from typing import List, Optional

import bcrypt
from sqlalchemy import Column, Table, ForeignKey, UniqueConstraint
from sqlalchemy.dialects.mysql import insert
from sqlalchemy.engine import Row
from sqlalchemy.sql import func, select, and_, or_
from sqlalchemy.types import TIMESTAMP, Integer, String, BIGINT, INTEGER
from datetime import datetime

from core.data.schema.base import BaseData, metadata, campaign, campaign_game

aime_user: Table = Table(
    "aime_user",
    metadata,
    Column("id", Integer, nullable=False, primary_key=True, autoincrement=True),
    Column("username", String(25), unique=True),
    Column("email", String(255), unique=True),
    Column("password", String(255)),
    Column("permissions", Integer),
    Column("created_date", TIMESTAMP, server_default=func.now()),
    Column("last_login_date", TIMESTAMP, onupdate=func.now()),
    Column("suspend_expire_time", TIMESTAMP),
    mysql_charset="utf8mb4",
)

campaign_progress: Table = Table(
    "campaign_progress",
    metadata,
    Column("id", BIGINT, nullable=False, primary_key=True, autoincrement=True),
    Column("user_id", Integer, ForeignKey("aime_user.id", ondelete="cascade", onupdate="cascade"), nullable=False),
    Column("campaign_id", INTEGER, ForeignKey("campaign.id", ondelete="cascade", onupdate="cascade"), nullable=False),
    Column("is_participating", INTEGER, nullable=False, server_default="0"),
    Column("progress", INTEGER, nullable=False, server_default="0"),
    UniqueConstraint("campaign_id", "user_id", name="campaign_progress_uk"),
    mysql_charset="utf8mb4",
)

class UserData(BaseData):
    async def create_user(
        self,
        id: Optional[int] = None,
        username: Optional[str] = None,
        email: Optional[str] = None,
        password: Optional[str] = None,
        permission: int = 1,
    ) -> Optional[int]:
        if id is None:
            sql = insert(aime_user).values(
                username=username,
                email=email,
                password=password,
                permissions=permission,
            )
        else:
            sql = insert(aime_user).values(
                id=id,
                username=username,
                email=email,
                password=password,
                permissions=permission,
            )

        conflict = sql.on_duplicate_key_update(
            username=username, email=email, password=password, permissions=permission
        )

        result = await self.execute(conflict)
        if result is None:
            return None
        return result.lastrowid

    async def get_user(self, user_id: int) -> Optional[Row]:
        sql = select(aime_user).where(aime_user.c.id == user_id)
        result = await self.execute(sql)
        if result is None:
            return False
        return result.fetchone()

    async def check_password(self, user_id: int, passwd: bytes = None) -> bool:
        usr = await self.get_user(user_id)
        if usr is None:
            return False

        if usr["password"] is None:
            return False
        
        if passwd is None or not passwd:
            return False

        return bcrypt.checkpw(passwd, usr["password"].encode())

    async def delete_user(self, user_id: int) -> None:
        sql = aime_user.delete(aime_user.c.id == user_id)

        result = await self.execute(sql)
        if result is None:
            self.logger.error(f"Failed to delete user with id {user_id}")

    async def get_unregistered_users(self) -> List[Row]:
        """
        Returns a list of users who have not registered with the webui. They may or may not have cards.
        """
        sql = select(aime_user).where(aime_user.c.password == None)

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

    async def find_user_by_email(self, email: str) -> Row:
        sql = select(aime_user).where(aime_user.c.email == email)
        result = await self.execute(sql)
        if result is None:
            return False
        return result.fetchone()

    async def find_user_by_username(self, username: str) -> List[Row]:
        sql = aime_user.select(aime_user.c.username.like(f"%{username}%"))
        result = await self.execute(sql)
        if result is None:
            return False
        return result.fetchall()

    async def change_password(self, user_id: int, new_passwd: str) -> bool:
        sql = aime_user.update(aime_user.c.id == user_id).values(password = new_passwd)

        result = await self.execute(sql)
        return result is not None

    async def change_username(self, user_id: int, new_name: str) -> bool:
        sql = aime_user.update(aime_user.c.id == user_id).values(username = new_name)

