import React, { useCallback, useState } from 'react';
import { useEditor } from '@craftjs/core';
import { SHADOW_PRESETS } from '../../../constants/presets';
import {
  StylePanelProps,
  CollapsibleSection,
  ColorPickerField,
  SectionLabel,
  PresetButtonGrid,
  labelStyle,
  inputStyle,
  smallInputStyle,
  btnActiveStyle,
  sectionGap,
  useNodeProp,
  SpacingControl,
  BorderControl,
  BorderValue,
  buildBorderShorthand,
  AnimationControl,
  VisibilityControl,
} from './shared';

/** Parses a border shorthand string ("2px solid #hex") produced by
 *  buildBorderShorthand() back into its parts for round-tripping through
 *  BorderControl. See SectionTypePanel.tsx for the identical helper. */
function parseBorderShorthand(v: string | undefined): BorderValue {
  if (!v || v === 'none') return { width: '', style: 'none', color: '#000000' };
  const m = String(v).match(/^([\d.]+[a-z%]*)\s+(\w+)\s+(.+)$/);
  if (!m) return { width: '', style: 'none', color: '#000000' };
  return { width: m[1], style: m[2], color: m[3] };
}

const capSide = (s: string): string => s.charAt(0).toUpperCase() + s.slice(1);

const bulletOptions = [
  { label: '✓', value: 'check' },
  { label: '●', value: 'dot' },
  { label: '→', value: 'arrow' },
  { label: '★', value: 'star' },
  { label: '—', value: 'dash' },
  { label: 'None', value: 'none' },
];

const bulletChar: Record<string, string> = {
  check: '✓', dot: '●', arrow: '→', star: '★', dash: '—', none: '',
};

export const PricingStylePanel: React.FC<StylePanelProps> = ({ selectedId, nodeProps }) => {
  const { actions } = useEditor();
  const { setProp, setPropStyle } = useNodeProp(selectedId);
  const [expandedPlan, setExpandedPlan] = useState<number>(0);

  const plans: any[] = Array.isArray(nodeProps.plans) ? nodeProps.plans : [];
  const currentBullet = nodeProps.bulletType || 'check';
  const style = nodeProps.style || {};

  const updatePlan = useCallback((planIndex: number, field: string, value: any) => {
    actions.setProp(selectedId, (props: any) => {
      const updated = [...(Array.isArray(props.plans) ? props.plans : [])];
      updated[planIndex] = { ...updated[planIndex], [field]: value };
      props.plans = updated;
    });
  }, [actions, selectedId]);

  const addPlan = useCallback(() => {
    actions.setProp(selectedId, (props: any) => {
      const updated = [...(Array.isArray(props.plans) ? props.plans : [])];
      updated.push({
        name: 'New Plan',
        price: '$0',
        period: '/month',
        features: ['Feature 1'],
        buttonText: 'Choose Plan',
        buttonHref: '#',
        isFeatured: false,
      });
      props.plans = updated;
    });
  }, [actions, selectedId]);

  const removePlan = useCallback((index: number) => {
    actions.setProp(selectedId, (props: any) => {
      const updated = [...(Array.isArray(props.plans) ? props.plans : [])];
      updated.splice(index, 1);
      props.plans = updated;
    });
  }, [actions, selectedId]);

  const addFeature = useCallback((planIndex: number) => {
    actions.setProp(selectedId, (props: any) => {
      const updated = [...(Array.isArray(props.plans) ? props.plans : [])];
      const features = [...(Array.isArray(updated[planIndex]?.features) ? updated[planIndex].features : [])];
      features.push('New feature');
      updated[planIndex] = { ...updated[planIndex], features };
      props.plans = updated;
    });
  }, [actions, selectedId]);

  const updateFeature = useCallback((planIndex: number, featureIndex: number, value: string) => {
    actions.setProp(selectedId, (props: any) => {
      const updated = [...(Array.isArray(props.plans) ? props.plans : [])];
      const features = [...(Array.isArray(updated[planIndex]?.features) ? updated[planIndex].features : [])];
      features[featureIndex] = value;
      updated[planIndex] = { ...updated[planIndex], features };
      props.plans = updated;
    });
  }, [actions, selectedId]);

