from load_asset import load
from math import log
notes = load('notes')

#converts from above c0 to frequency in hertz or the inverse
def frequency(n,a = 440,invert = False):
    c = a/(2**(57/12))
    if not invert:
        return (2**(n/12))*c
    else:
        return 12 * log(n/c,2)

#swaps from nn to above c or inverse
##def swap(n,notation):
       
def notename(n,notation):
    note = n%12
    octave = n//12
    if octave > 0:
        return '{}|{}'.format(notes[notation][note],octave)
    else:
        return notes[notation][note]


def above_c(n):
    n = n.upper().split('|')
    if len(n) == 2:
        octave = 12*int(n[1])
    else:
        octave = 0
    note = n[0]
    notation = 'sharps' if note[-1] == '#' else 'flats'
    for i in range(12):
        if notes[notation][i] == note:
            return octave + i
##    if n is int:
##        return notename(n,notation):
##    else: