/**
 * PlayerBarProgress — Seek bar with 60fps (transform-based)
 * KŌDŌ gradient: --chart-1 → --chart-2
 */

import { useRef, useEffect } from 'react';
import { cn } from '@/lib/utils';

interface PlayerBarProgressProps {
  currentTime: number;
  duration: number;
  onSeek: (pct: number) => void;
  className?: string;
}

export function PlayerBarProgress({
  currentTime,
  duration,
  onSeek,
  className,
}: PlayerBarProgressProps) {
  const barRef = useRef<HTMLDivElement>(null);
  const pct = duration > 0 ? Math.max(0, Math.min(1, currentTime / duration)) : 0;

  const handleClick = (e: React.MouseEvent<HTMLDivElement>) => {
    if (!barRef.current) return;
    const rect = barRef.current.getBoundingClientRect();
    const x = e.clientX - rect.left;
    onSeek(Math.max(0, Math.min(1, x / rect.width)));
  };

  return (
    <div
      ref={barRef}
      role="slider"
      aria-label="Progression"
      aria-valuemin={0}
      aria-valuemax={duration}
      aria-valuenow={currentTime}
      tabIndex={0}
      className={cn(
        'absolute bottom-0 left-0 right-0 h-1.5 z-20 cursor-pointer',
        'bg-[var(--sumi-border-default)] hover:bg-[var(--sumi-border-strong)] transition-colors duration-[var(--sumi-duration-fast)]',
        className,
      )}
      onClick={handleClick}
    >
      <div
        className="h-full rounded-r bg-[var(--sumi-accent)] transition-[transform] duration-75 ease-out will-change-transform"
        style={{ transform: `scaleX(${pct})`, transformOrigin: 'left' }}
      />
    </div>
  );
}