import codecs
import html
import os.path
import random
import textwrap
import string
import urllib

from escpos import printer
import facebook
import PIL
import requests
import twitter

from bureau import Bureau, add_command, add_api

class TWrapper():
    pass

class PublicRelations(Bureau):
    """
    The Public relations department manages the flow of information between
    the screenless office and the general public.  It provides interfaces
    for Twitter, Facebook and other electronic PR platforms.
    """

    name = "Public Relations"
    prefix = "PR"
    version = 0

    def __init__(self):
        Bureau.__init__(self)

        CK = codecs.decode("neV4HPasZrXMjNaliWWVUIaHA",
                           "rot13")
        CS = codecs.decode("ntegmiu3rdFAyMczCWM0bgpydFHwYXV3WedhtPCec1Pu9qdfGy",
                           "rot13")


        TW_CREDS = os.path.expanduser('~/.screenless/tw_creds')
        if not os.path.exists(TW_CREDS):
            twitter.oauth_dance("The Screenless Office", CK, CS,
                                TW_CREDS)

        oauth_token, oauth_secret = twitter.read_token_file(TW_CREDS)

        self.t = TWrapper()
        self.auth = twitter.OAuth(oauth_token, oauth_secret, CK, CS)
        self.t.t = twitter.Twitter(auth=self.auth)

        # setup DBs to map short codes to tweet ids
        self.tweetdb = self.dbenv.open_db(b"tweetdb")

    def get_tweet_id(self, tweet_hash):
        """
        take a short code and look up the tweet id
        """
        with self.dbenv.begin(db=self.tweetdb) as txn:
            tweetid = txn.get(tweet_hash.encode())
            return int(tweetid)

    def short_tweet_id(self, tweet_id):
        """
        take a tweet id and return a short alphanumeric code
        """
        shortcode = ''.join(random.choice(string.ascii_letters + string.digits)
                            for _ in range(5))
        with self.dbenv.begin(db=self.tweetdb, write=True) as txn:
            txn.put(shortcode.encode(), tweet_id.encode())
        return shortcode

    @add_command("tweetpic", "Post a Document Camera Image to Twitter")
    def tweet_pic(self):
        """
        Takes a photograph using the document camera and posts it to Twitter.
        """
        photo = self.send("PX", "photo")["photo"]

        with open(photo, "rb") as imagefile:
            imagedata = imagefile.read()
        t_up = twitter.Twitter(domain='upload.twitter.com', auth=self.auth)

        id_img1 = t_up.media.upload(media=imagedata)["media_id_string"]
        self.t.t.statuses.update(status="#screenless", media_ids=id_img1)

    @add_command("fbpost", "Post to Facebook")
    def post_fb(self):
        """
        Takes a photograph using the document camera and posts it to Facebook.
        """
        photo = self.send("PX", "photo")["photo"]

        access_token = 'EAADixisn70ABADh2rEMZAYA8nGzd6ah8RFZA3URba263aCQ63ajLeTiZC5sgZCyIVSmRZBWReVsO9IuaLibX5RjW9Ja2tTZAbxgrDr1dPJzyGwcGTSV9bW1W4NigN0d9dFIH35W2fZBOkhvuLqOCDCBacIPjXPMxF7DRGyrz5lVHxTc04OlBeRX'
        page_id = "screenless"
        graph = facebook.GraphAPI(access_token)
        #graph.put_object(parent_object=page_id, connection_name='feed',
        #                 message='testing screenless post')
        print("uploading photo " + photo)
        graph.put_photo(image=open(photo, 'rb'), album_path=page_id + "/photos",
                        message='#screenless')
        #files = {"file": ("cam.jpg", open(photo, 'rb'))}
        #args = {}
        #args["access_token"] = access_token
        #args["caption"] = "test cam"
        #resp = requests.post(facebook.FACEBOOK_GRAPH_URL + graph.version + "/"\
        #                     + "me" + "/photos",
        #                     files=files,
        #                     params=args,
        #                     timeout=graph.timeout,
        #                     proxies=graph.proxies)
        #print(resp.json())

    @add_command("twtimeline", "Print Recent Tweets")
    def tw_timeline(self, data=None):
        """
        Print some recent tweets from your home timeline.  Default is 10.
        """
        if data:
            try:
                count = data["count"]
            except KeyError as err:
                print("You need to specify how many tweets you want!")
        else:
            count = 10

        prn = printer.Usb(0x416, 0x5011, in_ep=0x81, out_ep=0x03)
        prn.codepage = "cp437"

        # TODO: add fancier formatting i.e. inverted text for username/handle
        tweets = self.t.t.statuses.home_timeline(count=count)
        out = ""
        for t in tweets:
            prn.set(text_type="U")
            username = t["user"]["name"].encode("cp437", "ignore")
            prn._raw(username)
            prn.text("\r\n")
            prn.set(text_type="NORMAL")
            twtext = html.unescape(t["text"])
            t_wrapped = textwrap.fill(twtext, width=48) + "\r\n"
            t_enc = t_wrapped.encode("cp437", "ignore")
            prn._raw(t_enc)

            if "media" in t["entities"]:
                if len(t["entities"]["media"]) > 0:
                    i_url = t["entities"]["media"][0]["media_url"]
                    filename = i_url.rsplit('/',1)[1]
                    filename = "/tmp/" + filename
                    print("fetching", i_url, filename)
                    urllib.request.urlretrieve(i_url, filename)
                    im = PIL.Image.open(filename)
                    if im.mode in ("L", "RGB", "P"):
                        im = PIL.ImageOps.equalize(im)
                    im.thumbnail((576, 576), PIL.Image.ANTIALIAS)
                    prn.image(im, impl="bitImageColumn")

            tw_shortcode = self.short_tweet_id(t["id_str"])
            prn.barcode("PRtwd." + tw_shortcode, "CODE128", function_type="B")
            prn.text("\r\n\r\n")

        prn.cut()

    @add_command("twd", "Print Tweet Details")
    def tw_details(self, data):
        """
        Print detailed tweet info and commands for reply, like, retweet, etc.
        """
        tweet_id = self.get_tweet_id(data)
        tweet = self.t.t.statuses.show(id=tweet_id)

        # TODO: print tweet details
        pass

    @add_command("twrt", "Re-Tweet")
    def tw_retweet(self, data):
        """
        Re-Tweet a tweet from someone else.
        """
        tweet_id = self.get_tweet_id(data)
        self.t.t.statuses.retweet(id=tweet_id)
        return

    @add_command("twre", "Reply to Tweet")
    def tw_reply(self, data):
        """
        Reply to a tweet.
        """
        # TODO: look up tweet id
        #self.t.t.statuses.update(status="@AUTHOR_ID", media_ids=id_img1)
        return

    @add_command("twlk", "Like a Tweet")
    def tw_like(self, data):
        """
        'Like' a tweet.
        """
        tweet_id = self.get_tweet_id(data)
        self.t.t.favorites.create(id=tweet_id)
        return

           
def main():
    pr = PublicRelations()
    pr.run()


if __name__ == "__main__":
    main()