"""
Plot doubling time
"""
import matplotlib.pyplot as pp
import numpy as np
name="doubling_time"

def moving_average(x, w):
    return np.convolve(x, np.ones(w), 'valid') / w

def plot(data, countries, pop):
    figsize = (10,5)
    for loc in data:
        if loc not in countries:
            continue
        time, new_cases, new_deaths, total_cases, total_deaths = data[loc]
        
        pp.figure(name, figsize=figsize)
        window_size = 3
        tchar = moving_average(np.array(new_cases),window_size)/moving_average(np.array(total_cases),window_size)
        thalf = np.log(2)/tchar
        day_of_100_cases = np.argwhere(np.array(total_cases) > 99)[0][0]
        new_time_axis = time[int(window_size/2):-int(window_size/2)]
        pp.plot(new_time_axis[50:], thalf[50:], label=f"{loc}", marker=".")

    pp.yscale("log")
    pp.ylabel("doubling time [days]")
    #pp.xlabel("daye reported ten cases")
    #pp.xticks(rotation=45)
    pp.legend(frameon=False)
    pp.grid(which="both", axis="y")
    pp.tight_layout()

    pp.savefig(name+".png")