const net = require('net');

module.exports = (app) => {
    const { middleware } = app;
    const shunt = middleware.shunt;

    net.createServer(function (socket) {
        socket.on('lookup', function (data) {
            console.log(data);
            console.log('lookup')
        });
        socket.on('connection', function (data) {
            console.log(data);
            console.log('socket客户端已连接');
        });
        socket.on('data', async function (data) {
            let response = "000000068100";
            socket.write(Buffer.from(response, 'hex'));
            let value = data.toString('hex');
            if (value.length > 60) {
                let Msg_id_len, length, Msg_id, msgID, snNumber, Total_len, Cmd_code, Token, Content_len, Content, msgData;
                Msg_id_len = value.slice(50, 52);
                length = 52 + parseInt(Msg_id_len, 16) * 2;
                Msg_id = value.slice(52, length);
                msgID = Buffer.from(Msg_id, 'hex').toString();
                snNumber = msgID.split("_")[0].padStart(8, '0');
                if (/^\d+$/.test(snNumber) && !/^0+$/.test(snNumber)) {
                    Total_len = value.slice(0, 8);
                    Cmd_code = value.slice(8, 10);
                    Token = value.slice(10, 50);
                    Content_len = value.slice(length, length + 4);
                    Content = value.slice(length + 4, value.length);
                    msgData = Buffer.from(Content, 'hex').toString('ascii');
                    // socket接收消息后触发事件监听器，将消息发送给websocket客户端并存储在数据库中
                    shunt.socketEmitter().emit(snNumber, { msg_data: msgData, created_at: new Date() });
                    const shortMsg = await app.curl('http://127.0.0.1:' + app.server.address().port + '/shortMsg', {
                        dataType: 'json',
                        contentType: 'application/x-www-form-urlencoded',
                        method: 'POST',
                        timeout: 3000,
                        data: {
                            sn_number: snNumber,
                            original_msg: value,
                            msg_data: msgData,
                            created_at: new Date()
                        },
                    });
                    if (shortMsg.data.code == 404) {
                        await app.curl('http://127.0.0.1:' + app.server.address().port + '/saveUnknown', {
                            dataType: 'json',
                            contentType: 'application/x-www-form-urlencoded',
                            method: 'POST',
                            timeout: 3000,
                            data: {
                                msg_id: msgID,
                                sn_number: snNumber,
                                original_msg: value,
                                msg_data: msgData,
                                created_at: new Date()
                            },
                        });
                    }
                }
            }
        });
        socket.on('end', function (data) {
            console.log(data);
            console.log('end');
        });
        socket.on('timeout', function (data) {
            console.log(data);
            console.log('空闲超时');
        });
        socket.on('drain', function (data) {
            console.log(data);
            console.log('写缓存为空');
        });
        socket.on('error', function (data) {
            console.log(data);
            console.log('发生错误');
        });
        socket.on('close', function (data) {
            console.log(data);
            console.log('socket客户端已断开连接');
        });
        socket.pipe(socket);
    }).listen(8100, function () {
        console.log('socket服务器已启动，监听端口：8100');
    });
}