Sprout

// <EmptySprout>: a seedling in a terracotta pot being watered. Drops fall from a tilted watering
// can and ripple the soil, and the sprout's two leaves sway in the sun. For "create your first…"
// and getting-started screens. Animated.

import { EmptyStateFrame, type EmptyStateProps } from './empty-state';
import styles from './empty-sprout.module.css';

export const emptySproutTheme = {
  pot: '#d9825b',
  potShade: '#b8673f',
  soil: '#6b4a3a',
  leaf: '#6cbf6a',
  leafShade: '#4f9a58',
  can: '#9cc9e3',
  canShade: '#7fb2d2',
  water: '#7fb6d4',
  sun: '#f2c14e',
};
export type EmptySproutTheme = typeof emptySproutTheme;

/** A seedling in a pot being watered: for getting-started screens. */
export function EmptySprout(props: EmptyStateProps<EmptySproutTheme>) {
  return (
    <EmptyStateFrame
      {...props}
      defaultTheme={emptySproutTheme}
      art={
        <>
          {/* Sun with slowly turning rays */}
          <g transform="translate(196 40)">
            <g className={styles.rays} stroke="var(--sun)" strokeWidth="2.4" strokeLinecap="round">
              {[0, 45, 90, 135, 180, 225, 270, 315].map(a => (
                <path key={a} d="M0 -19 V-25" transform={`rotate(${a})`} />
              ))}
            </g>
            <circle r="13" fill="var(--sun)" />
          </g>

          {/* Watering can, tipped toward the pot */}
          <g transform="translate(62 46) rotate(24)">
            <path d="M22 -2 L50 -16 L52 -12 L26 4 Z" fill="var(--can-shade)" />
            <ellipse cx="51" cy="-14" rx="3" ry="5" transform="rotate(-27 51 -14)" fill="var(--can-shade)" />
            <path d="M-20 -14 H22 V18 Q22 24 16 24 H-14 Q-20 24 -20 18 Z" fill="var(--can)" />
            <path d="M-16 -14 Q-2 -34 14 -14" fill="none" stroke="var(--can-shade)" strokeWidth="4" strokeLinecap="round" />
            <path d="M-20 -6 H22" stroke="var(--can-shade)" strokeWidth="2" />
          </g>

          {/* Drops from the spout to the soil, staggered */}
          <g fill="var(--water)">
            {[0, 1, 2].map(i => (
              // Position on the group; the path's own transform is the CSS fall.
              <g key={i} transform={`translate(${113 + i * 3} 56)`}>
                <path className={styles.drop} style={{ animationDelay: `${-i * 0.5}s` }} d="M0 -6 Q4.5 0 0 4 Q-4.5 0 0 -6 Z" />
              </g>
            ))}
          </g>

          {/* Pot and soil */}
          <ellipse cx="120" cy="166" rx="40" ry="5" fill="#000" opacity="0.08" />
          <path d="M92 124 H148 L141 164 H99 Z" fill="var(--pot)" />
          <path d="M120 124 H148 L141 164 H120 Z" fill="var(--pot-shade)" opacity="0.35" />
          <rect x="88" y="114" width="64" height="12" rx="3" fill="var(--pot)" />
          <ellipse cx="120" cy="116" rx="28" ry="4" fill="var(--soil)" />
          <ellipse className={styles.ripple} cx="112" cy="116" rx="8" ry="1.6" fill="none" stroke="var(--water)" strokeWidth="1.2" />

          {/* Sprout: a curved stem and two leaves that sway from the base */}
          <g className={styles.sprout}>
            <path d="M120 116 C120 104 118 96 121 86" fill="none" stroke="var(--leaf-shade)" strokeWidth="3" strokeLinecap="round" />
            <g className={styles.leftLeaf}>
              <path d="M120 92 C110 80 96 82 92 90 C100 96 112 96 120 92 Z" fill="var(--leaf)" />
              <path d="M120 92 Q106 88 96 89" fill="none" stroke="var(--leaf-shade)" strokeWidth="1.2" />
            </g>
            <g className={styles.rightLeaf}>
              <path d="M121 86 C130 72 146 72 150 80 C142 88 130 90 121 86 Z" fill="var(--leaf)" />
              <path d="M121 86 Q136 80 146 79" fill="none" stroke="var(--leaf-shade)" strokeWidth="1.2" />
            </g>
          </g>
        </>
      }
    />
  );
}

