"use client";

import { cn } from "@/lib/utils";
import { Inbox, Loader2, AlertCircle } from "lucide-react";
import { Button } from "./Button";

export function PageHeader({
  title,
  description,
  actions,
}: {
  title: string;
  description?: string;
  actions?: React.ReactNode;
}) {
  return (
    <div className="mb-6 flex flex-col gap-3 sm:flex-row sm:items-end sm:justify-between">
      <div>
        <h1 className="text-2xl font-bold tracking-tight text-secondary">{title}</h1>
        {description ? <p className="mt-1 text-sm text-[var(--muted)]">{description}</p> : null}
      </div>
      {actions ? <div className="flex flex-wrap items-center gap-2">{actions}</div> : null}
    </div>
  );
}

export function EmptyState({
  title = "موردی یافت نشد",
  description = "هنوز داده‌ای ثبت نشده است.",
  action,
}: {
  title?: string;
  description?: string;
  action?: React.ReactNode;
}) {
  return (
    <div className="flex flex-col items-center justify-center gap-3 rounded-2xl border border-dashed border-[var(--border)] bg-[var(--surface)] px-6 py-16 text-center">
      <div className="rounded-full bg-[var(--surface-muted)] p-3">
        <Inbox className="h-6 w-6 text-[var(--muted)]" />
      </div>
      <div>
        <p className="font-medium text-secondary">{title}</p>
        <p className="mt-1 text-sm text-[var(--muted)]">{description}</p>
      </div>
      {action}
    </div>
  );
}

export function LoadingState({ label = "در حال بارگذاری…" }: { label?: string }) {
  return (
    <div className="flex items-center justify-center gap-2 py-16 text-sm text-[var(--muted)]">
      <Loader2 className="h-5 w-5 animate-spin" />
      {label}
    </div>
  );
}

export function ErrorState({
  message,
  onRetry,
}: {
  message: string;
  onRetry?: () => void;
}) {
  return (
    <div className="flex flex-col items-center justify-center gap-3 rounded-2xl border border-red-200 bg-red-50 px-6 py-12 text-center dark:border-red-900 dark:bg-red-950/30">
      <AlertCircle className="h-6 w-6 text-red-600" />
      <p className="text-sm text-red-700 dark:text-red-300">{message}</p>
      {onRetry ? (
        <Button type="button" variant="outline" size="sm" onClick={onRetry}>
          تلاش مجدد
        </Button>
      ) : null}
    </div>
  );
}

export function DataTable({
  columns,
  rows,
  empty,
}: {
  columns: { key: string; header: string; className?: string; render?: (row: Record<string, unknown>) => React.ReactNode }[];
  rows: Record<string, unknown>[];
  empty?: React.ReactNode;
}) {
  if (!rows.length) return <>{empty}</>;
  return (
    <div className="overflow-x-auto rounded-2xl border border-[var(--border)] bg-[var(--surface)]">
      <table className="w-full min-w-[640px] text-sm">
        <thead className="bg-[var(--surface-muted)] text-right">
          <tr>
            {columns.map((c) => (
              <th
                key={c.key}
                className={cn(
                  "px-4 py-3 font-medium text-[var(--muted)] first:rounded-tr-2xl last:rounded-tl-2xl",
                  c.className
                )}
              >
                {c.header}
              </th>
            ))}
          </tr>
        </thead>
        <tbody>
          {rows.map((row, i) => (
            <tr key={String(row.id ?? i)} className="border-t border-[var(--border)] hover:bg-[var(--surface-muted)]/60">
              {columns.map((c) => (
                <td key={c.key} className={cn("px-4 py-3 text-secondary", c.className)}>
                  {c.render ? c.render(row) : String(row[c.key] ?? "—")}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  );
}

export function StatCard({
  label,
  value,
  hint,
}: {
  label: string;
  value: string | number;
  hint?: string;
}) {
  return (
    <div className="rounded-2xl border border-[var(--border)] bg-[var(--surface)] p-5 shadow-[var(--shadow-sm)]">
      <p className="text-sm text-[var(--muted)]">{label}</p>
      <p className="mt-2 text-2xl font-bold text-secondary">{value}</p>
      {hint ? <p className="mt-1 text-xs text-[var(--muted)]">{hint}</p> : null}
    </div>
  );
}