/**
 * Before / after columns / לפני ואחרי בעמודות  (student motion library, id "data-versus")
 * Use: copy this file into your Remotion project and register it in your Root:
 *   <Composition id="LibDataVersus" component={DataVersus} width={1920} height={1080} fps={30}
 *     durationInFrames={144} defaultProps={versusDefaults} />
 * Render transparent: npx remotion render src/index.ts LibDataVersus out.webm --codec=vp9 --pixel-format=yuva420p --image-format=png --props=props.json
 * Change the words / colours / side in props.json (same keys as versusDefaults). A vertical video: width 1080, height 1920.
 */
// ---------------------------------------------------------------- helpers (shared by every library scene)
// Conventions: 1920x1080, 30 fps, transparent background. Sizes follow the frame's short side, so 1080x1920 works too.
// Common props: duration (s), side 'right' | 'left' | 'center', x / y (centre in % of the frame, override side),
// scale, font (a CSS font-family; default Heebo). Time is in seconds; the first and last frames are empty.
import React from 'react';
import {AbsoluteFill, Easing, useCurrentFrame, useVideoConfig} from 'remotion';
import {loadFont as loadHeebo} from '@remotion/google-fonts/Heebo';


const heebo = loadHeebo('normal', {weights: ['400', '500', '700', '800', '900'], subsets: ['hebrew', 'latin']});
/** Hebrew + Latin font (Google "Heebo"). props.font overrides it per scene. */
export const HEEBO = `${heebo.fontFamily}, "Helvetica Neue", Arial, sans-serif`;
export const MONO = 'ui-monospace, "SF Mono", Menlo, Consolas, monospace';

export type Side = 'right' | 'left' | 'center';
export type Base = {duration?: number; side?: Side; x?: number; y?: number; scale?: number; font?: string};

export const clamp01 = (x: number) => Math.min(1, Math.max(0, x));
/** 0..1 progress of t between a and b (seconds) */
export const p01 = (t: number, a: number, b: number) => clamp01((t - a) / (b - a));
export const lerp = (a: number, b: number, k: number) => a + (b - a) * k;
export const outE = Easing.bezier(0.16, 1, 0.3, 1); // fast out, long settle
export const inOut = Easing.bezier(0.65, 0, 0.35, 1);
export const inE = Easing.bezier(0.55, 0, 0.9, 0.45);
export const backOut = (x: number, s = 1.7) => (x <= 0 ? 0 : x >= 1 ? 1 : 1 + (s + 1) * Math.pow(x - 1, 3) + s * Math.pow(x - 1, 2));
/** Damped spring 0 -> 1 starting at t0 (closed form, so any frame computes on its own). */
export const spr = (t: number, t0: number, freq = 16, damp = 9) => {
  const x = t - t0;
  return x <= 0 ? 0 : 1 - Math.exp(-damp * x) * Math.cos(freq * x);
};
/** Deterministic pseudo random 0..1 */
export const rnd = (i: number, seed = 1) => {
  const v = Math.sin(i * 127.1 + seed * 311.7) * 43758.5453;
  return v - Math.floor(v);
};
export const isHe = (s: string) => /[֐-׿]/.test(s);
export const dirOf = (s: string): 'rtl' | 'ltr' => (isHe(s) ? 'rtl' : 'ltr');
/** "#a1b2c3" / "#abc" + alpha -> rgba() */
export const rgba = (hex: string, a = 1) => {
  let h = hex.replace('#', '');
  if (h.length === 3) h = h.split('').map((ch) => ch + ch).join('');
  const n = parseInt(h.slice(0, 6), 16);
  return `rgba(${(n >> 16) & 255},${(n >> 8) & 255},${n & 255},${a})`;
};
export const useT = () => {
  const f = useCurrentFrame();
  const {fps} = useVideoConfig();
  return f / fps;
};
/** 12345 -> "12,345" */
export const fmt = (n: number, sep = ',') => Math.round(n).toString().replace(/\B(?=(\d{3})+(?!\d))/g, sep);

/** Arrive (scale up out of a blur) and leave (shrink into a blur) for a whole group. */
export const life = (t: number, total: number, inDur = 0.45, outDur = 0.35) => {
  const a = p01(t, 0, inDur);
  const z = inOut(p01(t, total - outDur, total));
  return {
    opacity: clamp01(a * 2.2) * (1 - z),
    scale: lerp(0.82, 1, backOut(a, 1.4)) * (1 - 0.08 * z),
    blur: (1 - outE(a)) * 12 + z * 10,
    style: {} as React.CSSProperties,
  };
};
export const lifeStyle = (t: number, total: number, inDur = 0.45, outDur = 0.35): React.CSSProperties => {
  const l = life(t, total, inDur, outDur);
  return {opacity: l.opacity, transform: `scale(${l.scale})`, filter: l.blur > 0.2 ? `blur(${l.blur}px)` : undefined};
};

