import React, { useState, useCallback, CSSProperties } from 'react';
import { useEditor } from '@craftjs/core';
import {
  GRADIENTS,
  SIZE_PRESETS,
  ASPECT_RATIOS,
  SPACING_PRESETS,
  BORDER_STYLES,
} from '../../../constants/presets';
import { uploadAsset } from '../../../utils/assets';

/* ---------- Helper: auto text color for bg ---------- */
export function autoTextColor(bg: string): string {
  if (bg.startsWith('#')) {
    const hex = bg.replace('#', '');
    const r = parseInt(hex.substring(0, 2), 16);
    const g = parseInt(hex.substring(2, 4), 16);
    const b = parseInt(hex.substring(4, 6), 16);
    const luminance = (0.299 * r + 0.587 * g + 0.114 * b) / 255;
    return luminance > 0.5 ? '#18181b' : '#ffffff';
  }
  return '#ffffff';
}

/* ---------- Helper: upload to WHP ----------
   Thin re-export over the shared `uploadAsset` util (`@/utils/assets`) so
   the existing callers importing `uploadToWhp` from here keep working
   unchanged. */
export const uploadToWhp = uploadAsset;

/* ---------- Shared inline styles ---------- */
export const labelStyle: CSSProperties = { fontSize: 11, color: '#a1a1aa', display: 'block', marginBottom: 4, textTransform: 'capitalize' };
export const inputStyle: CSSProperties = { width: '100%', padding: '4px 8px', background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 4, fontSize: 12, boxSizing: 'border-box' };
export const smallInputStyle: CSSProperties = { ...inputStyle, fontSize: 11, padding: '3px 6px' };
export const btnActiveStyle = (active: boolean): CSSProperties => ({
  flex: 1, padding: '5px 4px', fontSize: 11, borderRadius: 4, cursor: 'pointer',
  border: '1px solid #3f3f46',
  background: active ? '#3b82f6' : '#27272a',
  color: active ? '#fff' : '#a1a1aa',
  fontWeight: active ? 600 : 400,
});
export const sectionGap: CSSProperties = { marginBottom: 14 };

/* ---------- Reusable sub-components ---------- */

interface SectionLabelProps { children: React.ReactNode; }
export const SectionLabel: React.FC<SectionLabelProps> = ({ children }) => (
  <label className="guided-section-label">{children}</label>
);

interface ColorSwatchGridProps {
  colors: { label: string; value: string }[];
  activeValue: string | undefined;
  onSelect: (value: string) => void;
}
export const ColorSwatchGrid: React.FC<ColorSwatchGridProps> = ({ colors, activeValue, onSelect }) => (
  <div>
    <div style={{ display: 'flex', gap: 6, alignItems: 'center', marginBottom: 6 }}>
      <input
        type="color"
        value={activeValue || '#000000'}
        onChange={(e) => onSelect(e.target.value)}
        style={{ width: 32, height: 28, border: 'none', cursor: 'pointer', background: 'none', padding: 0 }}
      />
      <input
        type="text"
        value={activeValue || ''}
        onChange={(e) => onSelect(e.target.value)}
        placeholder="#000000"
        style={{ flex: 1, padding: '3px 6px', background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 4, fontSize: 11, fontFamily: 'monospace', boxSizing: 'border-box' as const }}
      />
    </div>
    <div className="preset-grid">
      {colors.map((c) => (
        <button
          key={c.value}
          className={`preset-swatch ${activeValue === c.value ? 'active' : ''}`}
          style={{ background: c.value }}
          onClick={() => onSelect(c.value)}
          title={c.label}
        />
      ))}
    </div>
  </div>
);

interface PresetButtonGridProps {
  presets: { label: string; value: string }[];
  activeValue: string | undefined;
  onSelect: (value: string) => void;
  /** Explicit column count. When omitted, a column count is derived from
   *  `presets.length` (see `defaultPresetGridColumns`) so odd-sized preset
   *  sets (5, 6, ...) don't leave a lone orphan button dangling on its own
   *  row under the fixed 4-column grid. */
  columns?: number;
}

