/**
 * Bar chart race / מרוץ עמודות  (student motion library, id "data-bar-race")
 * Use: copy this file into your Remotion project and register it in your Root:
 *   <Composition id="LibDataBarRace" component={DataBarRace} width={1920} height={1080} fps={30}
 *     durationInFrames={162} defaultProps={barRaceDefaults} />
 * Render transparent: npx remotion render src/index.ts LibDataBarRace out.webm --codec=vp9 --pixel-format=yuva420p --image-format=png --props=props.json
 * Change the words / colours / side in props.json (same keys as barRaceDefaults). 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

/**
 * Bar race: five bars grow in, then the values move through the years and the bars overtake each other (they glide
 * to their new rank), the year ticks in the corner and the leader gets a crown. 5.4 s.
 * Inspired by bar chart races (amCharts demo) and "Horizontal Bar Chart" (Jitter), redesigned: rounded bars, a crown
 * on the leader, RTL-first.
 */
export type BarRaceProps = Base & {
  title: string;
  labels: string[];
  colors: string[];
  years: string[];
  values: number[][]; // values[year][bar]
  unit: string;
};
export const barRaceDefaults: BarRaceProps = {
  duration: 5.4,
  side: 'right',
  title: 'איפה הקהל שלי (דוגמה)',
  labels: ['סרטונים קצרים', 'פודקאסט', 'ניוזלטר', 'לייבים', 'בלוג'],
  colors: ['#FF5C7A', '#7C5CFF', '#22C3A6', '#FFB020', '#3B82F6'],
  years: ['2023', '2024', '2025', '2026'],
  values: [
    [320, 410, 380, 120, 450],
    [610, 520, 400, 260, 430],
    [980, 560, 420, 610, 390],
    [1450, 600, 440, 820, 360],
  ],
  unit: 'K',
};

const W = 920;
const ROW = 88;

export const DataBarRace: React.FC<BarRaceProps> = (props) => {
  const p = {...barRaceDefaults, ...props};
  const t = useT();
  const font = p.font ?? HEEBO;
  const rtl = dirOf(p.title + p.labels.join('')) === 'rtl';
  const n = p.labels.length;
  const ky = p.years.length;
  const T0 = 0.9;
  const STEP = 1.15;
  const grow = outE(p01(t, 0.25, 1.0));
  // value of bar i at time s (eased between year keyframes)
  const val = (s: number, i: number) => {
    const u = Math.max(0, (s - T0) / STEP);
    const y = Math.min(ky - 1, Math.floor(u));
    const f = y >= ky - 1 ? 0 : inOut(Math.min(1, u - y));
    return lerp(p.values[y][i], p.values[Math.min(ky - 1, y + 1)][i], f);
  };
  const rankAt = (s: number) => {
    const order = Array.from({length: n}, (_, i) => i).sort((a, b) => val(s, b) - val(s, a));
    const r: number[] = [];
    order.forEach((i, k) => (r[i] = k));
    return r;
  };
  // smooth rank: average of the ranks over the last 0.3 s
  const SM = 8;
  const pos = Array.from({length: n}, () => 0);
  for (let k = 0; k < SM; k++) {
    const r = rankAt(t - (k / (SM - 1)) * 0.3);
    r.forEach((v, i) => (pos[i] += v / SM));
  }
  const vals = Array.from({length: n}, (_, i) => val(t, i) * grow);
  const max = Math.max(...Array.from({length: n}, (_, i) => val(t, i)));
  const year = p.years[Math.min(ky - 1, Math.max(0, Math.round((t - T0) / STEP)))];
  const leader = rankAt(t).indexOf(0);
  const LBL = 290;
  const BAR = W - LBL - 190;
  const H = 110 + n * ROW;
  return (
    <Stage p={p} w={W} h={H} defSide="right">
      <div style={{position: 'absolute', inset: 0, ...lifeStyle(t, p.duration!, 0.3, 0.4), fontFamily: font, direction: rtl ? 'rtl' : 'ltr'}}>
        <div style={{position: 'absolute', inset: 0, borderRadius: 40, background: 'rgba(255,255,255,0.94)', boxShadow: '0 22px 48px rgba(12,12,20,0.2)'}} />
        <div style={{position: 'absolute', top: 26, [rtl ? 'right' : 'left']: 40, fontSize: 36, fontWeight: 800, color: '#16151a'}}>{p.title}</div>
        <div style={{position: 'absolute', top: 14, [rtl ? 'left' : 'right']: 36, fontSize: 64, fontWeight: 900, color: rgba('#16151a', 0.14), direction: 'ltr'}}>{year}</div>
        {p.labels.map((l, i) => {
          const y = 100 + pos[i] * ROW;
          const w = (vals[i] / max) * BAR;
          return (
            <div key={i} style={{position: 'absolute', top: y, left: 0, right: 0, height: ROW - 18}}>
              <div style={{position: 'absolute', top: 0, bottom: 0, [rtl ? 'right' : 'left']: 40, width: LBL - 50, display: 'flex', alignItems: 'center', fontSize: 30, fontWeight: 700, color: '#16151a', whiteSpace: 'nowrap'}}>
                {l}
              </div>
              <div style={{position: 'absolute', top: 6, bottom: 6, [rtl ? 'right' : 'left']: LBL, width: Math.max(8, w), borderRadius: 16,
                background: `linear-gradient(${rtl ? 270 : 90}deg, ${p.colors[i % p.colors.length]}, ${rgba(p.colors[i % p.colors.length], 0.75)})`}} />
              <div style={{position: 'absolute', top: 0, bottom: 0, [rtl ? 'right' : 'left']: LBL + Math.max(8, w) + 14, display: 'flex', alignItems: 'center', fontSize: 28, fontWeight: 800,
                color: rgba('#16151a', 0.75), direction: 'ltr', fontVariantNumeric: 'tabular-nums', opacity: grow}}>
                {fmt(vals[i])}
                {p.unit}
                {i === leader && t > T0 + 0.3 ? ' 👑' : ''}
              </div>
            </div>
          );
        })}
      </div>
    </Stage>
  );
};

export const meta = {id: 'LibDataBarRace', component: DataBarRace, defaults: barRaceDefaults};