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

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

from rollbot import RollbotConfig, Rollbot, RollbotMessage, RollbotPlugin

import plugins

# Configure loggers
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"]
    }
})

# Read bot configuration
config_dir = os.environ.get("ROLLBOT_CFG_DIR", ".")
with open(os.path.join(config_dir, "config.toml")) as infile:
    raw_config = toml.load(infile)
with open(os.path.join(config_dir, "secrets.toml")) as infile:
    raw_secrets = toml.load(infile)

auths = raw_secrets["auths"]
global_admins = auths["global"]
group_admins = auths["group"]
bots_lookup = raw_secrets["groupme_bots"]

# Define Flask app
app = Flask(__name__)
app.config["PROPAGATE_EXCEPTIONS"] = True

# Define reply logic
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)


# Create bot
config = RollbotConfig(
    plugins=RollbotPlugin.find_all_plugins(),
    db_url="sqlite:///" + os.path.abspath(raw_config["database"]),
    reply_callback=post_groupme_message,
    aliases=raw_config.get("aliases", []),
    responses=raw_config.get("responses", []),
    sleep_time=raw_config.get("sleep_time", 0.0),
    other={
        **{k: v for k, v in raw_config.items() if k not in ("database", "aliases", "responses", "sleep_time")},
        **{k: v for k, v in raw_secrets.items() if k not in ("auths", "groupme_bots")},
    },
)
rollbot = Rollbot(config, logger=app.logger)

# Init db
app.logger.info("Initializing database tables")
rollbot.init_db()
app.logger.info("Finished initializing database")

# Setup plugins
rollbot.start_plugins()
atexit.register(rollbot.shutdown_plugins)


# Routing
@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 "", 204


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