#!/usr/bin/env python3

import argparse, dbtools, dbtools.fillerfilter, requests, setuptools, time, twitools

def downloadMedia(url, tid, mid):
 remote = requests.get(url, stream=True)
 filename = "media/%s_%i.%s" % (str(tid), int(mid), url.split(".")[-1])

 with open(filename, 'wb') as outfile:
  for chunk in remote.iter_content(chunk_size=1024):
   if chunk:
    outfile.write(chunk)
    outfile.flush()

def getTweets(db=dbtools.dbHelper(), user=twitools.twObject().whoami(), two=twitools.twObject()):
 query = "from:" + user
 savepoint = db.getLatestTweet() + 1
 last = savepoint

 timeline = two.search(query, savepoint)

 tw_counter = 0

 for status in timeline:
  timestamp = status.created_at.strftime('%Y-%m-%d %H:%M:%S') + " +0000"
  text = setuptools.unescapeText(status.text)

  if dbtools.fillerfilter.tweetFilter(status):
   try:
    db.executeQuery("INSERT INTO tweets(tweet_id,timestamp,text) VALUES(" + str(status.id) + ",'" + timestamp + "','" + text + "')")
   except:
    print("Failed to insert %s into database." % str(status.id))

   if 'media' in status.entities:
    mid = 0
    for m in status.entities['media']:
     downloadMedia(m['media_url'], status.id, mid)
     mid += 1

   last = status.id
   tw_counter = tw_counter + 1

 db.commit()

 return tw_counter, last, savepoint

def getMessages(db=dbtools.dbHelper(), two=twitools.twObject()):
 mcount = 0
 savepoint = db.getLatestMessage() + 1
 new_messages = two.api.direct_messages(since_id=savepoint, count=200, full_text=True, include_entities=True)
 new_out_messages = two.api.sent_direct_messages(since_id=savepoint, count=200, full_text=True, include_entities=True)

 for m in (new_messages + new_out_messages):
  if dbtools.fillerfilter.messageFilter(m, True):
   try: 
    db.executeQuery("INSERT INTO messages VALUES(%s, '%s', %s, %s, '%s')" % (m.id, setuptools.unescapeText(m.text), m.sender_id, m.recipient_id, m.created_at))
    mcount += 1
   except:
    pass

   if 'media' in m.entities:
    mid = 0
    for med in m.entities['media']:
     downloadMedia(med['media_url'], "m%i" % int(m.id), mid)
     mid += 1

 db.commit()

 return mcount, savepoint or 0, db.getLatestMessage

def getFollowers(db=dbtools.dbHelper(), two=twitools.twObject(), firstrun=False):
 current = list(db.getFollowers())
 new = list(twitools.getFollowerIDs())
 gained = 0
 lost = 0

 if (len(current) == 0 or len(new) == 0) and not firstrun:
  print("Something went wrong.")
  return 0,0

 for follower in new:
  if follower not in current and dbtools.fillerfilter.followerFilter(follower, True):
   db.executeQuery("INSERT INTO followers VALUES('%s', %i, 0)" % (str(follower), int(time.time())))
   db.commit()
   gained += 1

 for follower in current:
  if follower not in new and dbtools.fillerfilter.followerFilter(follower, False):
   db.executeQuery("UPDATE followers SET `until` = %i WHERE `id` = '%s' AND `until` = 0" % (int(time.time()), str(follower)))
   db.commit()
   lost += 1

 return gained, lost

def getFollowing(db=dbtools.dbHelper(), two=twitools.twObject(), firstrun=False):
 current = list(db.getFollowing())
 new = list(twitools.getFollowingIDs())
 gained = 0
 lost = 0

 if (len(current) == 0 or len(new) == 0) and not firstrun:
  print("Something went wrong.")
  return 0,0

 for following in new:
  if following not in current and dbtools.fillerfilter.followingFilter(following, True):
   db.executeQuery("INSERT INTO following VALUES('%s', %i, 0)" % (str(following), int(time.time())))
   db.commit()
   gained += 1

 for following in current:
  if following not in new and dbtools.fillerfilter.followingFilter(following, False):
   db.executeQuery("UPDATE following SET `until` = %i WHERE `id` = '%s' AND `until` = 0" % (int(time.time()), str(following)))
   db.commit()
   lost += 1

 db.commit()

 return gained, lost
  
def getNames(db = dbtools.dbHelper(), two = twitools.twObject()):
 for user in twitools.getNamesByIDs(list(set(list(db.getFollowing()) + list(db.getFollowers())))):
  if not db.matchNameID(user["name"], user["id"]):
   db.executeQuery("UPDATE names SET `until` = %i WHERE `id` = '%s' AND `until` = 0;" % (int(time.time()), str(user["id"])))
   db.executeQuery("INSERT INTO names VALUES('%s', '%s', %i, 0)" % (str(user["id"]), str(user["name"]), int(time.time())))
   db.commit()

if __name__ == "__main__":
 parser = argparse.ArgumentParser()  
 parser.add_argument("-f", "--first", help="first run: ignore empty databases", action="store_true")
 args = parser.parse_args()
 db = dbtools.dbHelper()
 count, last, first = getTweets(db)
 print("Stored %i tweets." % count)
 count, last, first = getMessages(db)
 print("Stored %i messages." % count)
 gained, lost = getFollowers(db, firstrun=args.first)
 print("Gained %i followers, lost %i." % (gained, lost))
 gained, lost = getFollowing(db, firstrun=args.first)
 print("Started following %i, stopped following %i." % (gained, lost))
 getNames(db)
 print("Stored handles of following/followers.")