import json
import time
from datetime import datetime
import mysql.connector
from discord import Guild
from .utils import generate_dict, get_next_case_number, check_conf
from .config import config
from .logger import logger


async def connect():
    """Connects to the MySQL database, and returns a connection object."""
    conf = await check_conf(
        ["mysql_address", "mysql_database", "mysql_username", "mysql_password"]
    )

    if conf:
        raise LookupError("MySQL connection details not set properly!")

    try:
        connection = mysql.connector.connect(
            host=await config.mysql_address(),
            user=await config.mysql_username(),
            password=await config.mysql_password(),
            database=await config.mysql_database(),
        )

        return connection

    except mysql.connector.ProgrammingError as e:
        logger.error("Unable to access the MySQL database!\nError:\n%s", e.msg)
        raise ConnectionRefusedError(
            f"Unable to access the MySQL Database!\n{e.msg}"
        ) from e


async def create_guild_table(guild: Guild):
    database = await connect()
    cursor = database.cursor()

    try:
        cursor.execute(f"SELECT * FROM `moderation_{guild.id}`")
        logger.debug("MySQL Table exists for server %s (%s)", guild.name, guild.id)

    except mysql.connector.errors.ProgrammingError:
        query = f"""
            CREATE TABLE `moderation_{guild.id}` (
                moderation_id INT UNIQUE PRIMARY KEY NOT NULL,
                timestamp INT NOT NULL,
                moderation_type LONGTEXT NOT NULL,
                target_id LONGTEXT NOT NULL,
                moderator_id LONGTEXT NOT NULL,
                role_id LONGTEXT,
                duration LONGTEXT,
                end_timestamp INT,
                reason LONGTEXT,
                resolved BOOL NOT NULL,
                resolved_by LONGTEXT,
                resolve_reason LONGTEXT,
                expired BOOL NOT NULL,
                changes JSON NOT NULL,
                metadata JSON NOT NULL
            )
        """
        cursor.execute(query)

        index_query_1 = "CREATE INDEX idx_target_id ON moderation_%s(target_id(25));"
        cursor.execute(index_query_1, (guild.id,))
        index_query_2 = (
            "CREATE INDEX idx_moderator_id ON moderation_%s(moderator_id(25));"
        )
        cursor.execute(index_query_2, (guild.id,))
        index_query_3 = (
            "CREATE INDEX idx_moderation_id ON moderation_%s(moderation_id);"
        )
        cursor.execute(index_query_3, (guild.id,))

        insert_query = f"""
            INSERT INTO `moderation_{guild.id}`
            (moderation_id, timestamp, moderation_type, target_id, moderator_id, role_id, duration, end_timestamp, reason, resolved, resolved_by, resolve_reason, expired, changes, metadata)
            VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
        """
        insert_values = (
            0,
            0,
            "NULL",
            0,
            0,
            0,
            "NULL",
            0,
            "NULL",
            0,
            "NULL",
            "NULL",
            0,
            json.dumps([]), # pylint: disable=dangerous-default-value
            json.dumps({}), # pylint: disable=dangerous-default-value
        )
        cursor.execute(insert_query, insert_values)

        database.commit()

        logger.debug(
            "MySQL Table (moderation_%s) created for %s (%s)",
            guild.id,
            guild.name,
            guild.id,
        )

    database.close()


async def mysql_log(
    guild_id: str,
    author_id: str,
    moderation_type: str,
    target_id: int,
    role_id: int,
    duration,
    reason: str,
    database: mysql.connector.MySQLConnection = None,
    timestamp: int = None,
    resolved: bool = False,
    resolved_by: str = None,
    resolved_reason: str = None,
    expired: bool = None,
    changes: list = [],
    metadata: dict = {},
): # pylint: disable=dangerous-default-value
    if not timestamp:
        timestamp = int(time.time())

    if duration != "NULL":
        end_timedelta = datetime.fromtimestamp(timestamp) + duration
        end_timestamp = int(end_timedelta.timestamp())
    else:
        end_timestamp = 0

    if not expired:
        if int(time.time()) > end_timestamp:
            expired = 1
        else:
            expired = 0

    if resolved_by is None:
        resolved_by = "NULL"

    if resolved_reason is None:
        resolved_reason = "NULL"

    if not database:
        database = await connect()
        close_db = True
    else:
        close_db = False
    cursor = database.cursor()

    moderation_id = await get_next_case_number(guild_id=guild_id, cursor=cursor)

    sql = f"INSERT INTO `moderation_{guild_id}` (moderation_id, timestamp, moderation_type, target_id, moderator_id, role_id, duration, end_timestamp, reason, resolved, resolved_by, resolve_reason, expired, changes, metadata) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)"
    val = (
        moderation_id,
        timestamp,
        moderation_type,
        target_id,
        author_id,
        role_id,
        duration,
        end_timestamp,
        reason,
        int(resolved),
        resolved_by,
        resolved_reason,
        expired,
        json.dumps(changes),
        json.dumps(metadata),
    )
    cursor.execute(sql, val)

    cursor.close()
    database.commit()
    if close_db:
        database.close()

    logger.debug(
        "MySQL row inserted into moderation_%s!\n%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s",
        guild_id,
        moderation_id,
        timestamp,
        moderation_type,
        target_id,
        author_id,
        role_id,
        duration,
        end_timestamp,
        reason,
        int(resolved),
        resolved_by,
        resolved_reason,
        expired,
        changes,
        metadata,
    )

    return moderation_id


async def fetch_case(moderation_id: int, guild_id: str):
    """This method fetches a case from the database and returns the case's dictionary."""
    database = await connect()
    cursor = database.cursor()

    query = "SELECT * FROM moderation_%s WHERE moderation_id = %s;"
    cursor.execute(query, (guild_id, moderation_id))
    result = cursor.fetchone()

    cursor.close()
    database.close()

    return generate_dict(result)