import atexit
from logging.config import dictConfig
from threading import Thread
import random

from flask import Flask, request
import requests
import requests.exceptions

from rollbot import Rollbot, RollbotMessage, RollbotPlugin

import plugins

import db
from config import BOTS_LOOKUP, get_config, get_secret

GLOBAL_ADMINS = get_secret("auths.global")
GROUP_ADMINS = get_secret("auths.group")

dictConfig({
    "version": 1,
    "formatters": {"default": {
        "format": "[%(asctime)s] %(levelname)s in %(module)s: %(message)s",
    }},
    "handlers": {"wsgi": {
        "class": "logging.StreamHandler",
        "stream": "ext://flask.logging.wsgi_errors_stream",
        "formatter": "default"
    }},
    "root": {
        "level": "INFO",
        "handlers": ["wsgi"]
    }
})

max_msg_len = 1000
split_text = "\n..."
msg_slice = max_msg_len - len(split_text)


def post_groupme_message(msg, group_id):
    bot_id = BOTS_LOOKUP[group_id]
    msgs = []
    rem = msg
    while len(rem) > max_msg_len:
        msgs.append(rem[:msg_slice] + split_text)
        rem = rem[msg_slice:]
    msgs.append(rem)
    for msg in msgs:
        try:
            requests.post(
                "https://api.groupme.com/v3/bots/post",
                json={
                    "bot_id": bot_id,
                    "text": msg
                },
                timeout=10
            )
        except requests.exceptions.Timeout as t:
            app.logger.error(f"GroupMe timed out sending {msg} as {bot_id}", exc_info=t)
        except requests.exceptions.HTTPError as h:
            app.log_exception(h)


app = Flask(__name__)
app.config["PROPAGATE_EXCEPTIONS"] = True
rollbot = Rollbot(
    logger=app.logger,
    plugin_classes=RollbotPlugin.find_all_plugins(),
    aliases=get_config("aliases"),
    responses=get_config("responses"),
    sleep_time=float(get_config("sleep_time")),
    callback=post_groupme_message,
    session_factory=db.Session
)
app.logger.info("Initializing database tables")
db.init_db()
app.logger.info("Finished initializing database")
rollbot.start_plugins()
atexit.register(rollbot.shutdown_plugins)


@app.route("/", methods=["POST"])
def execute():
    json = request.get_json()
    msg = RollbotMessage.from_groupme(json, global_admins=GLOBAL_ADMINS, group_admins=GROUP_ADMINS)
    if msg.group_id not in BOTS_LOOKUP:
        app.logger.warning(f"Received message from unknown group ID {msg.group_id}")
        return "", 400
    t = Thread(target=lambda: rollbot.handle_command(msg))
    t.start()
    return "", 204


@app.route("/health")
def health():
    return "Rollbot healthy!", 200


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=6070)