'use client'

import { useEffect, useRef } from 'react'
import { motion } from 'framer-motion'
import { X, Maximize2 } from 'lucide-react'
import type { Note } from '@/lib/types'
import { useLanguage } from '@/lib/i18n'
import { NoteEditorProvider, useNoteEditorContext } from './note-editor-context'
import { NoteTitleBlock } from './note-title-block'
import { NoteContentArea } from './note-content-area'
import { formatAbsoluteDateLocalized } from '@/lib/utils/format-localized-date'
import { fr } from 'date-fns/locale/fr'
import { enUS } from 'date-fns/locale/en-US'

interface NoteEditorSplitPeekProps {
  note: Note
  blockId?: string
  onClose: () => void
  onOpenFully: () => void
}

function PeekEditorBody({ blockId }: { blockId?: string }) {
  const { note } = useNoteEditorContext()
  const { t, language } = useLanguage()
  const dateLocale = language === 'fr' ? fr : enUS
  const scrollRootRef = useRef<HTMLDivElement>(null)

  useEffect(() => {
    if (!blockId) return
    const timer = window.setTimeout(() => {
      const escaped = typeof CSS !== 'undefined' && CSS.escape ? CSS.escape(blockId) : blockId
      const el = scrollRootRef.current?.querySelector(`[data-id="${escaped}"]`)
      el?.scrollIntoView({ behavior: 'smooth', block: 'center' })
    }, 450)
    return () => window.clearTimeout(timer)
  }, [blockId, note.id])

  return (
    <div ref={scrollRootRef} className="flex-1 min-h-0 overflow-y-auto">
      <div className="max-w-2xl mx-auto w-full px-6 sm:px-8 py-10 space-y-8 pb-24">
        <p
          className="text-[10px] uppercase tracking-[.25em] font-bold text-[var(--color-concrete)]"
          suppressHydrationWarning
        >
          {formatAbsoluteDateLocalized(new Date(note.contentUpdatedAt), language, 'MMM d, yyyy', dateLocale)}
        </p>
        <NoteTitleBlock />
        <div className="max-w-xl mx-auto w-full">
          <NoteContentArea />
        </div>
        <p className="text-[11px] text-[var(--color-concrete)] italic">{t('notePeek.readOnlyHint')}</p>
      </div>
    </div>
  )
}

export function NoteEditorSplitPeek({ note, blockId, onClose, onOpenFully }: NoteEditorSplitPeekProps) {
  const { t, language } = useLanguage()
  const isRtl = language === 'fa' || language === 'ar'

  return (
    <motion.aside
      initial={{ width: 0, opacity: 0 }}
      animate={{ width: 'min(50vw, 720px)', opacity: 1 }}
      exit={{ width: 0, opacity: 0 }}
      transition={{ type: 'spring', stiffness: 340, damping: 34 }}
      className={`shrink-0 h-full min-h-0 bg-[#fafaf9] dark:bg-zinc-950 flex flex-col overflow-hidden z-40 ${
        isRtl
          ? 'border-r border-black/10 dark:border-white/10 shadow-[4px_0_24px_-12px_rgba(0,0,0,0.12)]'
          : 'border-l border-black/10 dark:border-white/10 shadow-[-4px_0_24px_-12px_rgba(0,0,0,0.12)]'
      }`}
      aria-label={t('notePeek.panelLabel')}
    >
      <NoteEditorProvider note={note} readOnly fullPage>
        <div className="shrink-0 px-4 py-2.5 flex items-center justify-between gap-3 border-b border-black/[0.06] dark:border-white/[0.06] bg-white/80 dark:bg-zinc-900/80 backdrop-blur-sm">
          <span className="text-[10px] font-bold uppercase tracking-[0.2em] text-[var(--color-concrete)] truncate">
            {t('notePeek.label')}
          </span>
          <div className="flex items-center gap-1 shrink-0">
            <button
              type="button"
              onClick={onOpenFully}
              className="inline-flex items-center gap-1.5 px-2.5 py-1.5 rounded-lg text-[10px] font-bold uppercase tracking-wide text-blue-600 dark:text-blue-400 hover:bg-blue-500/10 transition-colors"
              title={t('notePeek.openFullyHelp')}
            >
              <Maximize2 size={12} />
              {t('notePeek.openFully')}
            </button>
            <button
              type="button"
              onClick={onClose}
              className="p-1.5 rounded-lg text-[var(--color-concrete)] hover:text-[var(--color-ink)] hover:bg-black/5 dark:hover:bg-white/5 transition-colors"
              title={t('notePeek.close')}
              aria-label={t('notePeek.close')}
            >
              <X size={16} />
            </button>
          </div>
        </div>
        <PeekEditorBody blockId={blockId} />
      </NoteEditorProvider>
    </motion.aside>
  )
}