#!/usr/bin/env python3

import regex
import ssl
import http
import http.client
import hmac
import json
import socket
import threading
import logging
from time import sleep
from flask import Flask, request
from pprint import pprint
from hashlib import sha256
from phabricator import Phabricator
from launchpadlib.launchpad import Launchpad

website = "https://phab.lubuntu.me"
phab = Phabricator(host=website + "/api/", token="API KEY")
username = "lugito"
password = ""
server = "irc.freenode.net"
port = 6697
channel = "#lubuntu-devel"
lp = Launchpad.login_with("lugito", "production", "devel")
bugmessage = ("This bug has been marked as fixed in the Git repository: LINK\n"
              "The commit message is the following: COMMITMESSAGE\n\n"
              "(Note: I am only a bot. If this message was received in error, "
              "please contact my owners on the Lubuntu Team.)")
cursupportedrels = ["Cosmic", "Bionic", "Xenial", "Trusty"]

logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.DEBUG)
logger = logging.getLogger(__name__)

app = Flask(__name__)


def connecttoirc():
    global conn, username
    rawconn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    conn = ssl.wrap_socket(rawconn)
    conn.connect((server, port))
    setup = False
    usersuffix = 0
    logger.info("Connecting to IRC.")
    while not setup:
        response = conn.recv(512).decode("utf-8")
        logger.debug(response)
        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"))
            conn.send("PRIVMSG nickserv :identify {} {}\r\n".format(username, password).encode("utf-8"))

        if "You are now identified" in response:
            sleep(5)
            conn.send("JOIN {}\r\n".format(channel).encode("utf-8"))

        if "477" in response:
            sleep(5)
            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
    logger.info("Successfully connected to the IRC server.")


def isnewtask(task):
    newtask = None
    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
    logger.debug(message)
    # Sleep for a fifth of a second, so when we have a bunch of messages we have a buffer
    sleep(0.2)
    # Aaaaand, send it off!
    sendnotice(message)


def gettaskinfo(task):
    sendmessage = ""
    try:
        # We only need the task number.
        taskinfo = phab.maniphest.info(task_id=int(task.split("T")[1]))

        sendmessage = sendmessage + "\x033[\x03"

        # The color of the priority text should correspond to its value.
        color = taskinfo["priorityColor"]
        if color == "violet":
            sendmessage = sendmessage + "\x036Needs Triage"
        elif color == "pink":
            sendmessage = sendmessage + "\x035Unbreak Now!"
        elif color == "red":
            sendmessage = sendmessage + "\x034High"
        elif color == "orange":
            sendmessage = sendmessage + "\x037Medium"
        elif color == "yellow":
            sendmessage = sendmessage + "\x038Low"
        elif color == "sky":
            sendmessage = sendmessage + "\x037Wishlist"

        # Put the task status in the message.
        sendmessage = sendmessage + ", " + taskinfo["statusName"] + "\x03"

        sendmessage = sendmessage + "\x033]\x03 "

        # Put the title in there as well.
        sendmessage = sendmessage + taskinfo["title"].strip() + ": "

        # And the link.
        sendmessage = sendmessage + "\x032" + taskinfo["uri"] + "\x03"

        # Send it off!
        sendnotice(sendmessage)
    # If someone wrote something like "Tblah", obviously that's not right.
    except ValueError:
        sendnotice("\x034Error: " + task.strip() + "is an invalid task reference.\x03")
        return None


def ircbot(message, msgtype):
    if msgtype == "info":
        message = message.split(" :" + username + ": info")[1]
        for item in message.split():
            if item.startswith("T"):
                gettaskinfo(item.strip())
    elif msgtype == "link":
        for item in message.split("https://phab.lubuntu.me/"):
            if item.split()[0].strip().startswith("T"):
                gettaskinfo(item.split()[0].strip())
    else:
        sendnotice("\x034Error: unknown command.\x03")
        return None


def listenirc():
    while True:
        ircmsg = conn.recv(512)
        if len(ircmsg) == 0:
            # logger.warn is deprecated, use .warning.
            logger.warning("Connection lost, reconnecting!")
            connecttoirc()
            continue
        ircmsg = ircmsg.decode("UTF-8").strip('\n\r')
        logger.debug(ircmsg)
        if ircmsg.find("PING :") != -1:
            conn.send(bytes("PONG :pingis\n", "UTF-8"))
        elif ircmsg.find(" :" + username + ": info") != -1:
            ircbot(ircmsg, "info")
        elif ircmsg.find("https://phab.lubuntu.me/T") != -1:
            ircbot(ircmsg, "link")


