from __future__ import annotations

from typing import List, Optional

import aiosqlite
from fastapi import APIRouter, Depends, Query, Response

import ingredients as ingredients_mod
import recipes
from api.deps import error_response, get_db, get_household_from_slug
from common import Page, ProblemDetails, ApiModel, Field

router = APIRouter(prefix="/households/{householdSlug}/recipes", tags=["recipes-v2"])


class RecipeOut(ApiModel):
    id: int = -1
    name: str
    link: str
    serves: int
    image_urls: List[str] = Field(min_length=0, json_schema_extra={"minItems": 0})
    ingredients: List[ingredients_mod.Ingredient] = Field(
        min_length=0, json_schema_extra={"minItems": 0}
    )


class RecipeCreate(ApiModel):
    name: str
    link: str
    serves: int
    image_urls: List[str] = Field(min_length=0, json_schema_extra={"minItems": 0})
    ingredients: List[ingredients_mod.Ingredient] = Field(
        min_length=0, json_schema_extra={"minItems": 0}
    )


@router.get("", response_model=Page[RecipeOut])
async def list_recipes(
    household=Depends(get_household_from_slug),
    q: Optional[str] = Query(default=None),
    cursor: Optional[str] = Query(default=None),
    limit: int = Query(50, ge=1, le=200),
    conn: aiosqlite.Connection = Depends(get_db),
):
    last_id = None
    if cursor:
        try:
            last_id = int(cursor)
        except ValueError:
            last_id = None
    fetch_limit = limit + 1
    hid = household["id"]
    paged: List[recipes.Recipe] = []
    if q:
        async for r in recipes.find_recipes_by_name_paged_scoped(
            conn, q, last_id, fetch_limit, hid
        ):
            paged.append(r)
    else:
        async for r in recipes.get_all_paged_scoped(conn, last_id, fetch_limit, hid):
            paged.append(r)
    # Filter by household_id once repositories are fully updated; currently placeholder until repo changes land.
    has_more = len(paged) > limit
    items = paged[:limit]
    if items:
        recipe_ids = [r.id for r in items]
        by_recipe = await ingredients_mod.find_ingredients_by_recipe_ids(conn, recipe_ids)
        for r in items:
            r.ingredients = by_recipe.get(r.id, [])
    next_cursor = str(items[-1].id) if has_more and items else None
    total = await (
        recipes.count_by_name_scoped(conn, q, hid) if q else recipes.count_all_scoped(conn, hid)
    )
    return Page(items=items, nextCursor=next_cursor, prevCursor=None, total=total)


@router.get("/{recipe_id}", response_model=RecipeOut, responses={404: {"model": ProblemDetails}})
async def get_recipe(
    recipe_id: int,
    household=Depends(get_household_from_slug),
    conn: aiosqlite.Connection = Depends(get_db),
):
    r = await recipes.find_recipe_by_id_scoped(conn, recipe_id, household["id"])
    if not r:
        return error_response(None, 404, "Recipe not found")
    return r


@router.delete("/{recipe_id}", response_model=RecipeOut, responses={404: {"model": ProblemDetails}})
async def delete_recipe(
    recipe_id: int,
    household=Depends(get_household_from_slug),
    conn: aiosqlite.Connection = Depends(get_db),
):
    # Load recipe in-scope
    r = await recipes.find_recipe_by_id_scoped(conn, recipe_id, household["id"])
    if not r:
        return error_response(None, 404, "Recipe not found")
    # Hide within household (no hidden_by in v2 yet)
    from recipes.repository import hide_recipe_scoped

    ok = await hide_recipe_scoped(conn, recipe_id, household["id"])
    if not ok:
        return error_response(None, 404, "Recipe not found")
    return r


@router.post("", response_model=RecipeOut, responses={400: {"model": ProblemDetails}})
async def create_recipe(
    recipe: RecipeCreate,
    response: Response,
    household=Depends(get_household_from_slug),
    conn: aiosqlite.Connection = Depends(get_db),
):
    if not recipe.ingredients:
        return error_response(None, 400, "Recipe must have at least one ingredient")
    hid = household["id"]
    # v1 Recipe model requires created_by_id; use 0 placeholder until users replace persons
    r = recipes.Recipe(
        id=-1,
        name=recipe.name,
        link=recipe.link,
        serves=recipe.serves,
        image_urls=recipe.image_urls,
        ingredients=list(recipe.ingredients),
        created_by_id=0,
    )
    await recipes.insert_recipe_scoped(conn, r, hid)
    for ingredient in recipe.ingredients:
        ingredient.recipe_id = r.id
        if ingredient.product:
            ingredient.product_id = ingredient.product.id
        await ingredients_mod.insert_ingredient(conn, ingredient)
    response.headers["Location"] = f"/api/v1/households/{household['slug']}/recipes/{r.id}"
    return r