package com.vetti.socket;

import com.vetti.common.ai.elevenLabs.ElevenLabsClient;
import com.vetti.common.ai.gpt.ChatGPTClient;
import com.vetti.common.ai.whisper.WhisperClient;
import com.vetti.common.config.RuoYiConfig;
import com.vetti.common.utils.spring.SpringUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

/**
 * 语音面试 web处理器
 */
@Slf4j
@ServerEndpoint("/voice-websocket/{clientId}")
@Component
public class ChatWebSocketHandler {

    // 语音文件保存目录
    private static final String VOICE_STORAGE_DIR = "/voice_files/";

    // 语音结果文件保存目录
    private static final String VOICE_STORAGE_RESULT_DIR = "/voice_result_files/";


    public ChatWebSocketHandler() {
        // 初始化存储目录
        File dir = new File(RuoYiConfig.getProfile() + VOICE_STORAGE_DIR);
        if (!dir.exists()) {
            dir.mkdirs();
        }

        File resultDir = new File(RuoYiConfig.getProfile() + VOICE_STORAGE_RESULT_DIR);
        if (!resultDir.exists()) {
            resultDir.mkdirs();
        }
    }

    // 连接建立时调用
    @OnOpen
    public void onOpen(Session session, @PathParam("clientId") String clientId) {
        log.info("WebSocket 链接已建立:{}", clientId);
        //创建会话

    }

    // 接收文本消息
    @OnMessage
    public void onTextMessage(Session session, String message) {
        System.out.println("接收到文本消息: " + message);
        // 可以在这里处理文本流数据
        try {
            // 发送响应
            session.getBasicRemote().sendText("已收到文本: " + message);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    // 接收二进制消息（流数据）
    @OnMessage
    public void onBinaryMessage(Session session, @PathParam("clientId") String clientId, ByteBuffer byteBuffer) {
        try {
            log.info("客户端ID为:{}", clientId);
            // 处理二进制流数据
            byte[] bytes = new byte[byteBuffer.remaining()];
            //从缓冲区中读取数据并存储到指定的字节数组中
            byteBuffer.get(bytes);
            // 生成唯一文件名
            String fileName = clientId + "_" + System.currentTimeMillis() + ".webm";
            String pathUrl = RuoYiConfig.getProfile()+VOICE_STORAGE_DIR + fileName;
//            String pathUrl = "/Users/wangxiangshun/Desktop/0.8733346782733291.webm";
            log.info("文件路径为:{}", pathUrl);
            saveAsWebM(bytes, pathUrl);
            //拿到文件进行文字转换
            WhisperClient whisperClient = SpringUtils.getBean(WhisperClient.class);
            String resultText = whisperClient.handleVoiceToText(pathUrl);
            //把提问的文字发送给CPT
            ChatGPTClient chatGPTClient = SpringUtils.getBean(ChatGPTClient.class);
            String resultMsg = chatGPTClient.handleAiChat(resultText);
            //把结果文字转成语音文件
            //生成文件
            // 生成唯一文件名
            String resultFileName = clientId + "_" + System.currentTimeMillis() + ".webm";
            String resultPathUrl = RuoYiConfig.getProfile() + VOICE_STORAGE_RESULT_DIR + resultFileName;
            ElevenLabsClient elevenLabsClient = SpringUtils.getBean(ElevenLabsClient.class);
            elevenLabsClient.handleTextToVoice(resultMsg, resultPathUrl);
            //把语音文件转换成流,发送给前端
            System.out.println("接收到二进制数据，长度: " + bytes.length + " bytes");
            try {
                //文件转换成文件流
                ByteBuffer outByteBuffer = convertFileToByteBuffer(resultPathUrl);
                session.getBasicRemote().sendBinary(outByteBuffer);
                // 发送响应确认
                session.getBasicRemote().sendText("已收到二进制数据，长度: " + bytes.length);
            } catch (IOException e) {
                e.printStackTrace();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 连接关闭时调用
    @OnClose
    public void onClose(Session session, CloseReason reason) {
        System.out.println("WebSocket连接已关闭: " + session.getId() + ", 原因: " + reason.getReasonPhrase());
    }

    // 发生错误时调用
    @OnError
    public void onError(Session session, Throwable throwable) {
        System.err.println("WebSocket错误发生: " + throwable.getMessage());
        throwable.printStackTrace();
    }

    /**
     * 将字节数组保存为WebM文件
     *
     * @param byteData 包含WebM数据的字节数组
     * @param filePath 目标文件路径
     * @return 操作是否成功
     */
    private boolean saveAsWebM(byte[] byteData, String filePath) {
        // 检查输入参数
        if (byteData == null || byteData.length == 0) {
            System.err.println("字节数组为空，无法生成WebM文件");
            return false;
        }

        if (filePath == null || filePath.trim().isEmpty()) {
            System.err.println("文件路径不能为空");
            return false;
        }

        // 确保文件以.webm结尾
        if (!filePath.toLowerCase().endsWith(".webm")) {
            filePath += ".webm";
        }

        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(filePath);
            fos.write(byteData);
            fos.flush();
            System.out.println("WebM文件已成功生成: " + filePath);
            return true;
        } catch (IOException e) {
            System.err.println("写入文件时发生错误: " + e.getMessage());
            e.printStackTrace();
        } finally {
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return false;
    }

    /**
     * File 转换成 ByteBuffer
     *
     * @param fileUrl 文件路径
     * @return
     */
    private ByteBuffer convertFileToByteBuffer(String fileUrl) {
        File file = new File(fileUrl);
        // 使用RandomAccessFile获取FileChannel
        try (RandomAccessFile raf = new RandomAccessFile(file, "r");
             FileChannel channel = raf.getChannel()) {
            // 分配与文件大小相同的ByteBuffer
            ByteBuffer buffer = ByteBuffer.allocate((int) channel.size());
            // 从通道读取数据到缓冲区
            channel.read(buffer);
            // 切换为读模式
            buffer.flip();
            return buffer;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

}