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package net.java.html.json;

import net.java.html.BrwsrCtx;

import java.io.IOException;

import java.io.InputStream;

import java.lang.reflect.InvocationTargetException;

import java.util.HashMap;

import java.util.Map;

import org.apidesign.html.context.spi.Contexts;

import org.apidesign.html.json.spi.FunctionBinding;

import org.apidesign.html.json.spi.JSONCall;

import org.apidesign.html.json.spi.PropertyBinding;

import org.apidesign.html.json.spi.Technology;

import org.apidesign.html.json.spi.Transfer;

import org.testng.annotations.BeforeMethod;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

/**

 *

 * @author Jaroslav Tulach

 */

public class MapModelTest {

    private MapTechnology t;

    private BrwsrCtx c;

    @BeforeMethod public void initTechnology() {

        t = new MapTechnology();

        c = Contexts.newBuilder().register(Technology.class, t, 1).

            register(Transfer.class, t, 1).build();

    }

    @Test public void isThereABinding() throws Exception {

        Person p = Models.bind(new Person(), c).applyBindings();

        p.setFirstName("Jarda");

        Map m = (Map)Models.toRaw(p);

        Object v = m.get("firstName");

        assertNotNull(v, "Value should be in the map");

        assertEquals(v.getClass(), One.class, "It is instance of One");

        One o = (One)v;

        assertEquals(o.changes, 1, "One change so far");

        assertFalse(o.pb.isReadOnly(), "Mutable property");

        assertEquals(o.get(), "Jarda", "Value should be in the map");

        o.set("Karle");

        assertEquals(p.getFirstName(), "Karle", "Model value updated");

        assertEquals(o.changes, 2, "Snd change");

    }

    @Test public void dontNotifySameProperty() throws Exception {

        Person p = Models.bind(new Person(), c);

        p.setFirstName("Jirka");

        Map m = (Map)Models.toRaw(p);

        Object v = m.get("firstName");

        assertNotNull(v, "Value should be in the map");

        assertEquals(v.getClass(), One.class, "It is instance of One");

        One o = (One)v;

        assertEquals(o.changes, 0, "No change so far the only one change happened before we connected");

        p.setFirstName(new String("Jirka"));

        assertEquals(o.changes, 0, "No change so far, the value is the same");

        p.setFirstName("Jarda");

        assertFalse(o.pb.isReadOnly(), "Mutable property");

        assertEquals(o.get(), "Jarda", "Value should be in the map");

        o.set("Karle");

        assertEquals(p.getFirstName(), "Karle", "Model value updated");

        assertEquals(o.changes, 2, "Snd change");

    }

    @Test public void canSetEnumAsString() throws Exception {

        Person p = Models.bind(new Person(), c);

        p.setFirstName("Jirka");

        p.setSex(Sex.MALE);

        Map m = (Map)Models.toRaw(p);

        Object v = m.get("sex");

        assertNotNull(v, "Value should be in the map");

        assertEquals(v.getClass(), One.class, "It is instance of One");

        One o = (One)v;

        o.set("FEMALE");

        assertEquals(p.getSex(), Sex.FEMALE, "Changed to female");

    }

    @Test public void derivedProperty() throws Exception {

        Person p = Models.bind(new Person(), c);

        Map m = (Map)Models.toRaw(p);

        Object v = m.get("fullName");

        assertNotNull(v, "Value should be in the map");

        assertEquals(v.getClass(), One.class, "It is instance of One");

        One o = (One)v;

        assertTrue(o.pb.isReadOnly(), "Mutable property");

    }

    @Test public void changeSex() {

        Person p = Models.bind(new Person(), c);

        p.setFirstName("Trans");

        p.setSex(Sex.MALE);

        Map m = (Map)Models.toRaw(p);

        Object o = m.get("changeSex");

        assertNotNull(o, "Function registered in the model");

        assertEquals(o.getClass(), One.class);

        One one = (One)o;

        assertNotNull(one.fb, "Function binding specified");

        one.fb.call(null, null);

        assertEquals(p.getSex(), Sex.FEMALE, "Changed");

    }

    @Test public void setSex() {

        Person p = Models.bind(new Person(), c);

        p.setFirstName("Trans");

        Map m = (Map)Models.toRaw(p);

        Object o = m.get("changeSex");

        assertNotNull(o, "Function registered in the model");

        assertEquals(o.getClass(), One.class);

        One one = (One)o;

        assertNotNull(one.fb, "Function binding specified");

        one.fb.call("FEMALE", new Object());

        assertEquals(p.getSex(), Sex.FEMALE, "Changed");

    }

    static final class One {

        int changes;

        final PropertyBinding pb;

        final FunctionBinding fb;

        One(Object m, PropertyBinding pb) throws NoSuchMethodException {

            this.pb = pb;

            this.fb = null;

        }

        One(Object m, FunctionBinding fb) throws NoSuchMethodException {

            this.pb = null;

            this.fb = fb;

        }

        Object get() throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {

            return pb.getValue();

        }

        void set(Object v) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {

            pb.setValue(v);

        }

    }

    static final class MapTechnology 

    implements Technology<Map<String,One>>, Transfer {

        @Override

        public Map<String, One> wrapModel(Object model) {

            return new HashMap<String, One>();

        }

        @Override

        public void valueHasMutated(Map<String, One> data, String propertyName) {

            One p = data.get(propertyName);

            if (p != null) {

                p.changes++;

            }

        }

        @Override

        public void bind(PropertyBinding b, Object model, Map<String, One> data) {

            try {

                One o = new One(model, b);

                data.put(b.getPropertyName(), o);

            } catch (NoSuchMethodException ex) {

                throw new IllegalStateException(ex);

            }

        }

        @Override

        public void expose(FunctionBinding fb, Object model, Map<String, One> data) {

            try {

                data.put(fb.getFunctionName(), new One(model, fb));

            } catch (NoSuchMethodException ex) {

                throw new IllegalStateException(ex);

            }

        }

        @Override

        public void applyBindings(Map<String, One> data) {

        }

        @Override

        public Object wrapArray(Object[] arr) {

            return arr;

        }

        @Override

        public void extract(Object obj, String[] props, Object[] values) {

            Map<?,?> map = obj instanceof Map ? (Map<?,?>)obj : null;

            for (int i = 0; i < Math.min(props.length, values.length); i++) {

                if (map == null) {

                    values[i] = null;

                } else {

                    values[i] = map.get(props[i]);

                    if (values[i] instanceof One) {

                        values[i] = ((One)values[i]).pb.getValue();

                    }

                }

            }

        }

        @Override

        public void loadJSON(JSONCall call) {

            call.notifyError(new UnsupportedOperationException());

        }

        @Override

        public <M> M toModel(Class<M> modelClass, Object data) {

            return modelClass.cast(data);

        }

        @Override

        public Object toJSON(InputStream is) throws IOException {

            throw new IOException();

        }

        @Override

        public void runSafe(Runnable r) {

            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.

        }

    }

}