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"""
Accesses eBay.com for various things
"""

import supybot

__revision__ = "$Id$"
__author__ = supybot.authors.jamessan

import re
import cgi
import sets
import getopt

import supybot.conf as conf
import supybot.utils as utils
from supybot.commands import *
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.privmsgs as privmsgs
import supybot.registry as registry
import supybot.webutils as webutils
import supybot.callbacks as callbacks


def configure(advanced):
    from supybot.questions import output, expect, anything, something, yn
    conf.registerPlugin('Ebay', True)
    output("""The Ebay plugin has the functionality to watch for URLs
              that match a specific pattern (we call this a snarfer). When
              Supybot sees such a URL, he will parse the web page for
              information and reply with the results.""")
    if yn('Do you want the Ebay snarfer enabled by default?'):
        conf.supybot.plugins.Ebay.auctionSnarfer.setValue(True)

class EbayError(Exception):
    pass

conf.registerPlugin('Ebay')
conf.registerChannelValue(conf.supybot.plugins.Ebay, 'auctionSnarfer',
    registry.Boolean(False, """Determines whether the bot will automatically
    'snarf' Ebay auction URLs and print information about them."""))

class Ebay(callbacks.PrivmsgCommandAndRegexp):
    """
    Module for eBay stuff. Currently contains a URL snarfer and a command to
    get info about an auction.
    """
    threaded = True
    callBefore = ['URL']
    regexps = ['ebaySnarfer']

    _reopts = re.I | re.S
    _invalid = re.compile(r'(is invalid, still pending, or no longer in our '
                          r'database)', _reopts)
    _info = re.compile(r'<title>eBay item (\d+) \([^)]+\) - ([^<]+)</title>',
                       _reopts)

    _bid = re.compile(r'((?:Current|Starting) bid):.+?<b>([^<]+?)<fo', _reopts)
    _winningBid = re.compile(r'(Winning bid|Sold for):.+?<b>([^<]+?)<font',
                             _reopts)
    _time = re.compile(r'(Time left):.+?<b>([^<]+?)</b>', _reopts)
    _bidder = re.compile(r'(High bidder):.+?(?:">(User ID) (kept private)'
                         r'</font>|<a href[^>]+>([^<]+)</a>.+?'
                         r'<a href[^>]+>(\d+)</a>)', _reopts)
    _winningBidder = re.compile(r'(Winning bidder|Buyer):.+?<a href[^>]+>'
                               r'([^<]+)</a>.+?<a href[^>]+>(\d+)</a>',_reopts)
    _buyNow = re.compile(r'alt="(Buy It Now)">.*?<b>([^<]+)</b>', _reopts)
    _seller = re.compile(r'(Seller information).+?<a href[^>]+>([^<]+)</a>'
                         r'.+ViewFeedback.+">(\d+)</a>', _reopts)
    _searches = (_bid, _winningBid, _time, _bidder,
                 _winningBidder, _buyNow, _seller)
    _multiField = (_bidder, _winningBidder, _seller)

    def auction(self, irc, msg, args, item):
        """<item>

        Return useful information about the eBay auction with item number
        <item>.
        """
        url = 'http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=%s' % item
        try:
            irc.reply('%s <%s>' % (self._getResponse(url), url))
        except EbayError, e:
            irc.reply(str(e))
    auction = wrap(auction, [('id', 'auction')])

    def ebaySnarfer(self, irc, msg, match):
        r'http://cgi\.ebay\.(?:com(?:\.au)?|co\.uk|ca)/.*' \
        r'eBayISAPI\.dll\?ViewItem&([\S]+)'
        if not self.registryValue('auctionSnarfer', msg.args[0]):
            return
        queries = cgi.parse_qs(match.group(1))
        if 'item' not in queries and 'category' not in queries:
            return
        url = match.group(0)
        try:
            irc.reply(self._getResponse(url), prefixName=False)
        except EbayError, e:
            self.log.info('ebaySnarfer exception at %s: %s', url, str(e))
    ebaySnarfer = urlSnarfer(ebaySnarfer)

    def _getResponse(self, url):
        try:
            s = webutils.getUrl(url)
        except webutils.WebError, e:
            raise EbayError, str(e)
        resp = []
        m = self._invalid.search(s)
        if m:
            raise EbayError, 'That auction %s' % m.group(1)
        m = self._info.search(s)
        if m:
            (num, desc) = m.groups()
            resp.append('%s%s: %s' % (ircutils.bold('Item #'),
                                      ircutils.bold(num),
                                      utils.htmlToText(desc)))
        def bold(L):
            return (ircutils.bold(L[0]),) + L[1:]
        for r in self._searches:
            m = r.search(s)
            if m:
                if r in self._multiField:
                    # Have to filter the results from self._bidder since
                    # 2 of the 5 items in its tuple will always be None.
                    #self.log.warning(m.groups())
                    matches = filter(None, m.groups())
                    resp.append('%s: %s (%s)' % bold(matches))
                else:
                    resp.append('%s: %s' % bold(m.groups()))
        if resp:
            return '; '.join(resp)
        else:
            raise EbayError, 'That doesn\'t appear to be a proper eBay ' \
                             'auction page.  (%s)' % \
                             conf.supybot.replies.possibleBug()

Class = Ebay

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