#!/usr/bin/python2.4

import cgi
import cgitb; cgitb.enable()
from count import wordcount


def main():
    form = cgi.FieldStorage()
    print "Content-Type: text/html"
    print
    fog = Fog(form)
    fog.ui()


class Fog:
    def __init__(self, form):
        self.debug = 0
        self.contents = {}
        self.comment = form.getvalue("comment", "")
        self.sentencecount, self.words = wordcount(self.comment)  

        if self.debug: self.contents["message"] = '<pre>' + `form` + '</pre><br />\n\n'
        else: self.contents["message"] = ''

        try:
            self.contents["state"] = int(form.getvalue("s", 1))
        except:
            self.contents["state"] = 0

        if 'back' in form:
            self.contents["state"] -= 1

        if 'next' in form:
            self.contents["state"] += 1

        if self.contents["state"] == 1 or self.contents["state"] > 3 or not self.comment or not self.sentencecount:
            self.contents["state"] = 1
            if not self.sentencecount and 'next' in form:
                self.contents["message"] += '<h2>Please enter the sample with sentences in the text box below:</h2>'
                self.contents["message"] += '<p>An example:</p>'
                self.contents["message"] += '<pre>Helsinki is the capital of Finland. Did you you know that?</pre>'
            self.first()
        elif self.contents["state"] < 1:
            self.contents["state"] = 1
            self.comment = ''
            self.first()
        elif self.contents["state"] == 2:
            self.second()
        elif self.contents["state"] == 3:
            self.third(form)

    def first(self):
        self.contents["message"] += '<label class="fieldname" for="comment">Please input a text sample</label><textarea rows="6" cols="60" name="comment" id="comment">'
        self.contents["message"] += self.comment
        self.contents["message"] += '</textarea>'
        self.contents["back"] = 'Clear'

    def second(self):
        self.contents["message"] += '<h1>Please select hard or big words, with more than 3 <a href="http://dictionary.reference.com/search?q=syllables">syllabyles</a></h1>'
        #self.contents["message"] += '<h2>Sentence count: %s</h2>' % self.sentencecount
        #self.contents["message"] += '<h2>Word count: %s</h2>' % len(self.words)
        for word in self.unique(self.words.keys()):
            self.contents["message"] += '<input type="checkbox" name="hardwords" value="%s" />%s' % (word, word)
        self.contents["message"] += '<input type="hidden" name="comment" value="%s" />' % self.comment

    def unique(self, list):
        """ Return (sorted) unique elements """
        d = {}
        for x in list:
            d[x] = 1
        subset = d.keys()
        subset.sort(self.bigstrings)
        return subset

    def bigstrings(self, x, y):
        """ comparison function to return largest string """

        if len(x) < len(y):
            return 1

        if len(x) > len(y):
            return -1

        if len(x) == len(y):
            return 0

    def valueadd(self, d, l):
        """ Adds the dict d values for the corresponding keys in the list l """
        total = 0
        for i in l:
            if i in d:
                total += d[i]
        return total

        
    def third(self, form):
        wcount = len(self.words)
        hardwords = form.getlist("hardwords")
        q = form.getvalue("q", 0.4)
        q = float(q) # check
        if self.debug: self.contents["message"] += '<pre>%s</pre>' % hardwords
        hardwordcount = self.valueadd(self.words, hardwords)

        if hardwordcount:
            avghardword = (float(hardwordcount) / float(wcount)) * 100
        else:
            avghardword = 0
        
        avgwordpersentence = (float(wcount) / float(self.sentencecount))
        
        self.contents["message"] += '<h2>= %s * ((number of words) / (number of sentences) + percentage of hard words)</h2>' % q
        self.contents["message"] += '<h2>= %s * (%s + %s)</h2>' % (q, avgwordpersentence, avghardword)
        self.contents["message"] += '<h2>= %s</h2>' % (q * (avgwordpersentence + avghardword))
        self.contents["message"] += '<dl>'
        self.contents["message"] += '<dt>Number of words</dt><dd>%s</dd>' % wcount
        self.contents["message"] += '<dt>Number of sentences</dt><dd>%s</dd>' % self.sentencecount 
        self.contents["message"] += '<dt>Average number of words per sentence</dt><dd>%s</dd>' % avgwordpersentence
        self.contents["message"] += '<dt>Number of hard words</dt><dd>%s</dd>' % hardwordcount
        self.contents["message"] += '<dt>Average number of hard words</dt><dd>%s</dd>' % (str(avghardword) + '%')
        self.contents["message"] += '</dl>'
    
        self.contents["message"] += '<input type="hidden" name="comment" value="%s" />' % self.comment
        self.contents["message"] += desc



        self.contents["next"] = 'Start over'
        

    def ui(self):
        if "back" not in self.contents:
            self.contents["back"] = 'Back'
        if "next" not in self.contents:
            self.contents["next"] = 'Next'
        print template % self.contents

template = """
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-gb">
<head>
  <title>Gunning Fog Index - (%(state)d of 3)</title>
  <link rel="stylesheet" type="text/css" href="fog.css" media="all" />


</head>

<body>

<form method="get" action="fog.cgi">
<fieldset>
<input class="left" type="submit" name="back" value="%(back)s" />
<input class="right" type="submit" name="next" value="%(next)s" />
</fieldset>

<div class="message"> 
<input type="hidden" name="s" value="%(state)d" />

%(message)s

</div>



</form>

<p class="footer">
<a href="http://validator.w3.org/check/referer">Validate XHTML</a><a href="http://jigsaw.w3.org/css-validator/check/referer">Validate CSS</a>
</p>

</body>
</html>
"""


desc = """


<h3>Scale guideline</h3>
<p>Easy reading range is 6-10. The average person reads at the level 9. 
Anything above 17th level is difficult for university students.</p>

<h3>Limitations</h3>
<ul>

<li>A low style of writing can result from a slavish use of readability indexes
as a monotonous succession of short sentences and simple words can make your
writing dull and dull writing does not hold the reader's attention.</li>

<li>the indexes frequently give conflicting results</li></ul>

<h3>Best use of this Index</h3>
<ul>
<li>Use the formulas as a general guide </li>
<li>Formulas will not replace the clear and logical thinking that is the foundation of all clear writing</li></ul>

<h3>Links</h3>
<ul>
<li><a href="http://www.juicystudio.com/fog/">Juicy Studios: Readability tests</a></li>
<li><a href="http://isu.indstate.edu/nelsons/asbe336/PowerPoint/fog-index.htm">Source of limitations text</a></li>
</ul>
"""

if __name__ == "__main__":                                                                                                                                                
    main()