br-web-server 0.5.19

use crate::request::Request;
use crate::response::Response;
use crate::{Handler, HttpError};
use dashmap::DashMap;
use flate2::read::DeflateDecoder;
use flate2::write::DeflateEncoder;
use flate2::Compression;
use json::{object, JsonValue};
use std::collections::HashSet;
use std::io::{Read, Write};
use std::sync::mpsc::{channel, Sender};
use std::sync::Mutex;
use std::{io, thread};

const MAX_FRAME_SIZE: usize = 16 * 1024 * 1024;
const MAX_DECOMPRESSED_SIZE: usize = 16 * 1024 * 1024;
const MAX_CONTROL_FRAME_PAYLOAD: usize = 125;
const MIN_COMPRESS_SIZE: usize = 64;

pub static USERS: std::sync::LazyLock<DashMap<String, Websocket>> =
    std::sync::LazyLock::new(DashMap::new);
pub static WS_NOTICE: std::sync::LazyLock<Mutex<Vec<NoticeMsg>>> =
    std::sync::LazyLock::new(|| Mutex::new(Vec::new()));
pub static SUBSCRIPTIONS: std::sync::LazyLock<DashMap<String, HashSet<String>>> =
    std::sync::LazyLock::new(DashMap::new);

#[derive(Debug, Clone, Default)]
pub struct DeflateConfig {
    pub enabled: bool,
    pub server_no_context_takeover: bool,
    pub client_no_context_takeover: bool,
}

impl DeflateConfig {
    pub fn from_header(header_value: &str) -> Option<Self> {
        if !header_value.contains("permessage-deflate") {
            return None;
        }
        let mut config = Self {
            enabled: true,
            server_no_context_takeover: true,
            client_no_context_takeover: false,
        };
        for part in header_value.split(';').map(|s| s.trim()) {
            if part.starts_with("server-no-context-takeover")
                || part.starts_with("server_no_context_takeover")
            {
                config.server_no_context_takeover = true;
            } else if part.starts_with("client-no-context-takeover")
                || part.starts_with("client_no_context_takeover")
            {
                config.client_no_context_takeover = true;
            }
        }
        if !config.client_no_context_takeover {
            return None;
        }
        Some(config)
    }

    pub fn to_header_value(&self) -> String {
        let mut parts = vec!["permessage-deflate".to_string()];
        if self.server_no_context_takeover {
            parts.push("server-no-context-takeover".to_string());
        }
        if self.client_no_context_takeover {
            parts.push("client-no-context-takeover".to_string());
        }
        parts.join("; ")
    }

    pub fn decompress(&self, data: &[u8]) -> io::Result<Vec<u8>> {
        let mut input = data.to_vec();
        input.extend_from_slice(&[0x00, 0x00, 0xff, 0xff]);
        let decoder = DeflateDecoder::new(&input[..]);
        let mut limited = decoder.take(MAX_DECOMPRESSED_SIZE as u64 + 1);
        let mut decompressed = Vec::new();
        limited.read_to_end(&mut decompressed)?;
        if decompressed.len() > MAX_DECOMPRESSED_SIZE {
            return Err(io::Error::new(
                io::ErrorKind::InvalidData,
                "Decompressed payload exceeds maximum size",
            ));
        }
        Ok(decompressed)
    }

    pub fn compress(&self, data: &[u8]) -> io::Result<Vec<u8>> {
        let mut encoder = DeflateEncoder::new(Vec::new(), Compression::default());
        encoder.write_all(data)?;
        let mut compressed = encoder.finish()?;
        if compressed.len() >= 4 && compressed[compressed.len() - 4..] == [0x00, 0x00, 0xff, 0xff] {
            compressed.truncate(compressed.len() - 4);
        }
        Ok(compressed)
    }
}

#[derive(Debug, Clone)]
pub struct Websocket {
    pub send: Option<Sender<Message>>,
    pub key: String,
    version: String,
    request: Request,
    response: Response,
    pub deflate: DeflateConfig,
}

impl Websocket {
    #[must_use]
    pub fn http(request: Request, response: Response) -> Self {
        Self {
            send: None,
            request,
            key: String::new(),
            version: String::new(),
            response,
            deflate: DeflateConfig::default(),
        }
    }
    pub fn new(request: Request, response: Response) -> Self {
        Self {
            send: None,
            request,
            key: String::new(),
            version: String::new(),
            response,
            deflate: DeflateConfig::default(),
        }
    }
    pub fn send(&self, data: &JsonValue) {
        let msg = Message {
            mode: MessageMode::Server,
            message_type: MessageType::Text,
            payload: data.to_string().into_bytes(),
            text: data.to_string(),
            close: CloseCode::NormalClosure,
            error: ErrorCode::None,
        };
        if let Some(sender) = &self.send {
            if let Err(e) = sender.send(msg) {
                log::warn!("WebSocket send failed: {:?}", e);
            }
        } else {
            log::warn!("WebSocket send channel is None");
        }
    }