/** Picks a column count that avoids a single orphan on the last row.
 *  4-or-fewer presets keep the classic single row of 4. 5 gets its own
 *  row (5 cols). 6 splits into two even rows of 3. Anything else falls
 *  back to a 4- or 3-column grid depending on which divides evenly. */
export function defaultPresetGridColumns(count: number): number {
  if (count <= 4) return 4;
  if (count === 5) return 5;
  if (count === 6) return 3;
  if (count % 4 === 0) return 4;
  if (count % 3 === 0) return 3;
  return 4;
}

export const PresetButtonGrid: React.FC<PresetButtonGridProps> = ({ presets, activeValue, onSelect, columns }) => {
  const cols = columns ?? defaultPresetGridColumns(presets.length);
  return (
    <div className="preset-grid" style={{ gridTemplateColumns: `repeat(${cols}, 1fr)` }}>
      {presets.map((p) => (
        <button
          key={p.value}
          className={`preset-btn ${String(activeValue) === p.value ? 'active' : ''}`}
          onClick={() => onSelect(p.value)}
        >
          {p.label}
        </button>
      ))}
    </div>
  );
};

interface GradientSwatchGridProps {
  activeValue: string | undefined;
  onSelect: (value: string) => void;
}

/* Parse "linear-gradient(135deg, #aaa 0%, #bbb 100%)" into parts */
function parseGradient(val: string | undefined): { angle: number; from: string; to: string } {
  if (!val || val === 'none') return { angle: 135, from: '#667eea', to: '#764ba2' };
  const m = val.match(/linear-gradient\(\s*(\d+)deg\s*,\s*(#[0-9a-fA-F]{3,8})\s*(?:\d+%?)?\s*,\s*(#[0-9a-fA-F]{3,8})/);
  if (m) return { angle: parseInt(m[1]), from: m[2], to: m[3] };
  return { angle: 135, from: '#667eea', to: '#764ba2' };
}

export const GradientSwatchGrid: React.FC<GradientSwatchGridProps> = ({ activeValue, onSelect }) => {
  const [showCustom, setShowCustom] = useState(false);
  const parsed = parseGradient(activeValue);
  const [customFrom, setCustomFrom] = useState(parsed.from);
  const [customTo, setCustomTo] = useState(parsed.to);
  const [customAngle, setCustomAngle] = useState(parsed.angle);

  const applyCustomGradient = (from: string, to: string, angle: number) => {
    setCustomFrom(from);
    setCustomTo(to);
    setCustomAngle(angle);
    onSelect(`linear-gradient(${angle}deg, ${from} 0%, ${to} 100%)`);
  };

  return (
    <div>
      {/* Custom gradient builder toggle */}
      <button
        onClick={() => setShowCustom(!showCustom)}
        style={{
          width: '100%', padding: '5px 8px', fontSize: 11, marginBottom: 6,
          background: showCustom ? '#3b82f6' : '#27272a', color: showCustom ? '#fff' : '#a1a1aa',
          border: '1px solid #3f3f46', borderRadius: 4, cursor: 'pointer',
          display: 'flex', alignItems: 'center', gap: 6,
        }}
      >
        <i className={`fa fa-${showCustom ? 'chevron-down' : 'sliders'}`} style={{ fontSize: 10 }} />
        Custom Gradient
      </button>
      {showCustom && (
        <div style={{ padding: 8, background: '#1e1e22', borderRadius: 6, marginBottom: 8 }}>
          <div style={{ display: 'flex', gap: 8, marginBottom: 8 }}>
            <div style={{ flex: 1 }}>
              <label style={{ fontSize: 10, color: '#71717a', display: 'block', marginBottom: 3 }}>From</label>
              <div style={{ display: 'flex', gap: 4, alignItems: 'center' }}>
                <input type="color" value={customFrom} onChange={(e) => applyCustomGradient(e.target.value, customTo, customAngle)}
                  style={{ width: 28, height: 24, border: 'none', cursor: 'pointer', background: 'none', padding: 0 }} />
                <input type="text" value={customFrom} onChange={(e) => applyCustomGradient(e.target.value, customTo, customAngle)}
                  style={{ flex: 1, padding: '2px 4px', background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 3, fontSize: 10, fontFamily: 'monospace', boxSizing: 'border-box' as const }} />
              </div>
            </div>
            <div style={{ flex: 1 }}>
              <label style={{ fontSize: 10, color: '#71717a', display: 'block', marginBottom: 3 }}>To</label>
              <div style={{ display: 'flex', gap: 4, alignItems: 'center' }}>
                <input type="color" value={customTo} onChange={(e) => applyCustomGradient(customFrom, e.target.value, customAngle)}
                  style={{ width: 28, height: 24, border: 'none', cursor: 'pointer', background: 'none', padding: 0 }} />
                <input type="text" value={customTo} onChange={(e) => applyCustomGradient(customFrom, e.target.value, customAngle)}
                  style={{ flex: 1, padding: '2px 4px', background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 3, fontSize: 10, fontFamily: 'monospace', boxSizing: 'border-box' as const }} />
              </div>
            </div>
          </div>
          <div>
            <label style={{ fontSize: 10, color: '#71717a', display: 'block', marginBottom: 3 }}>Angle: {customAngle}°</label>
            <input type="range" min={0} max={360} value={customAngle} onChange={(e) => applyCustomGradient(customFrom, customTo, parseInt(e.target.value))}
              style={{ width: '100%' }} />
          </div>
          {/* Live preview */}
          <div style={{ height: 20, borderRadius: 4, marginTop: 6, background: `linear-gradient(${customAngle}deg, ${customFrom}, ${customTo})`, border: '1px solid #3f3f46' }} />
        </div>
      )}
      {/* Preset swatches */}
      <div className="preset-grid gradient-grid">
        {GRADIENTS.map((g) => (
          <button
            key={g.label}
            className={`preset-swatch gradient-swatch ${activeValue === g.value ? 'active' : ''}`}
            style={{ background: g.value === 'none' ? '#27272a' : g.value }}
            onClick={() => onSelect(g.value)}
            title={g.label}
          >
            {g.value === 'none' ? '\u00D7' : ''}
          </button>
        ))}
      </div>
    </div>
  );
};

