src/components/ui/combobox.tsx

"use client"

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"
import { cn } from "@/lib/utils"
import { Check, ChevronsUpDown, X } from "lucide-react"
import * as React from "react"

export interface ComboboxOption {
  value: string
  label: string
}

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

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

  const handleClear = (e: React.MouseEvent) => {
    e.stopPropagation() // prevent popover from opening
    onValueChange?.("")
  }

  return (
    <Popover open={open} onOpenChange={setOpen}>
      <PopoverTrigger asChild>
        <Button
          variant="outline"
          role="combobox"
          aria-expanded={open}
          className={cn("w-full justify-between overflow-hidden !whitespace-normal", className)}
        >
          <span className="truncate min-w-0 flex-1 text-left">
            {value ? options.find((option) => option.value === value)?.label : (
              <span className="text-muted-foreground">{placeholder}</span>
            )}
          </span>
          <div className="ml-2 flex items-center gap-1 shrink-0">
            {value && (
              <span
                role="button"
                onClick={handleClear}
                className="opacity-50 hover:opacity-100 hover:text-destructive rounded-sm p-0.5"
              >
                <X className="size-3" />
              </span>
            )}
            <ChevronsUpDown className="size-4 opacity-50" />
          </div>
        </Button>
      </PopoverTrigger>
      <PopoverContent className="w-full p-0" align="start">
        <Command
          filter={(value, search) => {
            const option = options.find((opt) => opt.value === value)
            if (!option) return 0
            return option.label.toLowerCase().includes(search.toLowerCase()) ? 1 : 0
          }}
        >
          <CommandInput placeholder={searchPlaceholder} />
          <CommandList>
            <CommandEmpty>{emptyText}</CommandEmpty>
            <CommandGroup>
              {options.map((option) => (
                <CommandItem
                  key={option.value}
                  value={option.value}
                  onSelect={(currentValue) => {
                    onValueChange?.(currentValue === value ? "" : currentValue)
                    setOpen(false)
                  }}
                >
                  <Check className={cn("mr-2 size-4", value === option.value ? "opacity-100" : "opacity-0")} />
                  {option.label}
                </CommandItem>
              ))}
            </CommandGroup>
          </CommandList>
        </Command>
      </PopoverContent>
    </Popover>
  )
}