package com.doumee.keyCabinet.utils.i485;

import android.serialport.SerialPort;
import android.util.Log;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

public class SerialPortModel {

    public static final String TAG = SerialPortModel.class.getSimpleName();

    private void logI(String str) {
        Log.i(TAG, str);
    }

    private String serialPortPath;
    private int baudrate;
    private int dataBits;
    private int stopBits;
    private int parity;
    private SerialPort serialPort;
    private ScheduledExecutorService scheduledExecutorService;
    private ExecutorService singleThreadExecutor;
    private ScheduledFuture scheduledFuture;
    private SerialPortReadObserver serialPortReadObserver;
    private boolean isOk = false;

    private final Object writeLock = new Object();

    public SerialPortModel(String serialPortPath, int baudrate, int dataBits, int stopBits, int parity,SerialPortReadObserver portReadObserver) {
        this.serialPortPath = serialPortPath;
        this.baudrate = baudrate;
        this.dataBits = dataBits;
        this.stopBits = stopBits;
        this.parity = parity;
        this.serialPortReadObserver = portReadObserver;
    }

    public boolean open() {
        try {
            File device = new File(serialPortPath);
            serialPort = SerialPort
                    .newBuilder(device, baudrate)
                    .dataBits(dataBits)
                    .stopBits(stopBits)
                    .parity(parity)
                    .build();
            scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
            singleThreadExecutor = Executors.newSingleThreadExecutor();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    public void close() {
        try {
            serialPort.getInputStream().close();
            serialPort.getOutputStream().close();
            serialPort.close();
            serialPort = null;
            scheduledExecutorService.shutdown();
            singleThreadExecutor.shutdown();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void startRead() {
        scheduledFuture = scheduledExecutorService.scheduleWithFixedDelay(() -> {
            InputStream inputStream = serialPort.getInputStream();
            byte[] bytes = new byte[2048];
            int length = 0;
            try {
                length = inputStream.read(bytes);
            } catch (IOException e) {
                e.printStackTrace();
            }
//            logI("startRead - length: " + length);
            if (length <= 0) return;
            //String result = new String(bytes, 0, length);
            byte[] bytes2 = new byte[length];
            for(int i=0;i<length;i++){
                bytes2[i] = bytes[i];
            }
            if(serialPortReadObserver!=null) {
                serialPortReadObserver.onResultBytes(bytes2);
            }
        }, 0, 100, TimeUnit.MILLISECONDS);
    }

    public void stopRead() {
        scheduledFuture.cancel(true);
    }

    public void write(byte[] bytes) {
        singleThreadExecutor.execute(() -> {
            synchronized (writeLock) {
                try {
                    serialPort.getOutputStream().write(bytes);
                    if(serialPortReadObserver!=null) {
                        serialPortReadObserver.onResult(null);
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                    if(serialPortReadObserver!=null) {
                        serialPortReadObserver.onResult(e.getMessage());
                    }
                }
            }
        });
    }

    public boolean isOk() {
        return isOk;
    }

    public void setOk(boolean ok) {
        isOk = ok;
    }
}