#!/usr/bin/python

import os
import sys
import optparse
import re
import time, datetime

try:
    from simplemediawiki import MediaWiki
except ImportError:
    print "Unable to import simplemediawiki.  Is python-simpemediawiki installed?"
    sys.exit(1)

time_fmt = "%Y-%m-%dT%H:%M:%SZ"

def parse_args():
    '''Set up the option parser'''
    parser = optparse.OptionParser(usage="%prog [options] <action> [options]")
    parser.add_option('-v', '--verbose', action='store_true', default=False,
        help='Enable more verbose output')
    parser.add_option('-d', '--debug', action='store_true', default=False,
        help='Enable debugging output')
    parser.add_option('--url', action='store', default='https://fedoraproject.org/w/api.php',
        help='API URL')

    # general
    def default_start():
        return time.strftime(time_fmt, time.localtime())
    def default_end():
        # default to the last 30 days
        today = datetime.datetime.today()
        one_month = datetime.timedelta(days=30)
        return (today - one_month).strftime(time_fmt)

    optgrp = optparse.OptionGroup(parser, "General options")
    optgrp.add_option('--start', action='store', default=default_start(),
        help='Limit results using start date')
    optgrp.add_option('--end', action='store', default=default_end(),
        help='Limit results using end date')
    optgrp.add_option('-n', '--namespace', dest="namespaces",
        action='append', default=[],
        help='Limit results to a specific namespace (accepts multiple values)')
    optgrp.add_option('-l', '--limit', action='store', default=5, type="int",
        help='Limit recursion depth (%default)')
    parser.add_option_group(optgrp)

    # list_categorymembers
    optgrp = optparse.OptionGroup(parser, "Options for 'categorymembers' command:")
    optgrp.add_option('-c', '--category', dest="categories",
        default=[], action="append",
        help='Wiki category name to query (accepts multiple values)')
    parser.add_option_group(optgrp)

    # list_usercontribs
    optgrp = optparse.OptionGroup(parser, "Options for 'usercontribs' and 'usercontribstable'")
    optgrp.add_option('-u', '--user', dest="users",
        default=[], action="append",
        help='FAS username to query (accepts multiple values)')
    parser.add_option_group(optgrp)

    optgrp = optparse.OptionGroup(parser, "Options for 'parse' and 'get'")
    optgrp.add_option('-t', '--title',
        default='', action='store',
        help='Page title to parse')
    parser.add_option_group(optgrp)

    optgrp = optparse.OptionGroup(parser, "Options for 'recentchanges'")
    parser.add_option_group(optgrp)

    (opts, args) = parser.parse_args()

    if len(args) == 0:
        parser.error("No action specified")
    else:
        action = args[0]

    # Validate inputs
    if action == 'categorymembers':
        if len(opts.categories) == 0:
            parser.error("Must specify at least one category (-c|--category)")
    elif action in ['usercontribs', 'usercontribstable']:
        if len(opts.users) == 0:
            parser.error("Must specify at least one category (-u|--user)")
        else:
            # expand space or comma-delimited values
            idx = 0
            split_re="[ ,]"
            while idx < len(opts.users):
                u = opts.users[idx]
                if re.search(split_re, u):
                    opts.users[idx] = re.split('[ ,]', u)[0]
                    opts.users.extend(re.split('[ ,]', u)[1:])
                idx += 1
            opts.users.sort() # sort list
    elif action in ['parse', 'get']:
        if opts.title == '':
            parser.error("Must specify a page (-t|--title)")

    return (opts, action)

def list_namespaces(wiki):
    query = dict(action='query',
                 meta='siteinfo',
                 siprop='namespaces')

    if opts.debug: print query
    response = wiki.call(query)
    if opts.debug: print response

    namespaces = dict()
    for id,entry in response.get('query',{}).get('namespaces',{}).items():
        if entry.has_key('canonical'):
            namespaces[entry['canonical']] = id

    return namespaces

def recentchanges(wiki, date_start='', date_end='', namespaces=""):
    # https://fedoraproject.org/w/api.php?action=query&list=recentchanges&rcprop="title|timestamp|ids|user
    # Build query arguments and call wiki
    query = dict(action='query',
                 list='recentchanges',
                 rcprop="title|timestamp|ids|user",
                 rclimit=50,
                 )
    # FIXME - validate date input (expected format "%Y-%m-%dT%H:%M:%S")
    if date_start != '':
        query['rcstart'] = date_start
    if date_end != '':
        query['rcend'] = date_end
    if namespaces != '':
        query['rcnamespace'] = namespaces

