require 'fileutils'

namespace '/video' do

  get '' do
    redirect '/video/list'
  end
  get '/list' do
    videos = Video.reverse(:updated_at).all()
    erb :'video/list', :locals => {
      :title => 'List of videos',
      :videos => videos
    }
  end

  get '/create' do
    # check if there's a channel specified
    selected_channel = false
    if params.has_key?(:channel)
      selected_channel = params[:channel].to_i()
    end

    channels = Channel.all()
    erb :'video/create', :locals => {
      :title => 'Create new video',
      :channels => channels,
      :selected_channel => selected_channel
    }
  end
  post '/create' do
    channel = Channel.where(id: params[:video_channel]).first()
    video_serial = params[:video_serial].to_s.rjust(4, '0')
    video_path = File.join(
      channel.directory_path,
      'Main',
      "##{video_serial} - #{params[:video_name]}"
    )

    video = Video.create(
      serial: params[:video_serial],
      name: params[:video_name],
      channel_id: params[:video_channel],
      directory_path: video_path,
      description: params[:video_description],
      script: "# Introduction\n\n# Body\n\n# Conclusions"
    )

    # create supporting directory structure
    Dir.mkdir(video_path)
    video.ensureDirectoryStructure()

    redirect "/video/#{video.id}"
  end

  get '/:video_id' do
    video = Video.where(id: params[:video_id]).first()
    erb :'video/view', :locals => {
      :title => video.name,
      :video => video
    }
  end

  get '/:video_id/script' do
    video = Video.where(id: params[:video_id]).first()
    erb :'video/script', :locals => {
      :title => "Script: #{video.name}",
      :video => video
    }
  end

  get '/:video_id/edit' do
    video = Video.where(id: params[:video_id]).first()
    channels = Channel.all()
    erb :'video/edit', :locals => {
      :title => "Editing: #{video.name}",
      :video => video,
      :channels => channels
    }
  end
  post '/:video_id/edit' do
    channel = Channel.where(id: params[:video_channel]).first()
    video_serial = params[:video_serial].to_s.rjust(4, '0')
    video_path = File.join(
      channel.directory_path,
      'Main',
      "##{video_serial} - #{params[:video_name]}"
    )

    # find video and temporarily save the old video path
    video = Video.where(id: params[:video_id]).first()
    old_path = video.directory_path

    # edit video attributes
    video.update(
      name: params[:video_name],
      serial: params[:video_serial],
      channel_id: params[:video_channel],
      directory_path: video_path,
      description: params[:video_description]
    )

    # rename the video project directory
    File.rename(old_path, video_path)

    # redirect the user
    redirect "/video/#{video.id}"
  end

  post '/:video_id/edit/:attr' do
    # find video and temporarily save the old video path
    video = Video.where(id: params[:video_id]).first()
    attrToEdit = params[:attr]

    # if we update the video's serial, we need to also update the directory path
    if attrToEdit == 'serial'
      old_path = video.directory_path
      new_path = video.directory_path.sub("##{video.serial}", "##{params[:value]}")
      File.rename(old_path, new_path)
      video[:directory_path] = new_path
    end

    video[attrToEdit.to_sym] = params[:value]
    video.save()

    return "success"
  end

  get '/:video_id/archive' do
    # find the video
    video = Video.where(id: params[:video_id]).first()
    video_base = File.basename(video.directory_path)

    # move project to channel's archive
    archive_dir = File.join(
      video.channel.directory_path,
      'Archive',
      video_base
    )
    FileUtils.mv(video.directory_path, archive_dir)

    # mark the video as archived and update directory
    video.update(
      directory_path: archive_dir,
      archived: true
    )

    redirect '/video/' + video.id.to_s()
  end
  get '/:video_id/unarchive' do
    # find the video
    video = Video.where(id: params[:video_id]).first()
    video_base = File.basename(video.directory_path)

    # move project to channel's archive
    active_dir = File.join(
      video.channel.directory_path,
      'Main',
      video_base
    )
    FileUtils.mv(video.directory_path, active_dir)

    # mark the video as archived and update directory
    video.update(
      directory_path: active_dir,
      archived: false
    )

    redirect '/video/' + video.id.to_s()
  end

  get '/:video_id/edit/script' do
    video = Video.where(id: params[:video_id]).first()
    erb :'video/edit-script', :locals => {
      :title => "Editing script: #{video.name}",
      :video => video
    }
  end
  post '/:video_id/edit/script' do
    # find video and temporarily save the old video path
    video = Video.where(id: params[:video_id]).first()

    # edit video attributes
    video.update(
      script: params[:video_script]
    )

    # redirect the user
    redirect "/video/#{video.id}"
  end

end