# Musiclog - Post current / next song titles of some radio stations
# to a particular IRC Channel.

# Copyright (C) 2014  ManiacTwister < twister@s7t.de >

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

package require http
package require json
package require tdom

set lastsong_886 ""
set lastsong_oe3 ""
set lastsong_wdr2 ""
set lastsong_gotv ""

set standalone false

proc bgerror {s} {
    puthelp "PRIVMSG #musiclog :An error occured: $s"
}

proc sleep {N} {
   after [expr {int($N * 1000)}]
}


# Enable timer
proc enable {} {
  global standalone
  if {!$standalone} {
    timer 1 run
  } else {
    sleep 5
    run
  }
}

# Execution loop
proc run {} {
  886check
  oe3check
  wdr2check
  gotvcheck
  enable
}

proc 886check {} {
  global lastsong_886
  set url [http::geturl http://www.radio886.at/cache/r886_joa.js]

  if {[http::status $url] == "ok"} {
    set data [string map {"window.r886_joa = " ""} [http::data $url]]
    set dict [json::json2dict $data]

    if {[dict exists $dict "next"]} {
      set next [saveGet $dict "next"]
      set currentsong [string trim [saveGet $next "titel"]]
      set interpret [string trim [saveGet $next "interpret"]]
      set start [saveGet $next "sec"]
      if { $lastsong_886 != $currentsong } {
        set lastsong_886 $currentsong
        postSong "\0030888.6\00300" $currentsong $interpret $start
      }
    }
  } else {
    return 1
  }
  http::cleanup $url
}

proc oe3check {} {
  global lastsong_oe3
  set url [http::geturl http://ms01.oe3.fm/oe3metafiles/RMX/RMWEB.PHP?Res=200&Format=json]

  if {[http::status $url] == "ok"} {
    #set data [string map {"\}]\})" "\}]\}"} [string map {"onair(" ""} [http::data $url]]]
    set data [http::data $url]
    set dict [json::json2dict $data]
    if {[dict exists $dict "SPIELLISTENELEMENT"]} {
      #set elements [dict get $dict "SPIELLISTENELEMENT"]
      #set song [lindex $elements end]
      foreach {songl} [saveGet $dict "SPIELLISTENELEMENT"] {
        if { [saveGet $songl "HINWEIS"] eq "ES FOLGT "} {
          set song $songl
          break
        }
      }
      if {[info exists song]} {
        set currentsong [string trim [saveGet $song "TITEL"]]
        set interpret [string trim [saveGet $song "INTERPRET"]]
        set start [saveGet $song "ZEIT"]

        if { $lastsong_oe3 != $currentsong } {
         set lastsong_oe3 $currentsong
          postSong "\00302OE3\00300" $currentsong $interpret $start
        }
      }
    }
  } else {
    return 1
  }
  http::cleanup $url
}

proc wdr2check {} {
  global lastsong_wdr2
  set url [http::geturl http://www.wdr2.de/musik/playlist_neu100-akkordeon-playlist.html]

  if {[http::status $url] == "ok"} {
    #set data [string map {"\}]\})" "\}]\}"} [string map {"onair(" ""} [http::data $url]]]
    set data [http::data $url]
    set doc [ dom parse -html $data ] 
    set root [$doc documentElement]

    set node [$root selectNodes {//p}]
    set interpret [string map {":" ""} [$node selectNodes {string(//strong)}]]
    set currentsong [string trim [[$node lastChild] asHTML]]

    if { $lastsong_wdr2 != $currentsong } {
     set lastsong_wdr2 $currentsong
      postSong "\00304WDR2\00300" $currentsong $interpret 0
    }
  } else {
    return 1
  }
  http::cleanup $url
}

proc gotvcheck {} {
  global lastsong_gotv
  set url [http::geturl http://www.gotv.at/titel_load_data.asp]

  if {[http::status $url] == "ok"} {
    set data [http::data $url]
    set lines [split $data "\n"]
    foreach line $lines {

       ## Split into fields on colons
       set fields [split $line ":"]

       ## Assign fields to variables and print some out...
       lassign $fields \
             key val
        if {$key eq "Artist_Next"} {
          set interpret $val
          continue
        }
        if {$key eq "Title_Next"} {
          set currentsong $val
          continue
        }
    }
    if {[info exists currentsong] && [info exists interpret]} {
      if { $lastsong_gotv != $currentsong } {
       set lastsong_gotv $currentsong
        postSong "\00314go\00315TV\00300" $currentsong $interpret 0
      }
    }
  } else {
    return 1
  }
  http::cleanup $url
}

proc postSong {station title interpret start} {
  global standalone
  if {$standalone} {
    puts stdout "$station: $title - $interpret (Starts: ~$start)"
  } else {
    puthelp "PRIVMSG #musiclog :$station: $title - $interpret (Starts: ~$start)"
  }
}

proc saveGet { dict key } {
  if { [catch { dict exists $dict $key } exist] } {
    bgerror "Invalid data received."
    return ""
  } else {
    if { $exist } {
      return [dict get $dict $key]
    }
  }
  return ""
}

if {!$standalone} {
  putlog "Musiclog geladen!"
}

# Start first execution
enable