###
#
# This file controls the 'external' job control manager, that (periodically #
# looks / somehow is pushed an event?) picks up new jobs, and processes them.
# 
# It then stores the progress/status, etc. in job and joblog tables as needed
# via wrapper functions.
#
# The whole pa_job_manager is multi-threaded, and uses the database tables for
# state management and communication back to the pa web site
#
###

# pylint: disable=no-member


# global debug setting
DEBUG=1

### SQLALCHEMY IMPORTS ###

from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, Sequence, Float, ForeignKey, DateTime, LargeBinary, Boolean
from sqlalchemy.exc import SQLAlchemyError
from sqlalchemy.orm import relationship
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.orm import scoped_session

### SQLALCHEMY IMPORTS ###

### LOCAL FILE IMPORTS ###

from shared import DB_URL, PA_JOB_MANAGER_HOST, PA_JOB_MANAGER_PORT, THUMBSIZE, SymlinkName
from datetime import datetime, timedelta, date

### PYTHON LIB IMPORTS ###
import pytz
import time
import os
import glob
from PIL import Image, ImageOps
from pymediainfo import MediaInfo
import hashlib
import exifread
import base64
import numpy
import cv2
import socket
import threading
import io
import face_recognition
import re
import sys


# this is required to handle the duplicate processing code
sys.setrecursionlimit(50000)

# a Manager, which the Session will use for connection resources
some_engine = create_engine(DB_URL)

# create a configured "Session" class
#Session = sessionmaker(bind=some_engine)

# create a Session

session_factory = sessionmaker(bind=some_engine)
Session = scoped_session(session_factory)
session = Session()

Base = declarative_base()


################################################################################
# Class describing File in the database, and via sqlalchemy, connected to the DB as well
# This has to match one-for-one the DB table
################################################################################
class PathType(Base):
    __tablename__ = "path_type"
    id = Column(Integer, Sequence('path_type_id_seq'), primary_key=True )
    name = Column(String, unique=True, nullable=False )

    def __repr__(self):
        return f"<id: {self.id}, name={self.name}"


class PathDirLink(Base):
    __tablename__ = "path_dir_link"
    path_id = Column(Integer, ForeignKey("path.id"), primary_key=True )
    dir_eid = Column(Integer, ForeignKey("dir.eid"), primary_key=True )

    def __repr__(self):
        return f"<path_id: {self.path_id}, dir_eid: {self.dir_eid}>"

class EntryDirLink(Base):
    __tablename__ = "entry_dir_link"
    entry_id = Column(Integer, ForeignKey("entry.id"), primary_key=True )
    dir_eid = Column(Integer, ForeignKey("dir.eid"), primary_key=True )

    def __repr__(self):
        return f"<entry_id: {self.entry_id}, dir_eid: {self.dir_eid}>"

class Path(Base):
    __tablename__ = "path"
    id = Column(Integer, Sequence('path_id_seq'), primary_key=True )
    type_id = Column(Integer, ForeignKey("path_type.id"))
    type = relationship("PathType")
    path_prefix = Column(String, unique=True, nullable=False )
    num_files = Column(Integer)

    def __repr__(self):
        return f"<id: {self.id}, type={self.type}, path_prefix={self.path_prefix}>"

class Dir(Base):
    __tablename__ = "dir"
    eid = Column(Integer, ForeignKey("entry.id"), primary_key=True )
    rel_path = Column(String, unique=True, nullable=False )
    in_path = relationship("Path", secondary="path_dir_link", uselist=False)
    last_import_date = Column(Float)

    def PathOnFS(self):
        return self.in_path.path_prefix+'/'+self.rel_path

    def __repr__(self):
        return f"<eid: {self.eid}, rel_path: {self.rel_path}, in_path={self.in_path}, last_import_date: {self.last_import_date}>"

class Entry(Base):
    __tablename__ = "entry"
    id = Column(Integer, Sequence('file_id_seq'), primary_key=True )
    name = Column(String, unique=False, nullable=False )
    type_id = Column(Integer, ForeignKey("file_type.id"))
    exists_on_fs=Column(Boolean)
    type=relationship("FileType")
    dir_details = relationship( "Dir", uselist=False )
    file_details = relationship( "File", uselist=False )
    in_dir = relationship ("Dir", secondary="entry_dir_link", uselist=False )

    def FullPathOnFS(self):
        s=self.in_dir.in_path.path_prefix + '/' 
        if len(self.in_dir.rel_path) > 0:
            s += self.in_dir.rel_path + '/'
        s += self.name
        return s

    def __repr__(self):
        return f"<id: {self.id}, name: {self.name}, type={self.type}, exists_on_fs={self.exists_on_fs}, dir_details={self.dir_details}, file_details={self.file_details}, in_dir={self.in_dir}>"

class FileRefimgLink(Base):
    __tablename__ = "file_refimg_link"
    file_id = Column(Integer, ForeignKey('file.eid'), unique=True, nullable=False, primary_key=True)
    refimg_id = Column(Integer, ForeignKey('refimg.id'), unique=True, nullable=False, primary_key=True)
    when_processed = Column(Float)
    matched = Column(Boolean)

    def __repr__(self):
        return f"<file_id: {self.file_id}, refimg_id: {self.refimg_id} when_processed={self.when_processed}, matched={self.matched}"

class File(Base):
    __tablename__ = "file"
    eid = Column(Integer, ForeignKey("entry.id"), primary_key=True )
    size_mb = Column(Integer, unique=False, nullable=False)
    hash = Column(Integer, unique=True, nullable=True)
    thumbnail = Column(String, unique=False, nullable=True)
    year = Column(Integer)
    month = Column(Integer)
    day = Column(Integer)
    woy = Column(Integer)
    last_hash_date = Column(Float)
    faces = Column( LargeBinary )
    faces_created_on = Column(Float)

    def __repr__(self):
        return f"<eid: {self.eid}, size_mb={self.size_mb}, hash={self.hash}, last_hash_date: {self.last_hash_date}>"

class DelFile(Base):
    __tablename__ = "del_file"
    file_eid = Column(Integer, ForeignKey("file.eid"), primary_key=True )
    orig_path_prefix = Column(String, unique=False )

    def __repr__(self):
        return f"<file_eid: {self.file_eid}, orig_path_prefix={self.orig_path_prefix}>"


class FileType(Base):
    __tablename__ = "file_type"
    id = Column(Integer, Sequence('file_type_id_seq'), primary_key=True )
    name = Column(String, unique=True, nullable=False )

    def __repr__(self):
        return f"<id: {self.id}, name={self.name}>"

class Settings(Base):
    __tablename__ = "settings"
    id = Column(Integer, Sequence('settings_id_seq'), primary_key=True )
    import_path = Column(String)
    storage_path = Column(String)
    recycle_bin_path = Column(String)

    def __repr__(self):
        return f"<id: {self.id}, import_path: {self.import_path}, recycle_bin_path: {self.recycle_bin_path}>"
        
