#!/usr/bin/env ruby
# encoding: utf-8

require "gst"

if ARGV.length < 1
  puts "usage: #{$0} <media file or uri>"
  exit(false)
end

Gst.init

playbin = Gst::ElementFactory.make("playbin", "playbin")
if playbin.nil?
  puts "'playbin' gstreamer plugin missing"
  exit(false)
end

# take the commandline argument and ensure that it is a uri
if Gst.valid_uri?(ARGV.first)
  uri = ARGV.first
else
  uri = Gst.filename_to_uri(ARGV.first)
end
playbin.uri = uri

playbin.pause
sleep 1
p "slept"
bus = playbin.bus
tags=Gst::TagList.new
while message=bus.pop
	if message.type==Gst::MessageType::TAG
		tags=tags.merge(message.parse_tag, Gst::TagMergeMode::KEEP)
	end
end

if tags.empty?
	puts "No metadata found for #{}"
else
	tags.each do |taglist, tag|		
		if taglist.get_tag_size(tag)==1
			puts "%-15s: %s" % [Gst.tag_get_nick(tag), taglist.get_value_index(tag, 0).value]
		else
			puts "#{tag}"
		end
	end
end

puts tags

class Gst::TagList
	def to_hash
		hash={}#Use symbol for hash keys?
		n_tags.times do |i|
			name=nth_tag_name(i)
			n=get_tag_size(name)
			if n==1
				hash[name]=get_value_index(name, 0).value
			else
				hash[name]=[]
				n.times do |i|
					hash[name].push(get_value_index(name, i).value)
				end
			end
		end
		hash
	end

	alias_method :gi_each, :each
	def each(&block)
		to_hash.each(&block)
	end
end

tags.each{|name, value| puts "%-15s: %s" % [Gst.tag_get_nick(name), value]}
p tags.to_hash
p tags.each