from datetime import datetime

from sqlalchemy import Column, DateTime, Float, Integer, String
from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
from sqlalchemy.orm import DeclarativeBase, sessionmaker

from app.core.config import settings

async_engine = create_async_engine(settings.DATABASE_URL, echo=False)
async_session = sessionmaker(async_engine, class_=AsyncSession, expire_on_commit=False)


class Base(DeclarativeBase):
    pass


class OrderModel(Base):
    __tablename__ = "orders"

    order_id = Column(String, primary_key=True)
    symbol = Column(String, nullable=False, index=True)
    side = Column(String, nullable=False)
    order_type = Column(String, nullable=False)
    quantity = Column(Integer, nullable=False)
    filled_quantity = Column(Integer, default=0)
    price = Column(Float, nullable=True)
    avg_price = Column(Float, default=0.0)
    status = Column(String, nullable=False)
    strategy_id = Column(String, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)


class TradeModel(Base):
    __tablename__ = "trades"

    trade_id = Column(String, primary_key=True)
    order_id = Column(String, nullable=False, index=True)
    symbol = Column(String, nullable=False, index=True)
    side = Column(String, nullable=False)
    quantity = Column(Integer, nullable=False)
    price = Column(Float, nullable=False)
    pnl = Column(Float, default=0.0)
    strategy_id = Column(String, nullable=True)
    timestamp = Column(DateTime, default=datetime.utcnow)


class KlineModel(Base):
    __tablename__ = "klines"

    id = Column(Integer, primary_key=True, autoincrement=True)
    symbol = Column(String, nullable=False, index=True)
    interval = Column(String, nullable=False)
    open = Column(Float, nullable=False)
    high = Column(Float, nullable=False)
    low = Column(Float, nullable=False)
    close = Column(Float, nullable=False)
    volume = Column(Integer, nullable=False)
    timestamp = Column(DateTime, nullable=False)


async def init_db():
    async with async_engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)


async def get_session() -> AsyncSession:
    async with async_session() as session:
        yield session