    pub fn send_binary(&self, data: &[u8]) {
        let msg = Message {
            mode: MessageMode::Server,
            message_type: MessageType::Binary,
            payload: data.to_vec(),
            text: String::new(),
            close: CloseCode::NormalClosure,
            error: ErrorCode::None,
        };
        if let Some(sender) = &self.send {
            if let Err(e) = sender.send(msg) {
                log::warn!("WebSocket send_binary failed: {:?}", e);
            }
        } else {
            log::warn!("WebSocket send channel is None");
        }
    }

    pub fn ping(&self, payload: &[u8]) {
        let msg = Message {
            mode: MessageMode::Server,
            message_type: MessageType::Ping,
            payload: payload.to_vec(),
            text: String::new(),
            close: CloseCode::NormalClosure,
            error: ErrorCode::None,
        };
        if let Some(sender) = &self.send {
            if let Err(e) = sender.send(msg) {
                log::warn!("WebSocket ping failed: {:?}", e);
            }
        }
    }

    pub fn close(&self, code: CloseCode, reason: &str) {
        let msg = Message {
            mode: MessageMode::Server,
            message_type: MessageType::Close,
            payload: reason.as_bytes().to_vec(),
            text: reason.to_string(),
            close: code,
            error: ErrorCode::None,
        };
        match &self.send {
            Some(sender) => {
                if let Err(e) = sender.send(msg) {
                    log::warn!("WebSocket close failed: {:?}", e);
                }
            }
            None => {
                log::warn!("WebSocket close called but send channel is None");
            }
        }
    }

    pub fn online_users(&self) -> usize {
        USERS.len()
    }

    pub fn is_connected(&self) -> bool {
        self.send.is_some()
    }
    pub fn handle(&mut self) -> Result<(), HttpError> {
        let (send, receive) = channel();
        self.send = Some(send);
        self.on_frame()?;
        let mut factory = (self.response.factory)(self.clone());
        USERS.insert(self.key.to_string(), self.clone());
        factory.on_open()?;

        let deflate = self.deflate.clone();
        let key = self.key.clone();
        let that = self.clone();

        let split_result =
            crate::stream::Scheme::split_for_websocket(&self.response.request.scheme);

        match split_result {
            Ok((mut reader, mut writer)) => {
                let send_clone = self.send.clone();
                let thr = thread::spawn(move || -> Result<(), HttpError> {
                    loop {
                        let msg = match reader.read_ws_data(&deflate) {
                            Ok(e) => e,
                            Err(_) => return Ok(()),
                        };
                        match msg.message_type {
                            MessageType::TimeOut => continue,
                            _ => match send_clone.clone() {
                                Some(sender) => match sender.send(msg) {
                                    Ok(()) => continue,
                                    Err(_) => return Ok(()),
                                },
                                None => return Ok(()),
                            },
                        }
                    }
                });

                let key_clone = key.clone();
                thread::spawn(move || -> io::Result<()> {
                    let mut factory = (that.response.factory)(that.clone());
                    loop {
                        match receive.recv() {
                            Ok(msg) => match msg.message_type {
                                MessageType::TimeOut => continue,
                                MessageType::Close => {
                                    factory.on_close(msg.close.clone(), &msg.text);
                                    USERS.remove(&key_clone);
                                    return Ok(());
                                }
                                MessageType::Pong => {}
                                MessageType::Ping => {
                                    let pong_frame = Message::send_pong(&msg.payload);
                                    if let Err(e) = writer.write_all(&pong_frame) {
                                        log::warn!("发送 Pong 失败: {:?}", e);
                                    }
                                }
                                MessageType::Binary | MessageType::Text => match msg.mode {
                                    MessageMode::Server => {
                                        let frame = msg.clone().send_message(&that.deflate);
                                        if let Err(e) = writer.write_all(&frame) {
                                            log::warn!("发送消息失败: {:?}", e);
                                        }
                                    }
                                    MessageMode::Client => {
                                        if msg.message_type == MessageType::Text {
                                            if let Ok(parsed) = json::parse(&msg.text) {
                                                if parsed["type"] == "ping" {
                                                    that.send(&object! {
                                                        "type": "pong",
                                                        "timestamp": parsed["timestamp"].clone()
                                                    });
                                                    continue;
                                                }
                                            }
                                        }
                                        if let Ok(()) = factory.on_message(msg) {};
                                    }
                                },
                                MessageType::Error => continue,
                                _ => continue,
                            },
                            Err(_) => {
                                factory.on_close(CloseCode::AbnormalClosure, "连接异常断开");
                                USERS.remove(&key_clone);
                                return Ok(());
                            }
                        }
                    }
                });

