from fastapi import APIRouter, HTTPException, Request

from app.services.planner import planner
from app.services.repository import repo
from app.services.store import JsonStore


router = APIRouter(prefix="/api/planner", tags=["planner"])
store = JsonStore()


@router.post("/generate")
async def generate_plan(request: Request):
    payload = await request.json()
    week_start = str(payload.get("week_start") or "").strip()
    if not week_start:
        raise HTTPException(status_code=400, detail="week_start is required.")
    anchors = payload.get("anchors") or []
    if isinstance(anchors, str):
        anchors = [line.strip() for line in anchors.splitlines() if line.strip()]
    target_meals = max(3, min(7, int(payload.get("target_meals") or 5)))
    plan = planner.generate(week_start=week_start, anchors=list(anchors), target_meals=target_meals)
    record = {"id": store.new_id("mealplan"), **plan, "created_at": store.now()}
    repo.create_meal_plan(record)
    return {"status": "ok", "plan": record}