/**
 * Places a w x h box (design pixels of a 1080-high frame) on its side of the frame and scales it with the frame's
 * short side and props.scale. Children are positioned inside the box.
 */
export const Stage: React.FC<{p: Base; w: number; h: number; children: React.ReactNode; style?: React.CSSProperties; defSide?: Side}> = ({p, w, h, children, style, defSide = 'center'}) => {
  const {width: W, height: H} = useVideoConfig();
  const u = (Math.min(W, H) / 1080) * (p.scale ?? 1);
  const side = p.side ?? defSide;
  const cx = ((p.x ?? (side === 'right' ? 73 : side === 'left' ? 27 : 50)) / 100) * W;
  const cy = ((p.y ?? 50) / 100) * H;
  return (
    <AbsoluteFill style={{pointerEvents: 'none'}}>
      <div style={{position: 'absolute', left: cx - w / 2, top: cy - h / 2, width: w, height: h, transform: `scale(${u})`, transformOrigin: '50% 50%', ...style}}>
        {children}
      </div>
    </AbsoluteFill>
  );
};

/** Soft two-layer drop shadow for cards on any footage */
export const SHADOW = '0 22px 48px rgba(12,12,20,0.22), 0 4px 12px rgba(12,12,20,0.14)';

/** The classic arrow cursor; (x, y) = its tip; press 0..1 = mouse down. */
export const Cursor: React.FC<{x: number; y: number; press?: number; size?: number; fill?: string; stroke?: string}> = ({x, y, press = 0, size = 1.6, fill = '#111', stroke = '#fff'}) => {
  const s = size * (1 - 0.12 * press);
  return (
    <svg viewBox="-2 -2 17 25" width={17 * s * 1.35} height={25 * s * 1.35} style={{position: 'absolute', left: x - 2.7 * s, top: y - 2.7 * s, overflow: 'visible', filter: 'drop-shadow(0 3px 4px rgba(0,0,0,0.35))'}}>
      <path d="M0 0 L0 17.4 L4 13.7 L6.9 20.4 L9.6 19.2 L6.8 12.8 L12.4 12.8 Z" fill={fill} stroke={stroke} strokeWidth={1.1} strokeLinejoin="round" />
    </svg>
  );
};

/** A four-point sparkle centred on (0,0) in a -50..50 box. */
export const SPARK_PATH = 'M0 -50 C 6 -14 14 -6 50 0 C 14 6 6 14 0 50 C -6 14 -14 6 -50 0 C -14 -6 -6 -14 0 -50 Z';
export const Spark: React.FC<{x: number; y: number; size: number; color: string; rotate?: number; opacity?: number; glow?: boolean}> = ({x, y, size, color, rotate = 0, opacity = 1, glow = false}) => (
  <svg viewBox="-50 -50 100 100" width={size} height={size} style={{position: 'absolute', left: x - size / 2, top: y - size / 2, transform: `rotate(${rotate}deg)`, opacity, overflow: 'visible', filter: glow ? `drop-shadow(0 0 ${size * 0.15}px ${color})` : undefined}}>
    <path d={SPARK_PATH} fill={color} />
  </svg>
);
// ---------------------------------------------------------------- the scene

/**
 * Before / after: two columns rise from a baseline (a tall grey "before" and a short bright "after"), their values
 * count, then a curved arrow swoops from one to the other and a badge stamps the difference. 4.8 s.
 * Inspired by "Multiple Bar Chart" and "Before & After: Slider" (Jitter), redesigned: two columns + a swooping
 * arrow + a stamp.
 */
export type VersusProps = Base & {
  before: {label: string; value: number; text: string};
  after: {label: string; value: number; text: string};
  badge: string;
  beforeColor: string;
  afterColor: string;
  afterColor2: string;
};
export const versusDefaults: VersusProps = {
  duration: 4.8,
  side: 'right',
  before: {label: 'לפני', value: 360, text: '6 שעות'},
  after: {label: 'עם AI', value: 20, text: '20 דק׳'},
  badge: 'פי 18 מהר יותר',
  beforeColor: '#C9C6D3',
  afterColor: '#FF5C7A',
  afterColor2: '#FF9A3D',
};

const W = 720;
const H = 600;
const BASE = 500;
const TOPY = 120;
const CW = 190;

