module Byebug::Helpers::ThreadHelper

def context_from_thread(thnum)
  ctx = Byebug.contexts.find { |c| c.thnum.to_s == thnum }
  err = case
        when ctx.nil? then pr('thread.errors.no_thread')
        when ctx == context then pr('thread.errors.current_thread')
        when ctx.ignored? then pr('thread.errors.ignored', arg: thnum)
        end
  [ctx, err]
end

def current_thread?(ctx)
  ctx.thread == Thread.current
end

def debug_flag(ctx)
  ctx.ignored? ? '!' : ' '
end

def display_context(ctx)
  puts pr('thread.context', thread_arguments(ctx))
end

def location(ctx)
  return context.location if ctx == Byebug.current_context
  backtrace = ctx.thread.backtrace_locations
  return '' unless backtrace && backtrace[0]
  "#{backtrace[0].path}:#{backtrace[0].lineno}"
end

def status_flag(ctx)
  return '$' if ctx.suspended?
  current_thread?(ctx) ? '+' : ' '
end

def thread_arguments(ctx)
  {
    status_flag: status_flag(ctx),
    debug_flag: debug_flag(ctx),
    id: ctx.thnum,
    thread: ctx.thread.inspect,
    file_line: location(ctx),
    pid: Process.pid,
    status: ctx.thread.status,
    current: current_thread?(ctx)
  }
end