/****************************************************************************
 * Copyright (c) 2022-2025 Imixs Software Solutions GmbH and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * https://www.eclipse.org/legal/epl-2.0
 *
 * This Source Code may also be made available under the terms of the
 * GNU General Public License, version 2 or later (GPL-2.0-or-later),
 * which is available at https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 ****************************************************************************/

package ai.dynamixs;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

import org.imixs.ai.rag.RAGService;
import org.imixs.workflow.ItemCollection;
import org.imixs.workflow.WorkflowKernel;
import org.imixs.workflow.engine.WorkflowService;
import org.imixs.workflow.exceptions.AdapterException;
import org.imixs.workflow.exceptions.PluginException;
import org.imixs.workflow.exceptions.QueryException;

import jakarta.inject.Inject;

/**
 * The OrderPlugin is a generic plugin for Order workflows.
 * <p>
 * The plugin collects a list of $uniqueids for the last 5 orders for the given
 * customer.ref. The list is stored in the item `order.history.ref`
 *
 * <p>
 * The plugin extends the default imixs-ai RAGIndexPlugin. In the mode INDEX
 * this plugins generates a default prompt template.This is to simplify the
 * models.
 * <p>
 * 
 * <pre>
  {@code
   <dynamixs-ai name="INDEX">
      <debug>false</debug>  
   </dynamixs-ai>
    }
 * </pre>
 * <p>
 * The tag 'debug' is optional
 * 
 * 
 * @author rsoika
 * 
 */
public class OrderPlugin extends org.imixs.ai.rag.RAGIndexPlugin {

	private static final Logger logger = Logger.getLogger(OrderPlugin.class.getName());
	public static final String LINK_PROPERTY = "$workitemref";
	public static final int MAX_HISTORY_RESULT = 5;
	@Inject
	private WorkflowService workflowService;

	@Inject
	private RAGService ragService;

	@Override
	public ItemCollection run(ItemCollection workitem, ItemCollection event) throws PluginException {

		// do not run on Snapshots!
		if (workitem.getType().startsWith("snapshot-")) {
			// no op!
			return workitem;
		}

		logger.info("├── running Dynamixs.AI Order Plugin");

		// Update History....
		updateOrderHistory(workitem);

		// read optional configuration form the model or imixs.properties....
		List<ItemCollection> ragIndexDefinitions = workflowService.evalWorkflowResultXML(event, "dynamixs-ai",
				RAGService.RAG_INDEX, workitem, false);

		try {
			// INDEX Mode?
			if (ragIndexDefinitions != null && ragIndexDefinitions.size() > 0) {

				// do we have a prompt template?
				ItemCollection indexDefinition = ragIndexDefinitions.get(0);
				String promptTemplate = indexDefinition.getItemValueString("promptTemplate");
				if (promptTemplate.isBlank()) {
					// generate default template
					ChronicleTextBuilder chronicleTextBuilder = new ChronicleTextBuilder(workitem);
					promptTemplate = chronicleTextBuilder.build();
					workitem.setItemValue("ai.chronicle.summary", promptTemplate);
					indexDefinition.setItemValue("promptTemplate", embedTemplate(promptTemplate));
					ragService.createIndex(ragIndexDefinitions, workitem, event);
				}
			}
		} catch (AdapterException e) {
			throw new PluginException(e);
		}

		return workitem;
	}

	/**
	 * This method updates the item `order.history.ref` with the latest 5 orders for
	 * the current customer
	 * 
	 * @param workitem
	 */
	private void updateOrderHistory(ItemCollection workitem) {

		workitem.removeItem("order.history.ref");
		String customerRef = workitem.getItemValueString("customer.ref");
		if (!customerRef.isEmpty()) {
			// append customer ref to $workitemref
			workitem.appendItemValueUnique("$workitemref", customerRef);

			// collect all history orders....

			String sQuery = "(";
			sQuery = " (type:\"workitem\" OR type:\"workitemarchive\") AND (" + LINK_PROPERTY + ":\"" + customerRef
					+ "\") AND ($workflowgroup:\"" + workitem.getWorkflowGroup() + "\")";

			List<ItemCollection> orderHistory = null;
			try {
				orderHistory = workflowService.getDocumentService().findStubs(sQuery, MAX_HISTORY_RESULT, 0,
						WorkflowKernel.LASTEVENTDATE, true);
			} catch (QueryException e) {
				e.printStackTrace();
			}
			if (orderHistory != null) {
				List<String> orderHistoryRefList = new ArrayList<>();
				for (ItemCollection order : orderHistory) {
					if (!workitem.getUniqueID().equals(order.getUniqueID())) { // skip current id!
						orderHistoryRefList.add(order.getUniqueID());
					}
				}
				workitem.setItemValue("order.history.ref", orderHistoryRefList);
			}

		}

	}

	/**
	 * Embedds a prompt into a imixs prompt template
	 * 
	 * 
	 * @param prompt
	 * @return
	 */
	private String embedTemplate(String prompt) {

		String template = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + //
				"<PromptDefinition>\n" + //
				"  <prompt_options>{}</prompt_options>\n" + //
				"  <prompt><![CDATA[";
		template = template + prompt;

		template = template + "]]>\n" + //
				"</prompt>\n" + //
				"</PromptDefinition> ";

		return template;
	}

}