from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from ..database import get_db
from .. import models
from typing import List
from pydantic import BaseModel
from datetime import datetime

router = APIRouter()

class VisitCreate(BaseModel):
    provider_id: int
    client_id: int
    start_time: str | None = None
    duration_minutes: int

class VisitOut(VisitCreate):
    id: int

    class Config:
        orm_mode = True

@router.post("/", response_model=VisitOut, status_code=status.HTTP_201_CREATED)
def create_visit(visit: VisitCreate, db: Session = Depends(get_db)):
    # Convert ISO string to datetime
    start_dt = datetime.fromisoformat(visit.start_time) if visit.start_time else None
    db_visit = models.Visit(
        provider_id=visit.provider_id,
        client_id=visit.client_id,
        start_time=start_dt,
        duration_minutes=visit.duration_minutes,
    )
    db.add(db_visit)
    try:
        db.commit()
        db.refresh(db_visit)
    except Exception as e:
        db.rollback()
        raise HTTPException(status_code=400, detail=str(e))
    return db_visit

@router.get("/", response_model=List[VisitOut])
def list_visits(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
    visits = db.query(models.Visit).offset(skip).limit(limit).all()
    return visits

@router.get("/{visit_id}", response_model=VisitOut)
def get_visit(visit_id: int, db: Session = Depends(get_db)):
    visit = db.query(models.Visit).filter(models.Visit.id == visit_id).first()
    if not visit:
        raise HTTPException(status_code=404, detail="Visit not found")
    return visit