interface TextInputFieldProps {
  label: string;
  value: string;
  placeholder?: string;
  onChange: (value: string) => void;
}
export const TextInputField: React.FC<TextInputFieldProps> = ({ label, value, placeholder, onChange }) => (
  <div className="guided-section">
    <SectionLabel>{label}</SectionLabel>
    <input
      type="text"
      className="guided-input"
      value={value}
      placeholder={placeholder}
      onChange={(e) => onChange(e.target.value)}
    />
  </div>
);

/* ---------- Color picker with hex input ---------- */
interface ColorPickerFieldProps {
  label: string;
  value: string;
  onChange: (value: string) => void;
}
export const ColorPickerField: React.FC<ColorPickerFieldProps> = ({ label, value, onChange }) => (
  <div style={sectionGap}>
    <label style={labelStyle}>{label}</label>
    <div style={{ display: 'flex', gap: 6, alignItems: 'center' }}>
      <input
        type="color"
        value={value || '#000000'}
        onChange={(e) => onChange(e.target.value)}
        style={{ width: 36, height: 30, border: 'none', cursor: 'pointer', background: 'none', padding: 0 }}
      />
      <input
        type="text"
        value={value || ''}
        onChange={(e) => onChange(e.target.value)}
        placeholder="#000000"
        style={{ ...inputStyle, flex: 1 }}
      />
    </div>
  </div>
);

/* ---------- Nav-family color fields ----------
   The Colors section is shared across the whole nav family (Navbar / Logo /
   Footer / Menu). Those components DON'T share a color-prop schema:
   Navbar/Logo/Footer use backgroundColor/textColor/ctaColor, while Menu uses
   linkColor/linkHoverColor/ctaBgColor/ctaTextColor. Deriving the visible fields
   from whichever props actually exist keeps the section from rendering empty
   (the "Colors dropdown with nothing to select" bug on Menu). */
export interface NavColorField {
  key: string;
  label: string;
  fallback: string;
}
const NAV_COLOR_FIELDS: NavColorField[] = [
  // Navbar / Logo / Footer schema
  { key: 'backgroundColor', label: 'Background', fallback: '#ffffff' },
  { key: 'textColor', label: 'Text Color', fallback: '#18181b' },
  { key: 'hoverColor', label: 'Hover Color', fallback: '#3b82f6' },
  { key: 'ctaColor', label: 'CTA Color', fallback: '#3b82f6' },
  // Menu schema (distinct prop names)
  { key: 'linkColor', label: 'Link Color', fallback: '#3f3f46' },
  { key: 'linkHoverColor', label: 'Hover Color', fallback: '#3b82f6' },
  { key: 'ctaBgColor', label: 'CTA Background', fallback: '#3b82f6' },
  // ctaTextColor is shared: Menu's CTA text AND Navbar's CTA text
  { key: 'ctaTextColor', label: 'CTA Text', fallback: '#ffffff' },
];
export function navColorFields(nodeProps: Record<string, any>): NavColorField[] {
  return NAV_COLOR_FIELDS.filter((f) => nodeProps[f.key] !== undefined);
}

