"""Patient CRUD routes."""
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
from core import data_manager, google_services
from api.deps import get_current_session, require_admin_session

router = APIRouter(prefix="/api/patients", tags=["patients"])


class PatientCreate(BaseModel):
    name: str
    email: str = ""
    address: str = ""
    notes: str = ""


class PatientUpdate(BaseModel):
    name: str | None = None
    email: str | None = None
    address: str | None = None
    notes: str | None = None


def _geocode(address: str) -> tuple[float | None, float | None]:
    try:
        result = google_services.geocode_address(address)
        if result:
            return result[0], result[1]
    except Exception:
        pass
    return None, None


@router.get("")
def list_patients(session: dict = Depends(get_current_session)):
    return data_manager.get_all_patients()


@router.get("/{patient_id}")
def get_patient(patient_id: str, session: dict = Depends(get_current_session)):
    p = data_manager.get_patient_by_id(patient_id)
    if not p:
        raise HTTPException(status_code=404, detail="Patient not found")
    return p


@router.post("")
def create_patient(req: PatientCreate, session: dict = Depends(require_admin_session)):
    if not req.name:
        raise HTTPException(status_code=400, detail="Patient name is required")
    lat, lng = _geocode(req.address) if req.address else (None, None)
    patient_data = {
        "name": req.name,
        "email": req.email,
        "address": req.address,
        "notes": req.notes,
        "lat": lat,
        "lng": lng,
    }
    new_patient = data_manager.add_patient(patient_data)
    data_manager.log_action(
        session["current_user"], "ADD_PATIENT",
        f"Added patient: {req.name} ({new_patient['id']})",
    )
    return new_patient


@router.put("/{patient_id}")
def update_patient(patient_id: str, req: PatientUpdate, session: dict = Depends(require_admin_session)):
    existing = data_manager.get_patient_by_id(patient_id)
    if not existing:
        raise HTTPException(status_code=404, detail="Patient not found")
    updates: dict = {}
    if req.name is not None:
        updates["name"] = req.name
    if req.email is not None:
        updates["email"] = req.email
    if req.notes is not None:
        updates["notes"] = req.notes
    if req.address is not None:
        updates["address"] = req.address
        if req.address != existing.get("address"):
            lat, lng = _geocode(req.address) if req.address else (None, None)
            updates["lat"] = lat
            updates["lng"] = lng
    updated = data_manager.update_patient(patient_id, updates)
    data_manager.log_action(
        session["current_user"], "UPDATE_PATIENT",
        f"Updated patient: {updated['name']} ({patient_id})",
    )
    return updated


@router.delete("/{patient_id}")
def delete_patient(patient_id: str, session: dict = Depends(require_admin_session)):
    p = data_manager.get_patient_by_id(patient_id)
    if not p:
        raise HTTPException(status_code=404, detail="Patient not found")
    ok = data_manager.delete_patient(patient_id)
    if not ok:
        raise HTTPException(status_code=500, detail="Delete failed")
    data_manager.log_action(
        session["current_user"], "DELETE_PATIENT",
        f"Deleted patient: {p['name']} ({patient_id})",
    )
    return {"ok": True}