export const DataVersus: React.FC<VersusProps> = (props) => {
  const p = {...versusDefaults, ...props};
  const t = useT();
  const font = p.font ?? HEEBO;
  const rtl = dirOf(p.before.label + p.after.label) === 'rtl';
  const max = Math.max(p.before.value, p.after.value);
  const hb = ((BASE - TOPY) * p.before.value) / max;
  const ha = Math.max(26, ((BASE - TOPY) * p.after.value) / max);
  const gb = outE(p01(t, 0.35, 1.4));
  const ga = outE(p01(t, 1.2, 1.8));
  const xb = rtl ? W - 110 - CW : 110; // "before" reads first
  const xa = rtl ? 110 : W - 110 - CW;
  const arrow = inOut(p01(t, 2.0, 2.6));
  const badge = spr(t, 2.55, 15, 8);
  const base = outE(p01(t, 0.1, 0.5));
  // arrow from the top of "before" to the top of "after"
  const ax0 = rtl ? xb - 18 : xb + CW + 18; // from the inner top corner of "before"
  const ay0 = BASE - hb + 40;
  const ax1 = xa + CW / 2; // down onto the "after" value
  const ay1 = BASE - ha - 80;
  const cx = lerp(ax0, ax1, 0.75);
  const cy = Math.min(ay0, ay1) - 30;
  const pathD = `M${ax0} ${ay0} Q ${cx} ${cy} ${ax1} ${ay1}`;
  const ang = Math.atan2(ay1 - cy, ax1 - cx);
  const col = (x: number, h: number, g: number, bg: string, label: string, text: string, k: number) => (
    <>
      <div style={{position: 'absolute', left: x, top: BASE - h * g, width: CW, height: h * g, borderRadius: '28px 28px 8px 8px', background: bg,
        boxShadow: '0 14px 30px rgba(12,12,20,0.14)'}} />
      <div style={{position: 'absolute', left: x - 30, width: CW + 60, top: BASE - h * g - 62, textAlign: 'center', fontSize: 40, fontWeight: 900, color: '#16151a', opacity: k, direction: rtl ? 'rtl' : 'ltr'}}>{text}</div>
      <div style={{position: 'absolute', left: x - 30, width: CW + 60, top: BASE + 16, textAlign: 'center', fontSize: 32, fontWeight: 700, color: 'rgba(22,21,26,0.6)', opacity: base}}>{label}</div>
    </>
  );
  return (
    <Stage p={p} w={W} h={H} defSide="right">
      <div style={{position: 'absolute', inset: 0, ...lifeStyle(t, p.duration!, 0.2, 0.4), fontFamily: font}}>
        <div style={{position: 'absolute', left: 60, right: 60, top: BASE, height: 4, borderRadius: 4, background: 'rgba(22,21,26,0.2)', transform: `scaleX(${base})`}} />
        {col(xb, hb, gb, `linear-gradient(180deg, ${p.beforeColor}, ${rgba(p.beforeColor, 0.8)})`, p.before.label, p.before.text, p01(t, 1.0, 1.3))}
        {col(xa, ha, ga, `linear-gradient(180deg, ${p.afterColor2}, ${p.afterColor})`, p.after.label, p.after.text, p01(t, 1.6, 1.9))}
        <svg width={W} height={H} style={{position: 'absolute', inset: 0, overflow: 'visible'}}>
          <path d={pathD} fill="none" stroke="#16151a" strokeWidth={5} strokeLinecap="round" strokeDasharray="1" pathLength={1} strokeDashoffset={1 - arrow} />
          {arrow > 0.97 && (
            <path d="M-22 -14 L0 0 L-22 14" fill="none" stroke="#16151a" strokeWidth={5} strokeLinecap="round" strokeLinejoin="round" transform={`translate(${ax1} ${ay1}) rotate(${(ang * 180) / Math.PI})`} />
          )}
        </svg>
        {t > 2.5 && (
          <div style={{position: 'absolute', left: (ax0 + ax1) / 2 - 170, top: cy - 120, width: 340, textAlign: 'center'}}>
            <span style={{display: 'inline-block', padding: '12px 26px', borderRadius: 18, background: '#16151a', color: '#fff', fontSize: 36, fontWeight: 900,
              transform: `scale(${badge}) rotate(${lerp(-12, -3, Math.min(1, badge))}deg)`, boxShadow: '0 10px 24px rgba(0,0,0,0.25)', whiteSpace: 'nowrap'}}>{p.badge}</span>
          </div>
        )}
      </div>
    </Stage>
  );
};

export const meta = {id: 'LibDataVersus', component: DataVersus, defaults: versusDefaults};