/* ---------- Collapsible section ---------- */
export const CollapsibleSection: React.FC<{ title: string; defaultOpen?: boolean; children: React.ReactNode }> = ({ title, defaultOpen = true, children }) => {
  const [open, setOpen] = useState(defaultOpen);
  return (
    <div style={{ borderTop: '1px solid #2d2d3a', paddingTop: 8, marginTop: 4 }}>
      <button
        onClick={() => setOpen(!open)}
        style={{ display: 'flex', alignItems: 'center', gap: 6, width: '100%', background: 'none', border: 'none', color: '#a1a1aa', fontSize: 11, fontWeight: 600, cursor: 'pointer', padding: '4px 0', textTransform: 'uppercase', letterSpacing: '0.05em' }}
      >
        <i className={`fa fa-chevron-${open ? 'down' : 'right'}`} style={{ fontSize: 8, width: 10 }} />
        {title}
      </button>
      {open && <div style={{ paddingTop: 8 }}>{children}</div>}
    </div>
  );
};

/* ---------- StylePanelProps interface ---------- */
export interface StylePanelProps {
  selectedId: string;
  nodeProps: Record<string, any>;
}

/* ---------- useNodeProp ----------
   Shared setProp/setPropStyle boilerplate repeated across many *StylePanel.tsx
   files. Only adopted where a panel's inline definitions were byte-equivalent
   to this (some panels use different param names or extra logic and keep
   their own local versions). */
export function useNodeProp(selectedId: string) {
  const { actions } = useEditor();
  const setProp = useCallback((key: string, value: any) => actions.setProp(selectedId, (p: any) => { p[key] = value; }), [actions, selectedId]);
  const setPropStyle = useCallback((prop: string, value: string) => actions.setProp(selectedId, (p: any) => { p.style = { ...p.style, [prop]: value }; }), [actions, selectedId]);
  return { setProp, setPropStyle };
}

/* ---------- Array Prop Editor (reusable for features, items, plans, etc.) ---------- */
interface ArrayPropEditorProps {
  selectedId: string;
  propKey: string;
  items: any[];
  renderItem: (item: any, index: number) => React.ReactNode;
  emptyItem: any;
}
export const ArrayPropEditor: React.FC<ArrayPropEditorProps> = ({ selectedId, propKey, items, renderItem, emptyItem }) => {
  const { actions } = useEditor();

  const addItem = useCallback(() => {
    actions.setProp(selectedId, (props: any) => {
      props[propKey] = [...(props[propKey] || []), typeof emptyItem === 'object' ? { ...emptyItem } : emptyItem];
    });
  }, [actions, selectedId, propKey, emptyItem]);

  const removeItem = useCallback((index: number) => {
    actions.setProp(selectedId, (props: any) => {
      const updated = [...(props[propKey] || [])];
      updated.splice(index, 1);
      props[propKey] = updated;
    });
  }, [actions, selectedId, propKey]);

  return (
    <div>
      <div style={{ display: 'flex', flexDirection: 'column', gap: 6 }}>
        {items.map((item, i) => (
          <div key={i} style={{ background: '#1e1e22', borderRadius: 6, padding: 6, position: 'relative' }}>
            <button
              onClick={() => removeItem(i)}
              style={{ position: 'absolute', top: 4, right: 4, padding: '1px 5px', fontSize: 9, background: '#ef4444', color: '#fff', border: 'none', borderRadius: 4, cursor: 'pointer', zIndex: 1 }}
              title="Remove"
            >
              <i className="fa fa-times" />
            </button>
            {renderItem(item, i)}
          </div>
        ))}
      </div>
      <button
        onClick={addItem}
        style={{ marginTop: 6, width: '100%', padding: '6px', fontSize: 11, background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 4, cursor: 'pointer' }}
      >
        + Add Item
      </button>
    </div>
  );
};