                if let Err(e) = thr.join() {
                    log::warn!("WebSocket 线程异常退出: {:?}", e);
                }
            }
            Err(_) => {
                let scheme = self.response.request.scheme.clone();
                let send_clone = self.send.clone();
                let deflate_clone = deflate.clone();

                let thr = thread::spawn(move || -> Result<(), HttpError> {
                    loop {
                        let mut guard = match scheme.lock() {
                            Ok(g) => g,
                            Err(_) => return Ok(()),
                        };
                        let msg = match guard.read_ws_data(&deflate_clone) {
                            Ok(e) => e,
                            Err(_) => return Ok(()),
                        };
                        drop(guard);
                        match msg.message_type {
                            MessageType::TimeOut => continue,
                            _ => match send_clone.clone() {
                                Some(sender) => match sender.send(msg) {
                                    Ok(()) => continue,
                                    Err(_) => return Ok(()),
                                },
                                None => return Ok(()),
                            },
                        }
                    }
                });

                let scheme = self.response.request.scheme.clone();
                let key_clone = key.clone();
                thread::spawn(move || -> io::Result<()> {
                    let mut factory = (that.response.factory)(that.clone());
                    loop {
                        match receive.recv() {
                            Ok(msg) => match msg.message_type {
                                MessageType::TimeOut => continue,
                                MessageType::Close => {
                                    factory.on_close(msg.close.clone(), &msg.text);
                                    USERS.remove(&key_clone);
                                    return Ok(());
                                }
                                MessageType::Pong => {}
                                MessageType::Ping => {
                                    let pong_frame = Message::send_pong(&msg.payload);
                                    match scheme.lock() {
                                        Ok(mut s) => {
                                            if let Err(e) = s.write_all(&pong_frame) {
                                                log::warn!("发送 Pong 失败: {:?}", e);
                                            }
                                        }
                                        Err(e) => log::warn!("lock failed: {:?}", e),
                                    }
                                }
                                MessageType::Binary | MessageType::Text => match msg.mode {
                                    MessageMode::Server => {
                                        let frame = msg.clone().send_message(&that.deflate);
                                        match scheme.lock() {
                                            Ok(mut s) => {
                                                if let Err(e) = s.write_all(&frame) {
                                                    log::warn!("发送消息失败: {:?}", e);
                                                }
                                            }
                                            Err(e) => log::warn!("lock failed: {:?}", e),
                                        }
                                    }
                                    MessageMode::Client => {
                                        if msg.message_type == MessageType::Text {
                                            if let Ok(parsed) = json::parse(&msg.text) {
                                                if parsed["type"] == "ping" {
                                                    that.send(&object! {
                                                        "type": "pong",
                                                        "timestamp": parsed["timestamp"].clone()
                                                    });
                                                    continue;
                                                }
                                            }
                                        }
                                        if let Ok(()) = factory.on_message(msg) {};
                                    }
                                },
                                MessageType::Error => continue,
                                _ => continue,
                            },
                            Err(_) => {
                                factory.on_close(CloseCode::AbnormalClosure, "连接异常断开");
                                USERS.remove(&key_clone);
                                return Ok(());
                            }
                        }
                    }
                });

                if let Err(e) = thr.join() {
                    log::warn!("WebSocket 线程异常退出: {:?}", e);
                }
            }
        }

        Ok(())
    }
}
impl Handler for Websocket {
    fn on_request(&mut self, _request: Request, _response: &mut Response) {}
    fn on_frame(&mut self) -> Result<(), HttpError> {
        self.key = self.request.header["sec-websocket-key"]
            .as_str()
            .unwrap_or("")
            .to_string();
        self.version = self.request.header["sec-websocket-version"]
            .as_str()
            .unwrap_or("")
            .to_string();

        if self.key.is_empty() {
            log::warn!("WebSocket 握手失败: 缺少 Sec-WebSocket-Key");
            self.response.status(400).send()?;
            return Err(HttpError::new(400, "Missing Sec-WebSocket-Key"));
        }

        if self.version != "13" {
            log::warn!("WebSocket 版本不支持: {}", self.version);
            self.response
                .header("Sec-WebSocket-Version", "13")
                .status(426)
                .send()?;
            return Err(HttpError::new(426, "Unsupported WebSocket version"));
        }

        let extensions = self.request.header["sec-websocket-extensions"]
            .as_str()
            .unwrap_or("");
        if let Some(deflate_config) = DeflateConfig::from_header(extensions) {
            self.deflate = deflate_config;
        }

        self.response.header("Upgrade", "websocket");
        self.response.header("Connection", "Upgrade");
        let sec_websocket_accept = br_crypto::sha1::encrypt_base64(
            format!("{}258EAFA5-E914-47DA-95CA-C5AB0DC85B11", self.key).as_bytes(),
        );
        self.response
            .header("Sec-WebSocket-Accept", sec_websocket_accept.as_str());

