"""Portfolio API endpoints."""
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from typing import Optional
from uuid import UUID

from app.database import get_db
from app.schemas.portfolio import (
    PortfolioCreate,
    PortfolioUpdate,
    PortfolioResponse,
    PortfolioListResponse
)
from app.services.rebalancing_service import PortfolioService

router = APIRouter()


@router.post("/", response_model=PortfolioResponse, status_code=status.HTTP_201_CREATED)
async def create_portfolio(
    portfolio: PortfolioCreate,
    user_id: Optional[str] = None,
    db: Session = Depends(get_db)
):
    """
    포트폴리오 생성.

    Args:
        portfolio: 포트폴리오 생성 요청
        user_id: 사용자 ID (선택)
        db: 데이터베이스 세션

    Returns:
        생성된 포트폴리오
    """
    try:
        assets_data = [
            {'ticker': asset.ticker, 'target_ratio': asset.target_ratio}
            for asset in portfolio.assets
        ]

        created_portfolio = PortfolioService.create_portfolio(
            name=portfolio.name,
            description=portfolio.description,
            assets=assets_data,
            user_id=user_id,
            db_session=db
        )

        return created_portfolio

    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"포트폴리오 생성 오류: {str(e)}"
        )


@router.get("/{portfolio_id}", response_model=PortfolioResponse)
async def get_portfolio(
    portfolio_id: UUID,
    db: Session = Depends(get_db)
):
    """
    포트폴리오 조회.

    Args:
        portfolio_id: 포트폴리오 ID
        db: 데이터베이스 세션

    Returns:
        포트폴리오
    """
    portfolio = PortfolioService.get_portfolio(portfolio_id, db)

    if not portfolio:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="포트폴리오를 찾을 수 없습니다"
        )

    return portfolio


@router.get("/", response_model=PortfolioListResponse)
async def list_portfolios(
    user_id: Optional[str] = None,
    skip: int = 0,
    limit: int = 100,
    db: Session = Depends(get_db)
):
    """
    포트폴리오 목록 조회.

    Args:
        user_id: 사용자 ID (필터)
        skip: 건너뛸 레코드 수
        limit: 최대 레코드 수
        db: 데이터베이스 세션

    Returns:
        포트폴리오 목록
    """
    result = PortfolioService.list_portfolios(db, user_id, skip, limit)
    return result


@router.put("/{portfolio_id}", response_model=PortfolioResponse)
async def update_portfolio(
    portfolio_id: UUID,
    portfolio: PortfolioUpdate,
    db: Session = Depends(get_db)
):
    """
    포트폴리오 수정.

    Args:
        portfolio_id: 포트폴리오 ID
        portfolio: 포트폴리오 수정 요청
        db: 데이터베이스 세션

    Returns:
        수정된 포트폴리오
    """
    try:
        assets_data = None
        if portfolio.assets:
            assets_data = [
                {'ticker': asset.ticker, 'target_ratio': asset.target_ratio}
                for asset in portfolio.assets
            ]

        updated_portfolio = PortfolioService.update_portfolio(
            portfolio_id=portfolio_id,
            name=portfolio.name,
            description=portfolio.description,
            assets=assets_data,
            db_session=db
        )

        if not updated_portfolio:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail="포트폴리오를 찾을 수 없습니다"
            )

        return updated_portfolio

    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=str(e)
        )
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"포트폴리오 수정 오류: {str(e)}"
        )


@router.delete("/{portfolio_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_portfolio(
    portfolio_id: UUID,
    db: Session = Depends(get_db)
):
    """
    포트폴리오 삭제.

    Args:
        portfolio_id: 포트폴리오 ID
        db: 데이터베이스 세션
    """
    success = PortfolioService.delete_portfolio(portfolio_id, db)

    if not success:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="포트폴리오를 찾을 수 없습니다"
        )