import os
import datetime
import sqlite3

from django.utils.html import escape

from seminar import ovvpfile
from seminar.models import Problem
from seminar.utils import roman, from_roman


# MM_ZADANIA.TYP
typtable={'1': Problem.TYP_ULOHA, '2':Problem.TYP_TEMA, '3':Problem.TYP_SERIAL}

# MM_DOZ.ZARADENIE, MM_AZAD.ZAMERANIE
def dectag(x):
    return ["MFIOTKPZD"[bi] for bi in range(0, 9) if (int(x) & (1 << bi))]

# Datum z formatu "DD.MM.YY"
def transdate(s):
    if '.' not in s: return None
    d,m,r = map(int, s.split('.'))
    return datetime.date(r + 2000 if r < 30 else r + 1900, m, d)

class SQLiteRow(object):
    def __unicode__(self):
        return self.__dict__.__unicode__()
    def __str__(self):
        return self.__dict__.__str__()
    def __repr__(self):
        return self.__dict__.__str__()

# sqlite3 helper
def sqget(db, sql, limit=None):
    c = db.execute(sql)
    rows = c.fetchmany(limit) if limit else c.fetchall()
    res = []
    for row in rows:
        o = SQLiteRow()
        for coli in range(len(c.description)):
            col = c.description[coli]
            o.__setattr__(col[0], row[coli])
        res.append(o)
    return res

## ovvpfile - based import helpers (old)

def read_all_tables(basedir):
    tables = {}
    for fn in os.listdir(basedir):
        if fn.endswith('.csv'):
            print "Reading %s ..." % (fn, )
            with open(os.path.join(basedir, fn), 'r') as f:
                o = ovvpfile.parse(f, with_headers=False)
            tables[fn[:-4]] = o.rows
            print "  %d lines, columns: %s" % (len(o.rows), ' '.join(o.columns), )
    return tables

def matchrows(tab, key, val):
    return [r for r in tab if r[key]==val]

def onerow(tab, key, val):
    t = matchrows(tab, key, val)
    assert(len(t) == 1)
    return t[0]