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package org.netbeans.html.kofx;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.lang.annotation.Annotation;

import java.lang.reflect.Method;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.URL;

import java.net.URLConnection;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import java.util.concurrent.Executors;

import net.java.html.BrwsrCtx;

import net.java.html.boot.BrowserBuilder;

import net.java.html.js.JavaScriptBody;

import org.netbeans.html.boot.impl.FnContext;

import org.apidesign.html.boot.spi.Fn;

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

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

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

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

import org.apidesign.html.json.tck.KOTest;

import org.apidesign.html.json.tck.KnockoutTCK;

import org.json.JSONException;

import org.json.JSONObject;

import org.openide.util.lookup.ServiceProvider;

import org.testng.annotations.Factory;

import static org.testng.Assert.*;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

@ServiceProvider(service = KnockoutTCK.class)

public final class KnockoutFXTest extends KnockoutTCK {

    private static Class<?> browserClass;

    private static Fn.Presenter browserContext;

    public KnockoutFXTest() {

    }

    @Factory public static Object[] compatibilityTests() throws Exception {

        Class[] arr = testClasses();

        for (int i = 0; i < arr.length; i++) {

            assertEquals(

                arr[i].getClassLoader(),

                KnockoutFXTest.class.getClassLoader(),

                "All classes loaded by the same classloader"

            );

        }

        URI uri = DynamicHTTP.initServer();

        final BrowserBuilder bb = BrowserBuilder.newBrowser().loadClass(KnockoutFXTest.class).

            loadPage(uri.toString()).

            invoke("initialized");

        Executors.newSingleThreadExecutor().submit(new Runnable() {

            @Override

            public void run() {

                bb.showAndWait();

            }

        });

        ClassLoader l = getClassLoader();

        List<Object> res = new ArrayList<Object>();

        for (int i = 0; i < arr.length; i++) {

            Class<?> c = Class.forName(arr[i].getName(), true, l);

            seekKOTests(c, res);

        }

        Class<?> c = Class.forName(LessCallbacksCheck.class.getName(), true, l);

        seekKOTests(c, res);

        return res.toArray();

    }

    private static void seekKOTests(Class<?> c, List<Object> res) throws SecurityException, ClassNotFoundException {

        Class<? extends Annotation> koTest =

            c.getClassLoader().loadClass(KOTest.class.getName()).

            asSubclass(Annotation.class);

        for (Method m : c.getMethods()) {

            if (m.getAnnotation(koTest) != null) {

                res.add(new KOFx(browserContext, m));

            }

        }

    }

    static synchronized ClassLoader getClassLoader() throws InterruptedException {

        while (browserClass == null) {

            KnockoutFXTest.class.wait();

        }

        return browserClass.getClassLoader();

    }

    public static synchronized void initialized(Class<?> browserCls) throws Exception {

        browserClass = browserCls;

        browserContext = FnContext.currentPresenter();

        KnockoutFXTest.class.notifyAll();

    }

    public static void initialized() throws Exception {

        Class<?> classpathClass = ClassLoader.getSystemClassLoader().loadClass(KnockoutFXTest.class.getName());

        Method m = classpathClass.getMethod("initialized", Class.class);

        m.invoke(null, KnockoutFXTest.class);

        browserContext = FnContext.currentPresenter();

    }

    @Override

    public BrwsrCtx createContext() {

        FXContext fx = new FXContext(browserContext);

        Contexts.Builder cb = Contexts.newBuilder().

            register(Technology.class, fx, 10).

            register(Transfer.class, fx, 10);

        if (fx.areWebSocketsSupported()) {

            cb.register(WSTransfer.class, fx, 10);

        }

        return cb.build();

    }

    @Override

    public Object createJSON(Map<String, Object> values) {

        JSONObject json = new JSONObject();

        for (Map.Entry<String, Object> entry : values.entrySet()) {

            try {

                json.put(entry.getKey(), entry.getValue());

            } catch (JSONException ex) {

                throw new IllegalStateException(ex);

            }

        }

        return json;

    }

    @Override

    @JavaScriptBody(args = { "s", "args" }, body = ""

        + "var f = new Function(s); "

        + "return f.apply(null, args);"

    )

    public native Object executeScript(String script, Object[] arguments);

    @JavaScriptBody(args = {  }, body = 

          "var h;"

        + "if (!!window && !!window.location && !!window.location.href)\n"

        + "  h = window.location.href;\n"

        + "else "

        + "  h = null;"

        + "return h;\n"

    )

    private static native String findBaseURL();

    @Override

    public URI prepareURL(String content, String mimeType, String[] parameters) {

        try {

            final URL baseURL = new URL(findBaseURL());

            StringBuilder sb = new StringBuilder();

            sb.append("/dynamic?mimeType=").append(mimeType);

            for (int i = 0; i < parameters.length; i++) {

                sb.append("&param" + i).append("=").append(parameters[i]);

            }

            String mangle = content.replace("\n", "%0a")

                .replace("\"", "\\\"").replace(" ", "%20");

            sb.append("&content=").append(mangle);

            URL query = new URL(baseURL, sb.toString());

            URLConnection c = query.openConnection();

            BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));

            URI connectTo = new URI(br.readLine());

            return connectTo;

        } catch (IOException ex) {

            throw new IllegalStateException(ex);

        } catch (URISyntaxException ex) {

            throw new IllegalStateException(ex);

        }

    }

    @Override

    public boolean canFailWebSocketTest() {

        try {

            Class.forName("java.util.function.Function");

            return false;

        } catch (ClassNotFoundException ex) {

            // running on JDK7, FX WebView WebSocket impl does not work

            return true;

        }

    }

}