        result = await self.execute(sql)
        return result is not None

    async def get_user_by_username(self, username: str) -> Optional[Row]:
        result = await self.execute(aime_user.select(aime_user.c.username == username))
        if result: return result.fetchone()

    async def change_permission(self, user_id: int, new_perms: int) -> Optional[bool]:
        sql = aime_user.update(aime_user.c.id == user_id).values(permissions = new_perms)

        result = await self.execute(sql)
        return result is not None

    async def change_email(self, user_id: int, new_email: int) -> Optional[bool]:
        sql = aime_user.update(aime_user.c.id == user_id).values(email = new_email)

        result = await self.execute(sql)
        return result is not None

    async def get_user_campaign_progress_by_campaign(self, user_id: int, campaign_id: int) -> Optional[Row]:
        result = await self.execute(campaign_progress
            .join(campaign, campaign_progress.c.campaign_id == campaign.c.id)
            .select(and_(campaign_progress.c.user_id == user_id, campaign_progress.c.campaign_id == campaign_id)))
        
        if result is not None:
            return result.fetchone()

    async def get_user_all_campaign_progress(self, user_id: int) -> Optional[List[Row]]:
        result = await self.execute(campaign_progress
            .join(campaign, campaign_progress.c.campaign_id == campaign.c.id)
            .select(campaign_progress.c.user_id == user_id))
        
        if result is not None:
            return result.fetchall()

    async def get_user_active_campaign_progress(self, user_id: int) -> Optional[List[Row]]:
        # distrib_end_date instead of end_date to give the games time to distribute the rewards
        result = await self.execute(campaign_progress
            .join(campaign, campaign_progress.c.campaign_id == campaign.c.id)
            .select(and_(campaign_progress.c.user_id == user_id, and_(
                or_(campaign.c.start_date >= datetime.now(), campaign.c.start_date == None),
                or_(campaign.c.distrib_end_date < datetime.now(), campaign.c.distrib_end_date == None),
            ))))
        
        if result is not None:
            return result.fetchall()

    async def get_user_all_campaign_progress_by_game(self, user_id: int, game_id: str) -> Optional[List[Row]]:
        result = await self.execute(campaign_progress
            .join(campaign, campaign_progress.c.campaign_id == campaign.c.id)
            .join(campaign_game, campaign_progress.c.campaign_id == campaign_game.c.campaign_id)
            .select(and_(campaign_progress.c.user_id == user_id, campaign_game.c.game_id == game_id)))
        
        if result is not None:
            return result.fetchall()

    async def get_user_active_campaign_progress_by_game(self, user_id: int, game_id: str) -> Optional[List[Row]]:
        result = await self.execute(campaign_progress
            .join(campaign, campaign_progress.c.campaign_id == campaign.c.id)
            .join(campaign_game, campaign_progress.c.campaign_id == campaign_game.c.campaign_id)
            .select(and_(and_(campaign_progress.c.user_id == user_id, campaign_game.c.game_id == game_id), and_(
                or_(campaign.c.start_date >= datetime.now(), campaign.c.start_date == None),
                or_(campaign.c.distrib_end_date < datetime.now(), campaign.c.distrib_end_date == None),
            ))))
        
        if result is not None:
            return result.fetchall()

    async def set_user_campaign_is_participating(self, user_id: int, campaign_id: int, is_participating: bool) -> Optional[bool]:
        sql = insert(campaign_progress).values(
            user_id = user_id,
            campaign_id = campaign_id,
            is_participating = is_participating
        )

        conflict = sql.on_duplicate_key_update(is_participating = is_participating)
        result = await self.execute(conflict)
        if result is None:
            self.logger.error(f"Failed to update campaign participation status for user {user_id} on campaign {campaign_id}!")
            return None
        return result.lastrowid

    async def set_user_campaign_progress(self, user_id: int, campaign_id: int, progress: int) -> Optional[bool]:
        sql = insert(campaign_progress).values(
            user_id = user_id,
            campaign_id = campaign_id,
            is_participating = 1,
            progress = progress
        )

        conflict = sql.on_duplicate_key_update(progress = progress)
        result = await self.execute(conflict)
        if result is None:
            self.logger.error(f"Failed to update campaign progress for user {user_id} on campaign {campaign_id} to {progress}!")
            return None
        return result.lastrowid