import std/logging, std/strutils
import docopt

import pco_chordspkg/ast, pco_chordspkg/cliconstants, pco_chordspkg/html

when isMainModule:
 try:
  let consoleLogger = newConsoleLogger(
    levelThreshold=lvlInfo,
    fmtStr="pco_chords - $levelname: ",
    useStderr=true)
  logging.addHandler(consoleLogger)

  # Parse arguments
  let args = docopt(USAGE, version = PCO_CHORDSVERSION)

  if args["--debug"]:
    consoleLogger.levelThreshold = lvlDebug

  if args["--echo-args"]: stderr.writeLine($args)

  if args["help"]:
    stderr.writeLine(USAGE & "\n")
    stderr.writeLine(ONLINE_HELP)
    quit()

  let inputText =
    if args["--input"]: readFile($args["--input"])
    else: readAll(stdin)

  let ast = parseChordChart(inputText)
  debug "Parsed AST\p" &
    "-".repeat(16) & "\p" &
    $ast & "\p" &
    "-".repeat(16) & "\p"

  let outputHtml = ast.toHtml()
  if args["--output"]: writeFile($args["--output"], outputHtml)
  else: stdout.write(outputHtml)

 except:
  fatal getCurrentExceptionMsg()
  debug getCurrentException().getStackTrace()
  quit(QuitFailure)