"use client";

import { useState, useRef, useEffect } from "react";
import { ChevronDown, Search } from "lucide-react";
import { cn } from "@/lib/utils";

interface SearchableSelectProps {
  label?: string;
  value: string;
  onChange: (value: string) => void;
  options: { value: string; label: string }[];
  disabled?: boolean;
  className?: string;
}

export function SearchableSelect({
  label,
  value,
  onChange,
  options,
  disabled,
  className,
}: SearchableSelectProps) {
  const [open, setOpen] = useState(false);
  const [query, setQuery] = useState("");
  const containerRef = useRef<HTMLDivElement>(null);
  const inputRef = useRef<HTMLInputElement>(null);

  const filtered = query
    ? options.filter((o) => o.label.toLowerCase().includes(query.toLowerCase()))
    : options;

  const selectedLabel = options.find((o) => o.value === value)?.label ?? value;

  useEffect(() => {
    if (open) {
      setQuery("");
      setTimeout(() => inputRef.current?.focus(), 0);
    }
  }, [open]);

  useEffect(() => {
    function handleClickOutside(e: MouseEvent) {
      if (containerRef.current && !containerRef.current.contains(e.target as Node)) {
        setOpen(false);
      }
    }
    document.addEventListener("mousedown", handleClickOutside);
    return () => document.removeEventListener("mousedown", handleClickOutside);
  }, []);

  function handleKeyDown(e: React.KeyboardEvent) {
    if (e.key === "Escape") setOpen(false);
  }

  return (
    <div className={cn("flex flex-col gap-1", className)} ref={containerRef}>
      {label && (
        <label className="text-[10px] font-medium text-neutral-500 uppercase tracking-wide">
          {label}
        </label>
      )}
      <div className="relative">
        <button
          type="button"
          disabled={disabled}
          onClick={() => setOpen((o) => !o)}
          className={cn(
            "w-full flex items-center justify-between rounded-md border border-neutral-200 bg-white pl-2.5 pr-7 py-1 text-xs text-neutral-800 text-left",
            "transition-all duration-200 outline-none cursor-pointer",
            "focus:border-brand-green focus:ring-2 focus:ring-brand-green/10",
            "disabled:opacity-50 disabled:cursor-not-allowed"
          )}
        >
          <span className="truncate">{selectedLabel}</span>
        </button>
        <ChevronDown
          className={cn(
            "absolute right-2 top-1/2 -translate-y-1/2 h-3 w-3 text-neutral-400 pointer-events-none transition-transform",
            open && "rotate-180"
          )}
        />

        {open && (
          <div className="absolute z-50 mt-1 w-full rounded-md border border-neutral-200 bg-white shadow-lg">
            <div className="flex items-center gap-1.5 border-b border-neutral-100 px-2 py-1.5">
              <Search className="h-3 w-3 text-neutral-400 shrink-0" />
              <input
                ref={inputRef}
                type="text"
                value={query}
                onChange={(e) => setQuery(e.target.value)}
                onKeyDown={handleKeyDown}
                placeholder="Cari..."
                className="w-full text-xs outline-none placeholder:text-neutral-400"
              />
            </div>
            <ul className="max-h-48 overflow-y-auto py-1">
              {filtered.length === 0 ? (
                <li className="px-3 py-1.5 text-xs text-neutral-400">Tidak ditemukan</li>
              ) : (
                filtered.map((opt) => (
                  <li
                    key={opt.value}
                    onClick={() => {
                      onChange(opt.value);
                      setOpen(false);
                    }}
                    className={cn(
                      "px-3 py-1.5 text-xs cursor-pointer hover:bg-neutral-50",
                      opt.value === value && "font-medium text-brand-green bg-brand-green/5"
                    )}
                  >
                    {opt.label}
                  </li>
                ))
              )}
            </ul>
          </div>
        )}
      </div>
    </div>
  );
}