var pcsc = require('pcsclite');
var iconv = require('iconv-lite');


var pcsc = pcsc();
pcsc.on('reader', function(reader) {

    console.log('New reader detected', reader.name);

    reader.on('error', function(err) {
        console.log('Error(', this.name, '):', err.message);
    });

    reader.on('status', function(status) {
        // console.log('Status(', this.name, '):', status);
        // console.log(status.atr.toString());
        /* check what has changed */
        var changes = this.state ^ status.state;
        if (changes) {
            if ((changes & this.SCARD_STATE_EMPTY) && (status.state & this.SCARD_STATE_EMPTY)) {
                console.log("\n=== 卡片已拔除");/* card removed */
                reader.disconnect(reader.SCARD_LEAVE_CARD, function(err) {
                    if (err) {
                        console.log(err);
                    } else {
                        // console.log('== 已設定');
                    }
                });
            } else if ((changes & this.SCARD_STATE_PRESENT) && (status.state & this.SCARD_STATE_PRESENT)) {
                console.log("\n=== 讀取到卡片");/* card inserted */
                reader.connect({ share_mode : this.SCARD_SHARE_SHARED }, function(err, protocol) {
                    if (err) {
                        console.log(err);
                    } else {
                        // console.log('Protocol(', reader.name, '):', protocol);
                        // reader.transmit(new Buffer([0x00, 0xB0, 0x00, 0x00, 0x20]), 40, protocol, function(err, data) {
                        //     if (err) {
                        //         console.log(err);
                        //     } else {
                        //         console.log('Data received', data);
                        //         // reader.close();
                        //         // pcsc.close();
                        //     }
                        // });


                        reader.transmit(new Buffer([0xFF, 0xCA, 0x00, 0x00, 0x00]), 40, protocol, function(err, data) {
                            if (err) {
                                console.log(err);
                            }

                            if(data.length == 2){
                                //not mifare card;
                                return true;
                            }


                            var hexs = [];
                            for(var i =0 ; i < data.length;++i){
                                if(data[i] == 0x90 && i < data.length-1 && data[i+1] == 0x00){
                                    break;
                                }
                                hexs.push(data[i].toString(16));
                            }
                            hexs = hexs.reverse();

                            console.log(' 悠遊卡感應結果 hex:'+ hexs.join(""),"tag id:",parseInt(hexs.join(""),16));

                            //感應到:D01ACD76 ,tag = 76CD1AD0, num= 1993153232


                        });

                        reader.transmit(new Buffer([0x00, 0xA4, 0x04, 0x00, 0x10, 0xD1, 0x58, 0x00, 0x00, 0x01, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x00 ]),40,protocol,(err,data)=>{

                            reader.transmit(new Buffer([0x00, 0xca, 0x11, 0x00, 0x02, 0x00, 0x00]), 59, protocol, function(err, data) {
                                if (err) {
                                    console.log(err);
                                    return true;
                                } 

                                 if(data.length == 2){
                                    //not 健保卡;
                                    return true;
                                }

                                var buffToString = function(buff){
                                    for(var i = 0 ; i < buff.length;++i){
                                        if(buff[i] == 0x00){
                                            return iconv.decode(buff.slice(0,i), 'Big5');
                                        }
                                    }

                                    return iconv.decode(buff, 'Big5');  
                                };
                                var card_id = data.slice(0,12).toString(),
                                    name =  buffToString(data.slice(12,32)),
                                    identify =  data.slice(32,42).toString(),
                                    birthday =  
                                        data.slice(42,45).toString()+"/"+
                                        data.slice(45,47).toString()+"/"+
                                        data.slice(47,49).toString(),
                                    gender = data.slice(49,50).toString(),
                                    publish_date =  
                                        data.slice(50,53).toString()+"/"+
                                        data.slice(53,55).toString()+"/"+
                                        data.slice(55,57).toString();

                                // console.log(' 健保卡  原始資料',data.length,data);
                                console.log(' 健保卡感應結果： \n'+JSON.stringify({
                                        card_id:card_id.substring(0,4)+"******"+card_id.substring(10),
                                        name,
                                        identify: identify.substring(0,2)+"*****"+identify.substring(7),
                                        birthday,gender, publish_date}));

                                // console.log("sam hex:"+ hexs.join(""),"tag id:",parseInt(hexs.join(""),16));

                                //感應到:D01ACD76 ,tag = 76CD1AD0, num= 1993153232


                                // reader.close();
                                // pcsc.close();
                            });
                        });
                        
                    }
                });
            }
        }
    });

    reader.on('end', function() {
        console.log('Reader',  this.name, 'removed');
    });
});

pcsc.on('error', function(err) {
    console.log('PCSC error', err.message);
});