package com.example.greenwatch.repositories;


import android.os.Looper;

import androidx.lifecycle.MutableLiveData;

import com.example.greenwatch.models.Device;
import com.example.greenwatch.communication.WiFiCommunication;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.UUID;

public class DeviceRepository {

    private final int maxAlarmHistoryListSize = 20;
    private final String delimiter = ", ";
    private final String sensorStatusKey = "An";
    private String localDeviceUUID;
    private static DeviceRepository deviceRepositoryInstance;
    private WiFiCommunication mWiFiCommunication;
    private boolean startAlarmRecordingValue;
    private MutableLiveData<Boolean> startAlarmRecording = new MutableLiveData<>();
    private MutableLiveData<List<Device>> deviceList = new MutableLiveData<>();
    private MutableLiveData<List<Device>> alarmHistoryList = new MutableLiveData<>();
    private HashMap<String, Device> connectedDevicesList = new HashMap<>();
    private HashMap<String, String> deviceIDMapper = new HashMap<>();
    private List<Device> alarmHistoryDeviceList = new ArrayList<>();

    private DeviceRepository() {
        setLocalDeviceUUID();
        startAlarmRecordingValue = false;
    }

    public static synchronized DeviceRepository getInstance() {
        if (deviceRepositoryInstance == null){
            deviceRepositoryInstance = new DeviceRepository();
        }
        return deviceRepositoryInstance;
    }

    public void setWiFiCommunication(WiFiCommunication wiFiCommunication) {
        if (mWiFiCommunication == null) {
            this.mWiFiCommunication = wiFiCommunication;
        }

    }

    public MutableLiveData<List<Device>> getConnectedDeviceList() {
        setMutableLiveDataDeviceList();
        return deviceList;
    }

    public MutableLiveData<List<Device>> getAlarmHistoryDeviceList() {
        setMutableLiveDataAlarmHistoryList();
        return alarmHistoryList;
    }

    public MutableLiveData<Boolean> getStartAlarmRecording() {
        setMutableLiveDataStartAlarmRecording();
        return startAlarmRecording;
    }

    public void createNewDevice(String timeStamp, String deviceID, boolean sensorStatus, String sensorType, float sensorMassage){
        Device newDevice = new Device(timeStamp, deviceID, sensorStatus, sensorType, sensorMassage);
        if (sensorStatus) {
            setAlarmHistoryDeviceList(newDevice);
        }
        boolean newStartAlarmRecordingValue = checkDeviceStatus();
        if (startAlarmRecordingValue != newStartAlarmRecordingValue) {
            startAlarmRecordingValue = newStartAlarmRecordingValue;
            setMutableLiveDataStartAlarmRecording();
        }
        addToConnectedDeviceList(newDevice.getDeviceID(), newDevice);
        setMutableLiveDataDeviceList();
    }

    public void getNewReceivedMessage(String newMessage) {
        String[] messageString = messageStringSplitter(newMessage);
        if(messageString[0].equals("1") && messageString.length == 7) {
            String timeStamp = messageString[1];
            String deviceID = messageString[3];
            boolean sensorStatus = convertRecievedSensorStatus(messageString[4]);
            String sensorType = messageString[5];
            float sensorMassage = Float.valueOf(messageString[6]);

            if (deviceID.equals(checkDeviceID(localDeviceUUID))) {
                return;
            }

            if (!connectedDevicesList.containsKey(deviceID)) {
                createNewDevice(timeStamp, deviceID, sensorStatus, sensorType, sensorMassage);
            } else {
                updateDevice(deviceID, timeStamp, sensorStatus, sensorType, sensorMassage);
            }
        }
    }

    private String messageStringBuilder(String deviceID) {
        StringBuilder message = new StringBuilder();
        Device device = connectedDevicesList.get(deviceID);
        if(device != null) {
            message.append("1")
                    .append(delimiter)
                    .append(device.getTimeStamp())
                    .append(delimiter)
                    .append("Gruppe3")
                    .append(delimiter)
                    .append(device.getDeviceID())
                    .append(delimiter)
                    .append(convertSendSensorStatus(device.getSensorStatus()))
                    .append(delimiter)
                    .append(device.getSensorType())
                    .append(delimiter)
                    .append(device.getSensorMassage());
        }
        else {
            message.append("1")
                    .append(delimiter)
                    .append("")
                    .append(delimiter)
                    .append("Gruppe3")
                    .append(delimiter)
                    .append("")
                    .append(delimiter)
                    .append("")
                    .append(delimiter)
                    .append("")
                    .append(delimiter)
                    .append("");
        }
        return message.toString();
    }

    public String getLocalDeviceUUID() {
        return localDeviceUUID;
    }

    public void updateDevice(String deviceID, String timeStamp, boolean sensorStatus, String sensorType, float sensorMassage) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            device.setTimeStamp(timeStamp);
            device.setSensorType(sensorType);
            device.setSensorMassage(sensorMassage);
            if (!device.getSensorStatus() && sensorStatus) {
                setAlarmHistoryDeviceList(device);
            }
            device.setSensorStatus(sensorStatus);
            boolean newStartAlarmRecordingValue = checkDeviceStatus();
            if (startAlarmRecordingValue != newStartAlarmRecordingValue) {
                startAlarmRecordingValue = newStartAlarmRecordingValue;
                setMutableLiveDataStartAlarmRecording();
            }
            addToConnectedDeviceList(checkedDeviceID, device);
            setMutableLiveDataDeviceList();
        }
    }

