"use client";

import { useRouter, useSearchParams } from "next/navigation";
import { useState } from "react";

interface Props {
  costCentres: { ref: string; name: string }[];
}

export function ApprovalsSearch({ costCentres }: Props) {
  const router = useRouter();
  const sp = useSearchParams();

  const [q, setQ] = useState(sp.get("q") ?? "");
  const [costCentreRef, setCostCentreRef] = useState(sp.get("costCentreRef") ?? "");
  const [dateFrom, setDateFrom] = useState(sp.get("dateFrom") ?? "");
  const [dateTo, setDateTo] = useState(sp.get("dateTo") ?? "");

  function apply() {
    const params = new URLSearchParams();
    if (q.trim()) params.set("q", q.trim());
    if (costCentreRef) params.set("costCentreRef", costCentreRef);
    if (dateFrom) params.set("dateFrom", dateFrom);
    if (dateTo) params.set("dateTo", dateTo);
    router.push(`/approvals?${params.toString()}`);
  }

  function clear() {
    setQ(""); setCostCentreRef(""); setDateFrom(""); setDateTo("");
    router.push("/approvals");
  }

  const hasFilters = q || costCentreRef || dateFrom || dateTo;

  return (
    <div className="mb-4 rounded-lg border border-neutral-200 bg-white p-4">
      <div className="grid grid-cols-2 gap-3 sm:grid-cols-4">
        <div className="sm:col-span-2">
          <label className="block text-xs font-medium text-neutral-600 mb-1">Search (PO number or submitter)</label>
          <input type="text" value={q} onChange={(e) => setQ(e.target.value)}
            onKeyDown={(e) => e.key === "Enter" && apply()}
            placeholder="e.g. PO-0012 or John…"
            className="w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20" />
        </div>
        <div>
          <label className="block text-xs font-medium text-neutral-600 mb-1">Cost Centre</label>
          <select value={costCentreRef} onChange={(e) => setCostCentreRef(e.target.value)}
            className="w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20">
            <option value="">All cost centres</option>
            {costCentres.map((c) => (
              <option key={c.ref} value={c.ref}>{c.name}</option>
            ))}
          </select>
        </div>
        <div>
          <label className="block text-xs font-medium text-neutral-600 mb-1">Submitted from</label>
          <input type="date" value={dateFrom} onChange={(e) => setDateFrom(e.target.value)}
            className="w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20" />
        </div>
      </div>
      <div className="mt-3 flex items-center gap-2">
        <button onClick={apply}
          className="rounded-lg bg-primary-600 px-3 py-1.5 text-sm font-medium text-white hover:bg-primary-700 transition-colors">
          Search
        </button>
        {hasFilters && (
          <button onClick={clear}
            className="rounded-lg border border-neutral-300 bg-white px-3 py-1.5 text-sm font-medium text-neutral-600 hover:bg-neutral-50 transition-colors">
            Clear
          </button>
        )}
      </div>
    </div>
  );
}
