import sys
import os

sys.path.insert(1, os.path.join(sys.path[0], '..'))

from parser import createLineData, parseLine

def next():
  # For blank lines, readline will return a newline.
  # For no result, readline will return a string of length 0.
  line = sys.stdin.readline()
  # Since we strip trailing newlines resulting in an empty string for empty lines,
  # return None if there actually is no result.
  return line.rstrip('\n') if len(line) > 0 else None

def linedata_basic (indent):
  lineData = createLineData(indent)

  while (line := next()) != None:
    parseLine(line, lineData)
    print("| level {level} | indent {indent} | offsetHead {offsetHead} | offsetTail {offsetTail} | line {line} |".format(
      level = lineData['level'], indent = lineData['indent'], offsetHead = lineData['offsetHead'], offsetTail = lineData['offsetTail'], line = line
    ))

def linedata_head_tail ():
  lineData = createLineData()

  while (line := next()) != None:
    parseLine(line, lineData)
    head = line[lineData['offsetHead']:lineData['offsetTail']] if len(line) > lineData['offsetHead'] else ''
    tail = line[lineData['offsetTail'] + 1:] if len(line) > lineData['offsetTail'] + 1 else ''

    print("| head {head} | tail {tail} |".format(
      head = head, tail = tail
    ))

def main():
  testName = sys.argv[1]

  if testName == 'linedata:basic': linedata_basic(' ')
  if testName == 'linedata:tabs': linedata_basic('\t')
  if testName == 'linedata:head-tail': linedata_head_tail()

if __name__ == "__main__":
  main()