/*
 * Copyright 2009 Phil Burk, Mobileer Inc
 *
 * 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 com.jsyn.unitgen;

import com.jsyn.engine.SynthesisEngine;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;

public class TestEnable {
    private SynthesisEngine synthesisEngine;

    @BeforeEach
    protected void beforeEach() {
        synthesisEngine = new SynthesisEngine();
        synthesisEngine.setRealTime(false);
    }

    @AfterEach
    protected void afterEach() {
        synthesisEngine.stop();
    }

    @Test
    public void testEnablingGate() throws InterruptedException {
        LinearRamp ramp = new LinearRamp();
        synthesisEngine.add(ramp);
        EnablingGate enabler = new EnablingGate();
        synthesisEngine.add(enabler);
        Add adder = new Add();
        synthesisEngine.add(adder);

        ramp.output.connect(enabler.input);
        enabler.output.connect(adder.inputA);

        // set up so ramp should equal time
        ramp.current.set(0.0);
        ramp.input.set(1.0);
        ramp.time.set(1.0);
        enabler.gate.set(1.0);

        synthesisEngine.start();
        double startTime = synthesisEngine.getCurrentTime();
        // pull from final adder
        adder.start();
        synthesisEngine.sleepUntil(startTime + 0.1);
        double tolerance = 0.002;
        assertEquals(0.1, ramp.output.getValue(), tolerance, "ramp going up");
        assertEquals(0.1, enabler.output.getValue(), tolerance, "enabler going up");
        assertEquals(0.1, adder.output.getValue(), tolerance, "adder going up");
        synthesisEngine.sleepUntil(startTime + 0.2);
        assertEquals(0.2, adder.output.getValue(), tolerance, "start enabled");

        // disable everything upstream
        enabler.gate.set(0.0);

        synthesisEngine.sleepUntil(startTime + 0.3);
        assertEquals(0.2, ramp.output.getValue(), tolerance, "should not be pulled");
        assertFalse(enabler.isEnabled(), "should be disabled");
        assertEquals(0.0, enabler.output.getValue(), tolerance, "should be zero");
        assertEquals(0.0, adder.output.getValue(), tolerance, "zero");

    }
}