class PersonRefimgLink(Base):
    __tablename__ = "person_refimg_link"
    person_id = Column(Integer, ForeignKey('person.id'), unique=True, nullable=False, primary_key=True)
    refimg_id = Column(Integer, ForeignKey('refimg.id'), unique=True, nullable=False, primary_key=True)

    def __repr__(self):
        return f"<person_id: {self.person_id}, refimg_id: {self.refimg_id}>"

class Person(Base):
    __tablename__ = "person"
    id = Column(Integer, Sequence('person_id_seq'), primary_key=True )
    tag = Column(String(48), unique=False, nullable=False)
    surname = Column(String(48), unique=False, nullable=False)
    firstname = Column(String(48), unique=False, nullable=False)
    refimg = relationship('Refimg', secondary=PersonRefimgLink.__table__)

    def __repr__(self):
        return f"<tag: {self.tag}, firstname: {self.firstname}, surname: {self.surname}, refimg: {self.refimg}>"

class Refimg(Base):
    __tablename__ = "refimg"
    id = Column(Integer, Sequence('refimg_id_seq'), primary_key=True )
    fname = Column(String(256), unique=True, nullable=False)
    encodings = Column(LargeBinary)
    created_on = Column(Float)

    def __repr__(self):
        return f"<id: {self.id}, fname: {self.fname}, created_on: {self.created_on}, encodings: {self.encodings}>"



################################################################################
# classes for the job manager:
#    Job (and Joblog, JobExtra) for each Job, and 
#    PA_Jobmanager_fe_message (to pass messages to the front-end web)
################################################################################
class Joblog(Base):
    __tablename__ = "joblog"
    id = Column(Integer, Sequence('joblog_id_seq'), primary_key=True )
    job_id = Column(Integer, ForeignKey('job.id') )
    log_date = Column(DateTime(timezone=True))
    log = Column(String)

    def __repr__(self):
        return "<id: {}, job_id: {}, log_date: {}, log: {}".format(self.id, self.job_id, self.log_date, self.log )

class JobExtra(Base):
    __tablename__ = "jobextra"
    id = Column(Integer, Sequence('jobextra_id_seq'), primary_key=True )
    job_id = Column(Integer, ForeignKey('job.id') )
    name = Column(String)
    value = Column(String)

    def __repr__(self):
        return "<id: {}, job_id: {}, name: {}, value: {}>".format(self.id, self.job_id, self.name, self.value )

class Job(Base):
    __tablename__ = "job"
    id = Column(Integer, Sequence('job_id_seq'), primary_key=True )
    start_time = Column(DateTime(timezone=True))
    last_update = Column(DateTime(timezone=True))
    name = Column(String)
    state = Column(String)
    num_files = Column(Integer)
    current_file_num = Column(Integer)
    current_file = Column(String)
    wait_for = Column(Integer)
    pa_job_state = Column(String)

    logs = relationship( "Joblog")
    extra = relationship( "JobExtra")

    def __repr__(self):
        return "<id: {}, start_time: {}, last_update: {}, name: {}, state: {}, num_files: {}, current_file_num: {}, current_file: {}, pa_job_state: {}, wait_for: {}, extra: {}, logs: {}>".format(self.id, self.start_time, self.last_update, self.name, self.state, self.num_files, self.current_file_num, self.current_file, self.pa_job_state, self.wait_for, self.extra, self.logs)

class PA_JobManager_FE_Message(Base):
    __tablename__ = "pa_job_manager_fe_message"
    id = Column(Integer, Sequence('pa_job_manager_fe_message_id_seq'), primary_key=True )
    job_id = Column(Integer, ForeignKey('job.id') )
    alert = Column(String)
    message = Column(String)
    def __repr__(self):
        return "<id: {}, job_id: {}, alert: {}, message: {}".format(self.id, self.job_id, self.alert, self.message)

##############################################################################
# Util (non Class) functions
##############################################################################
def MessageToFE( job_id, alert, message ):
    msg = PA_JobManager_FE_Message( job_id=job_id, alert=alert, message=message)
    session.add(msg)
    session.commit()
    return msg.id

def ProcessRecycleBinDir(parent_job):
    settings = session.query(Settings).first()
    if settings == None:
        raise Exception("Cannot create file data with no settings / recycle bin path is missing")
    paths = settings.recycle_bin_path.split("#")
    ptype = session.query(PathType).filter(PathType.name=='Bin').first().id
    JobsForPaths( parent_job, paths, ptype )
    return

def ProcessStorageDirs(parent_job):
    settings = session.query(Settings).first()
    if settings == None:
        raise Exception("Cannot create file data with no settings / storage path is missing")
    paths = settings.storage_path.split("#")
    ptype = session.query(PathType).filter(PathType.name=='Storage').first().id
    JobsForPaths( parent_job, paths, ptype )
    return

def ProcessImportDirs(parent_job):
    settings = session.query(Settings).first()
    if settings == None:
        raise Exception("Cannot create file data with no settings / import path is missing")
    paths = settings.import_path.split("#")
    ptype = session.query(PathType).filter(PathType.name=='Import').first().id
    JobsForPaths( parent_job, paths, ptype )
    return

def JobsForPaths( parent_job, paths, ptype ):
    now=datetime.now(pytz.utc)
    # make new set of Jobs per path... HandleJobs will make them run later
    path_type = session.query(PathType).get(ptype)
    for path in paths:
        p=session.query(Path).filter(Path.path_prefix==SymlinkName(path_type.name,path,path+'/')).first()
        cfn=0
        if p:
            cfn=p.num_files
            
        jex=JobExtra( name="path", value=path )
        jex2=JobExtra( name="path_type", value=ptype )
        job=Job(start_time=now, last_update=now, name="importdir", state="New", wait_for=None, pa_job_state="New", current_file_num=0, num_files=cfn )
        job.extra.append(jex)
        job.extra.append(jex2)
        session.add(job)
        session.commit()
        if parent_job:
            AddLogForJob(parent_job, "adding <a href='/job/{}'>job id={} {}</a>".format( job.id, job.id, job.name ) )
        # force commit to make job.id be valid in use of wait_for later
        session.commit()
        jex2=JobExtra( name="path", value=path )
        job2=Job(start_time=now, last_update=now, name="getfiledetails", state="New", wait_for=job.id, pa_job_state="New", current_file_num=0 )
        job2.extra.append(jex2)
        session.add(job2)
        session.commit()
        if parent_job:
            AddLogForJob(parent_job, "adding <a href='/job/{}'>job id={} {}</a> (wait for: {})".format( job2.id, job2.id, job2.name, job2.wait_for ) )

