src/components/ui/combobox.tsx

import 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,
} from "@/components/ui/command";
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "@/components/ui/popover";

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

interface ComboboxProps {
  options: ComboboxOption[];
  value?: string;
  onValueChange?: (value: string) => void;
  placeholder?: string;
  emptyMessage?: string;
  className?: string;
  disabled?: boolean;
  searchPlaceholder?: string;
}

export function Combobox({
  options,
  value,
  onValueChange,
  placeholder = "Select option...",
  emptyMessage = "No options found.",
  className,
  disabled = false,
  searchPlaceholder = "Search..."
}: ComboboxProps) {
  const [open, setOpen] = React.useState(false);
  
  const selectedOption = options.find(option => option.value === value);

  return (
    <div className="relative w-full">
      <Popover open={open} onOpenChange={setOpen}>
        <PopoverTrigger asChild>
          <Button
            variant="outline"
            role="combobox"
            aria-expanded={open}
            className={cn("w-full justify-between", className)}
            disabled={disabled}
          >
            {selectedOption ? selectedOption.label : placeholder}
            <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
          </Button>
        </PopoverTrigger>
        <PopoverContent className="w-full p-0" align="start">
          <Command>
            <CommandInput placeholder={searchPlaceholder} />
            <CommandEmpty>{emptyMessage}</CommandEmpty>
            <CommandGroup className="max-h-64 overflow-auto">
              {options.map((option) => (
                <CommandItem
                  key={option.value}
                  value={option.value}
                  onSelect={() => {
                    onValueChange?.(option.value);
                    setOpen(false);
                  }}
                >
                  <Check
                    className={cn(
                      "mr-2 h-4 w-4",
                      value === option.value ? "opacity-100" : "opacity-0"
                    )}
                  />
                  {option.label}
                </CommandItem>
              ))}
            </CommandGroup>
          </Command>
        </PopoverContent>
      </Popover>
    </div>
  );
}