interface.rb

# 0. init the todo
# items = %w{ tomato potato eggs socks }
items = {
  'tomato' => false,
  'potato' => true,
  'eggs' => false
}

def prompt(msg)
  puts msg
  print '> '
  return gets.chomp
end

def handle_add(items)
  item = prompt('enter item to add:')
  items[item] = false
end

def display_items(items)
  p items
  item_with_ids = {}
  index = 1

  items.map do |item, done|
    mark =  done ? 'X' : ' '

    puts "#{index}. [#{mark}] #{item}"

    item_with_ids[index] = item
    index += 1
  end

  return item_with_ids
end

def handle_remove(items)
  item_with_ids = display_items(items)
  p item_with_ids
  item_id = prompt('enter item id to remove:').to_i
  item = item_with_ids[item_id]
  items.delete(item)
end

def handle_mark(items)
  item_with_ids = display_items(items)
  item_id = prompt('enter item id to mark as done:').to_i
  item = item_with_ids[item_id]
  items[item] = true
end

# 1. print welcome
puts "-" * 30
puts "welcome to xmas gift"
puts "-" * 30

loop do
  input = prompt('choose your action[list/add/remove/mark/quit]')

  case input
  when 'list'
    display_items(items)
  when 'add'
    handle_add(items)
  when 'remove'
    handle_remove(items)
  when 'mark'
    handle_mark(items)
  when 'quit'
    exit
  else
    puts "unknown command, try again!"
  end
end

# if input == 'list'
# elsif input == 'add'
# elsif input == 'remove'
# end

# 4. goto 2.