'use client';

import { motion, useTransform, type MotionValue } from 'framer-motion';
import { Wordmark } from '@/components/primitives/Wordmark';

// One beat of the pinned conversation. Not a card on a page — the whole frame
// is the message: the reader's situation set large on the light ground, then
// creeer's answer set large on azul-profundo, the section's own background
// turning over with it.
//
// One thing per frame, never both. The two halves share a grid cell so the
// answer takes the stage the question leaves instead of stacking under it, and
// they arrive from opposite sides so the swap reads as a relay.
//
// The cards are driven by STATE, not by scroll position. Mapping opacity
// straight onto scroll made every intermediate position a valid frame, so
// stopping mid-swipe left the answer as a half-transparent slab that read as a
// rendering fault. Scroll now only picks the beat; the frame animates to it
// over time and always lands somewhere finished, wherever the reader lets go.
//
// Every scene stays mounted. Rendering only the active one would animate more
// cheaply and would strip five sixths of the section out of the static export.

const EASE = [0.22, 1, 0.36, 1] as const;

export function EscenaDialogo({
  i,
  total,
  progreso,
  activa,
  respondida,
  n,
  name,
  situacion,
  respuesta,
}: {
  i: number;
  total: number;
  progreso: MotionValue<number>;
  activa: boolean;
  respondida: boolean;
  n: string;
  name: string;
  situacion: string;
  respuesta: string;
}) {
  const paso = 1 / total;
  // The one thing still tied to scroll. A drifting numeral never looks broken
  // at any position it can be caught in, so it costs nothing and keeps the
  // stage from feeling frozen between beats.
  const cifraY = useTransform(progreso, [i * paso - paso, (i + 1) * paso + paso], [70, -70]);

  return (
    <motion.li
      data-activa={activa ? 'true' : 'false'}
      animate={{ opacity: activa ? 1 : 0 }}
      transition={{ duration: 0.4, ease: EASE }}
      className="absolute inset-0 flex items-center"
      style={{ pointerEvents: activa ? 'auto' : 'none' }}
    >
      <motion.span
        aria-hidden="true"
        style={{ y: cifraY }}
        animate={{ color: respondida ? 'rgba(255,255,255,0.06)' : 'rgba(10,29,61,0.05)' }}
        transition={{ duration: 0.5, ease: EASE }}
        className="pointer-events-none absolute right-0 top-8 select-none font-sans font-black leading-none text-[11rem] md:text-[22rem]"
      >
        {n}
      </motion.span>

      <div className="relative grid w-full">
        {/* The reader's situation. */}
        <motion.div
          animate={{ opacity: respondida ? 0 : 1, y: respondida ? -60 : 0 }}
          transition={{ duration: 0.5, ease: EASE }}
          style={{ pointerEvents: respondida ? 'none' : 'auto' }}
          className="col-start-1 row-start-1 max-w-5xl"
        >
          <p className="text-[0.7rem] font-black uppercase tracking-[0.34em] text-dorado md:text-xs">
            {n} · {name}
          </p>
          <p className="mt-6 font-sans font-black leading-[0.98] text-azul-profundo text-4xl md:text-6xl lg:text-7xl">
            «{situacion}»
          </p>
        </motion.div>

        {/* creeer's answer, on the navy the whole frame turns to. The point
            label repeats here on purpose: with the question gone from the
            screen, it is the only thing tying the answer to what it answers. */}
        <motion.div
          animate={{ opacity: respondida ? 1 : 0, y: respondida ? 0 : 60 }}
          transition={{ duration: 0.55, ease: EASE }}
          style={{ pointerEvents: respondida ? 'auto' : 'none' }}
          className="col-start-1 row-start-1 max-w-5xl"
        >
          <div className="flex items-center gap-4">
            <span aria-hidden="true" className="h-[3px] w-10 rounded bg-dorado" />
            <p className="text-[0.7rem] font-black uppercase tracking-[0.34em] text-dorado md:text-xs">
              {n} · {name}
            </p>
          </div>
          <p className="mt-6 font-sans font-bold leading-[1.06] text-white text-3xl md:text-5xl lg:text-[3.6rem]">
            {respuesta}
          </p>
          <div className="mt-10">
            <Wordmark size="sm" onDark />
          </div>
        </motion.div>
      </div>
    </motion.li>
  );
}