        if self.deflate.enabled {
            self.response
                .header("Sec-WebSocket-Extensions", &self.deflate.to_header_value());
        }

        self.response.status(101).send()?;
        self.response
            .request
            .scheme
            .lock()
            .map_err(|e| HttpError::new(500, &format!("lock: {}", e)))?
            .flush()?;
        Ok(())
    }
}
#[derive(Debug, Clone)]
pub struct Message {
    pub mode: MessageMode,
    pub message_type: MessageType,
    pub payload: Vec<u8>, // 消息载荷，以字节向量形式表示
    pub text: String,
    pub close: CloseCode,
    pub error: ErrorCode,
}

impl Message {
    #[must_use]
    pub fn msg_error() -> Self {
        Message {
            mode: MessageMode::Client,
            message_type: MessageType::Error,
            payload: vec![],
            text: "长度不够".to_string(),
            close: CloseCode::NormalClosure,
            error: ErrorCode::SendingDataFailed,
        }
    }
    // 解析WebSocket消息
    pub fn parse_message(data: &mut Vec<u8>, deflate: &DeflateConfig) -> Message {
        log::trace!("WebSocket parse_message: data.len()={}", data.len());

        if data.len() < 2 {
            return Message {
                mode: MessageMode::Client,
                message_type: MessageType::TimeOut,
                payload: vec![],
                text: String::new(),
                close: CloseCode::NormalClosure,
                error: ErrorCode::None,
            };
        }

        let byte0 = data[0];
        let byte1 = data[1];
        let rsv2 = (byte0 & 0b0010_0000) != 0;
        let rsv3 = (byte0 & 0b0001_0000) != 0;

        if rsv2 || rsv3 {
            log::warn!("WebSocket RSV2/RSV3 位非零, byte0={:#04x}", byte0);
            data.clear();
            return Message {
                mode: MessageMode::Client,
                message_type: MessageType::Error,
                payload: vec![],
                text: "RSV2/RSV3位必须为0".to_string(),
                close: CloseCode::ProtocolError,
                error: ErrorCode::SendingDataFailed,
            };
        }

        let rsv1 = (byte0 & 0b0100_0000) != 0;
        if rsv1 && !deflate.enabled {
            log::warn!("WebSocket RSV1 位非零但未启用压缩");
            data.clear();
            return Message {
                mode: MessageMode::Client,
                message_type: MessageType::Error,
                payload: vec![],
                text: "RSV1位必须为0".to_string(),
                close: CloseCode::ProtocolError,
                error: ErrorCode::SendingDataFailed,
            };
        }

        let len_flag = byte1 & 0b0111_1111;
        let masked = (byte1 & 0b1000_0000) != 0;

        let (ext_len_size, payload_length) = match len_flag {
            0..=125 => (0usize, len_flag as usize),
            126 => {
                if data.len() < 4 {
                    return Message {
                        mode: MessageMode::Client,
                        message_type: MessageType::TimeOut,
                        payload: vec![],
                        text: String::new(),
                        close: CloseCode::NormalClosure,
                        error: ErrorCode::None,
                    };
                }
                (2usize, u16::from_be_bytes([data[2], data[3]]) as usize)
            }
            127 => {
                if data.len() < 10 {
                    return Message {
                        mode: MessageMode::Client,
                        message_type: MessageType::TimeOut,
                        payload: vec![],
                        text: String::new(),
                        close: CloseCode::NormalClosure,
                        error: ErrorCode::None,
                    };
                }
                (
                    8usize,
                    u64::from_be_bytes([
                        data[2], data[3], data[4], data[5], data[6], data[7], data[8], data[9],
                    ]) as usize,
                )
            }
            _ => {
                data.clear();
                return Message::msg_error();
            }
        };

        if payload_length > MAX_FRAME_SIZE {
            log::warn!("帧大小超过限制: {} > {}", payload_length, MAX_FRAME_SIZE);
            data.clear();
            return Message {
                mode: MessageMode::Client,
                message_type: MessageType::Error,
                payload: vec![],
                text: "消息过大".to_string(),
                close: CloseCode::MessageTooBig,
                error: ErrorCode::SendingDataFailed,
            };
        }

        let mask_len = if masked { 4 } else { 0 };
        let total_len = 2 + ext_len_size + mask_len + payload_length;

        if data.len() < total_len {
            log::trace!(
                "WebSocket 数据不足: 需要 {} 字节, 当前 {} 字节",
                total_len,
                data.len()
            );
            return Message {
                mode: MessageMode::Client,
                message_type: MessageType::TimeOut,
                payload: vec![],
                text: String::new(),
                close: CloseCode::NormalClosure,
                error: ErrorCode::None,
            };
        }

        let header = data.drain(..2).collect::<Vec<u8>>();

        let rsv1 = (header[0] & 0b0100_0000) != 0;

