# Created with Python 2.7

# Reads in from source and creates a file at destination
source_file = "measurements.csv"
destination_file = "converted_measurements.csv"
height = 1.83  # in meters

def write_file(lines):
    with open(destination_file, "w") as output:
        for line in lines:
            output.write(line + "\n")


def bmi_calc(weight):
    bmi = round(weight / (height * height), 2)
    return bmi


def date_flip(run_date):
    # From 2017-04-08 00:00:00 to 08-04-2017
    a = run_date.split(" ")
    b = a[0].split("-")
    return "{0}-{1}-{2}".format(b[2], b[1], b[0])


def filter_lines(runkeeper_data):
    array = []
    for line in runkeeper_data:
        points = line.split(",")
        # has other things as well
        if points[1] == 'weight':
            array.append(convert_line(points))
    return array


def convert_line(runkeeper_points):
    measurement_date = date_flip(runkeeper_points[0])
    weight = float(runkeeper_points[2])
    bmi = bmi_calc(weight)
    fitbit_line = "\"{0}\",\"{1}\",\"{2}\",\"{3}\"".format(measurement_date, int(round(weight)), bmi, 0)
    return fitbit_line

runkeeper_data = []

with open(source_file) as f:
    for line in f:
        runkeeper_data.append(line)

header = """Body
Date,Weight,BMI,Fat"""

lines = [header] + filter_lines(runkeeper_data)

write_file(lines)