import { Prisma } from "@prisma/client";
import { NextResponse } from "next/server";

import { removeExpense, updateExpense } from "@/lib/expenses";
import { expenseInputSchema } from "@/lib/validation";

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

export async function PATCH(request: Request, context: RouteContext) {
  const { id } = await context.params;
  const payload = await request.json();
  const parsed = expenseInputSchema.safeParse(payload);

  if (!parsed.success) {
    return NextResponse.json(
      { error: parsed.error.issues[0]?.message ?? "Invalid expense payload." },
      { status: 400 },
    );
  }

  try {
    const expense = await updateExpense(id, {
      title: parsed.data.title,
      amountCents: parsed.data.amount,
      date: parsed.data.date,
      category: parsed.data.category,
    });
    return NextResponse.json({ expense });
  } catch (error) {
    if (
      error instanceof Prisma.PrismaClientKnownRequestError &&
      error.code === "P2025"
    ) {
      return NextResponse.json({ error: "Expense not found." }, { status: 404 });
    }
    throw error;
  }
}

export async function DELETE(_: Request, context: RouteContext) {
  const { id } = await context.params;

  try {
    await removeExpense(id);
    return new NextResponse(null, { status: 204 });
  } catch (error) {
    if (
      error instanceof Prisma.PrismaClientKnownRequestError &&
      error.code === "P2025"
    ) {
      return NextResponse.json({ error: "Expense not found." }, { status: 404 });
    }

    throw error;
  }
}