"""Daily log router (spec §3.3). Thin handlers — business logic in services/log.py."""

from datetime import date

from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session

from database import get_db
from schemas import DaySummaryResponse, LogEntryCreate, LogEntryRead, LogEntryUpdate
from services import log as svc

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


@router.get("", response_model=list[LogEntryRead])
def get_log(date: date, db: Session = Depends(get_db)):
    """All entries for a client-supplied date, ordered by sort_order then id,
    each with the referenced food embedded (§3.3)."""
    return svc.get_log_entries(db, date)


@router.post("", response_model=LogEntryRead, status_code=201)
def create_log_entry(data: LogEntryCreate, db: Session = Depends(get_db)):
    """Add a log entry. food_id must reference a non-deleted food.
    sort_order defaults to end of day. Unknown or soft-deleted food → 404."""
    try:
        return svc.create_log_entry(db, data)
    except svc.FoodNotAvailableError as e:
        raise HTTPException(status_code=404, detail=str(e))


@router.get("/summary", response_model=DaySummaryResponse)
def get_day_summary(date: date, db: Session = Depends(get_db)):
    """Computed nutrition totals for the day vs. the applicable target (§3.3)."""
    return svc.get_day_summary(db, date)


@router.put("/{entry_id}", response_model=LogEntryRead)
def update_log_entry(entry_id: int, data: LogEntryUpdate, db: Session = Depends(get_db)):
    """Update quantity, meal_slot, and/or sort_order.
    Only provided fields change; send {"meal_slot": null} to clear it."""
    result = svc.update_log_entry(db, entry_id, data)
    if result is None:
        raise HTTPException(status_code=404, detail="Log entry not found")
    return result


@router.delete("/{entry_id}")
def delete_log_entry(entry_id: int, db: Session = Depends(get_db)):
    """Hard-delete a log entry (§2.3 has no soft-delete)."""
    if not svc.delete_log_entry(db, entry_id):
        raise HTTPException(status_code=404, detail="Log entry not found")
    return {"status": "ok"}