// ===== demos/transition/wipe-transitions/BlindsSlice.tsx =====
// blinds-slice｜百叶窗切条错峰擦除
// FakeDashboard A → B。12 根 160px 竖条，从左到右 delay=列号×2f，
// 每条 10f 内完成翻换：条内 A scaleX 1→0（origin 左缘）与 B scaleX 0→1
// （origin 右缘）共用同一进度 p（Easing.in(cubic)），交接缝恒等于
// x+160(1-p)，数学上无露底。缝上亮线（柔光+暗描边+白核）随波扫过。
// 波 20–52f；52f 起摘罩（整页 B 直出、条结构与亮线全部卸载），
// 52–150f 真静止 98f ≥ 40f。帧确定，无随机源。
import React from 'react';
import { AbsoluteFill, useCurrentFrame, interpolate, Easing } from 'remotion';
import { FakeDashboard } from '../../_fixtures/Fixtures';

const STRIPS = 12;
const W = 160; // 每条宽 12×160 = 1920
const WAVE_START = 20;
const STAGGER = 2; // 列号 × 2f
const FLIP = 10; // 每条 10f 完成翻换
const WAVE_END = WAVE_START + (STRIPS - 1) * STAGGER + FLIP; // 52

// 条内某页的切片：外层 160 宽裁剪，内层整页 1920 负 margin 对位
const Slice: React.FC<{ x: number; variant: 'A' | 'B' }> = ({ x, variant }) => (
  <div style={{ width: 1920, height: 1080, marginLeft: -x }}>
    <FakeDashboard variant={variant} />
  </div>
);

export const BlindsSlice: React.FC = () => {
  const frame = useCurrentFrame();

  // 摘罩：波完成后条结构全部卸载，B 整页直出
  if (frame >= WAVE_END) {
    return (
      <AbsoluteFill style={{ background: '#ececea' }}>
        <FakeDashboard variant="B" />
      </AbsoluteFill>
    );
  }

  const seams: { x: number; opacity: number }[] = [];

  const strips = Array.from({ length: STRIPS }).map((_, i) => {
    const x = i * W;
    const start = WAVE_START + i * STAGGER;
    const end = start + FLIP;

    // 未开始：纯 A 切片；已完成：纯 B 切片
    if (frame < start) {
      return (
        <div key={i} style={{ position: 'absolute', left: x, top: 0, width: W, height: 1080, overflow: 'hidden' }}>
          <Slice x={x} variant="A" />
        </div>
      );
    }
    if (frame >= end) {
      return (
        <div key={i} style={{ position: 'absolute', left: x, top: 0, width: W, height: 1080, overflow: 'hidden' }}>
          <Slice x={x} variant="B" />
        </div>
      );
    }

    // 翻换中：A、B 共用同一进度 p——A 宽 160(1-p) 靠左，B 宽 160p 靠右，
    // 交接点恒为 x+160(1-p)，无露底
    const p = interpolate(frame, [start, end], [0, 1], {
      extrapolateLeft: 'clamp',
      extrapolateRight: 'clamp',
      easing: Easing.in(Easing.cubic),
    });

    // 缝亮线：进出各 2f 线性淡入淡出
    const seamOpacity = Math.min(
      interpolate(frame, [start, start + 2], [0, 1], { extrapolateLeft: 'clamp', extrapolateRight: 'clamp' }),
      interpolate(frame, [end - 2, end], [1, 0], { extrapolateLeft: 'clamp', extrapolateRight: 'clamp' }),
    );
    seams.push({ x: x + W * (1 - p), opacity: seamOpacity });

    return (
      <div key={i} style={{ position: 'absolute', left: x, top: 0, width: W, height: 1080, overflow: 'hidden' }}>
        {/* A：向左缘收缩 */}
        <div style={{ position: 'absolute', inset: 0, overflow: 'hidden', transform: `scaleX(${1 - p})`, transformOrigin: '0% 50%' }}>
          <Slice x={x} variant="A" />
        </div>
        {/* B：从右缘展开 */}
        <div style={{ position: 'absolute', inset: 0, overflow: 'hidden', transform: `scaleX(${p})`, transformOrigin: '100% 50%' }}>
          <Slice x={x} variant="B" />
        </div>
      </div>
    );
  });

  return (
    <AbsoluteFill style={{ background: '#ececea' }}>
      {strips}
      {/* 缝亮线：白底判例——纯提亮不可见，柔光 + 暗描边 + 白核三层 */}
      {seams.length > 0 && (
        <svg width={1920} height={1080} style={{ position: 'absolute', inset: 0, pointerEvents: 'none' }}>
          {seams.map((s, i) => (
            <g key={i} opacity={s.opacity}>
              <line x1={s.x} y1={0} x2={s.x} y2={1080} stroke="rgba(255,255,255,0.45)" strokeWidth={16} />
              <line x1={s.x} y1={0} x2={s.x} y2={1080} stroke="rgba(0,0,0,0.55)" strokeWidth={6} />
              <line x1={s.x} y1={0} x2={s.x} y2={1080} stroke="rgba(255,255,255,0.95)" strokeWidth={3} />
            </g>
          ))}
        </svg>
      )}
    </AbsoluteFill>
  );
};


