module SurfaceMaster
  module Orbit
    # Low-level interface to Numark Orbit wireless MIDI control surface.
    class Device < SurfaceMaster::Device
      include MIDICodes

      def initialize(opts = nil)
        @name = "Numark ORBIT"
        super(opts)
        reset!
      end

      def reset!
        # TODO: This... doesn't appear to work.  At all.
        if (result = sysex!(*MAPPINGS)) != 0
          fail "Expected success (0) setting mappings, got: #{result}"
        end
        sysex!(0x01, 0x00, 0x00)
      end

      def read
        super
          .map { |input| decode_input(input) }
          .compact
      end

    protected

      MAPPINGS = [0x03, 0x01, 0x70,
                  0x00, 0x00, 0x00,
                  0x00, 0x04, 0x00,
                  0x00, 0x08, 0x00,
                  0x00, 0x0C, 0x00,
                  0x00, 0x01, 0x00,
                  0x00, 0x05, 0x00,
                  0x00, 0x09, 0x00,
                  0x00, 0x0D, 0x00,
                  0x00, 0x02, 0x00,
                  0x00, 0x06, 0x00,
                  0x00, 0x0A, 0x00,
                  0x00, 0x0E, 0x00,
                  0x00, 0x03, 0x00,
                  0x00, 0x07, 0x00,
                  0x00, 0x0B, 0x00,
                  0x00, 0x0F, 0x00,
                  0x01, 0x00, 0x00,
                  0x01, 0x04, 0x00,
                  0x01, 0x08, 0x00,
                  0x01, 0x0C, 0x00,
                  0x01, 0x01, 0x00,
                  0x01, 0x05, 0x00,
                  0x01, 0x09, 0x00,
                  0x01, 0x0D, 0x00,
                  0x01, 0x02, 0x00,
                  0x01, 0x06, 0x00,
                  0x01, 0x0A, 0x00,
                  0x01, 0x0E, 0x00,
                  0x01, 0x03, 0x00,
                  0x01, 0x07, 0x00,
                  0x01, 0x0B, 0x00,
                  0x01, 0x0F, 0x00,
                  0x02, 0x00, 0x00,
                  0x02, 0x04, 0x00,
                  0x02, 0x08, 0x00,
                  0x02, 0x0C, 0x00,
                  0x02, 0x01, 0x00,
                  0x02, 0x05, 0x00,
                  0x02, 0x09, 0x00,
                  0x02, 0x0D, 0x00,
                  0x02, 0x02, 0x00,
                  0x02, 0x06, 0x00,
                  0x02, 0x0A, 0x00,
                  0x02, 0x0E, 0x00,
                  0x02, 0x03, 0x00,
                  0x02, 0x07, 0x00,
                  0x02, 0x0B, 0x00,
                  0x02, 0x0F, 0x00,
                  0x03, 0x00, 0x00,
                  0x03, 0x04, 0x00,
                  0x03, 0x08, 0x00,
                  0x03, 0x0C, 0x00,
                  0x03, 0x01, 0x00,
                  0x03, 0x05, 0x00,
                  0x03, 0x09, 0x00,
                  0x03, 0x0D, 0x00,
                  0x03, 0x02, 0x00,
                  0x03, 0x06, 0x00,
                  0x03, 0x0A, 0x00,
                  0x03, 0x0E, 0x00,
                  0x03, 0x03, 0x00,
                  0x03, 0x07, 0x00,
                  0x03, 0x0B, 0x00,
                  0x03, 0x0F, 0x00,
                  0x00, 0x00, 0x01,
                  0x00, 0x02, 0x00,
                  0x03, 0x00, 0x00,
                  0x01, 0x01, 0x01,
                  0x02, 0x01, 0x03,
                  0x01, 0x00, 0x02,
                  0x01, 0x02, 0x02,
                  0x02, 0x03, 0x02,
                  0x00, 0x03, 0x01,
                  0x03, 0x02, 0x03,
                  0x03, 0x03, 0x0C,
                  0x00, 0x0D, 0x00,
                  0x0C, 0x00, 0x0D,
                  0x00, 0x0C, 0x00,
                  0x0D, 0x00, 0x0C,
                  0x00, 0x0D, 0x00]

      def sysex_prefix; @sysex_prefix ||= super + [0x00, 0x01, 0x3F, 0x2B]; end

      def decode_shoulder(decoded, note, _velocity)
        decoded[:control].merge!(SurfaceMaster::Orbit::Device::SHOULDERS[note])
        decoded
      end

      def decode_pad(decoded, note, _velocity)
        decoded[:control][:button] = note
        decoded
      end

      def decode_knob(decoded, note, velocity)
        decoded[:control][:bank]  = note + 1
        decoded[:value]           = velocity
        decoded
      end

      def decode_control(decoded, note, velocity)
        tmp         = SurfaceMaster::Orbit::Device::SELECTORS[note]
        tmp[:index] = velocity
        decoded[:control].merge!(tmp)
        decoded
      end

      def enrich_decoded_message(decoded, note, velocity, timestamp)
        case decoded[:type]
        when :shoulder  then decoded = decode_shoulder(decoded, note, velocity)
        when :pad       then decoded = decode_pad(decoded, note, velocity)
        when :knob      then decoded = decode_knob(decoded, note, velocity)
        when :control   then decoded = decode_control(decoded, note, velocity)
        end
        decoded[:timestamp] = timestamp
        decoded
      end

      def decode_input(input)
# puts [input[:code].to_hex, input[:note].to_hex, input[:velocity].to_hex].join(" ")
        note      = input[:note]
        velocity  = input[:velocity]
        code_high = input[:code] & 0xF0
        code_low  = input[:code] & 0x0F
        raw       = SurfaceMaster::Orbit::Device::CONTROLS[code_high]
        raw       = raw[code_low] if raw
        raw       = enrich_decoded_message(raw, note, velocity, input[:timestamp]) if raw
        raw
      end
    end
  end
end