module Fixtures
  DB = {
    artists: [
      { name: 'Blake Mills', genre: 'alternative', release_count: 2 },
      { name: 'Björk', genre: 'electronic', release_count: 3 },
      { name: 'James Blake', genre: 'electronic', release_count: 3 },
      { name: 'Janelle Monae', genre: 'alt-soul', release_count: 2 },
      { name: 'SZA', genre: 'alt-soul', release_count: 1 },
      { name: 'Chris Frank', genre: 'alt-soul', release_count: nil },
    ]
  }

  FILTERS = [
    ->(genre:) {
      select { |item| item[:genre].match(/#{genre}/i) }
    },
    ->(name:) {
      select { |item| item[:name].match(/#{name}/i) }
    },
    ->(releases:) {
      select { |item| item[:release_count].to_i == releases.to_i }
    },
    ->(prolificacy:) {
      range = prolificacy[:min].to_i..prolificacy[:max].to_i
      select { |item| range.include? item[:release_count].to_i }
    },
  ]

  ArtistReducer = Rack::Reducer.new(DB[:artists], *FILTERS)
end