// ===== demos/transition/wipe-transitions/ClockWipe.tsx =====
// clock-wipe｜时钟扫描擦除
// FakeDashboard A → B。30–90f 一根隐形雷达指针从 12 点方向顺时针扫一圈，
// B 页在上层用大扇形 clip-path polygon 逐帧张开；扫描沿带亮线（白核+暗描边+柔光）。
// 90–96f 亮线淡出，96f 起摘罩（B 直接满屏、无 clip-path、亮线卸载），
// 96–150f 真静止 54f ≥ 40f。帧确定，无随机。
import React from 'react';
import { AbsoluteFill, useCurrentFrame, interpolate } from 'remotion';
import { FakeDashboard } from '../../_fixtures/Fixtures';

const CX = 960;
const CY = 540;
const R = 1400; // 大于中心到角的距离 ~1101，扇形完全盖角
const SEGS = 72; // 顶点数固定且够密，避免锯齿跳变

// 12 点方向为 0°，顺时针（屏幕坐标 y 向下）
const polar = (deg: number, r: number): [number, number] => {
  const a = (deg * Math.PI) / 180;
  return [CX + r * Math.sin(a), CY - r * Math.cos(a)];
};

const fanClip = (theta: number): string => {
  const pts: string[] = [`${CX}px ${CY}px`];
  for (let i = 0; i <= SEGS; i++) {
    const [x, y] = polar((theta * i) / SEGS, R);
    pts.push(`${x.toFixed(1)}px ${y.toFixed(1)}px`);
  }
  return `polygon(${pts.join(', ')})`;
};

export const ClockWipe: React.FC = () => {
  const frame = useCurrentFrame();

  // 30–90f 指针 0→360°，linear（时钟扫描要匀速才像雷达）
  const theta = interpolate(frame, [30, 90], [0, 360], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });
  const wipeDone = frame >= 90;

  // 亮线：扫描期间常亮，90–96f 线性淡出，96f 起条件卸载（摘罩判例）
  const lineOpacity = interpolate(frame, [90, 96], [1, 0], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });
  const lineMounted = frame >= 30 && frame < 96;

  const [x2, y2] = polar(theta, R);

  return (
    <AbsoluteFill style={{ background: '#ececea' }}>
      {/* 底层：A 页。擦完后卸载（上层 B 已满屏） */}
      {!wipeDone && (
        <AbsoluteFill>
          <FakeDashboard variant="A" />
        </AbsoluteFill>
      )}

      {/* 上层：B 页。扫描期挂扇形 clip-path，擦完后摘罩直出 */}
      {frame >= 30 && (
        <AbsoluteFill style={wipeDone ? undefined : { clipPath: fanClip(theta) }}>
          <FakeDashboard variant="B" />
        </AbsoluteFill>
      )}

      {/* 扫描亮线：柔光 + 暗描边 + 白核，从屏心指向当前角度 */}
      {lineMounted && (
        <svg
          width={1920}
          height={1080}
          style={{ position: 'absolute', inset: 0, opacity: lineOpacity, pointerEvents: 'none' }}
        >
          {/* 柔光带（QA 后加码 1.5x：白底看不清就加深+加宽） */}
          <line x1={CX} y1={CY} x2={x2} y2={y2} stroke="rgba(255,255,255,0.35)" strokeWidth={26} strokeLinecap="round" />
          <line x1={CX} y1={CY} x2={x2} y2={y2} stroke="rgba(255,255,255,0.60)" strokeWidth={13} strokeLinecap="round" />
          {/* 暗描边：白底上"提亮"不可见，加深保证浅色区也读得出指针 */}
          <line x1={CX} y1={CY} x2={x2} y2={y2} stroke="rgba(0,0,0,0.55)" strokeWidth={9} strokeLinecap="round" />
          {/* 白核 */}
          <line x1={CX} y1={CY} x2={x2} y2={y2} stroke="rgba(255,255,255,0.95)" strokeWidth={4} strokeLinecap="round" />
        </svg>
      )}
    </AbsoluteFill>
  );
};