module Streams
  module Overlay
    module_function

    def overlay_dir(session_id)
      Rails.root.join("tmp/stream_overlays", session_id.to_s)
    end

    def overlay_png_path(session)
      overlay_dir(session.id).join("overlay.png")
    end

    def overlay_pipe_path(session)
      overlay_dir(session.id).join("overlay.pipe")
    end

    # Logo chiaro watermark (brand/logo-white-m.png → branding/ in deploy).
    def brand_logo_path
      candidates = [
        Rails.root.join("branding/logo-white-m.png"),
        Rails.root.join("brand/logo-white-m.png"),
        Rails.root.join("public/logo-white.png"),
        Rails.root.join("public/logo.png")
      ]
      candidates.find(&:file?) || candidates.first
    end

    def badge_away_color(team)
      club = team.club
      candidate = club&.effective_secondary_color.presence || "#1565c0"
      return candidate unless light_hex_color?(candidate)

      "#1565c0"
    end

    def light_hex_color?(hex)
      h = hex.to_s.delete_prefix("#")
      return false unless h.match?(/\A\h{6}\z/i)

      r = h[0..1].to_i(16)
      g = h[2..3].to_i(16)
      b = h[4..5].to_i(16)
      (0.299 * r + 0.587 * g + 0.114 * b) > 200
    end
  end
end