import sys, os, time

def popen(*args):
    reader, writer = os.pipe()
    p = os.fork()
    if p == 0:
        os.close(reader)
        os.dup2(writer, 1)
        os.close(writer)
        os.execvp(args[0], args) 
        os._exit(99)
    os.close(writer)
    return os.fdopen(reader)
    
def swish(db, term):
    p = popen("/usr/local/bin/swish-e", "-x", "%p\n", "-f", db, "-w", term)
    result = []
    for line in p:
        line = line.strip()
        if line.startswith("#"): continue
        if line == ".": continue
        result.append(line)
    return result

def age(f):
    seconds = time.time() - os.stat(f).st_mtime
    if seconds < 60: return "less than a minute"
    if seconds < 120: return "1 minute"
    if seconds < 60 * 60: return "%d minutes" % ((seconds + 30)/60)
    if seconds < 7200: return "1 hour"
    if seconds < 24 * 60 * 60: return "%d hours" % ((seconds + 30*60)/60/60)
    if seconds < 2*86400: return "1 day"
    if seconds < 60 * 60: return "%d days" % ((seconds + 30*60*24)/60/60/24)
        
handle_sitemap = handle_search
def handle_search(name, query):
    search = search_text = query.get('search',u'')
    index = data_dir + u'/_swishindex'
    if not search: return handle_sitemap(name, query)

    result = []
    for name in swish(index, search_text):
        if name.startswith("./"): name = name[2:]
        sys.stderr.write("load(%r)\n" % name)
        try:
                text = load(name)
        except Error:
                result.append(u'[line ' + quote_markup(name) + ']')
        else:
                result.append(u'[line [link ' +
                              (quote_markup(name) or u'/') +
                              u'[page '+quote_markup(name)+']]]')
    if not result:
        result.append('Search found nothing, sorry.')

    result.insert(0, u'[title Search results]\n\n')
    result.insert(1, u'Searching for: [bold ' + quote_markup(search) + u']\n\n')
    result.append(u'[line Search results from swish-e, index updated ' +
                age(index) + ' ago]')
    return make_http_page(string.join(result,u''))