/* =========================================================================
   ENH-Foundation: reusable StylePanel controls
   ---------------------------------------------------------------------
   Presentational (value + onChange) controls shared by upcoming feature
   panels (size/spacing/border/typography/animation/visibility rollout).
   Nothing below is wired into any feature panel yet -- that's the job of
   the downstream feature branches. Each control's onChange API is
   documented on its props interface; see
   .superpowers/sdd/task-enh-foundation-report.md for the consolidated list.
   ========================================================================= */

/* ---------- NumericUnitInput ----------
   A number field + unit dropdown that parses/holds a CSS length string
   ("16px", "50%", "auto", "") and calls onChange(nextString).
   - Clearing the number field emits ''  (not '0px') -- lets the consumer
     treat '' as "unset/inherit" instead of forcing a 0 value.
   - value === 'auto' or '' both display as a blank number field (with the
     `placeholder` -- default "auto" -- shown as a hint).
   - Changing the unit re-emits with the current number and the new unit;
     if the number is blank, changing the unit is a no-op (still emits '').
   - `units` is configurable (default ['px','%']); the unit <select> is
     omitted entirely when only one unit is passed. */
export function parseCssLength(value: string | undefined, units: string[] = ['px', '%']): { num: string; unit: string } {
  if (!value || value === 'auto') return { num: '', unit: units[0] };
  const m = String(value).trim().match(/^(-?\d*\.?\d+)\s*([a-zA-Z%]*)$/);
  if (!m) return { num: '', unit: units[0] };
  const unit = m[2] || units[0];
  return { num: m[1], unit: units.includes(unit) ? unit : units[0] };
}

export interface NumericUnitInputProps {
  /** CSS length string, e.g. "16px" / "50%" / "auto" / "". */
  value: string;
  /** Called with the recombined string, e.g. "16px". Called with '' when the
   *  number field is cleared. */
  onChange: (value: string) => void;
  /** Allowed unit list; default ['px', '%']. Unit <select> is hidden when
   *  this has length 1. */
  units?: string[];
  min?: number;
  max?: number;
  step?: number;
  placeholder?: string;
  /** Base for the data-testid attrs (`${testId}`, `${testId}-number`,
   *  `${testId}-unit`); default 'numeric-unit'. */
  testId?: string;
}
export const NumericUnitInput: React.FC<NumericUnitInputProps> = ({
  value, onChange, units = ['px', '%'], min, max, step, placeholder = 'auto', testId = 'numeric-unit',
}) => {
  const { num, unit } = parseCssLength(value, units);
  const emit = (nextNum: string, nextUnit: string) => {
    if (nextNum === '') { onChange(''); return; }
    onChange(`${nextNum}${nextUnit}`);
  };
  return (
    <div style={{ display: 'flex', gap: 4 }} data-testid={testId}>
      <input
        type="number"
        data-testid={`${testId}-number`}
        value={num}
        min={min}
        max={max}
        step={step}
        placeholder={placeholder}
        onChange={(e) => emit(e.target.value, unit)}
        style={{ ...inputStyle, flex: 1 }}
      />
      {units.length > 1 && (
        <select
          data-testid={`${testId}-unit`}
          value={unit}
          onChange={(e) => emit(num, e.target.value)}
          style={{ ...inputStyle, width: 60, flex: 'none' }}
        >
          {units.map((u) => <option key={u} value={u}>{u}</option>)}
        </select>
      )}
    </div>
  );
};

/* ---------- SizeControl ----------
   Width (or height) editor: preset buttons (25/50/75/100%, Auto, Full) +
   a custom NumericUnitInput. One dimension per instance -- render two
   (label="Width" / label="Height") for components needing both, e.g.
   ImageBlock / VideoBlock sizing. */
export interface SizeControlProps {
  label: string;
  /** CSS value for this one dimension, e.g. "100%" / "400px" / "auto" / "". */
  value: string;
  onChange: (value: string) => void;
  presets?: { label: string; value: string }[];
  units?: string[];
}
export const SizeControl: React.FC<SizeControlProps> = ({ label, value, onChange, presets = SIZE_PRESETS, units = ['px', '%'] }) => (
  <div className="guided-section" data-testid="size-control">
    <SectionLabel>{label}</SectionLabel>
    <PresetButtonGrid presets={presets} activeValue={value} onSelect={onChange} />
    <div style={{ marginTop: 6 }}>
      <NumericUnitInput
        value={presets.some((p) => p.value === value) ? '' : value}
        onChange={onChange}
        units={units}
        testId="size-control-custom"
      />
    </div>
  </div>
);