@app.route("/commithook", methods=["POST"])
def commithook():
    data = request.data
    # Use hash_ instead of hash to not shadow other globals/protecteds
    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)
        logger.debug(data)

        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:
            if data["object"]["type"] == "CMIT":
                logger.debug("It's a commit!")
                commitphid = data["object"]["phid"]
                phidquery = phab.phid.query(phids=[commitphid])[commitphid]
                commitmessage = phidquery["fullName"].replace(phidquery["name"] + ": ", "")

                # When we're messing with bug importances, we need to be
                # absolutely 100% sure we aren't screwing with the rest of the bug.
                # Since there's no super clean way to get source package names,
                # we have to hardcode them.
                lpname = None
                if "rDEFAULTSETTINGS" in phidquery["name"]:
                    lpname = "lubuntu-default-settings"
                elif "rART" in phidquery["name"]:
                    lpname = "lubuntu-artwork"
                elif "rCALASETTINGS" in phidquery["name"]:
                    lpname = "calamares-settings-ubuntu"
                elif "rQTERMINALPACKAGING" in phidquery["name"]:
                    lpname = "qterminal"
                elif "rLXQTCONFIGPACKAGING" in phidquery["name"]:
                    lpname = "lxqt-config"
                elif "rNMTRAYPACKAGING" in phidquery["name"]:
                    lpname = "nm-tray"
                else:
                    logger.debug("Somehow, an unsupported repository showed up here.")

                if lpname:
                    # https://help.launchpad.net/Code/Git#Linking_to_bugs
                    regexp = regex.compile(r"lp:\s+\#\d+(?:,\s*\#\d+)*")
                    regexpsearch = regexp.search(commitmessage.lower())
                    if regexpsearch:
                        lpbugs = regexpsearch.group(0).strip("lp: ").replace("#", "")
                        for bug in lpbugs.split(", "):
                            goodtask = None
                            lbug = lp.load("/bugs/" + str(bug).strip())
                            bug = lbug
                            for task in bug.bug_tasks:
                                for rel in cursupportedrels:
                                    if lpname + " (Ubuntu " + rel + ")" in task.bug_target_display_name:
                                        goodtask = task
                                        break
                                if not goodtask:
                                    if lpname + " (Ubuntu)" in task.bug_target_display_name:
                                        goodtask = task
                            if goodtask:
                                message = bugmessage
                                message = message.replace("LINK", website + "/" + phidquery["name"])
                                message = message.replace("COMMITMESSAGE", commitmessage)
                                bug.newMessage(content=message)
                                goodtask.status = "Fix Committed"
                                goodtask.lp_save()

        return "OK"


@app.route("/irc", methods=["POST"])
def main():
    data = request.data
    # Use hash_ instead of 'hash' to not shadow externally global values/variables/protecteds
    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)
        logger.debug(data)

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

            if data["object"]["type"] == "TASK":
                logger.debug("This is a task. Checking if it's new.")
                newtask = isnewtask(search)
                if newtask:
                    logger.debug("Yes, it's a new task.")
                else:
                    logger.debug("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 (dataepoch - 10) <= datemodified <= (dataepoch + 10) and task["comments"] != []:
                            logger.debug("It's a comment, yes.")
                            comment = True
                            commentid = task["id"]
                            if datemodified != task["dateCreated"]:
                                logger.debug("The comment was edited.")
                                edited = True
                            else:
                                logger.debug("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"]

                    body = ""

                    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":
                logger.debug("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)