from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from typing import List

from database import get_db
from models.product import Product, Category, ProductOption, ProductIngredient
from models.user import User
from schemas.product import (
    ProductCreate, ProductUpdate, ProductOut,
    CategoryCreate, CategoryUpdate, CategoryOut,
)
from routers.deps import get_current_user, require_manager

router = APIRouter()


# ── Categories ───────────────────────────────────────────────────────────────

@router.get("/categories", response_model=List[CategoryOut])
def list_categories(db: Session = Depends(get_db), user: User = Depends(get_current_user)):
    return db.query(Category).order_by(Category.sort_order).all()


@router.post("/categories", response_model=CategoryOut, status_code=status.HTTP_201_CREATED)
def create_category(body: CategoryCreate, db: Session = Depends(get_db), user: User = Depends(require_manager)):
    cat = Category(**body.model_dump())
    db.add(cat)
    db.commit()
    db.refresh(cat)
    return cat


@router.put("/categories/{category_id}", response_model=CategoryOut)
def update_category(category_id: int, body: CategoryUpdate, db: Session = Depends(get_db), user: User = Depends(require_manager)):
    cat = db.query(Category).filter(Category.id == category_id).first()
    if not cat:
        raise HTTPException(status_code=404, detail="Category not found")
    for field, value in body.model_dump(exclude_none=True).items():
        setattr(cat, field, value)
    db.commit()
    db.refresh(cat)
    return cat


@router.delete("/categories/{category_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_category(category_id: int, db: Session = Depends(get_db), user: User = Depends(require_manager)):
    cat = db.query(Category).filter(Category.id == category_id).first()
    if not cat:
        raise HTTPException(status_code=404, detail="Category not found")
    db.delete(cat)
    db.commit()


# ── Products ──────────────────────────────────────────────────────────────────

@router.get("/", response_model=List[ProductOut])
def list_products(db: Session = Depends(get_db), user: User = Depends(get_current_user)):
    return db.query(Product).filter(Product.is_available == True).all()


@router.post("/", response_model=ProductOut, status_code=status.HTTP_201_CREATED)
def create_product(body: ProductCreate, db: Session = Depends(get_db), user: User = Depends(require_manager)):
    data = body.model_dump(exclude={"options", "ingredients"})
    product = Product(**data)
    db.add(product)
    db.flush()
    for opt in body.options:
        db.add(ProductOption(product_id=product.id, **opt.model_dump()))
    for ing in body.ingredients:
        db.add(ProductIngredient(product_id=product.id, **ing.model_dump()))
    db.commit()
    db.refresh(product)
    return product


@router.put("/{product_id}", response_model=ProductOut)
def update_product(product_id: int, body: ProductUpdate, db: Session = Depends(get_db), user: User = Depends(require_manager)):
    product = db.query(Product).filter(Product.id == product_id).first()
    if not product:
        raise HTTPException(status_code=404, detail="Product not found")
    for field, value in body.model_dump(exclude_none=True).items():
        setattr(product, field, value)
    db.commit()
    db.refresh(product)
    return product


@router.delete("/{product_id}", status_code=status.HTTP_204_NO_CONTENT)
def deactivate_product(product_id: int, db: Session = Depends(get_db), user: User = Depends(require_manager)):
    product = db.query(Product).filter(Product.id == product_id).first()
    if not product:
        raise HTTPException(status_code=404, detail="Product not found")
    product.is_available = False
    db.commit()