import sqlite3
import json
from datetime import datetime

timeframe = '2015-05'
sql_transaction = []
#creates data base and names it the value in timeframe variable
connection = sqlite3.connect('{}.db'.format(timeframe))
c = connection.cursor()

def create_table():
    #creates a table if one does not exist and names it parent reply
    c.execute("""CREATE TABLE IF NOT EXISTS parent_reply
(parent_id TEXT PRIMARY KEY, comment_id TEXT UNIQUE, parent TEXT, comment TEXT,
subreddit TEXT, unix INT, score INT)""")

def format_data(data):
    data=data.replace("\n"," newlinechar ").replace("\r"," newlinechar ").replace('"',"'")
    return data

def find_parent(pid):
    try:
        sql = "SLECT comment FROM parent_reply WHERE comment_id = '{}' LIMIT 1".format(pid)
        c.execute(sql)
        result = c.fetchone()
        if result != None:
            return result[0]
        else: return False
    except Exception as e:
        print("find_parent", e)
        return False

def find_existing_score(pid):
    try:
        sql = "SLECT score FROM parent_reply WHERE parent_id = '{}' LIMIT 1".format(pid)
        c.execute(sql)
        result = c.fetchone()
        if result != None:
            return result[0]
        else: return False
    except Exception as e:
        print("find_parent", e)
        return False

def acceptable(data):
    if len(data.split(' ')) > 50 or len(data) < 1:
        return False
    elif len(data) > 1000:
        return False
    elif data == '[deleted]' or data == '[removed]':
        return False
    else:
        return True

def sql_insert_replace_comment(commentid,parentid,parent,comment,subreddit,time,score):
    try:
        sql = """UPDATE parent_reply SET parent_id = ?, comment_id = ?, parent = ?, comment = ?, subreddit = ?, unix = ?, score = ? WHERE parent_id =?;""".format(parentid, commentid, parent, comment, subreddit, int(time), score, parentid)
        transaction_bldr(sql)
    except Exception as e:
        print('s-UPDATE insertion',str(e))
def sql_insert_has_parent(commentid,parentid,parent,comment,subreddit,time,score):
    try:
        sql = """INSERT INTO parent_reply (parent_id, comment_id, parent, comment, subreddit, unix, score) VALUES ("{}","{}","{}","{}","{}",{},{});""".format(parentid, commentid, parent, comment, subreddit, int(time), score)
        transaction_bldr(sql)
    except Exception as e:
        print('s-PARENT insertion',str(e))


def sql_insert_no_parent(commentid,parentid,comment,subreddit,time,score):
    try:
        sql = """INSERT INTO parent_reply (parent_id, comment_id, comment, subreddit, unix, score) VALUES ("{}","{}","{}","{}",{},{});""".format(parentid, commentid, comment, subreddit, int(time), score)
        transaction_bldr(sql)
    except Exception as e:
        print('s-NO_PARENT insertion',str(e))

def transaction_bldr(sql):
    global sql_transaction
    sql_transaction.append(sql)
    if len(sql_transaction) > 1000:
        c.execute('BEGIN TRANSACTION')
        for s in sql_transaction:
            try:
                c.execute(s)
            except:
                pass
        connection.commit()
        sql_transaction = []


if __name__=="__main__":
    create_table()
    row_counter = 0
    paired_rows = 0

    with open("F:/Nebula0.0.5/chatdata/reddit_data/{}/RC_{}".format(timeframe.split('-')[0]), timeframe, buffering=1000) as f:
              for row in f:
                  print(row)
                  row_counter += 1
                  row = json.loads(row)
                  parent_id = row['parent_id']
                #this function will clean up data
                  body = format_data(row['body'])
                  created_utc = row['created_utc']
                  score = row['score']
                  subreddit = row['subreddit']
                  parent_data = find_parent(parent_id)


                  if score >= 5:
                      if acceptable(body):
                          existing_comment_score = find_existing_score(parent_id)
                          if existing_comment_score:
                              if score > existing_comment_score:
                                  sql_insert_replace_comment(comment_id, parent_id, parent_data, body, subreddit, created_utc, score)
                          else:
                              if parent_data:
                                  sql_inser_has_parent(comment_id, parent_id, parent_data, body, subreddit, created_utc, score)
                                  paired_rows+=1
                              else:
                                  sql_insert_no_parent(comment_id, parent_id, body, subreddit, created_utc, score)
                  if row_counter % 100000 == 0:
                      print('Total Rows Read: {}, Paired Rows: {}, Time: {}'.format(row_counter, paired_rows, str(datetime.now()))