  const removeFeature = useCallback((planIndex: number, featureIndex: number) => {
    actions.setProp(selectedId, (props: any) => {
      const updated = [...(Array.isArray(props.plans) ? props.plans : [])];
      const features = [...(Array.isArray(updated[planIndex]?.features) ? updated[planIndex].features : [])];
      features.splice(featureIndex, 1);
      updated[planIndex] = { ...updated[planIndex], features };
      props.plans = updated;
    });
  }, [actions, selectedId]);

  return (
    <>
      {/* Bullet type */}
      <CollapsibleSection title="Bullet Style">
        <div style={{ display: 'flex', gap: 4 }}>
          {bulletOptions.map((b) => (
            <button key={b.value} onClick={() => actions.setProp(selectedId, (p: any) => { p.bulletType = b.value; })}
              style={{ ...btnActiveStyle(currentBullet === b.value), flex: 1, fontSize: 14 }}>
              {b.label}
            </button>
          ))}
        </div>
      </CollapsibleSection>

      {/* Plans */}
      <CollapsibleSection title={`Plans (${plans.length})`}>
        {plans.map((plan, i) => {
          const isExpanded = expandedPlan === i;
          const features: string[] = Array.isArray(plan.features) ? plan.features : [];

          return (
            <div key={i} style={{
              marginBottom: 8, background: '#18181b', borderRadius: 6,
              border: plan.isFeatured ? '1px solid #3b82f6' : '1px solid #27272a',
            }}>
              {/* Plan header - click to expand */}
              <div onClick={() => setExpandedPlan(isExpanded ? -1 : i)} style={{
                padding: '8px 10px', cursor: 'pointer', display: 'flex', justifyContent: 'space-between', alignItems: 'center',
              }}>
                <span style={{ fontSize: 12, fontWeight: 600, color: '#e4e4e7' }}>
                  {plan.name || 'Plan'} {plan.isFeatured && <span style={{ fontSize: 9, background: '#3b82f6', color: '#fff', padding: '1px 5px', borderRadius: 3, marginLeft: 4 }}>Featured</span>}
                </span>
                <div style={{ display: 'flex', gap: 4, alignItems: 'center' }}>
                  <span style={{ fontSize: 11, color: '#71717a' }}>{plan.price}</span>
                  <i className={`fa fa-chevron-${isExpanded ? 'up' : 'down'}`} style={{ fontSize: 10, color: '#71717a' }} />
                </div>
              </div>

              {/* Expanded plan settings */}
              {isExpanded && (
                <div style={{ padding: '0 10px 10px', display: 'flex', flexDirection: 'column', gap: 6 }}>
                  <div style={{ display: 'flex', gap: 4 }}>
                    <div style={{ flex: 1 }}>
                      <label style={{ fontSize: 9, color: '#52525b' }}>Name</label>
                      <input type="text" value={plan.name || ''} onChange={(e) => updatePlan(i, 'name', e.target.value)} style={smallInputStyle} />
                    </div>
                    <div style={{ flex: 1 }}>
                      <label style={{ fontSize: 9, color: '#52525b' }}>Price</label>
                      <input type="text" value={plan.price || ''} onChange={(e) => updatePlan(i, 'price', e.target.value)} style={smallInputStyle} />
                    </div>
                  </div>
                  <div>
                    <label style={{ fontSize: 9, color: '#52525b' }}>Period</label>
                    <input type="text" value={plan.period || ''} onChange={(e) => updatePlan(i, 'period', e.target.value)} placeholder="/month" style={smallInputStyle} />
                  </div>
                  <div style={{ display: 'flex', gap: 4 }}>
                    <div style={{ flex: 1 }}>
                      <label style={{ fontSize: 9, color: '#52525b' }}>Button Text</label>
                      <input type="text" value={plan.buttonText || ''} onChange={(e) => updatePlan(i, 'buttonText', e.target.value)} style={smallInputStyle} />
                    </div>
                    <div style={{ flex: 1 }}>
                      <label style={{ fontSize: 9, color: '#52525b' }}>Button URL</label>
                      <input type="text" value={plan.buttonHref || ''} onChange={(e) => updatePlan(i, 'buttonHref', e.target.value)} style={smallInputStyle} />
                    </div>
                  </div>
                  <label style={{ fontSize: 10, color: '#71717a', display: 'flex', alignItems: 'center', gap: 4, cursor: 'pointer' }}>
                    <input type="checkbox" checked={!!plan.isFeatured} onChange={(e) => updatePlan(i, 'isFeatured', e.target.checked)} />
                    Featured (highlighted)
                  </label>

