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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *     http://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.hw.langchain.examples.chains;

import com.hw.langchain.chains.llm.LLMChain;
import com.hw.langchain.chat.models.openai.ChatOpenAI;
import com.hw.langchain.examples.runner.RunnableExample;
import com.hw.langchain.prompts.chat.ChatPromptTemplate;
import com.hw.langchain.prompts.chat.HumanMessagePromptTemplate;
import com.hw.langchain.prompts.chat.SystemMessagePromptTemplate;

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

import static com.hw.langchain.examples.utils.PrintUtils.println;

/**
 * @author HamaWhite
 */
@RunnableExample
public class ChatChainExample {

    public static void main(String[] args) {
        var chat = ChatOpenAI.builder()
                .temperature(0)
                .build()
                .init();

        var template = "You are a helpful assistant that translates {input_language} to {output_language}.";
        var systemMessagePrompt = SystemMessagePromptTemplate.fromTemplate(template);
        var humanMessagePrompt = HumanMessagePromptTemplate.fromTemplate("{text}");
        var chatPrompt = ChatPromptTemplate.fromMessages(List.of(systemMessagePrompt, humanMessagePrompt));

        var chain = new LLMChain(chat, chatPrompt);
        var result = chain
                .run(Map.of("input_language", "English", "output_language", "French", "text", "I love programming."));
        println(result);
    }
}