    public void setTimeStamp(String deviceID, String timeStamp) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            device.setTimeStamp(timeStamp);
            addToConnectedDeviceList(checkedDeviceID, device);
            setMutableLiveDataDeviceList();
        }
    }

    public String getTimeStamp(String deviceID) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            return device.getTimeStamp();
        }
        return "";
    }

    public void setDeviceID(String deviceID, String newDeviceID) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            device.setDeviceID(newDeviceID);
            setDeviceIDMapper(newDeviceID);
            connectedDevicesList.remove(checkedDeviceID);
            addToConnectedDeviceList(newDeviceID, device);
            setMutableLiveDataDeviceList();
        }
    }

    public String getDeviceID(String deviceID) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            return device.getDeviceID();
        }
        return "";
    }

    public void setSensorStatus(String deviceID, boolean sensorStatus) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            if (!device.getSensorStatus() && sensorStatus) {
                setAlarmHistoryDeviceList(device);
            }
            device.setSensorStatus(sensorStatus);
            boolean newStartAlarmRecordingValue = checkDeviceStatus();
            if (startAlarmRecordingValue != newStartAlarmRecordingValue) {
                startAlarmRecordingValue = newStartAlarmRecordingValue;
                setMutableLiveDataStartAlarmRecording();
            }
            addToConnectedDeviceList(checkedDeviceID, device);
            setMutableLiveDataDeviceList();

        }
    }

    public boolean getSensorStatus(String deviceID) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            return device.getSensorStatus();
        }
        return false;
    }

    public void setSensorType(String deviceID, String sensorType) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            device.setSensorType(sensorType);
            addToConnectedDeviceList(checkedDeviceID, device);
            setMutableLiveDataDeviceList();
        }
    }

    public String getSensorType(String deviceID) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            return device.getSensorType();
        }
        return "";
    }

    public void setSensorMassage(String deviceID, float sensorMessage) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            device.setSensorMassage(sensorMessage);
            addToConnectedDeviceList(checkedDeviceID, device);
            setMutableLiveDataDeviceList();
        }
    }

    public float getSensorMassage(String deviceID) {
        String checkedDeviceID = checkDeviceID(deviceID);
        Device device = connectedDevicesList.get(checkedDeviceID);
        if(device != null) {
            return device.getSensorMassage();
        }
        return 0;
    }

    public String getSystemTimeStamp() {
        SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
        Date date = new Date(System.currentTimeMillis());
        return formatter.format(date);
    }

    private void setMutableLiveDataDeviceList() {
        List<Device> list = new ArrayList<>(connectedDevicesList.values());
        if (Looper.myLooper() == Looper.getMainLooper()){
            deviceList.setValue(list);
        }
        else {
            deviceList.postValue(list);
        }
    }

    private void setMutableLiveDataAlarmHistoryList() {
        alarmHistoryList.setValue(alarmHistoryDeviceList);
    }

    private void setMutableLiveDataStartAlarmRecording() {
        startAlarmRecording.setValue(startAlarmRecordingValue);
    }

    private void addToConnectedDeviceList(String key, Device device) {
        connectedDevicesList.put(key, device);
        if (key.equals(checkDeviceID(localDeviceUUID))) {
            mWiFiCommunication.setNewMessage(messageStringBuilder(device.getDeviceID()),true);
        }
    }

    private String checkDeviceID(String deviceID) {
        if(!deviceIDMapper.isEmpty() && deviceID.equals(localDeviceUUID)) {
            return deviceIDMapper.get(deviceID);
        }
        return deviceID;
    }

    private void setDeviceIDMapper(String deviceID) {
        deviceIDMapper.put(localDeviceUUID, deviceID);
    }

    private void setLocalDeviceUUID(){
        this.localDeviceUUID = UUID.randomUUID().toString();
    }

    private String[] messageStringSplitter(String message) {
        return message.split(delimiter);
    }

    private boolean convertRecievedSensorStatus(String status) {
        return status.equals(sensorStatusKey);
    }

    private String convertSendSensorStatus(boolean status) {
        if (status){
            return "An";
        }
        else {
            return "Aus";
        }
    }

    private void setAlarmHistoryDeviceList(Device device) {
        if (alarmHistoryDeviceList.size() == maxAlarmHistoryListSize) {
            alarmHistoryDeviceList.remove(alarmHistoryDeviceList.size() -1);
        }
        Device alarmHistoryDevice = new Device(device.getTimeStamp(), device.getDeviceID(), device.getSensorStatus(), device.getSensorType(), device.getSensorMassage());
        alarmHistoryDeviceList.add(0, alarmHistoryDevice);
        setMutableLiveDataAlarmHistoryList();
    }

    private boolean checkDeviceStatus() {
        for (Device device : connectedDevicesList.values()) {
            if (device.getSensorStatus()) {
                return true;
            }
        }
        return false;
    }
}