        let fin = (header[0] & 0b1000_0000) != 0;
        let opcode = header[0] & 0b0000_1111;
        let masked = (header[1] & 0b1000_0000) != 0;
        let len_flag = header[1] & 0b0111_1111;
        let mut payload_data = Vec::new();
        let message_type = MessageType::from(opcode);
        log::trace!(
            "fin: {:#?} message_type: {:?} opcode: {} masked: {} len_flag: {} rsv1: {}",
            fin,
            message_type,
            opcode,
            masked,
            len_flag,
            rsv1
        );
        match message_type {
            MessageType::Text => {
                let payload_length = match len_flag {
                    0..=125 => len_flag as usize,
                    126 => {
                        if data.len() < 2 {
                            return Message {
                                mode: MessageMode::Client,
                                message_type: MessageType::Error,
                                payload: vec![],
                                text: "数据不足".to_string(),
                                close: CloseCode::NormalClosure,
                                error: ErrorCode::SendingDataFailed,
                            };
                        }
                        let ext = data.drain(..2).collect::<Vec<u8>>();
                        u16::from_be_bytes([ext[0], ext[1]]) as usize
                    }
                    127 => {
                        if data.len() < 8 {
                            return Message {
                                mode: MessageMode::Client,
                                message_type: MessageType::Error,
                                payload: vec![],
                                text: "数据不足".to_string(),
                                close: CloseCode::NormalClosure,
                                error: ErrorCode::SendingDataFailed,
                            };
                        }
                        let ext = data.drain(..8).collect::<Vec<u8>>();
                        u64::from_be_bytes([
                            ext[0], ext[1], ext[2], ext[3], ext[4], ext[5], ext[6], ext[7],
                        ]) as usize
                    }
                    _ => {
                        return Message {
                            mode: MessageMode::Client,
                            message_type: MessageType::Error,
                            payload: vec![],
                            text: "数据格式错误".to_string(),
                            close: CloseCode::NormalClosure,
                            error: ErrorCode::SendingDataFailed,
                        }
                    }
                };

                if payload_length > MAX_FRAME_SIZE {
                    log::warn!("帧大小超过限制: {} > {}", payload_length, MAX_FRAME_SIZE);
                    return Message {
                        mode: MessageMode::Client,
                        message_type: MessageType::Error,
                        payload: vec![],
                        text: "消息过大".to_string(),
                        close: CloseCode::MessageTooBig,
                        error: ErrorCode::SendingDataFailed,
                    };
                }

                if masked {
                    // Need 4 bytes for mask key + payload_length bytes for payload
                    if data.len() < payload_length + 4 {
                        return Message {
                            mode: MessageMode::Client,
                            message_type,
                            payload: payload_data,
                            text: "继续加载".to_string(),
                            close: CloseCode::NormalClosure,
                            error: ErrorCode::None,
                        };
                    }
                    let mask_key = data.drain(..4).collect::<Vec<u8>>();
                    let payload = &data[..payload_length];
                    for i in 0..payload.len() {
                        payload_data.push(payload[i] ^ mask_key[i % 4]);
                    }
                    data.drain(..payload_length);
                } else {
                    if data.len() < payload_length {
                        return Message {
                            mode: MessageMode::Client,
                            message_type,
                            payload: payload_data,
                            text: "继续加载".to_string(),
                            close: CloseCode::NormalClosure,
                            error: ErrorCode::None,
                        };
                    }
                    let t = data.drain(..payload_length).collect::<Vec<u8>>();
                    payload_data.extend_from_slice(&t);
                }

                let final_payload = if rsv1 && deflate.enabled {
                    match deflate.decompress(&payload_data) {
                        Ok(decompressed) => decompressed,
                        Err(e) => {
                            log::warn!("WebSocket 解压缩失败: {:?}", e);
                            return Message {
                                mode: MessageMode::Client,
                                message_type: MessageType::Error,
                                payload: vec![],
                                text: "解压缩失败".to_string(),
                                close: CloseCode::InvalidPayloadData,
                                error: ErrorCode::SendingDataFailed,
                            };
                        }
                    }
                } else {
                    payload_data
                };

                let text = String::from_utf8_lossy(&final_payload).into_owned();
                Message {
                    mode: MessageMode::Client,
                    message_type,
                    payload: final_payload,
                    text: text.to_string(),
                    close: CloseCode::NormalClosure,
                    error: ErrorCode::None,
                }
            }
            MessageType::Binary
            | MessageType::Continuation
            | MessageType::Close
            | MessageType::Ping
            | MessageType::Pong => {
                let is_control_frame = matches!(
                    message_type,
                    MessageType::Close | MessageType::Ping | MessageType::Pong
                );

                if is_control_frame && len_flag > MAX_CONTROL_FRAME_PAYLOAD as u8 {
                    log::warn!("控制帧 payload 超过 125 字节: {}", len_flag);
                    return Message {
                        mode: MessageMode::Client,
                        message_type: MessageType::Error,
                        payload: vec![],
                        text: "控制帧过大".to_string(),
                        close: CloseCode::ProtocolError,
                        error: ErrorCode::SendingDataFailed,
                    };
                }

