package jmri.implementation;

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

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import jmri.InstanceManager;
import jmri.NamedBean;
import jmri.NamedBeanHandle;
import jmri.SignalHead;
import jmri.SignalMast;
import jmri.util.JUnitUtil;

import org.junit.jupiter.api.*;

/**
 * Tests for the SignalAppearanceMap interface.
 *
 * @author Bob Jacobsen Copyright (C) 2009
 */
public class DefaultSignalAppearanceMapTest {

    private SignalHead h1;
    private SignalHead h2;

    private List<NamedBeanHandle<SignalHead>> l1;
    private List<NamedBeanHandle<SignalHead>> l2;

    @Test
    public void testCtor() {
        DefaultSignalAppearanceMap map = new DefaultSignalAppearanceMap("sys", "user");
        assertNotNull(map);
    }

    @Test
    public void testSearchOrder() throws IOException {
        try {  // need try-finally to ensure junk deleted from user area
            SignalSystemTestUtil.createMockSystem();

            // check that mock (test directory) system is present
            InstanceManager.getDefault(jmri.SignalMastManager.class)
                    .provideSignalMast("IF$shsm:" + SignalSystemTestUtil.getMockSystemName() + ":one-searchlight:IH1");

        } finally {
            SignalSystemTestUtil.deleteMockSystem();
        }
    }

    @Test
    public void testDefaultMap() {
        SignalMast s = InstanceManager.getDefault(jmri.SignalMastManager.class).provideSignalMast("IF$shsm:basic:one-searchlight:IH1");
        DefaultSignalAppearanceMap t = (DefaultSignalAppearanceMap) s.getAppearanceMap();
        t.loadDefaults();

        s.setAspect("Stop");
        assertEquals( SignalHead.RED, h1.getAppearance(),
                "Stop is RED");

        s.setAspect("Approach");
        assertEquals( SignalHead.YELLOW, h1.getAppearance(),
                "Approach is YELLOW");

        s.setAspect("Clear");
        assertEquals( SignalHead.GREEN, h1.getAppearance(),
                "Clear is GREEN");

        InstanceManager.getDefault(jmri.SignalMastManager.class).deregister(s);
        s.dispose();
    }

    @Test
    public void testDefaultAspects() {
        DefaultSignalAppearanceMap t = new DefaultSignalAppearanceMap("sys", "user");
        t.loadDefaults();

        java.util.Enumeration<String> e = t.getAspects();

        assertEquals("Stop", e.nextElement());
        assertEquals("Approach", e.nextElement());
        assertEquals("Clear", e.nextElement());

        assertFalse(e.hasMoreElements());
    }

    @Test
    public void testTwoHead() {

        SignalMast s = new SignalHeadSignalMast("IF$shsm:basic:two-searchlight:IH1:IH2") {
            @Override
            protected void configureAspectTable(String signalSystemName, String aspectMapName) {
                map = new DefaultSignalAppearanceMap("sys", "user");
            }
        };

        DefaultSignalAppearanceMap t = (DefaultSignalAppearanceMap) s.getAppearanceMap();
        t.addAspect("meh", new int[]{SignalHead.LUNAR, SignalHead.DARK});
        t.addAspect("biff", new int[]{SignalHead.GREEN, SignalHead.GREEN});

        s.setAspect("meh");
        assertEquals( SignalHead.LUNAR, h1.getAppearance(),
                "meh 1 is LUNAR");
        assertEquals( SignalHead.DARK, h2.getAppearance(),
                "meh 2 is LUNAR");

        s.setAspect("biff");
        assertEquals( SignalHead.GREEN, h1.getAppearance(),
                "biff 1 is GREEN");
        assertEquals( SignalHead.GREEN, h2.getAppearance(),
                "biff 2 is GREEN");

        InstanceManager.getDefault(jmri.SignalMastManager.class).deregister(s);
        s.dispose();
    }

    @Test
    public void testGetState() {
        DefaultSignalAppearanceMap map = new DefaultSignalAppearanceMap("sys", "user");
        assertEquals(NamedBean.INCONSISTENT, map.getState());
    }

    @Test
    public void testSetState() {
        DefaultSignalAppearanceMap map = new DefaultSignalAppearanceMap("sys", "user");
        map.setState(NamedBean.UNKNOWN);
        // verify getState did not change
        assertEquals(NamedBean.INCONSISTENT, map.getState());
    }

    @BeforeEach
    public void setUp() {
        JUnitUtil.setUp();        
        JUnitUtil.initInternalSignalHeadManager();
        h1 = new DefaultSignalHead("IH1", "head1") {
            @Override
            protected void updateOutput() {
            }
        };
        h2 = new DefaultSignalHead("IH2", "head2") {
            @Override
            protected void updateOutput() {
            }
        };
        l1 = new ArrayList<>();
        l1.add(new NamedBeanHandle<>("IH1", h1));
        l2 = new ArrayList<>();
        l2.add(new NamedBeanHandle<>("IH1", h1));
        l2.add(new NamedBeanHandle<>("IH2", h2));
        InstanceManager.getDefault(jmri.SignalHeadManager.class).register(h1);
        InstanceManager.getDefault(jmri.SignalHeadManager.class).register(h2);
    }

    @AfterEach
    public void tearDown() {
        InstanceManager.getDefault(jmri.SignalHeadManager.class).deregister(h1);
        h1.dispose();
        h1 = null;
        InstanceManager.getDefault(jmri.SignalHeadManager.class).deregister(h2);
        h2.dispose();
        h2 = null;
        l1 = null;
        l2 = null;
        JUnitUtil.tearDown();
    }
    
}