/* ---------- AspectRatioControl ----------
   Preset buttons + a custom "W:H" text entry. Emits a CSS `aspect-ratio`
   value, e.g. "16 / 9". 'Original' emits ''. Custom entry accepts
   "16:9" / "16/9" / "16x9" and is parsed on blur or Enter. */
export function parseAspectRatioInput(raw: string): string {
  const m = raw.trim().match(/^(\d+(?:\.\d+)?)\s*[:xX/]\s*(\d+(?:\.\d+)?)$/);
  if (!m) return '';
  return `${m[1]} / ${m[2]}`;
}
function formatAspectRatioForInput(value: string): string {
  const m = value.match(/^(\d+(?:\.\d+)?)\s*\/\s*(\d+(?:\.\d+)?)$/);
  return m ? `${m[1]}:${m[2]}` : '';
}
export interface AspectRatioControlProps {
  /** CSS `aspect-ratio` value, e.g. "16 / 9", or '' for Original/unset. */
  value: string;
  onChange: (value: string) => void;
  presets?: { label: string; value: string }[];
}
export const AspectRatioControl: React.FC<AspectRatioControlProps> = ({ value, onChange, presets = ASPECT_RATIOS }) => {
  const [custom, setCustom] = useState(() => formatAspectRatioForInput(value));

  const applyCustom = () => onChange(parseAspectRatioInput(custom));

  return (
    <div className="guided-section" data-testid="aspect-ratio-control">
      <SectionLabel>Aspect Ratio</SectionLabel>
      <PresetButtonGrid presets={presets} activeValue={value} onSelect={(v) => { onChange(v); setCustom(''); }} />
      <div style={{ marginTop: 6 }}>
        <input
          type="text"
          data-testid="aspect-ratio-custom-input"
          value={custom}
          placeholder="W:H e.g. 16:9"
          onChange={(e) => setCustom(e.target.value)}
          onBlur={applyCustom}
          onKeyDown={(e) => { if (e.key === 'Enter') applyCustom(); }}
          style={{ ...inputStyle }}
        />
      </div>
    </div>
  );
};

/* ---------- FocalPointGrid ----------
   3x3 grid of buttons mapping to CSS `object-position` keyword pairs.
   Used for image crop framing (object-position on an ImageBlock/VideoBlock
   with object-fit: cover). Highlights the active cell; defaults the
   highlight to 'center' when value is empty. */
export const FOCAL_POINTS: { label: string; value: string }[] = [
  { label: '↖', value: 'left top' }, { label: '↑', value: 'center top' }, { label: '↗', value: 'right top' },
  { label: '←', value: 'left center' }, { label: '•', value: 'center' }, { label: '→', value: 'right center' },
  { label: '↙', value: 'left bottom' }, { label: '↓', value: 'center bottom' }, { label: '↘', value: 'right bottom' },
];
export interface FocalPointGridProps {
  /** CSS `object-position` value, e.g. "center" / "left top". */
  value: string;
  onChange: (value: string) => void;
}
export const FocalPointGrid: React.FC<FocalPointGridProps> = ({ value, onChange }) => {
  const active = value || 'center';
  return (
    <div className="guided-section" data-testid="focal-point-grid">
      <SectionLabel>Focal Point</SectionLabel>
      <div style={{ display: 'grid', gridTemplateColumns: 'repeat(3, 1fr)', gap: 4, width: 96 }}>
        {FOCAL_POINTS.map((p) => (
          <button
            key={p.value}
            data-testid={`focal-point-${p.value.replace(/\s+/g, '-')}`}
            onClick={() => onChange(p.value)}
            title={p.value}
            style={{
              aspectRatio: '1', border: '1px solid #3f3f46', borderRadius: 4, cursor: 'pointer',
              background: active === p.value ? '#3b82f6' : '#27272a',
              color: active === p.value ? '#fff' : '#71717a', fontSize: 12,
            }}
          >
            {p.label}
          </button>
        ))}
      </div>
    </div>
  );
};

