from typing import Dict, List, Optional
from sqlalchemy import Table, Column, UniqueConstraint, PrimaryKeyConstraint, and_, update
from sqlalchemy.types import Integer, String, TIMESTAMP, Boolean, JSON, BigInteger
from sqlalchemy.engine.base import Connection
from sqlalchemy.schema import ForeignKey
from sqlalchemy.sql import func, select
from sqlalchemy.engine import Row
from sqlalchemy.dialects.mysql import insert

from core.data.schema import BaseData, metadata
from core.config import CoreConfig
import datetime

round_details = Table(
    "idac_round_info",
    metadata,
    Column("id", Integer, primary_key=True, nullable=False),
    Column("round_id_in_json", Integer),
    Column("name", String(64)),
    Column("season", Integer),
    Column("start_dt", TIMESTAMP, server_default=func.now()),
    Column("end_dt", TIMESTAMP, server_default=func.now()),
    mysql_charset="utf8mb4",
)

round_info = Table(
    "idac_user_round_info",
    metadata,
    Column("id", Integer, primary_key=True, nullable=False),
    Column("user", ForeignKey("aime_user.id", ondelete="cascade", onupdate="cascade")),
    Column("round_id", ForeignKey("idac_round_info.id", ondelete="cascade", onupdate="cascade")),
    Column("count", Integer),
    Column("win", Integer),
    Column("point", Integer),
    Column("play_dt", TIMESTAMP, server_default=func.now()),
    UniqueConstraint("user", "round_id", name="idac_user_round_info_uk"),
    mysql_charset="utf8mb4",
)

class IDACOnlineRounds(BaseData):
    # get player's ranking from a specified round event
    async def get_round_rank_by_id(self, aime_id: int, round_event_id: int) -> Optional[Row]:
        subquery = (
            select([func.group_concat(func.concat(round_info.c.user, '|', round_info.c.point),order_by=[round_info.c.point.desc(), round_info.c.play_dt])])
            .select_from(round_info)
            .where(round_info.c.round_id == round_event_id)
            .as_scalar()
        )

        sql = (
            select([func.find_in_set(func.concat(round_info.c.user, '|', round_info.c.point), subquery.label('rank'))])
            .select_from(round_info)
            .where(
                and_(
                    round_info.c.user == aime_id,
                    round_info.c.round_id == round_event_id
                )
            )
        )

        result = await self.execute(sql)
        if result is None:
            return None
        return result.fetchone()

        
    # get player's info from a specified round event
    async def get_round_info_by_id(self, aime_id: int, round_event_id: int) -> Optional[Row]:
        sql = select(round_info).where(
            and_(
                round_info.c.user == aime_id,
                round_info.c.round_id == round_event_id
            )
        )

        result = await self.execute(sql)
        if result is None:
            return None
        return result.fetchone()

    # get top 5 of a specified round event
    async def get_round_top_five(self, round_event_id: int) -> Optional[Row]:
        subquery = (
            select([func.group_concat(func.concat(round_info.c.user, '|', round_info.c.point),order_by=[round_info.c.point.desc(), round_info.c.play_dt])])
            .select_from(round_info)
            .where(round_info.c.round_id == round_event_id)
            .as_scalar()
        )

        sql = (
            select([func.find_in_set(func.concat(round_info.c.user, '|', round_info.c.point), subquery.label('rank'))], round_info.c.user)
            .select_from(round_info)
            .where(round_info.c.round_id == round_event_id)
            .limit(5)
        )

        result = await self.execute(sql)
        if result is None:
            return None
        return result.fetchall()

    # save players info to a specified round event
    async def put_round_event(
        self, aime_id: int, round_id: int, round_data: Dict
    ) -> Optional[int]:
        round_data["user"] = aime_id
        round_data["round_id"] = round_id

        sql = insert(round_info).values(**round_data)
        conflict = sql.on_duplicate_key_update(**round_data)
        result = await self.execute(conflict)

        if result is None:
            self.logger.warn(f"putround: Failed to update! aime_id: {aime_id}")
            return None
        return result.lastrowid

    # insert if the event does not exist in database
    async def _try_load_round_event(
        self, round_id: int, version: int, round_data: Dict
    ) -> Optional[int]:
        
        sql = select(round_details).where(
            round_details.c.round_id_in_json == round_id
        )
        result = await self.execute(sql)
        rid = result.fetchone()

        if rid is None:
            tmp = {}
            tmp["round_id_in_json"] = round_id
            tmp["name"] = round_data["round_event_nm"]
            tmp["season"] = version
            tmp["start_dt"] = datetime.datetime.fromtimestamp(round_data["start_dt"])
            tmp["end_dt"] = datetime.datetime.fromtimestamp(round_data["end_dt"])
            
            sql = insert(round_details).values(**tmp)
            result = await self.execute(sql)

            return result.lastrowid
        return rid["id"]

    # TODO: get top five players of last round event for Boot/GetConfigData