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#!/usr/bin/env python3
"""
A simple SLO calculator for the command line.
$ slocalc.py 99.99
daily: 0 days, 0 hours, 0 minutes, 8 seconds
weekly: 0 days, 0 hours, 1 minutes, 0 seconds
monthly: 0 days, 0 hours, 4 minutes, 19 seconds
quarterly: 0 days, 0 hours, 12 minutes, 57 seconds
yearly: 0 days, 0 hours, 52 minutes, 33 seconds
"""
from typing import Optional
from datetime import timedelta
import sys
seconds_in_hour = 60 * 60
def convert_to_float(s: str) -> Optional[float]:
try:
return float(s)
except ValueError:
print(f"error: '{s}' cannot be converted to float")
return None
def seconds_to_human_readable(seconds: int) -> str:
delta = timedelta(seconds=seconds)
days = delta.days
hours, remainder = divmod(delta.seconds, 3600)
minutes, seconds = divmod(remainder, 60)
return f"{days} days, {hours} hours, {minutes} minutes, {seconds} seconds"
def cli():
if len(sys.argv) <= 1:
print("you need at least one argument", file=sys.stderr)
sys.exit(1)
uptime = convert_to_float(sys.argv[1])
if uptime is None:
print("failed to read input")
sys.exit(1)
if uptime <= 0:
uptime = 0
if uptime >= 100:
uptime = 100
allowed_downtime = ((100 * 100) - (uptime * 100)) / (100 * 100)
daily_seconds = seconds_in_hour * 24 * allowed_downtime
week_seconds = daily_seconds * 7
month_seconds = daily_seconds * 30
quarter_seconds = daily_seconds * 90
year_seconds = daily_seconds * 365
print("daily: {0}".format(seconds_to_human_readable(daily_seconds)))
print("weekly: {0}".format(seconds_to_human_readable(week_seconds)))
print("monthly: {0}".format(seconds_to_human_readable(month_seconds)))
print("quarterly: {0}".format(seconds_to_human_readable(quarter_seconds)))
print("yearly: {0}".format(seconds_to_human_readable(year_seconds)))
if __name__ == "__main__":
cli()
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