#!/bin/bash

#-----------
#
# File: spotify_osx.sh
# Author: Nico.
# Date: june 2012.
# License: GNU GPL.
# Supported OS: Linux (Fedora), OSX
#
#--------------------------
#
# usage: 
#     spotify_osx.sh # 'normal' mode
#     spotify_osx.sh echo # no action
#
#--------------------------

tmp1=/tmp/spotify1.$$
tmp2=/tmp/spotify2.$$
tmp3=/tmp/spotify3.$$
tmp4=/tmp/spotify4.$$
tmps="$tmp1 $tmp2 $tmp3 $tmp4"
trap "rm -f $tmps; echo 'the end'; exit" 0 1 2 3 15
sec=3

tagdb=$HOME/spotDB.txt

#-----------
#
# Mir:ror user config
#
#--------------------------

## RFID tags
cat > $tmp2 << EOF
00000462e6580c00000000000000 learn
000004a2e55b0c00000000000000 lock
000004f27a5f0c00000000000000 playpause
00000432f7620c00000000000000 volUp
000004e27d610c00000000000000 volDown
EOF

## osx only
NODE=/usr/local/bin/node

#----------------------------------------------------
#-- end user config ---------------------------------
#----------------------------------------------------


#-----------
#
# Mir:ror main program
#
#--------------------------

function main()
{
	chmod 777 $tmp4

	cmd="$HOME/hidtest" ## osx 10.5.8
	if [ ! -f "$cmd" ]; then
		cmd="$NODE $tmp4" ## osx 10.6
	fi

	# kill existing instances
	#-------------------------
	pids=$(ps -u$USER -opid -ocommand | grep "$(echo $cmd | sed -e 's;[0-9]*$;;g')" | grep -v grep | awk '{ print $1 }')
	if [ "$pids" != "" ]; then
		kill -INT ${pids}
	fi

	state=none

	# actual loop
	#-------------------------
	while [ 1==1 ]; do
		$cmd | while read line
		do
			NF=$(echo $line | awk '{ print NF }')
			if [ $NF -ne 4 ]; then
				echo "$line"
			fi
			if [ $NF -eq 1 -a "$line" = "again" ]; then
				break
			fi
			if [ "$*" = "echo" ]; then
				echo "$line"
				continue
			fi
			
			echo "$line"

			tag=$(echo $line | awk '{ print $3 }')
			mode=$(echo $line | awk '{ print $4 }')
			command=$(grep $tag $tmp2 | awk '{ print $2 }')

			if [ "$command" = "lock" -a "$mode" = "IN" -a "$state" = "none" ]; then
					state="locked"

			elif [ "$command" = "lock" -a "$mode" = "IN" -a "$state" = "locked" ]; then
					state="none"

			elif [ "$state" = "locked" ]; then
					echo "locked"
					continue

			elif [ "$command" = "volUp" -a "$mode" = "IN" ]; then
					vol=$(osascript -e 'tell application "Spotify" to sound volume')
					vol=$(($vol+10))
					if [ $vol -gt 100 ]; then vol=100; fi
					osascript -e "tell application \"Spotify\" to set sound volume to $vol"

			elif [ "$command" = "volDown" -a "$mode" = "IN" ]; then
					vol=$(osascript -e 'tell application "Spotify" to sound volume')
					vol=$(($vol-10))
					if [ $vol -lt 0 ]; then vol=0; fi
					osascript -e "tell application \"Spotify\" to set sound volume to $vol"

			elif [ "$command" = "learn" -a "$mode" = "IN" ]; then
					state="learn"

			elif [ "$command" = "learn" -a "$mode" = "OUT" ]; then
					state="none"

			elif [ "$command" = "playpause" -a "$mode" = "IN" ]; then
					osascript -e 'tell application "Spotify" to playpause'

			elif [ "$command" = "" -a "$mode" = "IN" -a "$state" = "learn" ]; then
				surl=$(osascript -e 'tell application "Spotify" to id of current track')
				artist=$(osascript -e 'tell application "Spotify" to artist of current track')
				album=$(osascript -e 'tell application "Spotify" to album of current track')
				name=$(osascript -e 'tell application "Spotify" to name of current track')

				grep -v $tag $tagdb 2>/dev/null > $tmp1
				cat $tmp1 > $tagdb

				pstate=$(osascript -e 'tell application "Spotify" to player state')
				pos=0
				if [ "$pstate" = "paused" ]; then
					pos=$(osascript -e 'tell application "Spotify" to player position')
				fi

				echo "$tag $surl $pos ;$name;$album;$artist;" >> $tagdb
				echo "${surl}"
				cat $tagdb

			elif [ "$command" = "" -a "$mode" = "IN" -a "$state" = "none" ]; then
				surl=$(grep $tag $tagdb 2>/dev/null | awk '{ print $2 }' )
				pos=$(grep $tag $tagdb 2>/dev/null | awk '{ print $3 }' )
				grep $tag $tagdb 2>/dev/null
				if [ "$surl" != "" ]; then
					osascript -e "tell application \"Spotify\" to play track \"${surl}\""
				fi
				if [ "$pos" != "" ]; then
					osascript -e "tell application \"Spotify\" to set player position to \"${pos}\""
				fi
			fi