    if opts.debug: print query
    response = wiki.call(query)
    if opts.debug: print response

    changes = list()
    # If necesary, repeatedly call the server to get more data
    while response.has_key('query-continue'):
        changes.extend( [entry.get('title') for entry in response.get('query',{}).get('recentchanges',[]) if entry.has_key('title')] )
        query['rccontinue'] = True
        query['rcstart'] = response['query-continue']['recentchanges']['rcstart']
        if opts.debug: print query
        response = wiki.call(query)
        if opts.debug: print response

    # Extract any remaining data  from the response
    changes.extend( [entry.get('title') for entry in response.get('query',{}).get('recentchanges',[]) if entry.has_key('title')] )

    # Sort results
    changes.sort()
    return changes

def list_usercontribs(wiki, user, date_start='', date_end='', namespaces=""):
    '''Return a dictionary of page names and commits'''
    # "https://fedoraproject.org/w/api.php?action=query&list=usercontribs&uclimit=100&ucuser=jlaska&ucstart=2010-11-11T00:00:00Z&ucend=2010-11-01T23:59:59Z"
    # Build query arguments and call wiki
    query = dict(action='query',
                 list='usercontribs',
                 uclimit=50,
                 ucuser=user)
    # FIXME - validate date input (expected format "%Y-%m-%dT%H:%M:%S")
    # FIXME - move this to parse_args()
    def recognize_date(d):
        yyyymmdd = re.match(r'^(\d{2,4})([ -])(\d{1,2})([ -])(\d{1,2})\s*(.*)$', d)
        if yyyymmdd:
            hhmmss = re.match(r'(\d{1,2})[ -:\.](\d{1,2})[ -:\.](\d{1,2})', yyyymmdd.group(6))
            if hhmmss:
                date = datetime.datetime.strptime(d, \
                    "%%Y%s%%m%s%%d %%H:%%M:%%S" % (yyyymmdd.group(2), yyyymmdd.group(4)))
            else:
                date = datetime.datetime.strptime(d, \
                    "%%Y%s%%m%s%%d" % (yyyymmdd.group(2), yyyymmdd.group(4)))
            date_str = date.strftime('%Y-%m-%dT%H:%M:%SZ')
            return date_str
        else:
            # FIXME - return error for unexpected date format
            raise Exception("Unrecognized date format: %s" % d)

    if date_start != '':
        # Convert to expected format
        date_start = recognize_date(date_start)
        query['ucstart'] = date_start
    if date_end != '':
        date_end = recognize_date(date_end)
        query['ucend'] = date_end
    if namespaces != '':
        query['ucnamespace'] = namespaces
    if date_start != '' and date_end != '':
        # if we can recognize the date format, see if we need to add ucdir
        try:
            date_start = re.sub('[TZ]', ' ', date_start).strip()
            date_end = re.sub('[TZ]', ' ', date_end).strip()
            ds = datetime.datetime.strptime(date_start, '%Y-%m-%d %H:%M:%S')
            de = datetime.datetime.strptime(date_end, '%Y-%m-%d %H:%M:%S')
            if ds < de:
                query['ucdir'] = 'newer'
        except ValueError, e:
            pass

    if opts.debug: print query
    response = wiki.call(query)
    if opts.debug: print response

    contribs = list()
    # If necesary, repeatedly call the server to get more data
    while response.has_key('query-continue'):
        contribs.extend( [entry.get('title') for entry in response.get('query',{}).get('usercontribs',[]) if entry.has_key('title')] )
        query['uccontinue'] = True
        query['ucstart'] = response['query-continue']['usercontribs']['ucstart']
        if opts.debug: print query
        response = wiki.call(query)
        if opts.debug: print response

    # Extract any remaining data  from the response
    contribs.extend( [entry.get('title') for entry in response.get('query',{}).get('usercontribs',[]) if entry.has_key('title')] )

    # Sort results
    contribs.sort()
    return contribs

def parse(wiki, page):
    '''Parse a page and return content'''

