# $language = "Python"
# $interface = "1.0"

# ShowLoggingStatusAndStats.py
#
# Last Modified:
#   30 Mar, 2020:
#     - Initial revision
#
# Description:
#   Displays logging status and stats in the status bar.
#
#   For examples:
#
#     Logging: Off
#
#     Logging: On (1,247,800 lines - 67.70 MB)
#
# Hint: Run from a button bar; OK. Better if it's run
#       as a Logon Script as configured in the Logon
#       Actions section of Session Options for your
#       saved session.

import os

crt.Screen.Synchronous = False

def main():
    # refresh status every 1000 milliseconds
    nRefreshRateMs = 1000

    strLastLoggingStatus = ""
    strCurLogStatus = ""

    try:
        while True:
            #check current status
            if crt.Session.Connected:
                if crt.Session.Logging:
                    if strLastLoggingStatus <> "on":
                        strLastLoggingStatus = "on"

                    strLogFilePath = crt.Session.LogFileName
                    nLines = 0
                    for strLine in open(strLogFilePath, 'r'):
                        nLines += 1
                    objStats = os.stat(strLogFilePath)
                    nBytes = objStats.st_size
                    if nBytes <= 1023:
                        strBytes = "{} B".format(nBytes)
                    elif nBytes <= 1048575:
                        strBytes = "{0:.2f} KB".format(nBytes/1024.00)
                    else:
                        strBytes = "{0:.2f} MB".format(nBytes/1024.00/1024.00)

                    strCurLogStatus = "Logging: On ({:,} lines - {})".format(
                        nLines, strBytes)

                else:
                    if strLastLoggingStatus <> "off":
                        strCurLogStatus = "Logging: Off"
                        strLastLoggingStatus = "off"
            else:
                if strCurLogStatus <> "":
                    crt.Session.SetStatusText("")

            #update the status
            crt.Session.SetStatusText(strCurLogStatus)

            crt.Sleep(nRefreshRateMs)
    except Exception as objInst:
        crt.Session.SetStatusText(
            "Script failure: {}".format(str(objInst)))
        return

main()