import os, strutils
import game


const help = 
  """cup - Probability calculator for the board game CamelUp

Usage: 
  cup [-i] SPACE:STACK [...SPACE:STACK] [DICE]

SPACE refers to a numbered board space (1-16).
STACK refers to a stack of camel colors from bottom to top, e.g. 
      YBR (Yellow, Blue, Red, with Red on top).
DICE refers to the set of dice that have already been rolled,
     e.g. GPR (Green, Purple, Red)

Options:
  -i      Interactive mode (currently unimplemented)
  -h      Show this message and exit
"""

type
  CmdConfig* = object
    state*: seq[tuple[c: Color, p: int]]
    interactive*: bool
    diceRolled*: array[Color, bool]


proc parseColor(c: char): Color =
  case c:
  of 'R', 'r':
    return cRed
  of 'G', 'g':
    return cGreen
  of 'B', 'b':
    return cBlue
  of 'Y', 'y':
    return cYellow
  of 'P', 'p':
    return cPurple
  else:
    raise newException(ValueError, "Invalid camel color specified.")


proc parseArgs*(): CmdConfig =
  for p in os.commandLineParams():
    if p == "-h":
      echo help
      quit 0
    elif p == "-i":
      result.interactive = true
    elif result.state.len < 5:
      let splat = p.split(':')
      
      let sq = splat[0]
      let square = sq.parseInt

      let colors = splat[1]
      for c in colors:
        let color = parseColor(c)
        result.state.add((color, square))
    else:
      for c in p:
        let color = parseColor(c)
        result.diceRolled[color] = true