    # Build query arguments and call wiki
    query = dict(action='parse',
                 page=page)
    if opts.debug: print query
    response = wiki.call(query)
    return response.get('parse',{}).get('text',{}).get('*','')

def getraw(wiki, titles):
    '''Return raw mediawiki content of a specified page'''

    # Build query arguments and call wiki
    query = dict(action='query',
                 prop='revisions',
                 titles=titles,
                 rvlimit=1,
                 rvexpandtemplates=1,
                 rvprop='content')
    if opts.debug: print query
    response = wiki.call(query)
    rev = response.get('query',{}).get('pages',{})
    # XXX - only returns the first rev ... do we care?
    for page in response.get('query',{}).get('pages',{}).values():
        revs = page.get('revisions',[])
        for rev in revs:
            return rev.get('*','')
    return ''

def list_categorymembers(wiki, cat_page, limit=5, namespaces=''):
    '''Return a list of pages belonging to category page'''
    # Add 'Category:' prefix if not given
    if not cat_page.startswith("Category:"):
        cat_page = "Category:%s" % cat_page

    # Build query arguments and call wiki
    query = dict(action='query',
                 list='categorymembers',
                 cmlimit=50,
                 cmtitle=cat_page)
    if namespaces != '':
        query['cmnamespace'] = namespaces

    if opts.debug: print query
    response = wiki.call(query)
    if opts.debug: print response

    # Are more results available?
    members = list()
    # If necesary, repeatedly call the server to get more data
    while response.has_key('query-continue'):
        # get category member page names (limit to sub-categories if requested)
        members.extend( [entry.get('title') for entry in response.get('query',{}).get('categorymembers',{}) if entry.has_key('title')] )
        query['cmcontinue'] = response['query-continue']['categorymembers']['cmcontinue']
        if opts.debug: print query
        response = wiki.call(query)
        if opts.debug: print response

    # Extract any remaining data  from the response
    members.extend( [entry.get('title') for entry in response.get('query',{}).get('categorymembers',{}) if entry.has_key('title')] )

    # Determine whether we need to recurse
    idx = 0
    while True:
        if idx >= len(members) or limit <= 0:
            break
        # Recurse?
        if members[idx].startswith('Category:') and limit > 0:
            members.extend(list_categorymembers(wiki, members[idx], limit-1, namespaces))
        idx += 1

    return members

if __name__ == "__main__":
    (opts,action) = parse_args()

    # Create mediawiki handle
    wiki = MediaWiki(opts.url)

    if action == 'categorymembers':
        ns_ids = ''
        if len(opts.namespaces) > 0:
            ns_ids = list()
            namespaces = list_namespaces(wiki)
            ns_ids = '|'.join([namespaces[ns] for ns in opts.namespaces if namespaces.has_key(ns)])
        for cat_page in opts.categories:
            pages = list_categorymembers(wiki, cat_page, opts.limit, ns_ids)
            if pages:
                print "\n".join(pages)
            else:
                print "No data found for '%s'" % cat_page

    elif action in ['usercontribs', 'usercontribstable']:
        # Gather namespace arguments
        ns_ids = ''
        if len(opts.namespaces) > 0:
            ns_ids = list()
            namespaces = list_namespaces(wiki)
            ns_ids = '|'.join([namespaces[ns] for ns in opts.namespaces if namespaces.has_key(ns)])

        # Gather data
        user_edits = dict()
        for user in opts.users:
            user_edits[user] = list_usercontribs(wiki, user, date_start=opts.start, date_end=opts.end, namespaces=ns_ids) # '2010-12-31T00:00:00Z', '2010-10-01T00:00:00Z')

        # Display list of user contributions
        if action == 'usercontribs':
            user_pages = dict()
            for user in opts.users:
                # Create unique list of pages each user edited
                if not user_pages.has_key(user):
                    user_pages[user] = dict()
                for page in user_edits[user]:
                    if not user_pages[user].has_key(page):
                        user_pages[user][page] = 0
                    user_pages[user][page] += 1

                print "= Wiki contributions for %s between %s and %s =" % (user, opts.start[:10], opts.end[:10])
                import operator
                #for page,edits in user_pages[user].items():
                for item in sorted(user_pages[user].iteritems(), key=operator.itemgetter(0)):
                    print " * %s (%s edits)" % (item)
                print ""