        """
        jex3=JobExtra( name="path", value=path )
        job3=Job(start_time=now, last_update=now, name="processai", state="New", wait_for=job2.id, pa_job_state="New", current_file_num=0 )
        job3.extra.append(jex4)
        session.add(job3)
        session.commit()
        if parent_job:
            AddLogForJob(parent_job, "adding <a href='/job/{}'>job id={} {}</a> (wait for: {})".format( job3.id, job3.id, job3.name, job3.wait_for ) )
        """
    job4=Job(start_time=now, last_update=now, name="checkdups", state="New", wait_for=job2.id, pa_job_state="New", current_file_num=0 )
    session.add(job4)
    session.commit()
    if parent_job:
        AddLogForJob(parent_job, "adding <a href='/job/{}'>job id={} {}</a> (wait for: {})".format( job4.id, job4.id, job4.name, job4.wait_for ) )
    HandleJobs()
    return

def ProcessFileForJob(job, message, current_file):
    job.current_file=os.path.basename(current_file)
    if job.num_files:
        job.current_file_num=job.current_file_num+1
    AddLogForJob(job, message )
    return

def AddLogForJob(job, message):
    now=datetime.now(pytz.utc)
    log=Joblog( job_id=job.id, log=message, log_date=now )
    job.last_update=now
    session.add(log)
    # some logs have DEBUG: in front, so clean that up
    message = message.replace("DEBUG:", "" )
    print( f"DEBUG: {message}" )
    return

def RunJob(job):
#    session = Session()
    job.start_time=datetime.now(pytz.utc)
    if job.name =="scannow":
        JobScanNow(job)
    elif job.name =="forcescan":
        JobForceScan(job)
    elif job.name =="scan_sp":
        JobScanStorageDir(job)
    elif job.name =="importdir":
        JobImportDir(job)
    elif job.name =="getfiledetails":
        JobGetFileDetails(job)
    elif job.name == "checkdups":
        CheckForDups(job)
    elif job.name == "rmdups":
        RemoveDups(job)
    elif job.name == "delete_files":
        JobDeleteFiles(job)
    elif job.name == "move_files":
        JobMoveFiles(job)
    elif job.name == "restore_files":
        JobRestoreFiles(job)
    elif job.name == "processai":
        JobProcessAI(job)
    else:
        print("ERROR: Requested to process unknown job type: {}".format(job.name))
    # okay, we finished a job, so check for any jobs that are dependant on this and run them...
#    session.close()
    if job.pa_job_state != "Completed":
        FinishJob(job, "PA Job Manager - This is a catchall to close of a Job, this should never be seen and implies a job did not actually complete?", "Failed" )
    HandleJobs()
    return

def CancelJob(job,id):
    for j in session.query(Job).filter(Job.wait_for==id).all():
        FinishJob(j, f"Job (#{j.id}) has been withdrawn as the job being waited for #{job.id} failed", "Withdrawn" )
        CancelJob(j, j.id)
    return

def FinishJob(job, last_log, state="Completed", pa_job_state="Completed"):
    job.state=state
    job.pa_job_state=pa_job_state
    job.last_update=datetime.now(pytz.utc)
    AddLogForJob(job, last_log)
    if job.state=="Failed":
        CancelJob(job,job.id)
    session.commit()
    if DEBUG==1:
        print( f"DEBUG: {last_log}" )
    return

def HandleJobs():
    if DEBUG==1:
        print("INFO: PA job manager is scanning for new jobs to process")
    for job in session.query(Job).all():
        if job.pa_job_state == 'New':
            if job.wait_for != None:
                j2 = session.query(Job).get(job.wait_for)
                if not j2:
                    print ("ERROR: job.wait_for ({}) does not exist in below? ".format( job.wait_for ))
                    for j in session.query(Job).all():
                        print ("ERROR:    j={}".format(j.id))
                    continue
                if j2.pa_job_state != 'Completed':
                    continue

            # use this to remove threads for easier debugging, and errors will stacktrace to the console
            if DEBUG==1:
                print("*************************************")
                print("RUNNING job: id={} name={} wait_for={}".format(job.id, job.name, job.wait_for ))
                RunJob(job)
            else:
                try:
                    RunJob(job)
                #    threading.Thread(target=RunJob, args=(job,)).start()
                except Exception as e:
                    try:
                        MessageToFE( job.id, "danger", "Failed with: {} (try job log for details)".format(e) )
                    except Exception as e2:
                        print("ERROR: Failed to let front-end know, but back-end Failed to run job (id: {}, name: {} -- orig exep was: {}, this exception was: {})".format( job.id, job.name, e, e2) )
    print("INFO: PA job manager is waiting for a job")
    return

def JobProgressState( job, state ):
    job.pa_job_state = "In Progress"
    job.state=state
    session.commit()
    return

def JobScanNow(job):
    JobProgressState( job, "In Progress" )
    ProcessImportDirs(job)
    FinishJob( job, "Completed (scan for new files)" )
    MessageToFE( job.id, "success", "Completed (scan for new files)" )
    session.commit()
    return

def JobScanStorageDir(job):
    JobProgressState( job, "In Progress" )
    ProcessStorageDirs(job)
    FinishJob( job, "Completed (scan for new files)" )
    MessageToFE( job.id, "success", "Completed (scan for new files)" )
    session.commit()
    return

def JobForceScan(job):
    JobProgressState( job, "In Progress" )
    session.query(DelFile).delete()
    session.query(FileRefimgLink).delete()
    session.query(EntryDirLink).delete()
    session.query(PathDirLink).delete()
    session.query(Path).delete()
    session.query(Dir).delete()
    session.query(File).delete()
    session.query(Entry).delete()
    session.commit()
    ProcessRecycleBinDir(job)
    ProcessImportDirs(job)
    ProcessStorageDirs(job)
    FinishJob(job, "Completed (forced remove and recreation of all file data)")
    MessageToFE( job.id, "success", "Completed (forced remove and recreation of all file data)" )
    session.commit()
    return

# to serve static content of the images, we create a symlink from inside the static subdir of each import_path that exists
def CreateSymlink(job,ptype,path):
    path_type = session.query(PathType).get(ptype)
    symlink=SymlinkName(path_type.name, path, path)
    if not os.path.exists(symlink):
        print( f"INFO: symlink does not exist, actually creating it -- s={symlink}" )
        os.makedirs( os.path.dirname(symlink), mode=0o777, exist_ok=True )
        os.symlink(path, symlink)
    return symlink

# function to create or return a Path object basedon the path prefix (pp) and the type (the type id of Import, Storage, Bin)
# if the Path is created, it also creates the Dir object (which in turn creates the Entry object)
def AddPath(job, pp, type ):
    path_obj=session.query(Path).filter(Path.path_prefix==pp).first()
    if not path_obj:
        path_obj=Path( path_prefix=pp, num_files=0, type_id=type )
        # if there is no path yet, then there is no Dir for it, so create that too (which creates the entry, etc.)
        # Dir name is os.path.basename(pp), is not in another Dir (None), and its relative path is "", inside the path_obj we just created
        dir=AddDir( job, os.path.basename(pp), None, "", path_obj )
        session.add(path_obj)
        session.add(dir)
    return path_obj


