hrs/fuzz

require_relative "cache"
require_relative "entry"
require_relative "rofi_picker"
require_relative "null_cache"

module Fuzz
  class Selector
    def initialize(items, options = {})
      @cache = options.fetch(:cache, Fuzz::NullCache.new)
      @default = options.fetch(:default, nil)
      @picker = options.fetch(:picker, Fuzz::RofiPicker.new)
      @entries = items.map { |item| make_entry(item, @cache) }
    end

    def pick
      title = picker.pick(titles)
      chosen_entry = find_entry_by_title(title)

      if chosen_entry.nil?
        default
      else
        cache.increment(chosen_entry.title)
        chosen_entry.object
      end
    end

    private

    attr_reader(
      :cache,
      :default,
      :entries,
      :picker,
    )

    def titles
      entries.sort.map(&:title)
    end

    def find_entry_by_title(title)
      entries.detect { |entry| entry.title == title }
    end

    def make_entry(item, cache)
      title = item.to_s

      Fuzz::Entry.new(
        title: title,
        object: item,
        weight: cache.weight(title) || 0,
      )
    end
  end
end