"use server";

import { revalidatePath } from "next/cache";
import { requirePermission } from "@/lib/admin/guard";
import { PERMS } from "@/lib/permissions";
import { formPositiveBigInt } from "@/lib/form-data";
import { prisma } from "@/lib/prisma";
import { logServerError } from "@/lib/server-log";

export async function createVoucher(formData: FormData): Promise<void> {
	await requirePermission(PERMS.SHOP_EDIT);

	const code = String(formData.get("code") ?? "")
		.normalize("NFC")
		.trim()
		.slice(0, 255);
	const amount = Number(formData.get("amount"));
	const maxUsesRaw = Number(formData.get("maxUses"));
	const maxUses =
		Number.isFinite(maxUsesRaw) && maxUsesRaw > 0 ? Math.floor(maxUsesRaw) : 1;

	if (!code || !(amount > 0)) return;

	const expiresRaw = String(formData.get("expiresAt") ?? "")
		.normalize("NFC")
		.trim();
	let expiresAt: Date | null = null;
	if (expiresRaw) {
		const parsed = new Date(expiresRaw);
		if (!Number.isNaN(parsed.getTime())) expiresAt = parsed;
	}

	const now = new Date();

	try {
		await prisma.websiteShopVouchers.create({
			data: {
				code,
				amount: Math.floor(amount),
				maxUses,
				useCount: 0,
				expiresAt,
				createdAt: now,
				updatedAt: now,
			},
		});
	} catch (error) {
		logServerError("admin.voucher_create_failed", error);
		// Unique constraint on `code` (or DB unavailable) — swallow and re-render.
		return;
	}

	revalidatePath("/admin/vouchers");
}

export async function deleteVoucher(formData: FormData): Promise<void> {
	await requirePermission(PERMS.SHOP_EDIT);

	const id = formPositiveBigInt(formData, "id");
	if (!id) return;

	try {
		await prisma.websiteShopVouchers.delete({ where: { id } });
	} catch (error) {
		logServerError("admin.voucher_delete_failed", error, {
			voucherId: String(id),
		});
		return;
	}

	revalidatePath("/admin/vouchers");
}