/* Drops fall from the spout every 1.5s, each ripple the soil as it lands; the sprout sways and
   its leaves open and close a touch; the sun's rays turn slowly. */
.drop {
  opacity: 0;
  animation: drop 1.5s ease-in infinite;
}

.ripple {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  animation: ripple 1.5s ease-out infinite;
  animation-delay: -0.6s;
}

.sprout {
  transform-box: fill-box;
  transform-origin: 50% 100%;
  animation: sway 3.2s ease-in-out infinite alternate;
}
.leftLeaf {
  transform-box: fill-box;
  transform-origin: 100% 80%;
  animation: leftLeaf 2.4s ease-in-out infinite alternate;
}
.rightLeaf {
  transform-box: fill-box;
  transform-origin: 0% 80%;
  animation: rightLeaf 2.4s ease-in-out infinite alternate;
  animation-delay: -1.2s;
}

.rays {
  transform-box: fill-box;
  transform-origin: center;
  animation: turn 24s linear infinite;
}

@keyframes drop {
  0%   { transform: translate(0, 0); opacity: 0; }
  10%  { opacity: 1; }
  60%  { transform: translate(-4px, 54px); opacity: 1; }
  64%, 100% { transform: translate(-4px, 54px); opacity: 0; }
}
@keyframes ripple {
  0%, 55% { transform: scale(0.3); opacity: 0; }
  62%     { opacity: 0.9; }
  100%    { transform: scale(1.6); opacity: 0; }
}
@keyframes sway {
  from { transform: rotate(-4deg); }
  to   { transform: rotate(4deg); }
}
@keyframes leftLeaf {
  from { transform: rotate(-6deg); }
  to   { transform: rotate(5deg); }
}
@keyframes rightLeaf {
  from { transform: rotate(6deg); }
  to   { transform: rotate(-5deg); }
}
@keyframes turn { to { transform: rotate(360deg); } }

// Shared frame for every empty state: an illustration with your message underneath.
// Empty states are pure server components: no client JavaScript.

import type { CSSProperties, ReactNode } from 'react';
import styles from './empty-state.module.css';

/** Props every empty state accepts. `T` is the illustration's theme (colour tokens). */
export type EmptyStateProps<T> = {
  /** Override any of the illustration's colours. */
  theme?: Partial<T>;
  /** Freeze the animation. */
  paused?: boolean;
  /** Illustration width in pixels (default 240). It scales down to fit narrow containers. */
  size?: number;
  className?: string;
  style?: CSSProperties;
  /** Your message and actions, shown under the illustration. */
  children?: ReactNode;
};

// skyTop → --sky-top, leaf1 → --leaf-1
const toVar = (key: string) => `--${key.replace(/([A-Z])/g, '-$1').replace(/(\d+)/g, '-$1').toLowerCase()}`;

type EmptyStateFrameProps<T extends Record<string, string>> = EmptyStateProps<T> & {
  defaultTheme: T;
  /** SVG content drawn in a 240×180 box. */
  art: ReactNode;
};

export function EmptyStateFrame<T extends Record<string, string>>({
  defaultTheme,
  art,
  theme,
  paused,
  size = 240,
  className,
  style,
  children,
}: EmptyStateFrameProps<T>) {
  const vars: Record<string, string> = {};
  for (const [key, value] of Object.entries({ ...defaultTheme, ...theme })) {
    if (value) vars[toVar(key)] = value;
  }
  const classes = [styles.root, paused && styles.paused, className].filter(Boolean).join(' ');

  return (
    <div className={classes} style={{ ...vars, ...style } as CSSProperties}>
      <svg className={styles.art} width={size} viewBox="0 0 240 180" aria-hidden="true" focusable="false">
        {art}
      </svg>
      {children && <div className={styles.content}>{children}</div>}
    </div>
  );
}

.root {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
  text-align: center;
}

.art {
  display: block;
  max-width: 100%;
  height: auto;
  overflow: visible;
}

.content { max-width: 360px; }

.paused * { animation-play-state: paused !important; }

@media (prefers-reduced-motion: reduce) {
  .art * { animation: none !important; }
}