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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see .
 */
package net.sf.jasperreports.chrome;

import java.lang.reflect.Method;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.github.kklisura.cdt.protocol.commands.Target;
import com.github.kklisura.cdt.services.ChromeDevToolsService;
import com.github.kklisura.cdt.services.ChromeService;
import com.github.kklisura.cdt.services.WebSocketService;
import com.github.kklisura.cdt.services.config.ChromeDevToolsServiceConfiguration;
import com.github.kklisura.cdt.services.exceptions.WebSocketServiceException;
import com.github.kklisura.cdt.services.impl.ChromeDevToolsServiceImpl;
import com.github.kklisura.cdt.services.impl.ChromeServiceImpl;
import com.github.kklisura.cdt.services.impl.WebSocketServiceImpl;
import com.github.kklisura.cdt.services.invocation.CommandInvocationHandler;
import com.github.kklisura.cdt.services.types.ChromeTab;
import com.github.kklisura.cdt.services.utils.ProxyUtils;

import net.sf.jasperreports.engine.JRRuntimeException;

/**
 * @author Lucian Chirita ([email protected])
 */
public class IsolatedPageCreator implements PageCreator
{

	private static final Log log = LogFactory.getLog(IsolatedPageCreator.class);
	
	private static final IsolatedPageCreator INSTANCE = new IsolatedPageCreator();
	
	public static IsolatedPageCreator instance()
	{
		return INSTANCE;
	}

	@Override
	public  T runInPage(ChromeInstanceHandle chromeInstance, Function tabAction)
	{
		return chromeInstance.runWithChromeInstance(chromeService ->
		{
			try(ChromeDevToolsServiceImpl browserDevToolsService = getBrowserDevToolsService(chromeService))
			{
				Target target = browserDevToolsService.getTarget();
				String browserContextId = target.createBrowserContext();
				try
				{
					if (log.isDebugEnabled())
					{
						log.debug("created browser context " + browserContextId);
					}

					String targetId = target.createTarget(ChromeServiceImpl.ABOUT_BLANK_PAGE, 
							null, null, 
							browserContextId, 
							null, null, null);
					try
					{
						if (log.isDebugEnabled())
						{
							log.debug("created tab " + targetId);
						}

						ChromeTab tab = getTab(chromeService, targetId);
						try(ChromeDevToolsService devToolsService = chromeService.createDevToolsService(tab))
						{
							return tabAction.apply(devToolsService);
						}
					}
					finally
					{
						target.closeTarget(targetId);
						if (log.isDebugEnabled())
						{
							log.debug("closed tab " + targetId);
						}						
					}
				}
				finally
				{
					target.disposeBrowserContext(browserContextId);
					if (log.isDebugEnabled())
					{
						log.debug("disposed browser context " + browserContextId);
					}					
				}
			}
		});
	}

	protected ChromeTab getTab(ChromeService chromeService, String tabId)
	{
		ChromeTab tab = null;
		for (ChromeTab chromeTab : chromeService.getTabs())
		{
			if (tabId.equals(chromeTab.getId()))
			{
				tab = chromeTab;
				break;
			}
		}
		if (tab == null)
		{
			throw new JRRuntimeException("Did not find Chrome tab " + tabId);
		}
		return tab;
	}

	protected ChromeDevToolsServiceImpl getBrowserDevToolsService(ChromeService chromeService)
	{
		try
		{
			ChromeDevToolsServiceConfiguration devToolsServiceConfiguration = 
					new ChromeDevToolsServiceConfiguration();

			//TODO lucian cache url or service?
			String browserWSUrl = chromeService.getVersion().getWebSocketDebuggerUrl();
			WebSocketService wsService = WebSocketServiceImpl.create(new URI(browserWSUrl));

			CommandInvocationHandler invocationHandler = new CommandInvocationHandler();
			Map cache = new ConcurrentHashMap<>();
			ChromeDevToolsServiceImpl devToolsService = ProxyUtils.createProxyFromAbstract(
					ChromeDevToolsServiceImpl.class,
					new Class[] {WebSocketService.class, ChromeDevToolsServiceConfiguration.class},
					new Object[] {wsService, devToolsServiceConfiguration},
					(proxy, method, args) -> cache.computeIfAbsent(method, 
							key -> ProxyUtils.createProxy(method.getReturnType(), invocationHandler)
			));
			invocationHandler.setChromeDevToolsService(devToolsService);
			return devToolsService;
		}
		catch (WebSocketServiceException | URISyntaxException e)
		{
			throw new JRRuntimeException(e);
		}
	}

}