#!/usr/bin/env python

from subprocess import Popen, PIPE
import re
import urllib2
import cjson
import datetime

def retrieve_random():
    req = urllib2.Request('http://spraakbanken.gu.se/ws/saldo-ws/lid/json/rnd')
    req.add_header('Pragma', 'no-cache')
    content = urllib2.urlopen(req).read().decode('UTF-8')
    return cjson.decode(content)

def pos(random):
    pos = []
    for l in random['l']:
        pos.append(re.findall(u'\.\.(.+)\.',l)[0])
    return ",".join(pos)

def sblex(word):
    return 'http://spraakbanken.gu.se/sblex/%s' % (word)

def to_word(lex):
    return re.split(r'\.\.',lex)[0].replace('_',' ')

def render(random):
    lex = to_word(random['lex'])
    fp  = random['fp']
    fm  = to_word(random['fm'])
    if  fp != 'PRIM..1':
        fp = ' + '+to_word(fp)
    else:
        fp = ''
    wc = pos(random)
    return '%s:%s [ %s%s ]' % (lex,wc,fm,fp)

def produce_rss():
    random = retrieve_random()
    date = str(datetime.datetime.now()).split('.')[0]
    result = '''<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
  <channel>
    <atom:link href="http://spraakbanken.gu.se/rss/tidbits.xml" rel="self" type="application/rss+xml" />
    <title>SALDO</title>
    <link>http://spraakbanken.gu.se/saldo</link>
    <description>SALDO</description>
    <image>
        <title>SALDO</title>
        <url>http://spraakbanken.gu.se/sites/spraakbanken.gu.se/files/img/saldo/saldo.gif</url>
        <link>http://spraakbanken.gu.se/saldo</link>
    </image>\n'''
    random_rendering = render(random)
    result += '  <item>\n'
    result += '   <title>%s</title>\n' %(random_rendering)
    result += '   <guid isPermaLink="false">%s</guid>\n' % (date)
    result += '   <link>%s</link>\n' % (sblex(to_word(random['lex']))) 
    result += '   <description>%s (%s)</description>\n' % (random_rendering,date) 
    result += '  </item>\n'
    result += '</channel>\n'
    result += '</rss>'
    return result

if __name__ == '__main__':
    print produce_rss().encode('UTF-8')