                let payload_length = match len_flag {
                    0..=125 => len_flag as usize,
                    126 => {
                        if data.len() < 2 {
                            return Message::msg_error();
                        }
                        let ext = data.drain(..2).collect::<Vec<u8>>();
                        u16::from_be_bytes([ext[0], ext[1]]) as usize
                    }
                    127 => {
                        if data.len() < 8 {
                            return Message::msg_error();
                        }
                        let ext = data.drain(..8).collect::<Vec<u8>>();
                        u64::from_be_bytes([
                            ext[0], ext[1], ext[2], ext[3], ext[4], ext[5], ext[6], ext[7],
                        ]) as usize
                    }
                    _ => return Message::msg_error(),
                };

                if payload_length > MAX_FRAME_SIZE {
                    log::warn!("帧大小超过限制: {} > {}", payload_length, MAX_FRAME_SIZE);
                    return Message {
                        mode: MessageMode::Client,
                        message_type: MessageType::Error,
                        payload: vec![],
                        text: "消息过大".to_string(),
                        close: CloseCode::MessageTooBig,
                        error: ErrorCode::SendingDataFailed,
                    };
                }

                if masked {
                    if data.len() < payload_length + 4 {
                        return Message::msg_error();
                    }
                    let mask_key = data.drain(..4).collect::<Vec<u8>>();
                    let payload = &data[..payload_length];
                    for i in 0..payload.len() {
                        payload_data.push(payload[i] ^ mask_key[i % 4]);
                    }
                    data.drain(..payload_length);
                } else if data.len() >= payload_length {
                    let t = data.drain(..payload_length).collect::<Vec<u8>>();
                    payload_data.extend_from_slice(&t);
                }

                let should_decompress = rsv1 && deflate.enabled && !is_control_frame;
                let final_payload = if should_decompress {
                    match deflate.decompress(&payload_data) {
                        Ok(decompressed) => decompressed,
                        Err(e) => {
                            log::warn!("WebSocket 解压缩失败: {:?}", e);
                            return Message {
                                mode: MessageMode::Client,
                                message_type: MessageType::Error,
                                payload: vec![],
                                text: "解压缩失败".to_string(),
                                close: CloseCode::InvalidPayloadData,
                                error: ErrorCode::SendingDataFailed,
                            };
                        }
                    }
                } else {
                    payload_data
                };

                let (text, close) = match message_type {
                    MessageType::Close => {
                        let close_code = if final_payload.len() >= 2 {
                            let code = u16::from_be_bytes([final_payload[0], final_payload[1]]);
                            CloseCode::from(code)
                        } else {
                            CloseCode::NormalClosure
                        };
                        let reason = if final_payload.len() > 2 {
                            String::from_utf8_lossy(&final_payload[2..]).into_owned()
                        } else {
                            "客户端关闭".to_string()
                        };
                        (reason, close_code)
                    }
                    MessageType::Ping => {
                        let text = String::from_utf8_lossy(&final_payload).into_owned();
                        (
                            if text.is_empty() {
                                "Ping".to_string()
                            } else {
                                text
                            },
                            CloseCode::NormalClosure,
                        )
                    }
                    MessageType::Pong => {
                        let text = String::from_utf8_lossy(&final_payload).into_owned();
                        (
                            if text.is_empty() {
                                "Pong".to_string()
                            } else {
                                text
                            },
                            CloseCode::NormalClosure,
                        )
                    }
                    MessageType::Binary => (String::new(), CloseCode::NormalClosure),
                    MessageType::Continuation => ("继续加载".to_string(), CloseCode::NormalClosure),
                    _ => (String::new(), CloseCode::NormalClosure),
                };

                Message {
                    mode: MessageMode::Client,
                    message_type,
                    payload: final_payload,
                    text,
                    close,
                    error: ErrorCode::None,
                }
            }
            MessageType::Error => Message {
                mode: MessageMode::Client,
                message_type,
                payload: vec![],
                text: String::new(),
                close: CloseCode::NormalClosure,
                error: ErrorCode::Unknown,
            },
            MessageType::None => Message {
                mode: MessageMode::Client,
                message_type,
                payload: vec![],
                text: String::new(),
                close: CloseCode::NormalClosure,
                error: ErrorCode::None,
            },
            MessageType::TimeOut => Message {
                mode: MessageMode::Client,
                message_type,
                payload: vec![],
                text: String::new(),
                close: CloseCode::NormalClosure,
                error: ErrorCode::TimeOut,
            },
        }
    }
    pub fn send_message(&self, deflate: &DeflateConfig) -> Vec<u8> {
        let mut frame = Vec::new();

        let opcode = self.message_type.to_u8();

