import sqlite3
import product, recipe, db

from pydantic import BaseModel
from typing import List, Annotated
from fastapi import FastAPI, Depends, Query
from fastapi.responses import JSONResponse
from fastapi.middleware.cors import CORSMiddleware

app = FastAPI()

# Add CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"]
)

# Dependency to create SQLite connection
async def get_db():
    sql_db = await db.connect()
    try:
        yield sql_db
    finally:
        await sql_db.close()

@app.get("/recipes/parse")
async def parse_recipe_handler(url: str, conn: sqlite3.Connection = Depends(get_db)) -> recipe.Recipe:
    parsed = await recipe.parse_recipe(conn, url)
    if not parsed:
        return JSONResponse(status_code=400, content={'message': 'Recipe not found'})
    return parsed

@app.get("/recipes/ingredients/parse")
async def parse_ingredients(lines: Annotated[
            List[str], 
            Query(alias="ingredients",
                title="Array of ingredients to parse")], 
        conn: sqlite3.Connection = Depends(get_db)) -> List[recipe.Ingredient]:
    ingredients = recipe.parse_ingredient_from_nlp(lines)
    recipe.match_existing_products(conn, ingredients)
    return ingredients

class ProductUrl(BaseModel):
    url: str
    tags: List[str] = []

@app.post("/products/")
async def create_product(url: ProductUrl, conn: sqlite3.Connection = Depends(get_db)) -> product.Product:
    return await product.get_or_create(conn, url.url, url.tags)

@app.get("/recipes/{recipe_id}")
async def get_recipe(recipe_id: int, conn: sqlite3.Connection = Depends(get_db)) -> recipe.Recipe:
    r = await recipe.find_recipe_by_id(conn, recipe_id)
    if not r:
        return JSONResponse(status_code=404, content={'message': 'Recipe not found'})

    r.ingredients = []
    async for ingredient in recipe.find_ingredients_by_recipe_id(conn, recipe_id):
        ingredient.product = await product.find_product_by_id(conn, ingredient.product_id)
        r.ingredients.append(ingredient)
    
    return r

@app.post('/recipes/')
async def create_recipe(item: recipe.Recipe, conn: sqlite3.Connection = Depends(get_db)) -> recipe.Recipe:
    if not item.ingredients:
        return JSONResponse(status_code=400, content={'message': 'Recipe must have at least one ingredient'})
    
    for ingredient in item.ingredients:
        if not ingredient.product:
            return JSONResponse(status_code=400, content={'message': 'Ingredient must have a product'})
    
    await recipe.insert_recipe(conn, item)
    for ingredient in item.ingredients:
        ingredient.recipe_id = item.id
        ingredient.product_id = ingredient.product.id
        await recipe.insert_ingredient(conn, ingredient)
    await conn.commit()
    
    return item