package org.argeo.slc.core.execution;

import java.util.ArrayList;
import java.util.List;

import org.argeo.slc.execution.ExecutionModulesManager;
import org.argeo.slc.process.SlcExecution;
import org.argeo.slc.process.SlcExecutionNotifier;

public abstract class AbstractExecutionModulesManager implements
		ExecutionModulesManager {
	private List<SlcExecutionNotifier> slcExecutionNotifiers = new ArrayList<SlcExecutionNotifier>();
	private ThreadGroup processesThreadGroup = new ThreadGroup("Processes");

	public void process(SlcExecution slcExecution) {
		new ProcessThread(this, slcExecution).start();
	}
/*
	protected void dispatchUpdateStatus(SlcExecution slcExecution,
			String oldStatus, String newStatus) {
		for (Iterator<SlcExecutionNotifier> it = slcExecutionNotifiers
				.iterator(); it.hasNext();) {
			it.next().updateStatus(slcExecution, oldStatus, newStatus);
		}
	}

	protected synchronized void dispatchAddStep(SlcExecution slcExecution,
			SlcExecutionStep step) {
		slcExecution.getSteps().add(step);
		List<SlcExecutionStep> steps = new ArrayList<SlcExecutionStep>();
		steps.add(step);
		for (Iterator<SlcExecutionNotifier> it = slcExecutionNotifiers
				.iterator(); it.hasNext();) {
			it.next().addSteps(slcExecution, steps);
		}
	}*/

	public void setSlcExecutionNotifiers(
			List<SlcExecutionNotifier> slcExecutionNotifiers) {
		this.slcExecutionNotifiers = slcExecutionNotifiers;
	}
/*
	protected static void addFlowsToDescriptor(ExecutionModuleDescriptor md,
			Map<String, ExecutionFlow> executionFlows) {
		// TODO: put this in a separate configurable object
		for (String name : executionFlows.keySet()) {
			ExecutionFlow executionFlow = executionFlows.get(name);

			Assert.notNull(executionFlow.getName());
			Assert.state(name.equals(executionFlow.getName()));

			ExecutionSpec executionSpec = executionFlow.getExecutionSpec();
			Assert.notNull(executionSpec);
			Assert.notNull(executionSpec.getName());

			Map<String, Object> values = new TreeMap<String, Object>();
			for (String key : executionSpec.getAttributes().keySet()) {
				ExecutionSpecAttribute attribute = executionSpec
						.getAttributes().get(key);

				if (executionFlow.isSetAsParameter(key)) {
					Object value = executionFlow.getParameter(key);
					if (attribute instanceof PrimitiveSpecAttribute) {
						PrimitiveValue primitiveValue = new PrimitiveValue();
						primitiveValue
								.setType(((PrimitiveSpecAttribute) attribute)
										.getType());
						primitiveValue.setValue(value);
						values.put(key, primitiveValue);
					} else if (attribute instanceof RefSpecAttribute) {
						RefValue refValue = new RefValue();
						if (value instanceof ScopedObject) {
							refValue.setLabel("RUNTIME "
									+ value.getClass().getName());
						} else {
							refValue.setLabel("STATIC "
									+ value.getClass().getName());
						}
						values.put(key, refValue);
					} else {
						throw new SlcException("Unkown spec attribute type "
								+ attribute.getClass());
					}
				}

			}

			ExecutionFlowDescriptor efd = new ExecutionFlowDescriptor(name,
					values, executionSpec);
			if (executionFlow.getPath() != null)
				efd.setPath(executionFlow.getPath());

			// Add execution spec if necessary
			if (!md.getExecutionSpecs().contains(executionSpec))
				md.getExecutionSpecs().add(executionSpec);

			// Add execution flow
			md.getExecutionFlows().add(efd);
		}
	}
*/
	/**
	 * Thread of the SLC Process, starting the sub executions. private class
	 * ProcessThread extends Thread { private final SlcExecution slcProcess;
	 * private final ThreadGroup processThreadGroup; private final
	 * List<RealizedFlow> flowsToProcess = new ArrayList<RealizedFlow>();
	 * 
	 * public ProcessThread(ThreadGroup processesThreadGroup, SlcExecution
	 * slcExecution) { super(processesThreadGroup, "SLC Process #" +
	 * slcExecution.getUuid()); this.slcProcess = slcExecution;
	 * processThreadGroup = new ThreadGroup("SLC Process #" +
	 * slcExecution.getUuid() + " thread group"); }
	 * 
	 * public void run() { log.info("\n##\n## Process SLC Execution " +
	 * slcProcess + "\n##\n");
	 * 
	 * slcProcess.setStatus(SlcExecution.STATUS_RUNNING);
	 * dispatchUpdateStatus(slcProcess, SlcExecution.STATUS_SCHEDULED,
	 * SlcExecution.STATUS_RUNNING);
	 * 
	 * flowsToProcess.addAll(slcProcess.getRealizedFlows());
	 * 
	 * while (flowsToProcess.size() > 0) { RealizedFlow flow =
	 * flowsToProcess.remove(0); ExecutionThread thread = new
	 * ExecutionThread(this, flow); thread.start();
	 * 
	 * synchronized (this) { try { wait(); } catch (InterruptedException e) { //
	 * silent } } }
	 * 
	 * slcProcess.setStatus(SlcExecution.STATUS_FINISHED);
	 * dispatchUpdateStatus(slcProcess, SlcExecution.STATUS_RUNNING,
	 * SlcExecution.STATUS_FINISHED); }
	 * 
	 * public synchronized void flowCompleted() { notifyAll(); }
	 * 
	 * public SlcExecution getSlcProcess() { return slcProcess; }
	 * 
	 * public ThreadGroup getProcessThreadGroup() { return processThreadGroup; }
	 * }
	 */

	/**
	 * Thread of a single execution private class ExecutionThread extends Thread
	 * { private final RealizedFlow realizedFlow; private final ProcessThread
	 * processThread;
	 * 
	 * public ExecutionThread(ProcessThread processThread, RealizedFlow
	 * realizedFlow) { super(processThread.getProcessThreadGroup(), "Flow " +
	 * realizedFlow.getFlowDescriptor().getName()); this.realizedFlow =
	 * realizedFlow; this.processThread = processThread; }
	 * 
	 * public void run() { ExecutionFlowDescriptor executionFlowDescriptor =
	 * realizedFlow .getFlowDescriptor(); String flowName =
	 * executionFlowDescriptor.getName();
	 * 
	 * dispatchAddStep(processThread.getSlcProcess(), new
	 * SlcExecutionStep(SlcExecutionStep.TYPE_PHASE_START, "Flow " + flowName));
	 * 
	 * try { execute(realizedFlow); } catch (Exception e) { // TODO: re-throw
	 * exception ? String msg = "Execution of flow " + flowName + " failed.";
	 * log.error(msg, e); dispatchAddStep(processThread.getSlcProcess(), new
	 * SlcExecutionStep(msg + " " + e.getMessage())); } finally {
	 * processThread.flowCompleted();
	 * dispatchAddStep(processThread.getSlcProcess(), new
	 * SlcExecutionStep(SlcExecutionStep.TYPE_PHASE_END, "Flow " + flowName)); }
	 * } }
	 */

	public List<SlcExecutionNotifier> getSlcExecutionNotifiers() {
		return slcExecutionNotifiers;
	}

	public ThreadGroup getProcessesThreadGroup() {
		return processesThreadGroup;
	}

}