################################################################################################################################################################
#
# Key function that runs as part of (usually) an import job.   The name of the directory (dirname) is checked to see
# if it already is in the database (inside of in_dir in in_path).   If it is,
# just return the db entry.   If not, then we create a new row in Dir, that has name of dirname, has a parent directory
# of in_dir (DB object), has the rel_path set to the relative fs path from the actual fs path to this entry (including the dirname)
# and the in_path set to the overarching path (one of an Import, Storage or Recycle_bin path in the DB)
# 
# e.g.  path on FS: /home/ddp/src/photoassistant/images_to_process/  ... ends in DB as path_prefix="static/Import/images_to_process"
#       and we have a dir in /home/ddp/src/photoassistant/images_to_process/0000/subtest, then we call:
#       AddDir( job, dirname='subtest', in_dir=Dir object for '0000', rel_path='0000/subtest', in_path=Path object for 'static/Import/images_to_process' )
#
################################################################################################################################################################
def AddDir(job, dirname, in_dir, rel_path, in_path ):
    dir=session.query(Dir).join(PathDirLink).join(Path).filter(Path.id==in_path.id).filter(Dir.rel_path==rel_path).first()
    if dir:
        e=session.query(Entry).get(dir.eid)
        e.exists_on_fs=True
        return dir
    dir=Dir( last_import_date=0, rel_path=rel_path, in_path=in_path )
    dtype=session.query(FileType).filter(FileType.name=='Directory').first()
    e=Entry( name=dirname, type=dtype, exists_on_fs=True )
    e.dir_details=dir
    # no in_dir occurs when we Add the actual Dir for the import_path (top of the tree)
    if in_dir:
        e.in_dir=in_dir
    if DEBUG==1:
        AddLogForJob(job, f"DEBUG: Process new dir: {dirname}, rel_path={rel_path}")
    session.add(e)
    return dir

def AddFile(job, fname, type_str, fsize, in_dir, year, month, day, woy  ):
    e=session.query(Entry).join(EntryDirLink).join(Dir).filter(Entry.name==fname,Dir.eid==in_dir.eid).first()
    if e:
        e.exists_on_fs=True
        return e
    ftype = session.query(FileType).filter(FileType.name==type_str).first()
    e=Entry( name=fname, type=ftype, exists_on_fs=True )
    f=File( size_mb=fsize, last_hash_date=0, faces_created_on=0, year=year, month=month, day=day, woy=woy )
    e.file_details = f
    e.in_dir=in_dir
    AddLogForJob(job, "Found new file: {}".format(fname) )
    session.add(e)
    return e

# reset exists_on_fs to False for everything in this import path, if we find it on the FS in the walk below, it goes back to True, anything that
# is still false, has been deleted
def ResetExistsOnFS(job, path):
    reset_dirs = session.query(Entry).join(EntryDirLink).join(Dir).join(PathDirLink).join(Path).filter(Path.path_prefix==path).all()
    for reset_dir in reset_dirs:
        reset_dir.exists_on_fs=False
        session.add(reset_dir)
        reset_files = session.query(Entry).join(EntryDirLink).filter(EntryDirLink.dir_eid==reset_dir.id).all()
        for reset_file in reset_files:
            reset_file.exists_on_fs=False
            session.add(reset_file)
    return

# Convenience function to remove a file from the database - and its associated links
# used when scanning and a file has been removed out from under PA, or
# when we remove duplicates
def RemoveFileFromDB(id):
    session.query(EntryDirLink).filter(EntryDirLink.entry_id==id).delete()
    session.query(File).filter(File.eid==id).delete()
    session.query(Entry).filter(Entry.id==id).delete()
    return

# Actually moves the physical file from its current real directory to a subdir of the recycle bin path
def RemoveFileFromFS( del_me ):
    try:
        settings = session.query(Settings).first()
        dst_dir=settings.recycle_bin_path + '/' + del_me.in_dir.in_path.path_prefix.replace('static/','') + '/' + del_me.in_dir.rel_path + '/'
        os.makedirs( dst_dir,mode=0o777, exist_ok=True )
        src=del_me.FullPathOnFS()
        dst=dst_dir + '/' + del_me.name
        os.replace( src, dst )
    except Exception as e:
        print( f"ERROR: Failed to remove file from filesystem - which={src}, err: {e}")
    return

# Function that restores a file that was deleted (moved into the Bin)
# it moves file on the filesystem back to its original path and then changes the database path from the Bin path
# to the original import or storage path and appropriate dir 
def RestoreFile(job,restore_me):
    try:
        # rel_path for a file in the Bin, is like 'Import/images_to_process/1111', so just prepend static/
        dst_dir='static/' + restore_me.in_dir.rel_path + '/'
        os.makedirs( dst_dir,mode=0o777, exist_ok=True )
        src=restore_me.FullPathOnFS()
        dst=dst_dir + '/' + restore_me.name
        os.replace( src, dst )
    except Exception as e:
        print( f"ERROR: Failed to restores (mv) file on filesystem - which={src} to {dst}, err: {e}")

    # need these for AddDir calls below to work
    orig_file_details = session.query(DelFile).get(restore_me.id)
    orig_path = session.query(Path).filter(Path.path_prefix==orig_file_details.orig_path_prefix).first()
    parent_dir=session.query(Dir).join(PathDirLink).filter(PathDirLink.path_id==orig_path.id).first()

    # in case our new_rel_path is just in the top level of the path, make
    # new_dir = parent_dir so restore_me.in_dir = new_dir after the for loop works 
    new_dir=parent_dir

    # e.g. restore_me's rel_path 'Import/images_to_process/1111', orig_path was 'static/Import/images_to_process', need new rel_path to be just the 1111 bit...
    new_rel_path='static/'+restore_me.in_dir.rel_path
    new_rel_path=new_rel_path.replace(orig_file_details.orig_path_prefix, '')
    if len(new_rel_path) > 0 and new_rel_path[-1] == '/':
        new_rel_path=new_rel_path[0:-1]
    if len(new_rel_path) > 0 and new_rel_path[0] == '/':
        new_rel_path=new_rel_path[1:]

    # path (think Import/Dir1/Dir2) which b/c we have orig_path in AddDir will
    # create static/Import, static/Import/Dir1, static/Import/Dir1/Dir2
    part_rel_path=""
    for dirname in new_rel_path.split("/"):
        part_rel_path += f"{dirname}"
        new_dir=AddDir( job, dirname, parent_dir, part_rel_path, orig_path )
        parent_dir=new_dir
        part_rel_path += "/"
    
    restore_me.in_dir = new_dir
    AddLogForJob(job, f"Restored file: {restore_me.name} to {os.path.dirname(restore_me.FullPathOnFS())}" )
    ### when restoring, an original dir tree might have been removed, so need make it (if needed)
    os.makedirs( os.path.dirname(restore_me.FullPathOnFS()),mode=0o777, exist_ok=True )
    # remove DelFile entry for this restored file
    session.query(DelFile).filter(DelFile.file_eid==restore_me.id).delete()
    session.commit()
    return

