require 'dotenv/load'
require 'yaml'
require 'discordrb'


MAX_COINS_PER_DAY = 3
COIN_TIMEOUT = 15
SCOREBOARD = './scoreboard.yml'
coin_state_active = false
coins_offered_today = 0

bot = Discordrb::Bot.new token: ENV['DISCORD_TOKEN']

def get_seconds_to_midnight(time)
  t2 = Time.new(time.year, time.month, time.day + 1)
  return t2 - time
end

def get_random_hours(min, max)
  min_hours = min * 60 * 60
  max_hours = max * 60* 60
  return rand(min_hours..max_hours)
end

def load_scoreboard()
  YAML::load_file(SCOREBOARD) || {}
end

def get_coin_count(scoreboard, user)
  scoreboard[user] || 0
end

def increment_coin(user)
  scoreboard = load_scoreboard()
  coins = get_coin_count(scoreboard, user) + 1
  scoreboard[user] = coins

  File.write(SCOREBOARD, scoreboard.to_yaml)
end

def empty_coin(user)
  scoreboard = load_scoreboard()
  scoreboard[user] = 0

  File.write(SCOREBOARD, scoreboard.to_yaml)
end

def plural(string, count)
  "#{count} #{string}#{count != 1 ? 's' : ''}"
end

bot.message(in: Integer(ENV['BOT_CHANNEL'])) do |event|
  puts event.message
  if event.message.attachments.count { |x| x.filename.scan(/coin*/).length > 0 } > 0
    event.respond "Oh no! Looks like you tried to post a fradulent coin! #{event.author.name}, your coin balance has now been emptied. Let that be a lesson for next time!"
    empty_coin(event.author.id)
  end
end

bot.message(content: 'GET COIN' ) do |event|
  # update score
  if coin_state_active
    increment_coin(event.author.id)

    coin_state_active = false

    coins = get_coin_count(scoreboard, event.author.id)
    event.respond "Nice catch, #{event.author.display_name}! You have #{plural('coin', coins)} now!"
  else
    event.respond "No coins for you, #{event.author.display_name}!"
  end
end

bot.message(with_text: '/coins') do |event|
  coins = get_coin_count(load_scoreboard(), event.author.id)
  event.respond "#{event.author.display_name}, you have #{plural('coin', coins)}!"
end

bot.run(true)

loop do 
  # sleep random amount of time between 1 and 4 hours
  sleep(get_random_hours(1, 4))
  # activate coin state
  coin_state_active = true
  # send coin GIF
  bot.send_file(ENV['BOT_CHANNEL'], File.open('./coin.gif', 'r'))
  coins_offered_today += 1

  # if max coins per day has reached, sleep until midnight
  if coins_offered_today >= MAX_COINS_PER_DAY
    sleep(get_seconds_to_midnight(Time.now))
    coins_offered_today = 0
  end
end

bot.join()