from ingredients.db import Ingredient, find_ingredients_by_meal_id, find_ingredients_by_recipe_id, insert_ingredient

import units
from products import Product, find_product_by_tag

from ingredient_parser import parse_multiple_ingredients
from typing import List

def parse_ingredient_from_nlp(ingredients: List[str]) -> Ingredient:
    results = []
    for ingredient in parse_multiple_ingredients(ingredients):
        name = ingredient.name.text if ingredient.name else ''

        quantity, unit = None, None
        for amount in ingredient.amount:
            if quantity is None and amount.quantity:
                quantity = amount.quantity

            if unit is None and amount.unit:
                real_unit = units.get_unit(amount.unit)
                if real_unit:
                    unit = real_unit.name

        if isinstance(quantity, str):
            try:
                quantity = float(quantity)
            except ValueError:
                pass

        if quantity is None or not isinstance(quantity, (int, float)):
            quantity = 1

        if unit is None:
            unit = units.ITEMS.name
            
        results.append(Ingredient(id=0,
            line=ingredient.sentence,
            name=name,
            quantity=quantity,
            unit=unit,
            preparation=ingredient.preparation.text if ingredient.preparation else '',
            product_id=0
        ))
    
    return results

async def _find_existing_product(conn, ingredient: str) -> Product:
    async for item in find_product_by_tag(conn, ingredient):
        return item
    return None

async def match_existing_products(conn, ingredients: List[Ingredient]) -> List[Ingredient]:
    for ingredient in ingredients:
        if not ingredient.product:
            existing = await _find_existing_product(conn, ingredient.name)
            if existing:
                ingredient.product_id = existing.id
                ingredient.product = existing

    return ingredients