import { revalidatePath } from "next/cache";
import { NextResponse } from "next/server";
import { WAFFLE_CATEGORIES } from "@/lib/constants";
import { normalizeImageUrl } from "@/lib/image-url";
import { parseStrictBoolean } from "@/lib/json-fields";
import { prisma } from "@/lib/prisma";
import { getSessionUserId } from "@/lib/session";
import {
  parseIngredientIds,
  validateIngredientIds,
  waffleIngredientInclude,
} from "@/lib/waffle-ingredients";

const CATEGORIES: Set<string> = new Set(Object.values(WAFFLE_CATEGORIES));

export async function GET() {
  const userId = await getSessionUserId();
  if (!userId) {
    return NextResponse.json({ error: "Non autorisé" }, { status: 401 });
  }

  const waffles = await prisma.waffle.findMany({
    orderBy: [{ category: "asc" }, { name: "asc" }],
    include: waffleIngredientInclude,
  });
  return NextResponse.json(waffles);
}

export async function POST(request: Request) {
  const userId = await getSessionUserId();
  if (!userId) {
    return NextResponse.json({ error: "Non autorisé" }, { status: 401 });
  }

  let body: {
    name?: string;
    ingredients?: string;
    price?: number;
    isNew?: boolean;
    category?: string;
    imageUrl?: string | null;
    ingredientIds?: unknown;
  };
  try {
    body = await request.json();
  } catch {
    return NextResponse.json({ error: "Corps invalide" }, { status: 400 });
  }

  const name = String(body.name ?? "").trim();
  const ingredients = String(body.ingredients ?? "").trim();
  const price = Number(body.price);
  const isNewParsed = parseStrictBoolean(body.isNew, "isNew", false);
  if (!isNewParsed.ok) {
    return NextResponse.json({ error: isNewParsed.error }, { status: 400 });
  }
  const isNew = isNewParsed.value;
  const category = String(body.category ?? "").trim();
  const imageUrl = normalizeImageUrl(body.imageUrl);

  if (!name || !ingredients || Number.isNaN(price) || price < 0) {
    return NextResponse.json({ error: "Données invalides" }, { status: 400 });
  }
  if (!CATEGORIES.has(category)) {
    return NextResponse.json({ error: "Catégorie invalide" }, { status: 400 });
  }
  if (
    body.imageUrl != null &&
    String(body.imageUrl).trim() !== "" &&
    imageUrl === null
  ) {
    return NextResponse.json({ error: "URL d’image invalide" }, { status: 400 });
  }

  const ingredientIds = parseIngredientIds(body.ingredientIds) ?? [];
  if (!(await validateIngredientIds(ingredientIds))) {
    return NextResponse.json({ error: "Ingrédient inconnu" }, { status: 400 });
  }

  const waffle = await prisma.waffle.create({
    data: {
      name,
      ingredients,
      price,
      isNew,
      category,
      imageUrl,
      ...(ingredientIds.length > 0
        ? { ingredientItems: { connect: ingredientIds.map((id) => ({ id })) } }
        : {}),
    },
    include: waffleIngredientInclude,
  });
  revalidatePath("/");
  return NextResponse.json(waffle);
}