from dateutil.parser import parse as date_parse
import csv
import re
import sqlite3
noise = re.compile(r' {3,}.*')
def __init_db__(path):
    con = sqlite3.connect(path)
    cur = con.cursor()
    cur.execute('''
        CREATE TABLE IF NOT EXISTS `transactions` (
            `details` STRING,
            `date` STRING,
            `amount` REAL,
            `type` STRING,
            `cOs_num` INTEGER,
            UNIQUE(
            `details`,
            `date`,
            `type`,
            `amount`,
            `cOs_num`));''')
    con.commit()
    return con

class browser:
    def __init__(self,db_path):

        self.db_path = db_path
        self.con = __init_db__(db_path)
        self.con.row_factory = sqlite3.Row
        self.cur = self.con.cursor()

    def update_from_csv(self,csv_file):
        with open(csv_file) as file:
            reader = csv.DictReader(file)
            l = list(reader)
        for line in l:
            date = line.pop('Posting Date')
            cOs = line.pop('Check or Slip #')
            line['date'] = date_parse(date)
            line['Description'] = noise.sub('',line['Description'])
            line['Amount'] = float(line['Amount'])
            line['cOs'] = cOs
        self.cur.executemany('INSERT OR IGNORE INTO `transactions` VALUES (:Description,:date,:Amount,:Type,:cOs);',l)
        self.con.commit()
if __name__ == "__main__":
    b = browser("test.db")
    b.update_from_csv('test.csv')
    res = b.cur.execute('SELECT * FROM transactions WHERE amount>=100;')