#!/usr/bin/env python3
"""
randomreddit.py - return a random reddit url from a subreddit's frontpage
author: andreim <andreim@andreim.net>
"""

import web
import re
import json
from tools import GrumbleError
from random import choice


def randomreddit(phenny, input):

    subreddit = input.group(2)
    if not subreddit:
        phenny.say(".random <subreddit> - get a random link from the subreddit's frontpage")
        return
        
    if not re.match('^[A-Za-z0-9_-]*$',subreddit):
        phenny.say(input.nick + ": bad subreddit format.")
        return


    url = "http://www.reddit.com/r/" + subreddit + "/.json"
    try:
        resp = web.get(url)
    except:
        try:
            resp = web.get(url)
        except:
            try:
                resp = web.get(url)
            except:
                raise GrumbleError('Reddit or subreddit unreachable.')
    
    reddit = json.loads(resp)
    post = choice(reddit['data']['children'])

    nsfw = False
    if post['data']['over_18']:
        nsfw = True
    
    if nsfw:
        phenny.reply("!!NSFW!! " + post['data']['url'] + " (" + post['data']['title'] + ") !!NSFW!!")
    else:
        phenny.reply(post['data']['url'] + " (" +  post['data']['title'] + ")")

randomreddit.commands = ['random']
randomreddit.priority = 'medium'
randomreddit.thread = False