#!/usr/bin/env python3
# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
import json
import matplotlib.pyplot as plt
import os
import sys
from subprocess import Popen, PIPE
from stats import parseData

bar_width = 0.25
index = []
def plot(stdin):
    m_latencies = []
    m_ready = []
    m_turnaround = []
    m_cpu = []
    m_cpuio = []
    idletime = []

    j = json.loads(stdin)
    t = {}
    t["processes"] = j

    m_latencies.append(meanLatency(t))
    m_ready.append(meanReady(t))
    m_turnaround.append(meanTA(t))
    m_cpu.append(meanCPU(t))
    m_cpuio.append(meanCPUIO(t))

    print('M. Latency: ', m_latencies)
    print('M. Ready: ', m_ready)
    print('M. Turnaround: ', m_turnaround)
    print('M. CPU: ', m_cpu)
    print('M. CPU+IO: ', m_cpuio)
    print('Idle: ', idletime)

    m = 0
    for p in t["processes"]:
        m = max(m, p["ultimoTick"])
    
    print('Throughput: ' ,len(t["processes"])/m)

    return


def meanLatency(pl):
    totLatency = sum([ latency(p) for p in pl["processes"]])
    mean = totLatency / len(pl["processes"])
    return mean

def meanTA(pl):
    totTA = sum([ turnaround(p) for p in pl["processes"]])
    mean = totTA / len(pl["processes"])
    return mean

def meanReady(pl):
    totReady = sum([ ready(p) for p in pl["processes"]])
    mean = totReady / len(pl["processes"])
    return mean

def meanCPU(pl):
    totCPU = sum([ cpu(p) for p in pl["processes"]])
    mean = totCPU / len(pl["processes"])
    return mean

def meanCPUIO(pl):
    totCPUIO = sum([ cpu_io(p) for p in pl["processes"]])
    mean = totCPUIO / len(pl["processes"])
    return mean

def latency(p):
    return p["primerTick"]-p["cargaTick"]

def turnaround(p):
    return p["ultimoTick"]-p["primerTick"]

def ready(p):
    return (p["ultimoTick"]-p["primerTick"])-(p["ticksBlock"]+p["ticksCpu"])+(p["primerTick"]-p["cargaTick"])

def cpu(p):
    return p["ticksCpu"]

def cpu_io(p):
    return p["ticksBlock"]+p["ticksCpu"]

def plot_data(ind, data, color, label):
    opacity = 1
    plt.bar([i + bar_width*ind for i in index],
        data,
        bar_width,
        alpha=opacity,
        color=color,
        label=(label))

def main(argv): 
    if len(argv) <= 1:
    	fin = sys.stdin.read()
    else:
        return 1

    plot(fin)
    return 0

if __name__ == "__main__":
    main(sys.argv)