# Function that moves a file we are "deleting" to the recycle bin, it moves the
# file on the filesystem and then changes the database path from the import or
# storage path over to the Bin path
def MoveFileToRecycleBin(job,del_me):
    try:
        settings = session.query(Settings).first()
        dst_dir=settings.recycle_bin_path + '/' + del_me.in_dir.in_path.path_prefix.replace('static/','') + '/' + del_me.in_dir.rel_path + '/'
        os.makedirs( dst_dir,mode=0o777, exist_ok=True )
        src=del_me.FullPathOnFS()
        dst=dst_dir + '/' + del_me.name
        os.replace( src, dst )
    except Exception as e:
        print( f"ERROR: Failed to remove file from filesystem - which={src}, err: {e}")

    # need these for AddDir calls below to work
    bin_path=session.query(Path).join(PathType).filter(PathType.name=='Bin').first()
    parent_dir=session.query(Dir).join(PathDirLink).filter(PathDirLink.path_id==bin_path.id).first()

    # if we ever need to restore, lets remember this file's original path
    # (use a string in case the dir/path is ever deleted from FS (and then DB) and we need to recreate)
    del_file_details = DelFile( file_eid=del_me.id, orig_path_prefix=del_me.in_dir.in_path.path_prefix )
    session.add( del_file_details )

    # remove static from rel path, as it will move to static/Bin anyway...
    new_rel_path=del_me.in_dir.in_path.path_prefix.replace('static/','')
    # if there is a relative path on this dir, add it to the new_rel_path as there is only ever 1 Bin path
    if len(del_me.in_dir.rel_path):
        new_rel_path += '/' + del_me.in_dir.rel_path

    # okay, go through new relative path and AddDir any missing subdirs of this
    # path (think Import/Dir1/Dir2) which b/c we have bin_path in AddDir will
    # create Bin/Import, Bin/Import/Dir1, Bin/Import/Dir1/Dir2
    part_rel_path=""
    for dirname in new_rel_path.split("/"):
        part_rel_path += f"{dirname}"
        new_dir=AddDir( job, dirname, parent_dir, part_rel_path, bin_path )
        parent_dir=new_dir
        part_rel_path += "/"
    
    del_me.in_dir = new_dir
    AddLogForJob(job, f"Deleted file: {del_me.name} - (moved to {os.path.dirname(del_me.FullPathOnFS())})" )
    return


# Convenience function to remove a dir from the database - and its associated links
def RemoveDirFromDB(id):
    session.query(EntryDirLink).filter(EntryDirLink.entry_id==id).delete()
    session.query(Dir).filter(Dir.eid==id).delete()
    session.query(Entry).filter(Entry.id==id).delete()
    return

# this routine is used when a scan finds files/dirs that have been removed
# underneath PA, so it just deletes them form the DB
def HandleAnyFSDeletions(job):
    dtype=session.query(FileType).filter(FileType.name=='Directory').first()
    rms = session.query(Entry).filter(Entry.exists_on_fs==False,Entry.type_id!=dtype.id).all()
    rm_cnt=0
    for rm in rms:
        RemoveFileFromDB(rm.id)
        AddLogForJob( job, f"INFO: Removing {rm.name} from system as it is no longer on the file system")
        rm_cnt+=1

    rmdirs = session.query(Entry).filter(Entry.exists_on_fs==False,Entry.type_id==1).order_by(Entry.id.desc()).all()
    for rmdir in rmdirs:
        RemoveFileFromDB(rmdir.id)
        AddLogForJob( job, f"INFO: Removing {rmdir.name} from system as it is no longer on the file system")
        rm_cnt+=1
    return rm_cnt

# try several ways to work out date of file created (try exif, then filename, lastly filesystem)
def GetDateFromFile(file, stat):
    # try exif
    try:
        f = open(file, 'rb')
        tags = exifread.process_file(f)
        date_str, _ = str(tags["EXIF DateTimeOriginal"]).split(" ")
        year, month, day = date_str.split(":")
        year=int(year)
        month=int(month)
        day=int(day)
        check = datetime( year, month, day )
    except:
        # try parsing filename
        try:
            m=re.search( r'(\d{4})(\d{2})(\d{2})', file)
            year=int(m[1])
            month=int(m[2])
            day=int(m[3])
            check2 = datetime( year, month, day )
        # give up and use file sys date
        except:
            year, month, day, _, _, _, _, _, _ = datetime.fromtimestamp(stat.st_ctime).timetuple()
    c=date(year, month, day).isocalendar()
    woy=c[1]
    return year, month, day, woy

def AddJexToDependantJobs(job,name,value):
    for j in session.query(Job).filter(Job.wait_for==job.id).all():
        jex=JobExtra( name=name, value=value )
        j.extra.append(jex)
        AddJexToDependantJobs(j, name, value)
    return

def JobImportDir(job):
    JobProgressState( job, "In Progress" )
    settings = session.query(Settings).first()
    path=[jex.value for jex in job.extra if jex.name == "path"][0]
    path_type=[jex.value for jex in job.extra if jex.name == "path_type"][0]
    AddLogForJob(job, f"Checking {path_type} Directory: {path}" )
    if DEBUG==1:
        print( f"DEBUG: Checking Directory: {path}" )
    if not os.path.exists( path ):
        FinishJob( job, f"Finished Importing: {path} -- Path does not exist", "Failed" )
        return
    symlink=CreateSymlink(job,path_type,path)

    # create/find the Path
    path_obj=AddPath( job, symlink, path_type )
    session.commit()
    # for recycle bin path, we dont want to import content, just create the path/dir vars (above) in the DB
    bin_path=session.query(Path).join(PathType).filter(PathType.name=='Bin').first()
    if bin_path != None and path_type == bin_path.type.id:
        return

    # find all jobs waiting on me and their children, etc. and add a path_prefix jex to symlink, so we can just reference it form here on in, rather than recreate that string
    AddJexToDependantJobs(job,"path_prefix",symlink)
    ResetExistsOnFS(job, symlink)

    # go through data once to work out file_cnt so progress bar works from first import 
    walk=os.walk(path, topdown=True)
    ftree=list(walk)
    overall_file_cnt=0
    for root, subdirs, files in ftree:
        overall_file_cnt+= len(subdirs) + len(files)
    path_obj.num_files=overall_file_cnt

    # this is needed so that later on, when we AddDir for any dirs we find via os.walk, they have a parent dir object that is the dir for the path we are in
    parent_dir=session.query(Dir).join(PathDirLink).join(Path).filter(Path.id==path_obj.id,Dir.rel_path=='').first()

    # first time through we need dir to be the top level, we have a special if below to no recreate the top dir that AddPath created already
    dir=parent_dir
    # session.add in case we already have imported this dir (as AddDir wont) & now we might have diff num of files to last time, 
    session.add(parent_dir)
    
    # if we set / then commit this now, the web page will know how many files
    # to process as we then do the slow job of processing them
    job.num_files=overall_file_cnt
    AddLogForJob(job, f"Found {overall_file_cnt} file(s) to process")
    session.commit()

