import pandas as pd
import datetime
import csv
import math
import os
import matplotlib.pyplot as plt
from shutil import copyfile

with open("/home/trackingv2/trackingv2.csv", "r") as f:
    reader = csv.reader(f)
    next(reader)
    with open("/home/trackingv2/trackingv2.frac.csv", "w", newline='') as write:
        writer = csv.writer(write)
        writer.writerow(["fraction_nonv2", "datetime"])
        for row in reader:
            per = 0
            if row[1] != "0" and row[2] != "0":
                per = int(row[1]) / int(row[2])
                per = round(per, 4)
            writer.writerow([per, row[3]])

x_axis='datetime'
y_axis='fraction_nonv2'

df = pd.read_csv("/home/trackingv2/trackingv2.frac.csv")
title = "Fraction of HSDirs that are non-v2"
df.plot(kind="line", x=x_axis, y=y_axis, ylim=([0,1]), title=title, grid=True, rot=20, figsize=(6,5))
plt.savefig("/var/www/data/fraction_plot.png")

copyfile("/home/trackingv2/trackingv2.frac.csv", "/var/www/data/fraction_v2.csv")

print("plotted "+title)