			#echo "tag $tag mode $mode command $command -> state $state"
			#osascript -e 'tell application "Spotify" to player state'
		done
		echo "wait $sec seconds"
		sleep $sec
	done
}

#-----------
#
# Mir:ror node.js loop
#
#--------------------------
cat > $tmp4 << EOF
try {
	var HID = require('HID');

	var devices = new HID.devices(7592, 4865);
	var hid;
	if (!devices.length) {
	  console.log("No mir:ror found");
	} else {
		hid = new HID.HID(devices[0].path);
		hid.write([03, 01]); //Disable sounds and lights
		hid.read(onRead);
	}
} catch (err) {
	console.log("Error:", err)
	console.log("Again")
}

function onRead(error, data) {
  var size;
  var id;

  //get 64 bytes
  if (data[0] != 0) {

    //console.log("\n" + data.map(function (v) {return ('00' + v.toString(16)).slice(-2)}).join(','));

    switch (data[0]) {
    case 1:
      //Orientation change
      switch (data[1]) {
      case 4:
        console.log("-> mir:ror up");
        break;
      case 5:
        console.log("-> mir:ror down");
        break;
      }
      break;
    case 2:
      //RFID
      size = data[4];

      switch (data[1]) {
      case 1:
	    id = (data.splice(0)).splice(2, 14);
        console.log("Tag identified " + id.map(function (v) {return ('00' + v.toString(16)).slice(-2)}).join('') + " IN");
        break;
      case 2:
	    id = (data.splice(0)).splice(2, 14);
    	console.log("Tag identified " + id.map(function (v) {return ('00' + v.toString(16)).slice(-2)}).join('') + " OUT");
        break;
      }

      break;
    }
  }
  hid.read(onRead);
}
EOF



main $*



rm -f $tmps

exit

# read-only
osascript -e 'tell application "Spotify" to player state'                  # stopped,playing,paused
osascript -e 'tell application "Spotify" to current track'                 # The current playing track.
osascript -e 'tell application "Spotify" to artwork of current track'      # Image data in TIFF format.
osascript -e 'tell application "Spotify" to artist of current track'       # The artist of the track. 
osascript -e 'tell application "Spotify" to album of current track'        # The album of the track. 
osascript -e 'tell application "Spotify" to disc number of current track'  # The disc number of the track. 
osascript -e 'tell application "Spotify" to duration of current track'     # The length of the track in seconds. 
osascript -e 'tell application "Spotify" to played count of current track' # The number of times this track has been played. 
osascript -e 'tell application "Spotify" to track number of current track' # The index of the track in its album. 
osascript -e 'tell application "Spotify" to starred of current track'      # Is the track starred? 
osascript -e 'tell application "Spotify" to popularity of current track'   # How popular is this track? 0-100 
osascript -e 'tell application "Spotify" to id of current track'           # The ID of the item. 
osascript -e 'tell application "Spotify" to name of current track'         # The name of the track. 
osascript -e 'tell application "Spotify" to artwork of current track'      # The track s album cover. 
osascript -e 'tell application "Spotify" to album artist of current track' # That album artist of the track. 
osascript -e 'tell application "Spotify" to spotify url of current track'  # The URL of the track. 

# read/write
osascript -e 'tell application "Spotify" to player position'   # The player s position within the currently playing track in seconds. 
osascript -e 'tell application "Spotify" to set player position to 20'
osascript -e 'tell application "Spotify" to repeating enabled' # Is repeating enabled in the current playback context? 
osascript -e 'tell application "Spotify" to set repeating enabled to true'
osascript -e 'tell application "Spotify" to repeating'         # Is repeating on or off? 
osascript -e 'tell application "Spotify" to set repeating to true'
osascript -e 'tell application "Spotify" to shuffling enabled' # Is shuffling enabled in the current playback context? 
osascript -e 'tell application "Spotify" to shuffling'         # Is shuffling on or off? 
osascript -e 'tell application "Spotify" to sound volume'      # The sound output volume (0 = minimum, 100 = maximum) 
osascript -e 'tell application "Spotify" to set sound volume to 50'

# commands
osascript -e 'tell application "Spotify" to next track'
osascript -e 'tell application "Spotify" to previous track'
osascript -e 'tell application "Spotify" to playpause'
osascript -e 'tell application "Spotify" to pause'
osascript -e 'tell application "Spotify" to play'
osascript -e 'tell application "Spotify" to play track "spotify:track:3941McqnrX9blUEelPxgot"'
osascript -e 'tell application "Spotify" to play track "spotify:user:ni_co:playlist:7gsVkVqVPzw2pBDkJVHYYv"'

# read-only
osascript -e 'tell application "Spotify" to name'      # The name of the application.
osascript -e 'tell application "Spotify" to frontmost' # Is this the frontmost (active) application?
osascript -e 'tell application "Spotify" to version'   # The version of the application.


osascript -e 'tell application "Spotify" to quit'