require "alone"
require "csv"
require "al_graph"

class LoggerController < AlController
  FILENAME = "/var/log/logger/data-"

  def action_index()
    AlTemplate.run( 'index.rhtml' )
  end

  def action_view_table()
    filename = FILENAME + Time.now.strftime("%Y%m%d") + ".csv"
    data = CSV.read(filename, :converters=>[:date_time, :float, :float]) rescue []
    @data = data.pop(10)
    AlTemplate.run("view_table.rhtml")
  end

  def action_view_graph()
    @form = AlForm.new(
      AlDate.new("date", :label=>"日付", :value=>Time.now, :required=>true, :tag_type=>"date")
    )

    if @form.validate
      target_date = @form[:date]
    else
      target_date = Time.now
    end

    filename = FILENAME + target_date.strftime("%Y%m%d") + ".csv"
    data = CSV.read(filename, :converters=>[:date_time, :float, :float]) rescue []

    # X軸ラベルを1時間毎で生成する
    labels = []
    24.times {|i| labels[i * 60] = i }

    # 24時間分の気圧・気温データを再構築する
    data_p = Array.new(1440)
    data_t = Array.new(1440)
    data.each {|tm, p, t|
      idx = tm.hour * 60 + tm.minute
      data_p[idx] = p
      data_t[idx] = t
    }

    if !data_p.empty?
      graph = AlGraph.new( 700, 200 )
      line = graph.add_data_line( data_p )
      line.clear_marker()
      graph.y_axis.interval = 2
      graph.y_axis.at_labels[:format] = "%.0f"
      graph.x_axis.interval = 60
      graph.x_axis.labels = labels
      @trend_p = graph.draw_buffer()
    end

    if !data_t.empty?
      graph = AlGraph.new( 700, 200 )
      line = graph.add_data_line( data_t )
      line.clear_marker()
      graph.y_axis.max = 50
      graph.y_axis.min = -10
      graph.y_axis.at_labels[:format] = "%.0f"
      graph.x_axis.interval = 60
      graph.x_axis.labels = labels
      @trend_t = graph.draw_buffer()
    end

    AlTemplate.run("view_graph.rhtml")
  end
end