import { Gift } from "lucide-react";
import { getTranslations } from "next-intl/server";
import { createVoucher, deleteVoucher } from "@/actions/admin-vouchers";
import { StatusCard } from "@/components/admin/dashboard";
import { prisma } from "@/lib/prisma";
import { redirect } from "next/navigation";
import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";

export const dynamic = "force-dynamic";

type VoucherRow = {
	id: bigint;
	code: string;
	amount: number;
	maxUses: number;
	useCount: number;
	expiresAt: Date | null;
	createdAt: Date | null;
};

function fmtDate(d: Date | null): string {
	if (!d) return "—";
	return d.toISOString().slice(0, 16).replace("T", " ");
}

export default async function AdminVouchers() {
	const { session, permissions } = await getAdminContext();
	if (!canAccess(permissions, PERMS.SHOP_VIEW, session.user.rank)) {
		redirect("/admin");
	}

	const t = await getTranslations("pages.admin.vouchers");
	const now = Date.now();

	let vouchers: VoucherRow[] = [];
	try {
		vouchers = await prisma.websiteShopVouchers.findMany({
			select: {
				id: true,
				code: true,
				amount: true,
				maxUses: true,
				useCount: true,
				expiresAt: true,
				createdAt: true,
			},
			orderBy: { id: "desc" },
			take: 200,
		});
	} catch {
		vouchers = [];
	}

	const active = vouchers.filter((v) => {
		const expired = v.expiresAt ? v.expiresAt.getTime() <= now : false;
		const usedUp = v.maxUses > 0 && v.useCount >= v.maxUses;
		return !expired && !usedUp;
	}).length;
	const expiredCount = vouchers.filter(
		(v) => v.expiresAt && v.expiresAt.getTime() <= now,
	).length;
	const usedUpCount = vouchers.filter(
		(v) => v.maxUses > 0 && v.useCount >= v.maxUses,
	).length;

	return (
		<main>
			<div className="flex items-center gap-3 mb-6">
				<div className="w-10 h-10 rounded-xl bg-gradient-to-br from-[var(--admin-accent)]/20 to-[var(--admin-accent)]/5 grid place-items-center">
					<Gift size={20} className="text-[var(--admin-accent)]" />
				</div>
				<div>
					<h1 className="m-0 text-xl font-extrabold text-[var(--admin-text)]">
						{t("title")}
					</h1>
					<p className="m-0 text-xs text-[var(--admin-text-muted)] mt-0.5">
						{t("subtitle")}
					</p>
				</div>
			</div>

			<div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
				<StatusCard label={t("vouchers")} value={vouchers.length} icon="🎟️" />
				<StatusCard
					label={t("active")}
					value={active}
					state={active > 0 ? "ok" : "neutral"}
					icon="✅"
				/>
				<StatusCard
					label={t("usedUp")}
					value={usedUpCount}
					state={usedUpCount > 0 ? "warn" : "neutral"}
					icon="📉"
				/>
				<StatusCard
					label={t("expired")}
					value={expiredCount}
					state={expiredCount > 0 ? "danger" : "neutral"}
					icon="⏰"
				/>
			</div>

			<form action={createVoucher} className="admin-card mb-6">
				<h3 style={{ marginTop: 0 }}>{t("newVoucher")}</h3>
				<div
					className="grid grid-cols-1 gap-4 md:grid-cols-2"
					style={{ marginBottom: "0.75rem" }}
				>
					<label
						style={{ display: "flex", flexDirection: "column", gap: "0.3rem" }}
					>
						<span className="text-sm theme-text-muted dark:theme-text-muted">
							{t("form.code")}
						</span>
						<input
							name="code"
							placeholder={t("form.codePlaceholder")}
							maxLength={255}
							required
						/>
					</label>
					<label
						style={{ display: "flex", flexDirection: "column", gap: "0.3rem" }}
					>
						<span className="text-sm theme-text-muted dark:theme-text-muted">
							{t("form.amount")}
						</span>
						<input
							name="amount"
							type="number"
							min={1}
							placeholder={t("form.amountPlaceholder")}
							required
						/>
					</label>
					<label
						style={{ display: "flex", flexDirection: "column", gap: "0.3rem" }}
					>
						<span className="text-sm theme-text-muted dark:theme-text-muted">
							{t("form.maxUses")}
						</span>
						<input
							name="maxUses"
							type="number"
							min={1}
							defaultValue={1}
							required
						/>
					</label>
					<label
						style={{ display: "flex", flexDirection: "column", gap: "0.3rem" }}
					>
						<span className="text-sm theme-text-muted dark:theme-text-muted">
							{t("form.expiresAt")}
						</span>
						<input name="expiresAt" type="datetime-local" />
					</label>
				</div>
				<button type="submit" className="btn btn-primary">
					{t("form.create")}
				</button>
			</form>

			<section className="mt-6">
				<h2 className="admin-section-title">
					{t("title")} ({vouchers.length})
				</h2>
				<div className="admin-card">
					<table>
						<thead>
							<tr>
								<th>{t("colCode")}</th>
								<th>{t("colAmount")}</th>
								<th>{t("colUses")}</th>
								<th>{t("colStatus")}</th>
								<th>{t("colExpires")}</th>
								<th>{t("colCreated")}</th>
								<th />
							</tr>
						</thead>
						<tbody>
							{vouchers.map((v) => {
								const expired = v.expiresAt
									? v.expiresAt.getTime() <= now
									: false;
								const usedUp = v.maxUses > 0 && v.useCount >= v.maxUses;
								return (
									<tr key={v.id.toString()}>
										<td>
											<code>{v.code}</code>
										</td>
										<td>{v.amount}</td>
										<td>
											{v.useCount} / {v.maxUses}
										</td>
										<td>
											{expired ? (
												<span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-[var(--admin-error-subtle)] text-[var(--admin-text)]">
													{t("statusExpired")}
												</span>
											) : usedUp ? (
												<span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-[var(--admin-accent)]/18 text-[var(--admin-text)]">
													{t("statusUsedUp")}
												</span>
											) : (
												<span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-[var(--admin-success-subtle)] text-[var(--admin-text)]">
													{t("statusActive")}
												</span>
											)}
										</td>
										<td className="text-sm theme-text-muted dark:theme-text-muted whitespace-nowrap">
											{fmtDate(v.expiresAt)}
										</td>
										<td className="text-sm theme-text-muted dark:theme-text-muted whitespace-nowrap">
											{fmtDate(v.createdAt)}
										</td>
										<td>
											<form action={deleteVoucher}>
												<input
													type="hidden"
													name="id"
													value={v.id.toString()}
												/>
												<button type="submit" className="btn btn-danger">
													{t("delete")}
												</button>
											</form>
										</td>
									</tr>
								);
							})}
						</tbody>
					</table>
					{vouchers.length === 0 ? (
						<div className="admin-empty">{t("noVouchers")}</div>
					) : null}
				</div>
			</section>
		</main>
	);
}