// src/renderer/components/shared/SearchInput.tsx
// 공유: 화면 안 검색창. "/" 를 누르면 여기로 포커스가 온다(입력 중이 아닐 때) — 표시만 하고 동작하지 않던
// 키캡을 실제 단축키로 만들었다(2026-09-28). Esc 는 검색어를 지우고, 비어 있으면 포커스를 놓는다.

import React, { useEffect, useRef } from 'react'
import { TextField, InputAdornment, IconButton, Box } from '@mui/material'
import { Search, X } from 'lucide-react'
import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '@d3ro/ui/theme'
import { useI18n } from '@d3ro/i18n'

export interface SearchInputProps {
  value: string
  onChange: (value: string) => void
  placeholder: string
  /** 포커스 단축키. '/' 또는 'Ctrl K'. 빈 문자열이면 끈다 */
  shortcut?: string
  autoFocus?: boolean
}

function isTypingTarget(target: EventTarget | null): boolean {
  if (!(target instanceof HTMLElement)) return false
  return target.isContentEditable || ['INPUT', 'TEXTAREA', 'SELECT'].includes(target.tagName)
}

export function SearchInput({
  value,
  onChange,
  placeholder,
  shortcut = '/',
  autoFocus = false,
}: SearchInputProps): React.ReactElement {
  const { t } = useI18n()
  const inputRef = useRef<HTMLInputElement>(null)

  useEffect(() => {
    const onKeyDown = (e: KeyboardEvent): void => {
      const slash = shortcut === '/'
        && e.key === '/'
        && !e.ctrlKey
        && !e.metaKey
        && !e.altKey
        && !isTypingTarget(e.target)
      const commandK = shortcut === 'Ctrl K'
        && (e.ctrlKey || e.metaKey)
        && !e.altKey
        && !e.shiftKey
        && e.key.toLocaleLowerCase() === 'k'
      if (!slash && !commandK) return
      e.preventDefault()
      inputRef.current?.focus()
    }
    if (shortcut !== '/' && shortcut !== 'Ctrl K') return undefined
    window.addEventListener('keydown', onKeyDown)
    return () => window.removeEventListener('keydown', onKeyDown)
  }, [shortcut])

  return (
    <TextField
      inputRef={inputRef}
      autoFocus={autoFocus}
      placeholder={placeholder}
      value={value}
      onChange={(e) => onChange(e.target.value)}
      onKeyDown={(e) => {
        if (e.key !== 'Escape') return
        if (value) onChange('')
        else inputRef.current?.blur()
      }}
      fullWidth
      sx={{
        mb: 2,
        '& .MuiOutlinedInput-root': {
          bgcolor: d3roPalette.bg.input,
          borderRadius: d3roRadius.button,
          '& fieldset': { borderColor: d3roPalette.border.default },
          '&:hover fieldset': { borderColor: d3roPalette.border.strong },
          '&.Mui-focused fieldset': { borderColor: d3roPalette.accent.main, borderWidth: 1 },
        },
        '& .MuiInputBase-input': {
          fontSize: d3roTypo.compact.size,
          color: d3roPalette.text.primary,
          py: 1,
          '&::placeholder': { color: d3roPalette.text.tertiary, opacity: 1 },
        },
      }}
      slotProps={{
        htmlInput: { 'aria-label': placeholder, type: 'search' },
        input: {
          startAdornment: (
            <InputAdornment position="start">
              <Search size={16} aria-hidden style={{ color: d3roPalette.text.tertiary }} />
            </InputAdornment>
          ),
          endAdornment: value ? (
            <InputAdornment position="end">
              <IconButton size="small" aria-label={t('common.clear')} onClick={() => onChange('')} sx={{ p: 0.5 }}>
                <X size={15} />
              </IconButton>
            </InputAdornment>
          ) : shortcut ? (
            <InputAdornment position="end" aria-hidden>
              <Box
                component="kbd"
                sx={{
                  px: 0.75,
                  py: 0.25,
                  borderRadius: d3roRadius.xs,
                  border: `1px solid ${d3roPalette.border.default}`,
                  fontFamily: d3roFontMono,
                  fontSize: '11px',
                  color: d3roPalette.text.tertiary,
                  lineHeight: 1,
                  userSelect: 'none',
                }}
              >
                {shortcut}
              </Box>
            </InputAdornment>
          ) : undefined,
        },
      }}
    />
  )
}