import random
from typing import List, Optional

from fastapi import FastAPI, HTTPException, Query
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
import os

import uvicorn

from db_utils import (
    list_recipes_db,
    create_recipe_db,
    get_recipes_by_filters_db,
    update_recipe_db,
    delete_recipe_db,
)


class RecipeBase(BaseModel):
    name: str
    meal_type: str          # breakfast / lunch / dinner / snack
    time_minutes: int
    tags: List[str] = []
    ingredients: List[str] = []
    steps: List[str] = []


class RecipeCreate(RecipeBase):
    pass


class Recipe(RecipeBase):
    id: int

    
class RecipeUpdate(RecipeBase):
    pass



app = FastAPI(
    title="Random Recipes API",
    description="API פשוט לבחירת מתכונים לצהריים / ערב / כל ארוחה 😋",
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:5173", "http://localhost:3000"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.get("/recipes", response_model=List[Recipe])
def list_recipes():
    rows = list_recipes_db()
    recipes = [
        Recipe(
            id=r["id"],
            name=r["name"],
            meal_type=r["meal_type"],
            time_minutes=r["time_minutes"],
            tags=r["tags"] or [],
            ingredients=r["ingredients"] or [],
            steps=r["steps"] or [],
        )
        for r in rows
    ]
    return recipes


@app.post("/recipes", response_model=Recipe, status_code=201)
def create_recipe(recipe_in: RecipeCreate):
    data = recipe_in.dict()
    data["meal_type"] = data["meal_type"].lower()

    row = create_recipe_db(data)

    return Recipe(
        id=row["id"],
        name=row["name"],
        meal_type=row["meal_type"],
        time_minutes=row["time_minutes"],
        tags=row["tags"] or [],
        ingredients=row["ingredients"] or [],
        steps=row["steps"] or [],
    )

@app.put("/recipes/{recipe_id}", response_model=Recipe)
def update_recipe(recipe_id: int, recipe_in: RecipeUpdate):
    data = recipe_in.dict()
    data["meal_type"] = data["meal_type"].lower()

    row = update_recipe_db(recipe_id, data)
    if not row:
        raise HTTPException(status_code=404, detail="המתכון לא נמצא")

    return Recipe(
        id=row["id"],
        name=row["name"],
        meal_type=row["meal_type"],
        time_minutes=row["time_minutes"],
        tags=row["tags"] or [],
        ingredients=row["ingredients"] or [],
        steps=row["steps"] or [],
    )


@app.delete("/recipes/{recipe_id}", status_code=204)
def delete_recipe(recipe_id: int):
    deleted = delete_recipe_db(recipe_id)
    if not deleted:
        raise HTTPException(status_code=404, detail="המתכון לא נמצא")
    return


@app.get("/recipes/random", response_model=Recipe)
def random_recipe(
    meal_type: Optional[str] = None,
    max_time: Optional[int] = None,
    ingredients: Optional[List[str]] = Query(
        None,
        description="רשימת מרכיבים (ingredients=ביצה&ingredients=עגבניה...)",
    ),
):
    rows = get_recipes_by_filters_db(meal_type, max_time)

    recipes = [
        Recipe(
            id=r["id"],
            name=r["name"],
            meal_type=r["meal_type"],
            time_minutes=r["time_minutes"],
            tags=r["tags"] or [],
            ingredients=r["ingredients"] or [],
            steps=r["steps"] or [],
        )
        for r in rows
    ]

    # סינון לפי מרכיבים באפליקציה
    if ingredients:
        desired = {i.strip().lower() for i in ingredients if i.strip()}
        if desired:
            recipes = [
                r
                for r in recipes
                if desired.issubset({ing.lower() for ing in r.ingredients})
            ]

    if not recipes:
        raise HTTPException(
            status_code=404,
            detail="לא נמצאו מתכונים מתאימים לפילטרים שבחרת",
        )

    return random.choice(recipes)


if __name__ == "__main__":
    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)