import { AnimatePresence, motion } from 'framer-motion';
import { Check, CloudUpload, AlertCircle, type LucideIcon } from 'lucide-react';
import { cn } from '@/lib/utils';

interface SaveState {
  icon: LucideIcon;
  text: string;
  cls: string;
}

const STATES: Record<string, SaveState> = {
  saving: { icon: CloudUpload, text: 'Saving…',     cls: 'text-muted-foreground border-border/70 bg-muted/40' },
  saved:  { icon: Check,       text: 'Saved',       cls: 'text-emerald-600 dark:text-emerald-300 border-emerald-500/30 bg-emerald-500/10' },
  error:  { icon: AlertCircle, text: 'Save failed', cls: 'text-rose-500 dark:text-rose-300 border-rose-500/35 bg-rose-500/10' },
};

/**
 * Tiny animated pill that reflects auto-save state. Renders nothing while idle —
 * the page communicates "changes save automatically" once, statically.
 */
export function SaveStatus({ status, className }: { status?: string | null; className?: string }) {
  const state = status ? STATES[status] : undefined;
  return (
    <AnimatePresence mode="wait">
      {state && (
        <motion.span
          key={status}
          initial={{ opacity: 0, y: -2 }}
          animate={{ opacity: 1, y: 0 }}
          exit={{ opacity: 0, y: 2 }}
          transition={{ duration: 0.15 }}
          className={cn(
            'inline-flex items-center gap-1.5 rounded-full border px-2.5 py-1 text-[11px] font-medium',
            state.cls,
            className,
          )}
        >
          <state.icon className={cn('h-3 w-3', status === 'saving' && 'animate-pulse')} />
          {state.text}
        </motion.span>
      )}
    </AnimatePresence>
  );
}