    # root == path of dir, files are in dir... subdirs are in dir 
    for root, subdirs, files in ftree:
        # already create root above to work out num_files for whole os.walk
        if root != path:
            pp=SymlinkName( path_obj.type.name, path, root )+'/'+os.path.basename(root)
            rel_path=pp.replace(symlink+'/','')
            dir=AddDir(job, os.path.basename(root), parent_dir, rel_path, path_obj)
        for basename in files:
            # commit every 100 files to see progress being made but not hammer the database
            if job.current_file_num % 100 == 0:
                session.commit()
            fname=dir.PathOnFS()+'/'+basename

            stat = os.stat(fname)
            if stat.st_ctime > dir.last_import_date:
                if DEBUG==1:
                    print("DEBUG: {} - {} is newer than {}".format( basename, stat.st_ctime, dir.last_import_date ) )
                if isImage(fname):
                    type_str = 'Image'
                elif isVideo(fname):
                    type_str = 'Video'
                else:
                    type_str = 'Unknown'
                fsize = round(stat.st_size/(1024*1024))

                year, month, day, woy = GetDateFromFile(fname, stat)
                e=AddFile( job, basename, type_str, fsize, dir, year, month, day, woy )
            else:
                if DEBUG==1:
                    print( f"DEBUG: { basename} - {stat.st_ctime} is OLDER than {dir.last_import_date}" )
                e=session.query(Entry).join(EntryDirLink).join(Dir).filter(Entry.name==basename,Dir.eid==dir.eid).first()
                e.exists_on_fs=True
            job.current_file=basename
            job.current_file_num+=1
        job.current_file_num += len(subdirs)
        dir.last_import_date = time.time()
        parent_dir=dir
    job.num_files=overall_file_cnt

    rm_cnt=HandleAnyFSDeletions(job)

    FinishJob(job, f"Finished Importing: {path} - Processed {overall_file_cnt} files, Removed {rm_cnt} file(s)")
    return

def RunFuncOnFilesInPath( job, path, file_func ):
    d = session.query(Dir).join(PathDirLink).join(Path).filter(Path.path_prefix==path).filter(Dir.rel_path=='').first()
    files = session.query(Entry).join(EntryDirLink).filter(EntryDirLink.dir_eid==d.eid).all()
    for e in files:
        ProcessFilesInDir(job, e, file_func)
    return


def JobProcessAI(job):
    path=[jex.value for jex in job.extra if jex.name == "path"][0]
    path_prefix=[jex.value for jex in job.extra if jex.name == "path_prefix"][0]
    path = SymlinkName(path_prefix, path, '/')
    p = session.query(Path).filter(Path.path_prefix==path).first()
    job.num_files=p.num_files

    people = session.query(Person).all()
    for person in people:
        generateKnownEncodings(person)
    
    RunFuncOnFilesInPath( job, path, ProcessAI )

    FinishJob(job, "Finished Processesing AI")
    return

 
def GenHashAndThumb(job, e):
    # commit every 100 files to see progress being made but not hammer the database 
    if job.current_file_num % 100 == 0:
        session.commit()
    stat = os.stat( e.FullPathOnFS() )
    if stat.st_ctime < e.file_details.last_hash_date:
        if DEBUG==1:
            print(f"OPTIM: GenHashAndThumb {e.name} file is older than last hash, skip this")
        job.current_file_num+=1
        return

    e.file_details.hash = md5( job, e.FullPathOnFS() )
    if e.type.name == 'Image':
        e.file_details.thumbnail = GenImageThumbnail( job, e.FullPathOnFS() )
    elif e.type.name == 'Video':
        e.file_details.thumbnail = GenVideoThumbnail( job, e.FullPathOnFS() )
    elif e.type.name == 'Unknown':
        job.current_file_num+=1
    e.file_details.last_hash_date = time.time()
    return

def ProcessAI(job, e):
    if e.type.name != 'Image':
        job.current_file_num+=1
        return

    file = e.FullPathOnFS() 
    stat = os.stat(file)
    # find if file is newer than when we found faces before (fyi: first time faces_created_on == 0)
    if stat.st_ctime > e.file_details.faces_created_on:
        session.add(e)
        im_orig = Image.open(file)
        im = ImageOps.exif_transpose(im_orig)

        faces = generateUnknownEncodings(im)
        e.file_details.faces_created_on=time.time()
        if faces:
            flat_faces = numpy.array(faces)
            e.file_details.faces = flat_faces.tobytes()
        else:
            e.file_details.faces = None
            job.current_file_num+=1
            return
    else:
        if not e.file_details.faces:
            print("OPTIM: This image has no faces, skip it")
            job.current_file_num+=1
            return
        recover=numpy.frombuffer(e.file_details.faces,dtype=numpy.float64)      
        real_recover=numpy.reshape(recover,(-1,128))      
        l=[]
        for el in real_recover:
            l.append(numpy.array(el))
        faces = l
    people = session.query(Person).all()
    for unknown_encoding in faces:
        for person in people:
            lookForPersonInImage(job, person, unknown_encoding, e)
    ProcessFileForJob(job, f"Finished processing {e.name}", e.name )
    return

def lookForPersonInImage(job, person, unknown_encoding, e):
    for refimg in person.refimg:
        # lets see if we have tried this check before
        frl=session.query(FileRefimgLink).filter(FileRefimgLink.file_id==e.id, FileRefimgLink.refimg_id==refimg.id).first()
        if not frl:
            frl = FileRefimgLink(refimg_id=refimg.id, file_id=e.file_details.eid)
        else: 
            stat=os.stat( e.FullPathOnFS() )
            # file & refimg are not newer then we dont need to check
            if frl.matched and stat.st_ctime < frl.when_processed and refimg.created_on < frl.when_processed:
                print(f"OPTIM: lookForPersonInImage: file {e.name} has a previous match for: {refimg.fname}, and the file & refimg  haven't changed")
                return

        session.add(frl)
        frl.matched=False
        frl.when_processed=time.time()
        deserialized_bytes = numpy.frombuffer(refimg.encodings, dtype=numpy.float64)
        results = compareAI(deserialized_bytes, unknown_encoding)
        if results[0]:
            AddLogForJob(job, f'Found a match between: {person.tag} and {e.name}')
            frl.matched=True
            return

def generateUnknownEncodings(im):
    unknown_image = numpy.array(im)
    face_locations = face_recognition.face_locations(unknown_image)
    if not face_locations:
        return None
    unknown_encodings = face_recognition.face_encodings(unknown_image, known_face_locations=face_locations)
    return unknown_encodings


def generateKnownEncodings(person):
    for refimg in person.refimg:
        file = 'reference_images/'+refimg.fname
        stat = os.stat(file)
        if refimg.created_on and stat.st_ctime < refimg.created_on:
            print("OPTIM: skipping re-creating encoding for refimg because file has not changed")
            continue
        img = face_recognition.load_image_file(file)
        location = face_recognition.face_locations(img)
        encodings = face_recognition.face_encodings(img, known_face_locations=location)
        refimg.encodings = encodings[0].tobytes()
        refimg.created_on = time.time()
        session.add(refimg)
    session.commit()

