import { NextRequest, NextResponse } from "next/server";
import { z } from "zod";
import { db, pantryItems, eq, and } from "@epicure/db";
import { requireSessionOrApiKey } from "@/lib/api-auth";
import { findIngredientIdByName } from "@/lib/ingredient-match";

type Params = { params: Promise<{ id: string }> };

export async function PUT(req: NextRequest, { params }: Params) {
  const { session, response } = await requireSessionOrApiKey(req);
  if (response) return response;
  const { id } = await params;

  const item = await db.query.pantryItems.findFirst({ where: and(eq(pantryItems.id, id), eq(pantryItems.userId, session!.user.id)) });
  if (!item) return NextResponse.json({ error: "Not found" }, { status: 404 });

  const body = await req.json() as unknown;
  const parsed = z.object({
    rawName: z.string().min(1).max(200).optional(),
    quantity: z.string().nullable().optional(),
    unit: z.string().nullable().optional(),
    notes: z.string().max(500).nullable().optional(),
    aisle: z.string().max(50).nullable().optional(),
    expiresAt: z.string().datetime().nullable().optional(),
  }).safeParse(body);
  if (!parsed.success) return NextResponse.json({ error: "Validation error" }, { status: 400 });

  const data = parsed.data;
  // Renaming can change which canonical ingredient this item resolves to
  // (e.g. "sel" -> "sel de table") — re-resolve whenever rawName changes,
  // rather than leaving a stale link from the item's original name.
  const ingredientId = data.rawName ? await findIngredientIdByName(data.rawName) : undefined;
  await db.update(pantryItems).set({
    ...(data.rawName && { rawName: data.rawName, ingredientId }),
    ...(data.quantity !== undefined && { quantity: data.quantity ?? undefined }),
    ...(data.unit !== undefined && { unit: data.unit ?? undefined }),
    ...(data.notes !== undefined && { notes: data.notes ?? undefined }),
    ...(data.aisle !== undefined && { aisle: data.aisle ?? undefined }),
    ...(data.expiresAt !== undefined && { expiresAt: data.expiresAt ? new Date(data.expiresAt) : undefined }),
  }).where(eq(pantryItems.id, id));

  return NextResponse.json({ updated: true });
}

export async function DELETE(req: NextRequest, { params }: Params) {
  const { session, response } = await requireSessionOrApiKey(req);
  if (response) return response;
  const { id } = await params;

  await db.delete(pantryItems).where(and(eq(pantryItems.id, id), eq(pantryItems.userId, session!.user.id)));
  return new NextResponse(null, { status: 204 });
}
