class VideosController < ApplicationController
  before_action :set_video, only: [:show, :stream, :playback_position, :retry_processing]

  def show
    @work = @video.work
    @last_position = get_last_playback_position
  end

  def stream
    file_path = @video.web_stream_path

    unless file_path && File.exist?(file_path)
      head :not_found
      return
    end

    send_file file_path,
              filename: @video.filename,
              type: 'video/mp4',
              disposition: 'inline',
              stream: true,
              buffer_size: 4096
  end

  def playback_position
    position = params[:position].to_i
    session = get_or_create_playback_session
    session.update!(position: position, last_played_at: Time.current)
    head :ok
  end

  def retry_processing
    VideoProcessorJob.perform_later(@video.id)
    redirect_to @video, notice: 'Video processing has been queued.'
  end

  private

  def set_video
    @video = Video.find(params[:id])
  end

  def get_last_playback_position
    # Get from current user's session or cookie
    session_key = "video_position_#{@video.id}"
    session[session_key] || 0
  end

  def get_or_create_playback_session
    # For Phase 1, we'll use a simple session-based approach
    # Phase 2 will use proper user authentication
    PlaybackSession.find_or_initialize_by(
      video: @video,
      session_id: session.id.to_s,
      user_id: nil  # Will be populated in Phase 2
    )
  end
end