'use client'

import { type ReactNode } from 'react'
import { motion, AnimatePresence, useReducedMotion } from 'motion/react'
import { X, Maximize2, Loader2 } from 'lucide-react'
import { useLanguage } from '@/lib/i18n'
import type { Note } from '@/lib/types'
import { NotePeekContent } from './note-peek-content'

interface NotePeekPanelProps {
  note: Note | null
  blockId?: string
  loading?: boolean
  mode: 'overlay' | 'inline'
  onClose: () => void
  onOpenFully?: (note: Note) => void
  labelKey?: string
  renderContent?: (note: Note, blockId?: string) => ReactNode
}

export function NotePeekPanel({
  note,
  blockId,
  loading = false,
  mode,
  onClose,
  onOpenFully,
  labelKey = 'notePeek.label',
  renderContent,
}: NotePeekPanelProps) {
  const { t, language } = useLanguage()
  const isRtl = language === 'fa' || language === 'ar'
  const prefersReducedMotion = useReducedMotion()
  const isOpen = note !== null || loading

  const spring = prefersReducedMotion
    ? { duration: 0 }
    : { type: 'spring' as const, stiffness: 340, damping: 34 }

  const content = (
    <>
      <div className="shrink-0 px-5 py-3 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-concrete truncate">
          {loading
            ? (t('notePeek.loading') || 'Loading…')
            : (note?.title || t('notePeek.untitled') || t('insightsView.unknownNote'))}
        </span>
        <div className="flex items-center gap-1 shrink-0">
          {onOpenFully && note && (
            <button
              onClick={() => onOpenFully(note)}
              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 cursor-pointer focus-visible:ring-2 focus-visible:ring-brand-accent/50 focus-visible:outline-none"
              title={t('notePeek.openFullyHelp') || 'Open full screen'}
              aria-label={t('notePeek.openFully') || 'Open fully'}
            >
              <Maximize2 size={12} />
            </button>
          )}
          <button
            onClick={onClose}
            className="p-1.5 rounded-lg text-concrete hover:text-ink dark:hover:text-dark-ink hover:bg-black/5 dark:hover:bg-white/5 transition-colors cursor-pointer focus-visible:ring-2 focus-visible:ring-brand-accent/50 focus-visible:outline-none"
            aria-label={t('notePeek.close') || 'Close'}
          >
            <X size={16} />
          </button>
        </div>
      </div>

      <div className="flex-1 min-h-0 overflow-y-auto custom-scrollbar">
        {loading ? (
          <div className="flex items-center justify-center h-full">
            <Loader2 className="animate-spin text-brand-accent/40" size={28} />
          </div>
        ) : note ? (
          <div className="max-w-2xl mx-auto w-full px-6 sm:px-8 py-8 pb-24">
            {renderContent ? (
              renderContent(note, blockId)
            ) : (
              <>
                <h2 className="text-xl font-serif font-medium text-ink dark:text-dark-ink mb-6">
                  {note.title || t('notePeek.untitled') || 'Untitled'}
                </h2>
                <NotePeekContent note={note} />
              </>
            )}
          </div>
        ) : null}
      </div>
    </>
  )

  if (mode === 'overlay') {
    return (
      <AnimatePresence>
        {isOpen && (
          <motion.aside
            key="note-peek-overlay"
            initial={{ x: isRtl ? '-100%' : '100%', opacity: 0 }}
            animate={{ x: 0, opacity: 1 }}
            exit={{ x: isRtl ? '-100%' : '100%', opacity: 0 }}
            transition={spring}
            className={`fixed top-0 ${isRtl ? 'left-0' : 'right-0'} z-[80] h-full w-full sm:w-[min(50vw,640px)] bg-[#fafaf9] dark:bg-zinc-950 flex flex-col overflow-hidden shadow-2xl ${isRtl ? 'border-r' : 'border-l'} border-black/10 dark:border-white/10`}
            role="dialog"
            aria-modal="true"
            aria-label={t(labelKey) || 'Note preview'}
          >
            {content}
          </motion.aside>
        )}
      </AnimatePresence>
    )
  }

  // inline mode
  return (
    <AnimatePresence>
      {isOpen && (
        <motion.aside
          key="note-peek-inline"
          initial={{ width: 0, opacity: 0 }}
          animate={{ width: 'min(50vw, 720px)', opacity: 1 }}
          exit={{ width: 0, opacity: 0 }}
          transition={spring}
          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(labelKey) || 'Note preview'}
        >
          {content}
        </motion.aside>
      )}
    </AnimatePresence>
  )
}