# -*- coding: utf-8 -*-
import sqlite3
import fpdb_db
import math

# Should probably use our wrapper classes - creating sqlite db in memory
sqlite3.register_converter("bool", lambda x: bool(int(x)))
sqlite3.register_adapter(bool, lambda x: "1" if x else "0")

con = sqlite3.connect(":memory:")
con.isolation_level = None

#Floor function
con.create_function("floor", 1, math.floor)

#Mod function
tmp = fpdb_db.sqlitemath()
con.create_function("mod", 2, tmp.mod)

# Aggregate function VARIANCE()
con.create_aggregate("variance", 1, fpdb_db.VARIANCE)


cur = con.cursor()

def testSQLiteVarianceFunction():
    cur.execute("CREATE TABLE test(i)")
    cur.execute("INSERT INTO test(i) values (1)")
    cur.execute("INSERT INTO test(i) values (2)")
    cur.execute("INSERT INTO test(i) values (3)")
    cur.execute("SELECT variance(i) from test")
    result = cur.fetchone()[0]

    print "DEBUG: Testing variance function"
    print "DEBUG: result: %s expecting: 0.666666 (result-expecting ~= 0.0): %s" % (result, (result - 0.66666))
    cur.execute("DROP TABLE test")
    assert (result - 0.66666) <= 0.0001

def testSQLiteFloorFunction():
    vars    = [0.1, 1.5, 2.6, 3.5, 4.9]
    cur.execute("CREATE TABLE test(i float)")
    for var in vars:
        cur.execute("INSERT INTO test(i) values(%f)" % var)
    cur.execute("SELECT floor(i) from test")
    result = cur.fetchall()
    print "DEBUG: result: %s" % result
    answer = 0
    for i in result:
        print "DEBUG: int(var): %s" % int(i[0])
        assert answer == int(i[0])
        answer = answer + 1