package com.iflytop.a800.device;
import com.iflytop.a800.model.MdbIdChip;
import com.iflytop.uf.UfActuatorCmdExecutor;
import com.iflytop.uf.UfEventBus;
import com.iflytop.uf.model.UfMdbNotification;
import com.iflytop.uf.util.UfCommon;
import org.springframework.util.DigestUtils;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.Base64;
import java.util.List;

public class IdChipReader {
    // constructor
    public IdChipReader() {
        UfEventBus.getInstance().on("ZCanCmderWebSocketEvent", this::handleZCanCmderWebSocketEvent);
    }

    // 事件处理
    public void handleZCanCmderWebSocketEvent(Object ... args) {
        Integer eventId = (Integer)args[0];
        if ( 0x71C8 == eventId ) { // ID 卡插入
            UfMdbNotification.action("IdChipInsert");
        }
//        if ( 0x71C9 == eventId ) { // ID 拔出
//            UfMdbNotification.action("IdChipPullout");
//        }
    }

    // 读取数据
    public MdbIdChip read() {
        var buffer = this.readToByteBuffer();

        // parse to model
        var chip = new MdbIdChip();
        // item name
        byte[] itemNameBytes = new byte[15];
        buffer.get(0x0001, itemNameBytes);
        for (int i = 0; i < itemNameBytes.length; i++) {
            itemNameBytes[i] = -1 == itemNameBytes[i] ? 0 : itemNameBytes[i];
        }
        chip.itemName = new String(itemNameBytes);
        chip.itemName = chip.itemName.trim();

        // lot code
        byte[] lotCodeBytes = new byte[12];
        buffer.get(0x0010, lotCodeBytes);
        for (int i = 0; i < lotCodeBytes.length; i++) {
            lotCodeBytes[i] = -1 == lotCodeBytes[i] ? 0 : lotCodeBytes[i];
        }
        chip.lotCode = new String(lotCodeBytes);
        chip.lotCode = chip.lotCode.trim();

        // expire date
        byte expYear = buffer.get(0x001C);
        byte expMon = buffer.get(0x001D);
        byte expDay = buffer.get(0x001E);
        chip.expiredDate = String.format("20%02x-%02x-%02x", expYear, expMon, expDay);

        // version
        chip.version = Integer.toString(buffer.get(0x0021));

        // hash
        byte itemCode = buffer.get(0x001F);
        chip.hash = String.format("%d-%s-%s-%s", itemCode, chip.lotCode, chip.expiredDate, chip.version);
        chip.hash = DigestUtils.md5DigestAsHex(chip.hash.getBytes());

        return chip;
    }

    // read id chip data to buffer
    private ByteBuffer readToByteBuffer() {
        var sectorSizeStr = UfActuatorCmdExecutor.execute("IdCardReader", "module_get_reg", "10301");
        var sectorSize = Integer.parseInt(sectorSizeStr);
        var sectorNumStr = UfActuatorCmdExecutor.execute("IdCardReader", "module_get_reg", "10302");
        var sectorNum = Integer.parseInt(sectorNumStr);

        // read bytes
        List<Byte> data = new ArrayList<>();
        for (int i = 0; i<sectorNum; i++ ) {
            String readParam = Integer.toString(i);
            String response = UfActuatorCmdExecutor.execute("IdCardReader","a8000_idcard_reader_read_raw", readParam);
            Base64.Decoder decoder = Base64.getDecoder();
            byte[] bytes = decoder.decode(response);
            for (byte aByte : bytes) {
                data.add(aByte);
            }
        }

        // convert to buffer
        byte[] result = new byte[data.size()];
        for ( int i = 0; i < data.size(); i++ ) {
            result[i] = data.get(i);
        }
        var buffer = ByteBuffer.wrap(result);
        buffer.order(ByteOrder.LITTLE_ENDIAN);
        return buffer;
    }
}