/*
 * Copyright 2025-2026 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.cloud.ai.examples.multiagents.workflow.sqlagent.node;

import com.alibaba.cloud.ai.examples.multiagents.workflow.sqlagent.tools.SqlTools;
import com.alibaba.cloud.ai.graph.OverAllState;
import com.alibaba.cloud.ai.graph.action.NodeAction;
import org.springframework.ai.chat.messages.AssistantMessage;
import org.springframework.ai.chat.messages.Message;
import org.springframework.ai.chat.model.ChatModel;
import org.springframework.ai.chat.prompt.Prompt;
import org.springframework.ai.model.tool.ToolCallingChatOptions;

import java.util.List;
import java.util.Map;

/**
 * Forces the model to call sql_db_schema (tool_choice=any). Equivalent to call_get_schema.
 */
public class CallGetSchemaNode implements NodeAction {

	private final ChatModel chatModel;

	private final SqlTools sqlTools;

	public CallGetSchemaNode(ChatModel chatModel, SqlTools sqlTools) {
		this.chatModel = chatModel;
		this.sqlTools = sqlTools;
	}

	@Override
	public Map<String, Object> apply(OverAllState state) throws Exception {
		@SuppressWarnings("unchecked")
		List<Message> messages = (List<Message>) state.value("messages").orElse(List.of());

		ToolCallingChatOptions options = ToolCallingChatOptions.builder()
				.toolCallbacks(List.of(sqlTools.getSchemaTool()))
				.internalToolExecutionEnabled(false)
				.build();

		AssistantMessage response = chatModel.call(new Prompt(messages, options)).getResult().getOutput();
		return Map.of("messages", List.of(response), "llm_response", response);
	}
}