        let should_compress = deflate.enabled
            && matches!(self.message_type, MessageType::Text | MessageType::Binary)
            && self.payload.len() > MIN_COMPRESS_SIZE;

        let (payload, rsv1) = if should_compress {
            match deflate.compress(&self.payload) {
                Ok(compressed) if compressed.len() < self.payload.len() => (compressed, true),
                _ => (self.payload.clone(), false),
            }
        } else {
            (self.payload.clone(), false)
        };

        let byte1 = 0x80 | (if rsv1 { 0x40 } else { 0x00 }) | (opcode & 0x0F);
        frame.push(byte1);

        let payload_len = payload.len();
        if payload_len < 126 {
            frame.push(payload_len as u8);
        } else if payload_len <= 65535 {
            frame.push(126);
            frame.extend_from_slice(&(payload_len as u16).to_be_bytes());
        } else {
            frame.push(127);
            frame.extend_from_slice(&(payload_len as u64).to_be_bytes());
        }
        frame.extend_from_slice(&payload);
        frame
    }
    #[must_use]
    pub fn send_close(code: CloseCode, reason: &str) -> Vec<u8> {
        let mut frame = Vec::new();
        frame.push(0x88);
        let reason_bytes = reason.as_bytes();
        let reason_len = reason_bytes.len().min(123);
        let payload_len = 2 + reason_len;
        frame.push(payload_len as u8);
        frame.extend(&code.to_u16().to_be_bytes());
        frame.extend(&reason_bytes[..reason_len]);
        frame
    }
    #[must_use]
    pub fn send_pong(payload: &[u8]) -> Vec<u8> {
        let mut frame = Vec::new();
        frame.push(0x8A); // FIN=1, opcode=0xA (Pong)
        let payload_len = payload.len().min(125);
        frame.push(payload_len as u8);
        frame.extend(&payload[..payload_len]);
        frame
    }
    #[must_use]
    pub fn send_ping(payload: &[u8]) -> Vec<u8> {
        let mut frame = Vec::new();
        frame.push(0x89); // FIN=1, opcode=0x9 (Ping)
        let payload_len = payload.len().min(125);
        frame.push(payload_len as u8);
        frame.extend(&payload[..payload_len]);
        frame
    }
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MessageType {
    /// 文本
    Text,
    Continuation,
    /// 客户端关闭
    Close,
    Binary,
    Ping,
    Pong,
    None,
    TimeOut,
    Error,
}

impl MessageType {
    #[must_use]
    pub fn from(types: u8) -> Self {
        match types {
            0x0 => Self::Continuation,
            0x1 => Self::Text,
            0x2 => Self::Binary,
            0x8 => Self::Close,
            0x9 => Self::Ping,
            0xa => Self::Pong,
            _ => Self::None,
        }
    }
    #[must_use]
    pub fn to_u8(&self) -> u8 {
        match self {
            MessageType::Text => 0x1,
            MessageType::Continuation
            | MessageType::None
            | MessageType::Error
            | MessageType::TimeOut => 0x0,
            MessageType::Close => 0x8,
            MessageType::Binary => 0x2,
            MessageType::Ping => 0x9,
            MessageType::Pong => 0xa,
        }
    }
}
#[derive(Debug, Clone, PartialEq, Eq, Default)]
pub enum CloseCode {
    /// 1000: 正常关闭
    #[default]
    NormalClosure,
    /// 1001: 端点离开 (如服务器关闭或浏览器导航离开)
    GoingAway,
    /// 1002: 协议错误
    ProtocolError,
    /// 1003: 不支持的数据类型
    UnsupportedData,
    /// 1005: 未收到状态码 (保留，不应发送)
    NoStatusReceived,
    /// 1006: 异常关闭 (保留，不应发送)
    AbnormalClosure,
    /// 1007: 无效的帧 payload 数据 (如非 UTF-8 文本)
    InvalidPayloadData,
    /// 1008: 策略违规
    PolicyViolation,
    /// 1009: 消息过大
    MessageTooBig,
    /// 1010: 缺少必需的扩展
    MandatoryExtension,
    /// 1011: 内部服务器错误
    InternalError,
    /// 其它关闭码
    Other(u16),
}

impl CloseCode {
    #[must_use]
    pub fn from_err(err: ErrorCode) -> CloseCode {
        match err {
            ErrorCode::SendingDataFailed => CloseCode::InternalError,
            ErrorCode::ThreadException => CloseCode::InternalError,
            ErrorCode::TimeOut => CloseCode::GoingAway,
            ErrorCode::Unknown | ErrorCode::None => CloseCode::NormalClosure,
        }
    }

