"""Exchange API endpoints."""

from typing import List
from fastapi import APIRouter, HTTPException
from sqlalchemy import select

from ..core.schemas import ExchangeResponse
from src.core.database import Exchange, get_database

router = APIRouter()


@router.get("/", response_model=List[ExchangeResponse])
async def list_exchanges():
    """List all exchanges."""
    try:
        db = get_database()
        async with db.get_session() as session:
            stmt = select(Exchange).order_by(Exchange.name)
            result = await session.execute(stmt)
            exchanges = result.scalars().all()
            return [ExchangeResponse.model_validate(e) for e in exchanges]
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))


@router.get("/{exchange_id}", response_model=ExchangeResponse)
async def get_exchange(exchange_id: int):
    """Get exchange by ID."""
    try:
        db = get_database()
        async with db.get_session() as session:
            stmt = select(Exchange).where(Exchange.id == exchange_id)
            result = await session.execute(stmt)
            exchange = result.scalar_one_or_none()
            if not exchange:
                raise HTTPException(status_code=404, detail="Exchange not found")
            return ExchangeResponse.model_validate(exchange)
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))