import { useEffect } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
import { X } from 'lucide-react';

interface ShortcutGroup {
  title: string;
  shortcuts: { keys: string[]; description: string }[];
}

const shortcutGroups: ShortcutGroup[] = [
  {
    title: 'General',
    shortcuts: [
      { keys: ['Ctrl', 'K'], description: 'Open search' },
      { keys: ['?'], description: 'Show keyboard shortcuts' },
      { keys: ['Esc'], description: 'Close dialog / panel' },
    ],
  },
  {
    title: 'Playback',
    shortcuts: [
      { keys: ['Space'], description: 'Play / Pause' },
      { keys: ['N'], description: 'Next track' },
      { keys: ['P'], description: 'Previous track' },
      { keys: ['M'], description: 'Toggle mute' },
      { keys: ['↑'], description: 'Volume up' },
      { keys: ['↓'], description: 'Volume down' },
    ],
  },
  {
    title: 'Navigation',
    shortcuts: [
      { keys: ['G', 'H'], description: 'Go to Home' },
      { keys: ['G', 'L'], description: 'Go to Library' },
      { keys: ['G', 'S'], description: 'Go to Settings' },
    ],
  },
];

interface KeyboardShortcutsPanelProps {
  isOpen: boolean;
  onClose: () => void;
}

export function KeyboardShortcutsPanel({
  isOpen,
  onClose,
}: KeyboardShortcutsPanelProps) {
  useEffect(() => {
    if (!isOpen) return;
    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key === 'Escape' || e.key === '?') {
        e.preventDefault();
        onClose();
      }
    };
    window.addEventListener('keydown', handleKeyDown);
    return () => window.removeEventListener('keydown', handleKeyDown);
  }, [isOpen, onClose]);

  return (
    <AnimatePresence>
      {isOpen && (
        <>
          {/* Backdrop */}
          <motion.div
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            transition={{ duration: 0.15 }}
            onClick={onClose}
            className="fixed inset-0 z-50 bg-black/60 backdrop-blur-sm"
          />
          {/* Panel */}
          <motion.div
            initial={{ opacity: 0, scale: 0.95, y: 20 }}
            animate={{ opacity: 1, scale: 1, y: 0 }}
            exit={{ opacity: 0, scale: 0.95, y: 20 }}
            transition={{ duration: 0.2, ease: [0.16, 1, 0.3, 1] }}
            className="fixed inset-x-4 top-[10%] bottom-[10%] z-50 mx-auto max-w-2xl overflow-y-auto rounded-2xl border border-border bg-background/95 backdrop-blur-md p-6 shadow-2xl sm:inset-x-auto"
            role="dialog"
            aria-modal="true"
            aria-label="Keyboard Shortcuts"
          >
            {/* Header */}
            <div className="flex items-center justify-between mb-6">
              <h2 className="text-xl font-semibold text-foreground">
                Keyboard Shortcuts
              </h2>
              <button
                onClick={onClose}
                className="p-2 rounded-lg hover:bg-muted transition-colors"
                aria-label="Close"
              >
                <X className="h-5 w-5" />
              </button>
            </div>

            {/* Groups */}
            <div className="space-y-6">
              {shortcutGroups.map((group) => (
                <div key={group.title}>
                  <h3 className="text-xs font-semibold uppercase tracking-wider text-muted-foreground mb-3">
                    {group.title}
                  </h3>
                  <div className="space-y-1">
                    {group.shortcuts.map((shortcut) => (
                      <div
                        key={shortcut.description}
                        className="flex items-center justify-between py-2 px-3 rounded-lg hover:bg-muted/50 transition-colors"
                      >
                        <span className="text-sm text-foreground">
                          {shortcut.description}
                        </span>
                        <div className="flex items-center gap-1">
                          {shortcut.keys.map((key, i) => (
                            <span key={i}>
                              <kbd className="inline-flex h-6 min-w-6 items-center justify-center rounded-md border border-border bg-muted px-1.5 text-[11px] font-medium text-muted-foreground">
                                {key}
                              </kbd>
                              {i < shortcut.keys.length - 1 && (
                                <span className="mx-0.5 text-xs text-muted-foreground">
                                  +
                                </span>
                              )}
                            </span>
                          ))}
                        </div>
                      </div>
                    ))}
                  </div>
                </div>
              ))}
            </div>

            {/* Footer */}
            <div className="mt-6 pt-4 border-t border-border">
              <p className="text-xs text-muted-foreground text-center">
                Press{' '}
                <kbd className="inline-flex h-5 min-w-5 items-center justify-center rounded border border-border bg-muted px-1 text-[10px] font-medium">
                  ?
                </kbd>{' '}
                to toggle this panel
              </p>
            </div>
          </motion.div>
        </>
      )}
    </AnimatePresence>
  );
}