class Byebug::CatchCommand

def self.description
  <<-DESCRIPTION
    cat[ch][ (off|<exception>[ off])]
    #{short_description}
    catch                 -- lists catchpoints
    catch off             -- deletes all catchpoints
    catch <exception>     -- enables handling <exception>
    catch <exception> off -- disables handling <exception>
  DESCRIPTION
end

def self.regexp
  /^\s* cat(?:ch)? (?:\s+(\S+))? (?:\s+(off))? \s*$/x
end

def self.short_description
  "Handles exception catchpoints"
end

def add(exception)
  errmsg pr("catch.errors.not_class", class: exception) if warning_eval(exception.is_a?(Class).to_s)
  puts pr("catch.added", exception: exception)
  Byebug.add_catchpoint(exception)
end

def clear
  Byebug.catchpoints.clear if confirm(pr("catch.confirmations.delete_all"))
end

def execute
  return info unless @match[1]
  return @match[1] == "off" ? clear : add(@match[1]) unless @match[2]
  return errmsg pr("catch.errors.off", off: cmd) unless @match[2] == "off"
  remove(@match[1])
end

def info
  if Byebug.catchpoints && !Byebug.catchpoints.empty?
    Byebug.catchpoints.each_key do |exception|
      puts("#{exception}: #{exception.is_a?(Class)}")
    end
  else
    puts "No exceptions set to be caught."
  end
end

def remove(exception)
  return errmsg pr("catch.errors.not_found", exception: exception) unless Byebug.catchpoints.member?(exception)
  puts pr("catch.removed", exception: exception)
  Byebug.catchpoints.delete(exception)
end