#!/usr/bin/python3

import os
import errno
import re
from commands.CmdExit import CmdExit
from commands.CmdUpdate import CmdUpdate

DIR = os.path.dirname(os.path.realpath(__file__))

CONFIG = {
    "PipePath": os.path.join(DIR, "../data/cmd-pipe"),
    "CronFragment": os.path.join(DIR, "../data/cron-fragment.txt"),
    "Running": True,
}

# try:
#     os.mkfifo(PIPE)
# except OSError as oe:
#     if oe.errno != errno.EEXIST:
#         raise

def execute(command):
    if command == "EXIT":
        global running
        running = False
    elif command == "UPDATE":
        print("Updating...")
        stream = os.popen('crontab -l')
        crontab = stream.read()
        result = crontab
        begin = re.search("\s*#\s*BEGIN\(ALERTS\).*", crontab)
        if begin:
            result = crontab[:begin.span()[1]] + "\n"

            end = re.search("\s*#\s*END\(ALERTS\).*", crontab)
            if end:
                result += "muahahah\ntest"
                result += crontab[end.span()[0]:]
        
        print(result)
    else:
        print("UNKNOWN COMMAND: {0}".format(command))


def main(config):
    # commandPipe = ''
    # cronFragment = ''
    # try:
    #     opts, args = getopt.getopt(argv,"h",["help","pipe=","cron="])
    # except getopt.GetoptError:
    #     print 'cron-section-replace --pipe <command-pipe> --cron <cron-fragment>'
    #     sys.exit(2)
    # for opt, arg in opts:
    #     if opt in ("-h", "--help"):
    #         print 'cron-section-replace --pipe <command-pipe> --cron <cron-fragment>'
    #         sys.exit()
    #     elif opt in ("--pipe"):
    #         commandPipe = arg
    #     elif opt in ("--cron):
    #         cronFragment = arg
    
    # print(commandPipe)
    # print(cronFragment)
    # sys.exit()

    commands = {
        "EXIT": CmdExit(config),
        "UPDATE": CmdUpdate(config)
    }

    
    while config["Running"]:
        print("Waiting for connection...")
        with open(config["PipePath"]) as pipe:
            print("Connection established")
            while True:
                cmd = pipe.read().strip()
                if len(cmd) == 0:
                    break
                if cmd in commands:
                    commands[cmd].execute()
                else:
                    print("UNKNOWN COMMAND: {0}".format(cmd))
                #execute(data.strip())

if __name__ == "__main__":
   main(CONFIG)