        # Display table of contributions where x/y axis == user / namespace
        elif action == 'usercontribstable':
            # Count pages/edits for each namespace
            namespaces = dict()
            for user,pages in user_edits.items():
                for p in pages:
                    if p.count(':') > 0:
                        ns = p.split(':',1)[0] + ':'
                    else:
                        ns = "Main:"

                    # Initialize per-ns dict
                    if not namespaces.has_key(ns):
                        namespaces[ns] = dict()

                    # Initialize per-user dict
                    if not namespaces[ns].has_key(user):
                        namespaces[ns][user] = dict(pages={}, edits=0)

                    # Increment count of edits
                    namespaces[ns][user]['edits'] += 1
                    namespaces[ns][user]['pages'][p] = 0

            # Total the number of unique pages
            for ns,users in namespaces.items():
                for user in users:
                    namespaces[ns][user]['pages'] = len(namespaces[ns][user]['pages'].keys())

            # Print banner
            print "= Wiki contributions between %s and %s =" % (opts.start[:10], opts.end[:10])
            # Banner row#1
            idx = 0
            for u in opts.users:
                # if halfway through list ...
                if idx >= len(opts.users)/2:
                    sys.stdout.write("Number of pages (number of edits)")
                    break
                else:
                    sys.stdout.write("%10s " % (" "*10))
                idx += 1
            sys.stdout.write("\n")
            # Banner row#2
            sys.stdout.write("%-20s " % "Namespace")
            garbage = [sys.stdout.write("%10s " % u) for u in opts.users]
            sys.stdout.write("%10s " % "Total")
            sys.stdout.write("\n")
            # Banner row#3
            sys.stdout.write("%-20s-" % ("-"*20))
            garbage = [sys.stdout.write("%10s-" % ("-"*10)) for u in opts.users]
            sys.stdout.write("%10s-" % ("-"*10))
            sys.stdout.write("\n")

            # Display data
            for ns in namespaces.keys():
                sys.stdout.write("%-20s " % ns)
                ttl_pages = 0
                ttl_edits = 0
                for u in opts.users:
                    num_pages = namespaces[ns].get(u, {}).get('pages', 0)
                    num_edits = namespaces[ns].get(u, {}).get('edits', 0)
                    ttl_pages += num_pages
                    ttl_edits += num_edits
                    sys.stdout.write("%10s " % ("%s (%s)" % (num_pages, num_edits)))
                #garbage = [sys.stdout.write("%10s " % namespaces[ns].get(u,0)) for u in opts.users]
                sys.stdout.write("%10s " % ("%s (%s)" % (ttl_pages, ttl_edits)))
                sys.stdout.write("\n")

            sys.stdout.write("%-20s-" % ("-"*20))
            garbage = [sys.stdout.write("%10s-" % ("-"*10)) for u in opts.users]
            sys.stdout.write("%10s-" % ("-"*10))
            sys.stdout.write("\n")

            # Display bottom total
            ttl_pages = 0
            ttl_edits = 0
            sys.stdout.write("%-20s " % "Total")
            for u in opts.users:
                num_pages = reduce(lambda x,y: x+y, [namespaces[ns].get(u, {}).get('pages', 0) for ns in namespaces.keys()])
                num_edits = reduce(lambda x,y: x+y, [namespaces[ns].get(u, {}).get('edits', 0) for ns in namespaces.keys()])
                ttl_pages += num_pages
                ttl_edits += num_edits
                sys.stdout.write("%10s " % ("%s (%s)" % (num_pages, num_edits)))
            sys.stdout.write("%10s " % ("%s (%s)" % (ttl_pages, ttl_edits)))
            sys.stdout.write("\n")

    elif action == 'parse':
        print parse(wiki, opts.title)

    elif action == 'get':
        print getraw(wiki, opts.title)

    elif action == 'recentchanges':
        # FIXME
        # ianweller explained that mediawiki only retains the 500 most recent
        # changes for inspection
        print "Experimental!!"
        # Gather namespace arguments
        ns_ids = ''
        if len(opts.namespaces) > 0:
            ns_ids = list()
            namespaces = list_namespaces(wiki)
            for ns in opts.namespaces:
                if namespaces.has_key(ns):
                    ns_ids.append(namespaces[ns])
            ns_ids = "|".join(ns_ids)

        print recentchanges(wiki, opts.start, opts.end, ns_ids)

    else:
        print "Unknown action requested '%s'" % action
        sys.exit(1)