#! /usr/bin/env python3
# -*- coding: utf-8 -*-

""" Simulates httping for `argos <https://github.com/p-e-w/argos>`"""
# <bitbar.title>httping</bitbar.title>
# <bitbar.version>v1.0</bitbar.version>
# <bitbar.author>Tobias Schmidl</bitbar.author>
# <bitbar.author.github>schtobia</bitbar.author.github>
# <bitbar.desc>Short description of what your plugin does.</bitbar.desc>
# <bitbar.image></bitbar.image>
# <bitbar.dependencies>python,requests</bitbar.dependencies>
# <bitbar.abouturl>https://github.com/schtobia/argos-httping/blob/master/httping.py</bitbar.abouturl>

import sys #for redirecting print to stderr
import datetime #for the whole ms → s and vice versa stuff
import requests #for the central HTTP HEAD request
import statistics #for median and stdev

__author__ = "Tobias Schmidl"
__copyright__ = "Copyright 2018, Tobias Schmidl"
__license__ = "MIT"
__version__ = "0.0.1"
__maintainer__ = "Tobias Schmidl"

max_ping = datetime.timedelta(milliseconds = 1000) # in seconds
targets = ["https://www.google.de", "https://www.bing.com", "https://www.wikipedia.org"]

max_ping_in_ms = max_ping.total_seconds() * 1000
in_bin = lambda x, bin: x >= bin[0] and x <= bin[1]

class Themes:
    # Themes are from http://colorbrewer2.org/
    purple_green = ["#762a83", "#9970ab","#c2a5cf","#a6dba0","#5aae61","#1b7837"]
    red_green = ["#d73027", "#fc8d59","#fee08b","#d9ef8b","#91cf60","#1a9850"]
    original = ["#acacac","#ff0101","#cc673b","#ce8458","#6bbb15","#0ed812"]
    selected_colors = red_green
    generate_bins = lambda min_val, max_val, step_width = 2: [[x, x + step_width - 1] for x in range(min_val, max_val, step_width)]
    bins = generate_bins(0, int(max_ping_in_ms), int(max_ping_in_ms / (len(selected_colors) - 1)))

    def colorize(response_time):
        for index, bin in enumerate(Themes.bins):
            if in_bin(response_time, bin):
                return Themes.selected_colors[len(Themes.selected_colors) - 1 - index]
        return Themes.selected_colors[0]

def httping(targets):
    responses = {}
    for target in targets:
        try:
            responses[target] = requests.head(target, timeout = max_ping.total_seconds()).elapsed.total_seconds() * 1000
        except requests.exceptions.RequestException as ex:
            print(str(ex), file=sys.stderr)
            responses[target] = None
    response_times = [value for key, value in responses.items() if isinstance(value, float)]

    if len(response_times) > 1:
        return responses, statistics.median(response_times), statistics.stdev(response_times)
    elif len(response_times) > 0:
        return responses, response_times[0], 0
    else:
        return responses, None, None

if __name__ == "__main__":
    response_times, median, stddev = httping(targets)
    if isinstance(median, float) and median != max_ping_in_ms:
        print("⦿ " + str(round(median,2)) + "±" + str(round(stddev, 2)) + " | color=" + Themes.colorize(median))
    else:
        print("☠ | color=" + Themes.selected_colors[0]);
    print("---")
    for target, response_time in response_times.items():
        if isinstance(response_time, float):
            print(target + ": " + str(round(response_time, 2)) + " | color=" + Themes.colorize(response_time))
        else:
            print(target + ": ☠ | color=" + Themes.selected_colors[0])