    #[must_use]
    pub fn str(&self) -> String {
        match self {
            CloseCode::NormalClosure => "正常关闭",
            CloseCode::GoingAway => "端点离开",
            CloseCode::ProtocolError => "协议错误",
            CloseCode::UnsupportedData => "不支持的数据",
            CloseCode::NoStatusReceived => "未收到状态码",
            CloseCode::AbnormalClosure => "异常关闭",
            CloseCode::InvalidPayloadData => "无效数据",
            CloseCode::PolicyViolation => "策略违规",
            CloseCode::MessageTooBig => "消息过大",
            CloseCode::MandatoryExtension => "缺少扩展",
            CloseCode::InternalError => "内部错误",
            CloseCode::Other(code) => return format!("关闭码 {code}"),
        }
        .to_string()
    }

    #[must_use]
    pub fn to_u16(&self) -> u16 {
        match self {
            CloseCode::NormalClosure => 1000,
            CloseCode::GoingAway => 1001,
            CloseCode::ProtocolError => 1002,
            CloseCode::UnsupportedData => 1003,
            CloseCode::NoStatusReceived => 1005,
            CloseCode::AbnormalClosure => 1006,
            CloseCode::InvalidPayloadData => 1007,
            CloseCode::PolicyViolation => 1008,
            CloseCode::MessageTooBig => 1009,
            CloseCode::MandatoryExtension => 1010,
            CloseCode::InternalError => 1011,
            CloseCode::Other(code) => *code,
        }
    }

    #[must_use]
    pub fn is_valid_for_send(&self) -> bool {
        !matches!(
            self,
            CloseCode::NoStatusReceived | CloseCode::AbnormalClosure
        )
    }
}

impl From<u16> for CloseCode {
    fn from(code: u16) -> Self {
        match code {
            1000 => CloseCode::NormalClosure,
            1001 => CloseCode::GoingAway,
            1002 => CloseCode::ProtocolError,
            1003 => CloseCode::UnsupportedData,
            1005 => CloseCode::NoStatusReceived,
            1006 => CloseCode::AbnormalClosure,
            1007 => CloseCode::InvalidPayloadData,
            1008 => CloseCode::PolicyViolation,
            1009 => CloseCode::MessageTooBig,
            1010 => CloseCode::MandatoryExtension,
            1011 => CloseCode::InternalError,
            _ => CloseCode::Other(code),
        }
    }
}

#[derive(Debug, Clone, Copy)]
pub enum ErrorCode {
    /// 发送数据失败
    SendingDataFailed,
    /// Unknown request error
    Unknown,
    /// 线程异常
    ThreadException,
    /// 超时
    TimeOut,
    None,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MessageMode {
    Client,
    Server,
}

pub struct NoticeMsg {
    pub types: Types,
    pub msg: JsonValue,
    pub timestamp: i64,
    pub channel: String,
    pub user: String,
    pub org: String,
    pub admin: String,
}

impl NoticeMsg {
    pub fn json(&mut self) -> JsonValue {
        object! {
            type:"notice",
            channel: self.channel.clone(),
            msg: self.msg.clone(),
            timestamp: self.timestamp,
        }
    }

    fn now() -> i64 {
        std::time::SystemTime::now()
            .duration_since(std::time::UNIX_EPOCH)
            .unwrap_or_default()
            .as_secs() as i64
    }

    fn push(notice: NoticeMsg) {
        if let Ok(mut queue) = WS_NOTICE.lock() {
            queue.push(notice);
        }
    }

    pub fn to_all(channel: &str, msg: JsonValue) {
        Self::push(NoticeMsg {
            types: Types::All,
            msg,
            timestamp: Self::now(),
            channel: channel.to_string(),
            user: String::new(),
            org: String::new(),
            admin: String::new(),
        });
    }

    pub fn to_org(channel: &str, msg: JsonValue, org: &str) {
        Self::push(NoticeMsg {
            types: Types::Org,
            msg,
            timestamp: Self::now(),
            channel: channel.to_string(),
            user: String::new(),
            org: org.to_string(),
            admin: String::new(),
        });
    }

    pub fn to_user(channel: &str, msg: JsonValue, user: &str) {
        Self::push(NoticeMsg {
            types: Types::User,
            msg,
            timestamp: Self::now(),
            channel: channel.to_string(),
            user: user.to_string(),
            org: String::new(),
            admin: String::new(),
        });
    }

    pub fn to_admin(channel: &str, msg: JsonValue, admin: &str) {
        Self::push(NoticeMsg {
            types: Types::Admin,
            msg,
            timestamp: Self::now(),
            channel: channel.to_string(),
            user: String::new(),
            org: String::new(),
            admin: admin.to_string(),
        });
    }

    pub fn to_channel(channel: &str, msg: JsonValue) {
        Self::push(NoticeMsg {
            types: Types::Channel,
            msg,
            timestamp: Self::now(),
            channel: channel.to_string(),
            user: String::new(),
            org: String::new(),
            admin: String::new(),
        });
    }
}

pub enum Types {
    All,
    User,
    Org,
    Admin,
    Channel,
}