#!/usr/bin/env python3

import sys, json, os, argparse

#### Signal must be handled to use pipe the command line (e.g: ./.clusterman.py node-pi-1 1712660604 1712660705|head)
from signal import signal, SIGPIPE, SIG_DFL
signal(SIGPIPE,SIG_DFL) 

#### Parse arguments
parser = argparse.ArgumentParser(description="Script to collect power measurements")
parser.add_argument('key', help='Key to use e.g: hostname')
parser.add_argument('start', help='Starting timestamp')
parser.add_argument('end', help='Ending timestamp')
parser.add_argument('-u', '--unique', help="Do not report duplication power measurements", action="store_true")
args=parser.parse_args()

#### Loading arguments
key=args.key
startTime=int(args.start)
endTime=int(args.end)
unique=args.unique

#### Init various constancs
LOG_INTERVAL=20
POWER_PATH="/home/loic/power/"
MAP_FILE="/home/loic/map.json"
# Getting measuremnts location according to key
with open(MAP_FILE) as f:
    global MAP
    MAP = json.load(f)
MEASUREMENTS_LOCATION=os.path.join(POWER_PATH,MAP[key])
START_INTERVAL=startTime-(startTime%LOG_INTERVAL)
END_INTERVAL=endTime-(endTime%LOG_INTERVAL)

#### Init various variables
showHeader=True
interval=START_INTERVAL
lastPower="" # Store last read measurement
finalLinePrinted=False
finalLine=""
# Start reporting
while True:
    # Open the correct measurement file
    path=os.path.join(MEASUREMENTS_LOCATION,str(interval))
    theFile = open(path, 'r')

    # Start reading lines in the file
    linum=0
    while True:
        line = theFile.readline()
        if not line:
            break
        linum+=1
        line=line.strip() # Remove newline char at the end
        if linum <= 1 and showHeader:
            print(line)
            showHeader=False
        elif linum > 1:
            if unique:
                split=line.split(",")
                if lastPower != "" and split[2] != lastPower:
                    print(line)
                finalLine=line
                lastPower=split[2]
            else:
                print(line)
    theFile.close()

    # Update interval
    if interval >= END_INTERVAL:
        break
    interval+=LOG_INTERVAL

#### Check if last power measurement need to be explicitely printed
if unique and not finalLinePrinted:
    print(finalLine)