import asyncdispatch, strformat, telebot

const COMMANDS = [
  # command               arguments     description
  [ "daysuntilcongress",  "",           "prints the number of days till congress."      ],
  [ "help",               "[[command]]",  "prints the description of the given command."  ],
  [ "stats",              "",           "print some stats…dunno?"                       ],
  [ "uptime",             "",           "prints the uptime of this bot."                ],
  [ "yesorno",            "",           "helps with decisions."                         ],
]

proc helpCommand* (bot: Telebot, command: Command): Future[bool] {.async.} =
  var answer                            =   ""
  if command.params.len() > 0:
    let command                         =   command.params
    answer                              =   fmt"Could not find Command ›/{command}‹"
    for index                           in  0..( COMMANDS.len()  - 1 ):
      let entry                         =   COMMANDS[ index ]
      if entry[ 0 ] == command:
        let arguments                   =   entry[ 1 ]
        let description                 =   entry[ 2 ]
        answer                          =   fmt"/{command} {arguments}{'\n'}  {description}"
        break
  else:
    answer                              =   "This Bot reacts to messages…\n"
    answer                              &=  "…starting with ›/‹ (see below),\n"
    answer                              &=  "…containing ›penis‹,\n"
    answer                              &=  "…containing ›/s‹ somewhere.\n"
    answer                              &=  "Available Commands:"
    for index                           in  0..( COMMANDS.len()  - 1 ):
      let entry                         =   COMMANDS[ index ]
      let command                       =   entry[ 0 ]
      let arguments                     =   entry[ 1 ]
      let description                   =   entry[ 2 ]
      answer                            &=  fmt"{'\n'}/{command} {arguments} – {description}"

  discard await bot.sendMessage(command.message.chat.id, answer, replyToMessageId = command.message.messageId, parseMode = "markdown")