def compareAI(known_encoding, unknown_encoding):
    results = face_recognition.compare_faces([known_encoding], unknown_encoding, tolerance=0.55)
    return results


def ProcessFilesInDir(job, e, file_func):
    if DEBUG==1:
        print( f"DEBUG: ProcessFilesInDir: {e.FullPathOnFS()}")
    if e.type.name != 'Directory':
        file_func(job, e)
    else:
        d=session.query(Dir).filter(Dir.eid==e.id).first()
        job.current_file_num+=1
        files = session.query(Entry).join(EntryDirLink).filter(EntryDirLink.dir_eid==d.eid).all()
        for sub in files:
           ProcessFilesInDir(job, sub, file_func)
    return

def JobGetFileDetails(job):
    JobProgressState( job, "In Progress" )
    path=[jex.value for jex in job.extra if jex.name == "path"][0]
    path_prefix=[jex.value for jex in job.extra if jex.name == "path_prefix"][0]
    if DEBUG==1:
        print("DEBUG: JobGetFileDetails for path={path_prefix}" )
    p=session.query(Path).filter(Path.path_prefix==path_prefix).first()
    job.current_file_num = 0
    job.num_files = p.num_files
    session.commit()
    RunFuncOnFilesInPath( job, path_prefix, GenHashAndThumb )
    FinishJob(job, "File Details job finished")
    session.commit()
    return

def isVideo(file):
    try:
        fileInfo = MediaInfo.parse(file)
        for track in fileInfo.tracks:
            if track.track_type == "Video":
                return True
        return False
    except Exception:
        return False

# Returns an md5 hash of the fnames' contents 
def md5(job, fname):
    hash_md5 = hashlib.md5()
    with open(fname, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
    hash = hash_md5.hexdigest()
    AddLogForJob( job, "Generated md5 hash: {} for file: {}".format( hash, fname ) )
    return hash

def isImage(file):
    try:
        Image.open(file)
        return True
    except:
        return False

def GenImageThumbnail(job, file):
    ProcessFileForJob( job, "Generate Thumbnail from Image file: {}".format( file ), file )
    try:
        im_orig = Image.open(file)
        im = ImageOps.exif_transpose(im_orig)
        bands = im.getbands()
        if 'A' in bands:
            im = im.convert('RGB')
        im.thumbnail((THUMBSIZE,THUMBSIZE))
        img_bytearray = io.BytesIO()
        im.save(img_bytearray, format='JPEG')
        img_bytearray = img_bytearray.getvalue()
        thumbnail = base64.b64encode(img_bytearray)
        thumbnail = str(thumbnail)[2:-1]
    except Exception as e:
        AddLogForJob(job, f"WARNING: No EXIF TAF found for: {file} - error={e}")
        return None
    return thumbnail
    
def GenVideoThumbnail(job, file):
    ProcessFileForJob( job, "Generate Thumbnail from Video file: {}".format( file ), file )
    try:
        vcap = cv2.VideoCapture(file)
        res, frame = vcap.read()
        # if the mean pixel value is > 15, we have something worth making a sshot of (no black frame at start being the sshot)
        while frame.mean() < 15 and res:
            res, frame = vcap.read()
        w = vcap.get(cv2.cv2.CAP_PROP_FRAME_WIDTH)
        h = vcap.get(cv2.cv2.CAP_PROP_FRAME_HEIGHT)
        if w > h:
            factor = w / THUMBSIZE
        else:
            factor = h / THUMBSIZE
        new_h = int(h / factor)
        new_w = int(w / factor)
        frame = cv2.resize(frame, (new_w, new_h), 0, 0, cv2.INTER_LINEAR)
        
        res, thumb_buf = cv2.imencode('.jpeg', frame)
        bt = thumb_buf.tobytes()
        thumbnail = base64.b64encode(bt)
        thumbnail = str(thumbnail)[2:-1]
    except Exception as e:
        AddLogForJob( job, f"ERROR: Failed to Generate thumbnail for video file: {file} - error={e}" )
        return None
    return thumbnail

# utility function to clear any other future Duplicate messages, called if we
# either create a "new" CheckDups (often del/restore related), OR because we
# are actualyl handling the dups now from a front-end click through to
# /removedups, but some other job has since created another dup message...
def ClearOtherDupMessagesAndJobs():
    msgs=session.query(PA_JobManager_FE_Message).join(Job).filter(Job.name=='checkdups')
    for msg in msgs:
        session.query(PA_JobManager_FE_Message).filter(PA_JobManager_FE_Message.id==msg.id).delete()
    cd_jobs=session.query(Job).filter(Job.name=='checkdups').filter(Job.pa_job_state=='New').all()
    for j in cd_jobs:
        FinishJob(j, "New CheckForDups job/removal supercedes this job, withdrawing it", "Withdrawn")
    session.commit()

def CheckForDups(job):
    AddLogForJob( job, f"Check for duplicates" )
    ClearOtherDupMessagesAndJobs()

    res = session.execute( "select count(e1.id) from entry e1, file f1, dir d1, entry_dir_link edl1, path_dir_link pdl1, path p1, entry e2, file f2, dir d2, entry_dir_link edl2, path_dir_link pdl2, path p2 where e1.id = f1.eid and e2.id = f2.eid and d1.eid = edl1.dir_eid and edl1.entry_id = e1.id and edl2.dir_eid = d2.eid and edl2.entry_id = e2.id and p1.type_id != (select id from path_type where name = 'Bin') and  p1.id = pdl1.path_id and pdl1.dir_eid = d1.eid and p2.type_id != (select id from path_type where name = 'Bin') and p2.id = pdl2.path_id and pdl2.dir_eid = d2.eid and f1.hash = f2.hash and e1.id != e2.id and f1.size_mb = f2.size_mb" )
    for row in res:
        if row.count > 0:
            AddLogForJob(job, f"Found duplicates, Creating Status message in front-end for attention")
            MessageToFE( job.id, "danger", f'Found duplicate(s), click&nbsp; <a href="javascript:document.body.innerHTML+=\'<form id=_fm method=POST action=/fix_dups></form>\'; document.getElementById(\'_fm\').submit();">here</a>&nbsp;to finalise import by removing duplicates' )
        else:
            FinishJob(job, f"No duplicates found")
    FinishJob(job, f"Finished looking for duplicates")
    return

def RemoveDups(job):
    AddLogForJob(job, f"INFO: Starting Remove Duplicates job...")
    # as checkdups covers all dups, delete all future dups messages, and Withdraw future checkdups jobs
    ClearOtherDupMessagesAndJobs()

