"use client";

import * as React from "react";
import { Check, ChevronsUpDown } from "lucide-react";
import { cn } from "@/lib/utils";
import { Button } from "@/components/ui/button";
import {
  Command,
  CommandEmpty,
  CommandGroup,
  CommandInput,
  CommandItem,
  CommandList,
} from "@/components/ui/command";
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "@/components/ui/popover";

export interface SearchableSelectOption {
  value: string;
  label: string;
}

interface SearchableSelectProps {
  options: SearchableSelectOption[];
  value: string;
  onChange: (value: string) => void;
  placeholder?: string;
  searchPlaceholder?: string;
  emptyMessage?: string;
  className?: string;
  allowCustom?: boolean;
}

export function SearchableSelect({
  options,
  value,
  onChange,
  placeholder = "Select...",
  searchPlaceholder = "Search...",
  emptyMessage = "No results found.",
  className,
  allowCustom = false,
}: SearchableSelectProps) {
  const [open, setOpen] = React.useState(false);
  const [search, setSearch] = React.useState("");

  const selectedLabel = options.find((opt) => opt.value === value)?.label || value || "";

  return (
    <Popover open={open} onOpenChange={setOpen}>
      <PopoverTrigger asChild>
        <Button
          variant="outline"
          role="combobox"
          aria-expanded={open}
          className={cn("w-full justify-between font-normal", !value && "text-muted-foreground", className)}
        >
          <span className="truncate">{selectedLabel || placeholder}</span>
          <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
        </Button>
      </PopoverTrigger>
      <PopoverContent className="w-[--radix-popover-trigger-width] p-0" align="start">
        <Command>
          <CommandInput
            placeholder={searchPlaceholder}
            value={search}
            onValueChange={setSearch}
          />
          <CommandList>
            <CommandEmpty>
              {allowCustom && search ? (
                <button
                  type="button"
                  className="w-full px-2 py-1.5 text-left text-sm hover:bg-accent"
                  onClick={() => {
                    onChange(search);
                    setOpen(false);
                    setSearch("");
                  }}
                >
                  Use &ldquo;{search}&rdquo;
                </button>
              ) : (
                emptyMessage
              )}
            </CommandEmpty>
            <CommandGroup>
              {options.map((option) => (
                <CommandItem
                  key={option.value}
                  value={option.label}
                  onSelect={() => {
                    onChange(option.value === value ? "" : option.value);
                    setOpen(false);
                    setSearch("");
                  }}
                >
                  <Check
                    className={cn(
                      "mr-2 h-4 w-4",
                      value === option.value ? "opacity-100" : "opacity-0"
                    )}
                  />
                  {option.label}
                </CommandItem>
              ))}
            </CommandGroup>
          </CommandList>
        </Command>
      </PopoverContent>
    </Popover>
  );
}