"""
Display a box with some ticket links onto right of the page.
Tickts are sorted and uniq'ed.

Example:
{{{
[[TicketBox(#1,#7,#31)]]               ... list of tickets
[[TicketBox(1,7,31)]]                  ... '#' char can be omitted
[[TicketBox({1})]]                     ... expand report result as ticket list
[[TicketBox([report:1])]]              ... alternate format of report
[[TicketBox([report:9?name=val])]]     ... report with dynamic variable
[[TicketBox({1),#50,{2},100)]]         ... convination of above
[[TicketBox(500pt,{1})]]               ... with box width as 50 point
[[TicketBox(200px,{1})]]               ... with box width as 200 pixel
[[TicketBox(25%,{1})]]                 ... with box width as 25%
[[TicketBox('Different Title',#1,#2)]] ... Use different title
[[TicketBox(\"Other Title\",#1,#2)]]     ... likewise
}}}

[wiki:TracReports#AdvancedReports:DynamicVariables Dynamic Vaiables] 
is supported for report. Other variables can be specified like
{{{[report:9?PRIORITY=high&COMPONENT=ui]}}}. Of course, the special
variable '{{{$USER}}}' is available.
"""

## NOTE: CSS2 defines 'max-width' but it seems that only few browser
##       support it. So I use 'width'. Any idea?

import re
import string

## default style values
styles = { "float": "right",
           "background": "#f7f7f0",
           "width": "",
           }

args_pat = [r"#?(?P<tktnum>\d+)",
            r"{(?P<rptnum>\d+)}",
            r"\[report:(?P<rptnum2>\d+)(?P<dv>\?.*)?\]",
            r"(?P<width>\d+(pt|px|%))",
            r"(?P<title1>'.*')",
            r'(?P<title2>".*")']

def uniq(x):
    y=[]
    for i in x:
        if not y.count(i):
            y.append(i)
    return y

def execute(hdf, txt, env):
    if not txt:
        txt = ''
    items = []
    title = "Tickets"
    args_re = re.compile("^(?:" + string.join(args_pat, "|") + ")$")
    for arg in [string.strip(s) for s in txt.split(',')]:
        match = args_re.match(arg)
        if not match:
            env.log.debug('TicketBox: unknown arg: %s' % arg)
            continue
        elif match.group('title1'):
            title = match.group('title1')[1:-1]
        elif match.group('title2'):
            title = match.group('title2')[1:-1]
        elif match.group('width'):
            styles['width'] = match.group('width')
        elif match.group('tktnum'):
            items.append(int(match.group('tktnum')))
        elif match.group('rptnum') or match.group('rptnum2'):
            num = match.group('rptnum') or match.group('rptnum2')
            dv = {}
            # username
            dv['USER'] = hdf.getValue('trac.authname', 'anonymous')
            if match.group('dv'):
                for expr in string.split(match.group('dv')[1:], '&'):
                    k, v = string.split(expr, '=')
                    dv[k] = v
            #env.log.debug('dynamic variables = %s' % dv)
            db = env.get_db_cnx()
            curs = db.cursor()
            try:
                curs.execute('SELECT sql FROM report WHERE id=%s' % num)
                (sql,) = curs.fetchone()
                # replace dynamic variables
                for k, v in dv.iteritems():
                    sql = re.sub(r'\$%s\b' % k, v, sql)
                #env.log.debug('sql = %s' % sql)
                curs.execute(sql)
                for row in curs.fetchall():
                    items.append(row['ticket'])
            finally:
                if not hasattr(env, 'get_cnx_pool'):
                    # without db connection pool, we should close db.
                    curs.close()
                    db.close()
    items = uniq(items)
    items.sort()
    html = ''
    try:
        # for trac 0.9 or later
        from trac.wiki.formatter import wiki_to_oneliner
        html = wiki_to_oneliner(string.join(["#%d" % c for c in items], ", "),
                               env, env.get_db_cnx())
    except:
        # for trac 0.8.x
        from trac.WikiFormatter import wiki_to_oneliner
        html = wiki_to_oneliner(string.join(["#%d" % c for c in items], ", "),
                                hdf, env, env.get_db_cnx())
    if html != '':
        style = string.join(["%s:%s" % (k,v) for k,v in styles.items() if v <> ""], "; ")
        return '<fieldset class="ticketbox" style="%s"><legend>%s</legend>%s</fieldset>' % \
               (style, title, html)
    else:
        return ''