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<<-DOC
Here is a sample configuration.
Puts your configuration to config/plugins/ambient.yml

channels:
  - channel_id: 12345
    write_key: your_write_key
    trigger:
      device: M100
      type: raise_and_fall
      value_type: bool
    devices:
      d1:
        device: D30
        value_type: value
      d2:
        device: D17
        value_type: value
      d3:
        device: D11
        value_type: value
      d4:
        device: D22
        value_type: value
      d5:
        device: D25
        value_type: value
  - channel_id: 12345
    write_key: your_write_key
      type: interval
      interval: 60
    devices:
      d1:
        device: D30
        value_type: value
      d2:
        device: D17
        value_type: value
      d3:
        device: D11
        value_type: value
      d4:
        device: D22
        value_type: value
      d5:
        device: D25
        value_type: value
DOC

require 'ambient_iot'


module LadderDrive
module Emulator

class AmbientPlugin < Plugin

  def initialize plc
    super #plc
    return if disabled?

    @values = {}
    @times = {}
    @worker_queue = Queue.new

    setup
  end

  def run_cycle plc
    return if disabled?
    return unless config[:channels]

    config[:channels].each do |channel|
      channel = channel
      next unless channel[:channel_id]
      next unless channel[:write_key]
      begin

        interval_triggered = false
        now = Time.now
        triggered = false
        v = nil
        case channel[:trigger][:type]
        when "interval"
          t = @times[channel.object_id] || now
          triggered = t <= now
          if triggered
            interval_triggered = true
            t += channel[:trigger][:interval] || 300
            @times[channel.object_id] = t
          end
        else
          device = plc.device_by_name channel[:trigger][:device]
          v = device.send channel[:trigger][:value_type]
          unless @values[device.name] == v
            @values[device.name] = v
            case channel[:trigger][:type]
            when "raise"
              triggered = !!v
            when "fall"
              triggered = !v
            else
              triggered = true
            end
          end
        end

        next unless triggered || interval_triggered

        # gether values
        values = channel[:devices].inject({}) do |h, pair|
          d = plc.device_by_name pair.last[:device]
          v = d.send pair.last[:value_type], pair.last[:text_length] || 8
          h[pair.first] = v
          h
        end

        @worker_queue.push channel:channel, values:values
      rescue => e
        p e
      end
    end
  end

  private

    def setup
      Thread.start {
        thread_proc
      }
    end

    def thread_proc
      @uploaded_at = nil

      while arg = @worker_queue.pop
        begin
          now = Time.now
          # ignore a request if it's requested in a 5 sec from previous request.
          next unless @uploaded_at.nil? || (now - @uploaded_at >= 5)

          channel = arg[:channel]
          client = AmbientIot::Client.new channel[:channel_id], write_key:channel[:write_key]
          client << arg[:values]
          client.sync
          @uploaded_at = now
        rescue => e
          p e
        end
      end
    end

end

end
end


def plugin_ambient_init plc
  @ambient_plugin = LadderDrive::Emulator::AmbientPlugin.new plc
end

def plugin_ambient_exec plc
  @ambient_plugin.run_cycle plc
end