from threading import RLock
from time import time

from Powers import LOGGER
from Powers.database import MongoDB

INSERTION_LOCK = RLock()


class Blacklist(MongoDB):
    """Class to manage database for blacklists for chats."""

    # Database name to connect to to preform operations
    db_name = "blacklists"

    def __init__(self, chat_id: int) -> None:
        super().__init__(self.db_name)
        self.chat_id = chat_id
        self.chat_info = self.__ensure_in_db()

    def check_word_blacklist_status(self, word: str):
        with INSERTION_LOCK:
            bl_words = self.chat_info["triggers"]
            return word in bl_words

    def add_blacklist(self, trigger: str):
        with INSERTION_LOCK:
            if not self.check_word_blacklist_status(trigger):
                return self.update(
                    {"_id": self.chat_id},
                    {
                        "_id": self.chat_id,
                        "triggers": self.chat_info["triggers"] + [trigger],
                    },
                )

    def remove_blacklist(self, trigger: str):
        with INSERTION_LOCK:
            if self.check_word_blacklist_status(trigger):
                self.chat_info["triggers"].remove(trigger)
                return self.update(
                    {"_id": self.chat_id},
                    {
                        "_id": self.chat_id,
                        "triggers": self.chat_info["triggers"],
                    },
                )

    def get_blacklists(self):
        with INSERTION_LOCK:
            return self.chat_info["triggers"]

    @staticmethod
    def count_blacklists_all():
        with INSERTION_LOCK:
            collection = MongoDB(Blacklist.db_name)
            curr = collection.find_all()
            return sum(len(chat["triggers"]) for chat in curr)

    @staticmethod
    def count_blackists_chats():
        with INSERTION_LOCK:
            collection = MongoDB(Blacklist.db_name)
            curr = collection.find_all()
            return sum(bool(chat["triggers"])
                       for chat in curr)

    def set_action(self, action: str):
        with INSERTION_LOCK:
            return self.update(
                {"_id": self.chat_id},
                {"_id": self.chat_id, "action": action},
            )

    def get_action(self):
        with INSERTION_LOCK:
            return self.chat_info["action"]

    def set_reason(self, reason: str):
        with INSERTION_LOCK:
            return self.update(
                {"_id": self.chat_id},
                {"_id": self.chat_id, "reason": reason},
            )

    def get_reason(self):
        with INSERTION_LOCK:
            return self.chat_info["reason"]

    @staticmethod
    def count_action_bl_all(action: str):
        with INSERTION_LOCK:
            collection = MongoDB(Blacklist.db_name)
            all_data = collection.find_all({"action": action})
            return sum(len(i["triggers"]) >= 1 for i in all_data)

    def rm_all_blacklist(self):
        with INSERTION_LOCK:
            return self.update(
                {"_id": self.chat_id},
                {"triggers": []},
            )

    def __ensure_in_db(self):
        chat_data = self.find_one({"_id": self.chat_id})
        if not chat_data:
            new_data = new_data = {
                "_id": self.chat_id,
                "triggers": [],
                "action": "none",
                "reason": "Automated blacklisted word: {{}}",
            }
            self.insert_one(new_data)
            return new_data
        return chat_data

    def clean_blacklist(self):
        with INSERTION_LOCK:
            return self.delete_one({"_id": self.chat_id})

    # Migrate if chat id changes!
    def migrate_chat(self, new_chat_id: int):
        old_chat_db = self.find_one({"_id": self.chat_id})
        new_data = old_chat_db.update({"_id": new_chat_id})
        self.insert_one(new_data)
        self.delete_one({"_id": self.chat_id})

    @staticmethod
    def repair_db(collection):
        all_data = collection.find_all()
        keys = {
            "triggers": [],
            "action": "none",
            "reason": "Automated blacklisted word: {{}}",
        }
        for data in all_data:
            for key, val in keys.items():
                try:
                    _ = data[key]
                except KeyError:
                    LOGGER.warning(
                        f"Repairing Blacklist Database - setting '{key}:{val}' for {data['_id']}",
                    )
                    collection.update({"_id": data["_id"]}, {key: val})


def __pre_req_blacklists():
    start = time()
    LOGGER.info("Starting Blacklists Database Repair...")
    collection = MongoDB(Blacklist.db_name)
    Blacklist.repair_db(collection)
    LOGGER.info(f"Done in {round((time() - start), 3)}s!")