class Travis::CLI::Cache

def caches
  @caches ||= drop? ? repository.delete_caches(params) : repository.caches(params)
end

def check_caches
  return if caches.any?
  say 'no caches found'
  exit
end

def description
  description = color('all caches', :important)
  description << " on branch #{color(branch, :important)}" if branch?
  description << " that match #{color(match, :important)}" if match?
  description
end

def display_branch(name, list)
  say color(name ? "On branch #{name}:" : 'Global:', :important)
  list.each { |c| display_cache(c) }
  puts
end

def display_cache(cache)
  say [
    color(cache.slug.ljust(space), :bold),
    'last modified: ' << formatter.time(cache.last_modified),
    'size: ' << formatter.file_size(cache.size)
  ].join('  ') << "\n"
end

def drop?
  return false unless delete?
  return true if force?
  error 'not deleting caches without --force' unless interactive?
  error 'aborted' unless danger_zone? "Do you really want to delete #{description}?"
  true
end

def params
  params = {}
  params[:branch] = branch if branch?
  params[:match]  = match  if match?
  params
end

def run
  error "not allowed to access caches for #{color(repository.slug, :bold)}" unless repository.push?
  branches = caches.group_by(&:branch)
  check_caches
  warn "Deleted the following caches:\n" if delete?
  branches.each { |name, list| display_branch(name, list) }
  size = caches.inject(0) { |s, c| s + c.size }
  say 'Overall size of above caches: ' << formatter.file_size(size)
end

def space
  @space ||= caches.map(&:slug).map(&:size).max
end