/* ---------- SpacingControl ----------
   Margin OR padding, per-side, with a link/unlink toggle.
   API: onChange(side, value) -- called once per side. In linked mode
   (default), editing the single shared field or clicking a preset calls
   onChange for all four sides ('top','right','bottom','left') with the
   same value so the consumer can setPropStyle each side independently
   (e.g. marginTop/marginRight/marginBottom/marginLeft). In unlinked mode
   each side's NumericUnitInput calls onChange for just that side. */
export type SpacingSide = 'top' | 'right' | 'bottom' | 'left';
export interface SpacingSideValues { top?: string; right?: string; bottom?: string; left?: string; }
const SPACING_SIDES: SpacingSide[] = ['top', 'right', 'bottom', 'left'];
export interface SpacingControlProps {
  label: string;
  value: SpacingSideValues;
  /** Called per-side. Linked edits/presets call this once for each of the
   *  4 sides (in top/right/bottom/left order) with the same value. */
  onChange: (side: SpacingSide, value: string) => void;
  presets?: { label: string; value: string }[];
  units?: string[];
}
export const SpacingControl: React.FC<SpacingControlProps> = ({ label, value, onChange, presets = SPACING_PRESETS, units = ['px', '%', 'em', 'rem'] }) => {
  const [linked, setLinked] = useState(true);

  const applyToAllSides = (v: string) => SPACING_SIDES.forEach((s) => onChange(s, v));
  const linkedValue = value.top ?? '';
  const isAllEqual = SPACING_SIDES.every((s) => (value[s] ?? '') === linkedValue);

  return (
    <div className="guided-section" data-testid="spacing-control">
      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
        <SectionLabel>{label}</SectionLabel>
        <button
          data-testid="spacing-link-toggle"
          onClick={() => setLinked(!linked)}
          title={linked ? 'Unlink sides' : 'Link sides'}
          style={{ background: 'none', border: 'none', color: linked ? '#3b82f6' : '#71717a', cursor: 'pointer', padding: 2 }}
        >
          <i className={`fa fa-link${linked ? '' : '-slash'}`} />
        </button>
      </div>
      <PresetButtonGrid presets={presets} activeValue={isAllEqual ? linkedValue : undefined} onSelect={applyToAllSides} />
      {linked ? (
        <div style={{ marginTop: 6 }}>
          <NumericUnitInput value={linkedValue} onChange={applyToAllSides} units={units} testId="spacing-linked" />
        </div>
      ) : (
        <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: 6, marginTop: 6 }}>
          {SPACING_SIDES.map((s) => (
            <div key={s}>
              <label style={{ ...labelStyle, fontSize: 9 }}>{s}</label>
              <NumericUnitInput value={value[s] ?? ''} onChange={(v) => onChange(s, v)} units={units} testId={`spacing-${s}`} />
            </div>
          ))}
        </div>
      )}
    </div>
  );
};

/* ---------- BorderControl ----------
   Width (px) + style (none/solid/dashed/dotted) + color. Single onChange
   receives the merged { width, style, color } object so the consumer can
   either setProp each part or build a shorthand via buildBorderShorthand()
   (returns 'none' when width is falsy or style is 'none'). */
export interface BorderValue { width: string; style: string; color: string; }
export interface BorderControlProps {
  value: BorderValue;
  onChange: (value: BorderValue) => void;
  label?: string;
}
export const BorderControl: React.FC<BorderControlProps> = ({ value, onChange, label = 'Border' }) => {
  const set = (patch: Partial<BorderValue>) => onChange({ ...value, ...patch });
  return (
    <div className="guided-section" data-testid="border-control">
      <SectionLabel>{label}</SectionLabel>
      <div style={{ display: 'flex', gap: 6, marginBottom: 6 }}>
        <div style={{ flex: 1 }}>
          <NumericUnitInput value={value.width} onChange={(v) => set({ width: v })} units={['px']} placeholder="0" testId="border-width" />
        </div>
        <select
          data-testid="border-style-select"
          value={value.style}
          onChange={(e) => set({ style: e.target.value })}
          style={{ ...inputStyle, flex: 1 }}
        >
          {BORDER_STYLES.map((s) => <option key={s.value} value={s.value}>{s.label}</option>)}
        </select>
      </div>
      <ColorPickerField label="Border Color" value={value.color} onChange={(v) => set({ color: v })} />
    </div>
  );
};
export function buildBorderShorthand(value: BorderValue): string {
  if (!value.width || !value.style || value.style === 'none') return 'none';
  return `${value.width} ${value.style} ${value.color || '#000000'}`;
}

