 the original author or authors.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gradle.api.internal.tasks.timeout;

import org.gradle.internal.concurrent.ManagedScheduledExecutor;
import org.gradle.internal.concurrent.Stoppable;

import java.time.Duration;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

public class DefaultTimeoutHandler implements TimeoutHandler, Stoppable {
    private final ManagedScheduledExecutor executor;

    public DefaultTimeoutHandler(ManagedScheduledExecutor executor) {
        this.executor = executor;
    }

    @Override
    public Timeout start(Thread taskExecutionThread, Duration timeout) {
        long timeoutMillis = timeout.toMillis();
        long limit = System.currentTimeMillis() + timeoutMillis;
        InterruptOnTimeout interrupter = new InterruptOnTimeout(taskExecutionThread, limit);
        ScheduledFuture<?> periodicCheck = executor.scheduleAtFixedRate(interrupter, timeoutMillis, 50, TimeUnit.MILLISECONDS);
        return new DefaultTimeout(interrupter, periodicCheck);
    }

    @Override
    public void stop() {
        executor.stop();
    }

    private static final class DefaultTimeout implements Timeout {

        private final InterruptOnTimeout interrupter;
        private final ScheduledFuture<?> periodicCheck;

        private DefaultTimeout(InterruptOnTimeout interrupter, ScheduledFuture<?> periodicCheck) {
            this.interrupter = interrupter;
            this.periodicCheck = periodicCheck;
        }

        @Override
        public void stop() {
            periodicCheck.cancel(true);
        }

        @Override
        public boolean timedOut() {
            return interrupter.timedOut;
        }
    }

    private static class InterruptOnTimeout implements Runnable {
        private final Thread thread;
        private final long limit;

        private volatile boolean timedOut;

        private InterruptOnTimeout(Thread thread, long limit) {
            this.thread = thread;
            this.limit = limit;
        }

        @Override
        public void run() {
            if (timedOut) {
                return;
            }
            if (System.currentTimeMillis() > limit) {
                timedOut = true;
                thread.interrupt();
            }
        }
    }
}

@@ -1213,122 +1213,8 @@
 ) %7B%0A
-        long timeoutMillis = timeout.toMillis();%0A        long limit = System.currentTimeMillis() + timeoutMillis;%0A
     
@@ -1296,15 +1296,8 @@
 read
-, limit
 );%0A 
@@ -1322,28 +1322,26 @@
 ture%3C?%3E 
-periodicChec
+timeoutTas
 k = exec
@@ -1357,19 +1357,8 @@
 dule
-AtFixedRate
 (int
@@ -1378,18 +1378,19 @@
 eout
+.to
 Millis
-, 50
+()
 , Ti
@@ -1449,33 +1449,18 @@
 out(
-interrupter, periodicChec
+timeoutTas
 k);%0A
@@ -1607,63 +1607,8 @@
 ut %7B
-%0A%0A        private final InterruptOnTimeout interrupter;
 %0A   
@@ -1645,28 +1645,26 @@
 ture%3C?%3E 
-periodicChec
+timeoutTas
 k;%0A%0A    
@@ -1694,40 +1694,8 @@
 out(
-InterruptOnTimeout interrupter, 
 Sche
@@ -1709,28 +1709,26 @@
 ture%3C?%3E 
-periodicChec
+timeoutTas
 k) %7B%0A   
@@ -1745,80 +1745,32 @@
 his.
-interrupter = interrupter;%0A            this.periodicCheck = periodicChec
+timeoutTask = timeoutTas
 k;%0A 
@@ -1842,20 +1842,18 @@
     
-periodicChec
+timeoutTas
 k.ca
@@ -1952,28 +1952,58 @@
 urn 
-interrupter.timedOut
+timeoutTask.isDone() && !timeoutTask.isCancelled()
 ;%0A  
@@ -2123,86 +2123,8 @@
 ead;
-%0A        private final long limit;%0A%0A        private volatile boolean timedOut;
 %0A%0A  
@@ -2173,20 +2173,8 @@
 read
-, long limit
 ) %7B%0A
@@ -2211,40 +2211,8 @@
 ad;%0A
-            this.limit = limit;%0A
     
@@ -2268,165 +2268,8 @@
 ) %7B%0A
-            if (timedOut) %7B%0A                return;%0A            %7D%0A            if (System.currentTimeMillis() %3E limit) %7B%0A                timedOut = true;%0A    
     
@@ -2300,22 +2300,8 @@
 ();%0A
-            %7D%0A
     

Simplify TimeoutHandler