'use client'

import { useState, useEffect } from 'react'
import { Search, X } from 'lucide-react'
import { Input } from '@/components/ui/input'
import { cn } from '@/lib/utils'
import { useLanguage } from '@/lib/i18n'

export interface Section {
  id: string
  label: string
  description: string
  icon: React.ReactNode
  href: string
}

interface SettingsSearchProps {
  sections: Section[]
  onFilter: (filteredSections: Section[]) => void
  placeholder?: string
  className?: string
}

export function SettingsSearch({
  sections,
  onFilter,
  placeholder,
  className
}: SettingsSearchProps) {
  const { t } = useLanguage()
  const [query, setQuery] = useState('')
  const [filteredSections, setFilteredSections] = useState<Section[]>(sections)

  const searchPlaceholder = placeholder || t('settings.searchNoResults') || 'Search settings...'

  useEffect(() => {
    if (!query.trim()) {
      setFilteredSections(sections)
      return
    }

    const queryLower = query.toLowerCase()
    const filtered = sections.filter(section => {
      const labelMatch = section.label.toLowerCase().includes(queryLower)
      const descMatch = section.description.toLowerCase().includes(queryLower)
      return labelMatch || descMatch
    })
    setFilteredSections(filtered)
  }, [query, sections])

  const handleClearSearch = () => {
    setQuery('')
    setFilteredSections(sections)
  }

  useEffect(() => {
    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key === 'Escape') {
        handleClearSearch()
        e.stopPropagation()
      }
    }

    document.addEventListener('keydown', handleKeyDown)
    return () => {
      document.removeEventListener('keydown', handleKeyDown)
    }
  }, [])

  const handleSearchChange = (value: string) => {
    setQuery(value)
  }

  const hasResults = query.trim() && filteredSections.length < sections.length
  const isEmptySearch = query.trim() && filteredSections.length === 0

  return (
    <div className={cn('relative', className)}>
      <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-gray-400" />
      <Input
        type="text"
        value={query}
        onChange={(e) => handleSearchChange(e.target.value)}
        placeholder={searchPlaceholder}
        className="pl-10"
        autoFocus
      />
      {hasResults && (
        <button
          type="button"
          onClick={handleClearSearch}
          className="absolute right-2 top-1/2 text-gray-400 hover:text-gray-600"
          aria-label={t('search.placeholder')}
        >
          <X className="h-4 w-4" />
        </button>
      )}
      {isEmptySearch && (
        <div className="absolute top-full left-0 right-0 mt-1 p-2 bg-white rounded-lg shadow-lg border z-50">
          <p className="text-sm text-gray-600">{t('settings.searchNoResults')}</p>
        </div>
      )}
    </div>
  )
}