/* ---------- AnimationControl ----------
   "Entrance animation" picker + optional delay. Emits the EXACT prop names
   the export machinery already consumes (verified against buildDataAttrs()
   in src/utils/html-export.ts): `animation` and `animationDelay`.
   NOTE: the export supports fade-in / slide-up / slide-left / slide-right /
   zoom-in / bounce (no "slide-down" -- html-export.ts has no such variant;
   slide-left/slide-right exist instead), so ANIMATIONS reflects that exact
   set rather than guessing. animationDelay is a plain seconds string (e.g.
   "0.3") -- html-export.ts's inline script assigns it straight to
   el.style.animationDelay, so consumers should suffix/accept a unit-bearing
   string like "0.3s" if that's what they choose to store; this control
   stores/edits the raw numeric string and leaves unit formatting to the
   caller (kept as the simplest contract; see report for the exact
   behavior verified against html-export.ts). */
export const ANIMATIONS: { label: string; value: string }[] = [
  { label: 'None', value: 'none' },
  { label: 'Fade In', value: 'fade-in' },
  { label: 'Slide Up', value: 'slide-up' },
  { label: 'Slide Left', value: 'slide-left' },
  { label: 'Slide Right', value: 'slide-right' },
  { label: 'Zoom In', value: 'zoom-in' },
  { label: 'Bounce', value: 'bounce' },
];
export interface AnimationValue { animation: string; animationDelay?: string; }
export interface AnimationControlProps {
  value: AnimationValue;
  onChange: (value: AnimationValue) => void;
}
export const AnimationControl: React.FC<AnimationControlProps> = ({ value, onChange }) => {
  const animation = value.animation || 'none';
  const animationDelay = value.animationDelay ?? '0';
  return (
    <div className="guided-section" data-testid="animation-control">
      <SectionLabel>Entrance Animation</SectionLabel>
      <PresetButtonGrid presets={ANIMATIONS} activeValue={animation} onSelect={(v) => onChange({ animation: v, animationDelay })} />
      {animation !== 'none' && (
        <div style={{ marginTop: 6 }}>
          <label style={labelStyle}>Delay (seconds)</label>
          <input
            type="number"
            data-testid="animation-delay-input"
            min={0}
            step={0.1}
            value={animationDelay}
            onChange={(e) => onChange({ animation, animationDelay: e.target.value })}
            style={inputStyle}
          />
        </div>
      )}
    </div>
  );
};

/* ---------- VisibilityControl ----------
   Hide on Desktop / Tablet / Mobile toggles. Emits the EXACT prop names
   the export machinery already consumes (verified against buildDataAttrs()
   in src/utils/html-export.ts): `hideOnDesktop`, `hideOnTablet`,
   `hideOnMobile` (each rendered as data-hide-desktop/tablet/mobile when
   truthy). Single onChange receives the merged object. */
export interface VisibilityValue { hideOnDesktop?: boolean; hideOnTablet?: boolean; hideOnMobile?: boolean; }
export interface VisibilityControlProps {
  value: VisibilityValue;
  onChange: (value: VisibilityValue) => void;
}
const VISIBILITY_KEYS: (keyof VisibilityValue)[] = ['hideOnDesktop', 'hideOnTablet', 'hideOnMobile'];
export const VisibilityControl: React.FC<VisibilityControlProps> = ({ value, onChange }) => (
  <div className="guided-section" data-testid="visibility-control">
    <SectionLabel>Visibility</SectionLabel>
    <div style={{ display: 'flex', flexDirection: 'column', gap: 6 }}>
      {VISIBILITY_KEYS.map((key) => (
        <label key={key} style={{ display: 'flex', alignItems: 'center', gap: 6, fontSize: 11, color: '#e4e4e7', cursor: 'pointer' }}>
          <input
            type="checkbox"
            data-testid={`visibility-${key}`}
            checked={!!value[key]}
            onChange={() => onChange({ ...value, [key]: !value[key] })}
          />
          Hide on {key.replace('hideOn', '')}
        </label>
      ))}
    </div>
  </div>
);