    dup_cnt=0
    for jex in job.extra:
        if 'kfid-' in jex.name:
            _, which = jex.name.split('-')
            hash=[jex.value for jex in job.extra if jex.name == f"kfhash-{which}"][0]
            AddLogForJob(job, f"deleting duplicate files with hash: {hash} but keeping file with DB id={jex.value}" )
            files=session.query(Entry).join(File).filter(File.hash==hash).all()
            keeping=jex.value
            found=None
            del_me_lst = []
            for f in files:
                if os.path.isfile( f.FullPathOnFS() ) == False:
                    AddLogForJob( job, f"ERROR: (per file del) file (DB id: {f.id} - {f.FullPathOnFS()}) does not exist? ignorning file")
                elif f.id == int(keeping):
                    found = f
                else:
                    del_me_lst.append(f)
            if found == None:
                AddLogForJob( job, f"ERROR: (per file dup) Cannot find file with hash={hash} to process - skipping it)" )
            else:
                AddLogForJob(job, f"Keep duplicate file: {found.FullPathOnFS()}" )
                for del_me in del_me_lst:
                    AddLogForJob(job, f"Remove duplicate (per file dup) file: {del_me.FullPathOnFS()}" )
                    MoveFileToRecycleBin(job,del_me)

        if 'kdid-' in jex.name:
            _, which = jex.name.split('-')
            hashes=[jex.value for jex in job.extra if jex.name == f"kdhash-{which}"][0]
            keeping=jex.value
            tmp=session.query(Dir).filter(Dir.eid==keeping).first()
            AddLogForJob(job, f"Keeping files in {tmp.PathOnFS()}" )
            for hash in hashes.split(","):
                files=session.query(Entry).join(File).filter(File.hash==hash).all()
                found=None
                del_me=None
                for f in files:
                    if os.path.isfile(f.FullPathOnFS()) == False:
                        AddLogForJob( job, f"ERROR: (per path del) file (DB id: {f.id} - {f.FullPathOnFS()}) does not exist? ignorning file")
                    if f.in_dir.eid == int(keeping):
                        found=f
                    else:
                        del_me=f

                if found == None:
                    AddLogForJob( job, f"ERROR: (per path dup - dir id={keeping}) Cannot find file with hash={hash} to process - skipping it)" )
                else:
                    AddLogForJob(job, f"Keep duplicate file: {found.FullPathOnFS()}" )
                    AddLogForJob(job, f"Remove duplicate (per path dup) file: {del_me.FullPathOnFS()}" )
                    MoveFileToRecycleBin(job,del_me)
                    dup_cnt += 1

    FinishJob(job, f"Finished removing {dup_cnt} duplicate files" )

    # Need to put another checkdups job in now to force / validate we have no dups
    now=datetime.now(pytz.utc)
    next_job=Job(start_time=now, last_update=now, name="checkdups", state="New", wait_for=None, pa_job_state="New", current_file_num=0 )
    session.add(next_job)
    session.commit()
    AddLogForJob(job, "adding <a href='/job/{}'>job id={} {}</a> to confirm there are no more duplicates".format( next_job.id, next_job.id, next_job.name ) )
    return

def MoveFileToStorage(job, move_me, dst_dir):
    AddLogForJob(job, f"TEST: Moving {move_me.name} to {dst_dir} in storage path" )
    return

def JobMoveFiles(job):
    AddLogForJob(job, f"INFO: Starting Move Files job...")
    AddLogForJob(job, f"INFO: NOT PROCESSING THIS - TESTING...")
    prefix=[jex.value for jex in job.extra if jex.name == "prefix"][0]
    suffix=[jex.value for jex in job.extra if jex.name == "suffix"][0]
    for jex in job.extra:
        if 'eid-' in jex.name:
            move_me=session.query(Entry).join(File).filter(Entry.id==jex.value).first()
            MoveFileToStorage(job,move_me, f"{prefix}{suffix}" )
    now=datetime.now(pytz.utc)
    next_job=Job(start_time=now, last_update=now, name="checkdups", state="New", wait_for=None, pa_job_state="New", current_file_num=0 )
    session.add(next_job)
    MessageToFE( job.id, "success", "Completed (move of selected files)" )
    FinishJob(job, f"Finished move selected file(s)")
    return

def JobDeleteFiles(job):
    AddLogForJob(job, f"INFO: Starting Delete Files job...")
    for jex in job.extra:
        if 'eid-' in jex.name:
            del_me=session.query(Entry).join(File).filter(Entry.id==jex.value).first()
            MoveFileToRecycleBin(job,del_me)
    now=datetime.now(pytz.utc)
    next_job=Job(start_time=now, last_update=now, name="checkdups", state="New", wait_for=None, pa_job_state="New", current_file_num=0 )
    session.add(next_job)
    MessageToFE( job.id, "success", "Completed (delete of selected files)" )
    FinishJob(job, f"Finished deleting selected file(s)")
    return
            
def JobRestoreFiles(job):
    AddLogForJob(job, f"INFO: Starting Restore Files job...")
    for jex in job.extra:
        if 'eid-' in jex.name:
            restore_me=session.query(Entry).join(File).filter(Entry.id==jex.value).first()
            RestoreFile(job,restore_me)
    now=datetime.now(pytz.utc)
    next_job=Job(start_time=now, last_update=now, name="checkdups", state="New", wait_for=None, pa_job_state="New", current_file_num=0 )
    session.add(next_job)
    MessageToFE( job.id, "success", "Completed (restore of selected files)" )
    FinishJob(job, f"Finished restoring selected file(s)")
    return

def InitialValidationChecks():
    settings = session.query(Settings).first()
    rbp_exists=0
    paths = settings.recycle_bin_path.split("#")
    for path in paths:
        if os.path.exists(path):
            rbp_exists=1
            path, dirs, files = next(os.walk(path))
            if len(dirs) + len(files) > 0:
                print("INFO: the bin path contains content, cannot process to know where original deletes were form - skipping content!" )
                print("TODO: could be smart about what is known in the DB vs on the FS, and change below to an ERROR if it is one")
                print("WARNING: IF the files in the bin are in the DB (succeeded from GUI deletes) then this is okay, otherwise you should delete contents form the recycle bin and restart the job manager)" )
            break
    if not rbp_exists:
        print("ERROR: The bin path in settings does not exist - Please fix now");
    sp_exists=0
    paths = settings.storage_path.split("#")
    for path in paths:
        if os.path.exists(path):
            sp_exists=1
            break
    if not sp_exists:
        print("ERROR: None of the storage paths in the settings exist - Please fix now");
    ip_exists=0
    for path in paths:
        if os.path.exists(path):
            ip_exists=1
            break
    if not ip_exists:
        print("ERROR: None of the import paths in the settings exist - Please fix now");
    paths = settings.import_path.split("#")
    if not rbp_exists or not sp_exists or not ip_exists:
        print("ERROR: Exiting until above errors are fixed by paths being created or settings being updated to valid paths" )
        exit(-1)
    return


if __name__ == "__main__":
    print("INFO: PA job manager starting - listening on {}:{}".format( PA_JOB_MANAGER_HOST, PA_JOB_MANAGER_PORT) )

    InitialValidationChecks()
    
    HandleJobs()
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.bind((PA_JOB_MANAGER_HOST, PA_JOB_MANAGER_PORT))
        s.listen()
        while True:
            conn, addr = s.accept()
            HandleJobs()