#!/usr/bin/env python3

import http
import hmac
import json
import socket
import threading
from flask import Flask, request
from pprint import pprint
from hashlib import sha256
from phabricator import Phabricator

website = "https://phab.lubuntu.me"

phab = Phabricator(host=website+"/api/", token="API KEY")

app = Flask(__name__)

global username
username = "lugito"
server = "irc.freenode.net"
port = 6667
channel = "#lubuntu-devel"

def connecttoirc():
    global conn, username
    conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    conn.connect((server, port))
    setup = False
    usersuffix = 0
    while setup == False:
        response = conn.recv(512).decode("utf-8")
        if "No Ident response" in response:
            conn.send("NICK {}\r\n".format(username).encode("utf-8"))
            conn.send("USER {} * * :{}\r\n".format(username, username).encode("utf-8"))

        if "376" in response:
            conn.send("JOIN {}\r\n".format(channel).encode("utf-8"))

        if "433" in response:
            usersuffix = usersuffix + 1
            username = username + str(usersuffix)
            conn.send("NICK {}\r\n".format(username).encode("utf-8"))
            conn.send("USER {} * * :{}\r\n".format(username, username).encode("utf-8"))

        if "PING" in response:
            conn.send("PONG :{}\r\n".format(response.split(":")[1]).encode("utf-8"))

        if "366" in response:
            setup = True

def isnewtask(task):
    modified = None
    for data in task:
        if modified:
            if data["dateCreated"] == data["dateModified"] and data["dateCreated"] == modified:
                modified = data["dateCreated"]
                newtask = True
            else:
                newtask = False
                break
        else:
            modified = data["dateCreated"]

    return newtask

def sendnotice(message):
    conn.send("NOTICE {} :{}\r\n".format(channel, message).encode("utf-8"))

def ircmessage(objectstr, who, body, link):
    # e.g. [T31: Better IRC integration]
    message = "\x033[\x03\x0313" + objectstr + "\x03\x033]\x03 "
    # e.g. tsimonq2 (Simon Quigley)
    message = message + "\x0315" + who + "\x03 "
    # e.g. commented on the task:
    message = message + body + ": "
    # e.g. https://phab.lubuntu.me/T40#779
    message = message + "\x032" + link + "\x03"
    # Make sure we can debug this if it goes haywire
    print(message)
    # Aaaaand, send it off!
    sendnotice(message)

def listenirc():
    while 1:
        ircmsg = conn.recv(512)
        if len(ircmsg) == 0:
            print("Connection lost, reconnecting!")
            connecttoirc()
            continue
        ircmsg = ircmsg.decode("UTF-8").strip('\n\r')
        print(ircmsg)
        if ircmsg.find("PING :") != -1:
            conn.send(bytes("PONG :pingis\n", "UTF-8"))

@app.route("/", methods=["POST"])
def main():
    data = request.data
    hash = hmac.new(bytes(u"HMAC KEY", "utf-8"), data, sha256)
    # We MUST ensure that the request came from Phab.
    if hash.hexdigest() == request.headers["X-Phabricator-Webhook-Signature"]:
        data = json.loads(data)
        print(data)
        print

        exists = True
        try:
            # Try to find the object.
            search = phab.transaction.search(objectIdentifier=data["object"]["phid"])["data"]
            # Find the author too.
            userlookup = search[0]["authorPHID"]
            who = str(dict(phab.phid.query(phids=[userlookup]))[userlookup]["fullName"])
        # If the object exists, no worries, let's just return a good response.
        except http.client.HTTPException:
            exists = False

        if exists:
            print("Object exists, checking to see if it's a task or a commit.")

            if data["object"]["type"] == "TASK":
                print("This is a task. Checking if it's new.")
                newtask = isnewtask(search)
                if newtask:
                    print("Yes, it's a new task.")
                else:
                    print("No, it's not a new task.")

                # If it's not a new task, let's see if it's a comment, and if it's just an edit.
                comment = None
                commentid = None
                edited = None
                if not newtask:
                    commentid = None
                    edited = False
                    for task in search:
                        dataepoch = data["action"]["epoch"]
                        datemodified = task["dateModified"]
                        # All comments within ten seconds of the request are fair game.
                        if datemodified >= (dataepoch - 10) and datemodified <= (dataepoch + 10) and task["comments"] != []:
                            print("It's a comment, yes.")
                            comment = True
                            commentid = task["id"]
                            if datemodified != task["dateCreated"]:
                                print("The comment was edited.")
                                edited = True
                            else:
                                print("The comment was NOT edited.")
                                edited = False
                            break
                        else:
                            comment = False

                if comment or edited or newtask:
                    objectstr = phab.phid.query(phids=[data["object"]["phid"]])[data["object"]["phid"]]["fullName"]

                    if comment:
                        body = "commented on the task"
                    elif edited:
                        body = "edited a message on the task"
                    elif newtask:
                        body = "just created this task"

                    # Assuming this is a comment, there should always be a URI associated with it.
                    link = phab.phid.query(phids=[data["object"]["phid"]])[data["object"]["phid"]]["uri"]

                    # Even though this can be off sometimes, let's include the comment ID in the link too.
                    # FIXME: Make this more accurate, and figure out why it's inaccurate at times.
                    if commentid:
                        link = link + "#" + str(commentid)

                    ircmessage(objectstr, who, body, link)

            elif data["object"]["type"] == "CMIT":
                print("It's a commit!")
                commitphid = data["object"]["phid"]

                objectstr = phab.phid.query(phids=[commitphid])[commitphid]["fullName"]

                body = "committed"

                # The URI for this one is waaaaaaay too long. Let's assemble it ourselves.
                link = website + "/" + phab.phid.query(phids=[commitphid])[commitphid]["name"]

                ircmessage(objectstr, who, body, link)

        return "OK"

if __name__ == "__main__":
    connecttoirc()
    t = threading.Thread(target=listenirc)
    t.daemon = True
    t.start()
    app.run(host="0.0.0.0", port=5000)