                  {/* Features list */}
                  <div>
                    <label style={{ fontSize: 9, color: '#52525b', display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
                      <span>Features ({features.length})</span>
                      <button onClick={() => addFeature(i)} style={{ fontSize: 9, background: '#3b82f6', color: '#fff', border: 'none', borderRadius: 3, padding: '2px 6px', cursor: 'pointer' }}>
                        + Add
                      </button>
                    </label>
                    <div style={{ display: 'flex', flexDirection: 'column', gap: 2, marginTop: 4 }}>
                      {features.map((feat, fi) => (
                        <div key={fi} style={{ display: 'flex', gap: 2, alignItems: 'center' }}>
                          <span style={{ fontSize: 11, color: '#10b981', width: 14, textAlign: 'center' }}>{bulletChar[currentBullet] || '✓'}</span>
                          <input type="text" value={feat} onChange={(e) => updateFeature(i, fi, e.target.value)} style={{ ...smallInputStyle, flex: 1 }} />
                          <button onClick={() => removeFeature(i, fi)} style={{ fontSize: 9, background: '#ef4444', color: '#fff', border: 'none', borderRadius: 3, padding: '1px 4px', cursor: 'pointer', lineHeight: 1 }}>
                            ×
                          </button>
                        </div>
                      ))}
                    </div>
                  </div>

                  {/* Remove plan */}
                  {plans.length > 1 && (
                    <button onClick={() => removePlan(i)} style={{ fontSize: 10, background: 'none', color: '#ef4444', border: '1px solid #ef4444', borderRadius: 4, padding: '3px 8px', cursor: 'pointer', marginTop: 4 }}>
                      Remove Plan
                    </button>
                  )}
                </div>
              )}
            </div>
          );
        })}

        <button onClick={addPlan} style={{ width: '100%', padding: '6px', fontSize: 11, background: '#27272a', color: '#e4e4e7', border: '1px solid #3f3f46', borderRadius: 4, cursor: 'pointer', marginTop: 4 }}>
          + Add Plan
        </button>
      </CollapsibleSection>

      {/* Colors */}
      <CollapsibleSection title="Colors" defaultOpen={false}>
        <ColorPickerField label="Featured Plan Color" value={nodeProps.featuredBg || '#3b82f6'} onChange={(v) => actions.setProp(selectedId, (p: any) => { p.featuredBg = v; })} />
        {/* Regular (non-featured) card colors -- built into PricingTable's
            render/toHtml but previously hard-coded literals with no control
            surfacing them. Each falls back to the prior literal when blank. */}
        <ColorPickerField label="Card Background" value={nodeProps.cardBg || '#ffffff'} onChange={(v) => setProp('cardBg', v)} />
        <ColorPickerField label="Heading / Price Color" value={nodeProps.textColor || '#18181b'} onChange={(v) => setProp('textColor', v)} />
        <ColorPickerField label="Period Text Color" value={nodeProps.subColor || '#64748b'} onChange={(v) => setProp('subColor', v)} />
        <ColorPickerField label="Feature Text Color" value={nodeProps.featColor || '#4b5563'} onChange={(v) => setProp('featColor', v)} />
        <ColorPickerField label="Checkmark Color" value={nodeProps.checkColor || '#10b981'} onChange={(v) => setProp('checkColor', v)} />
        <ColorPickerField label="Button Background" value={nodeProps.btnBg || nodeProps.featuredBg || '#3b82f6'} onChange={(v) => setProp('btnBg', v)} />
        <ColorPickerField label="Button Text Color" value={nodeProps.btnColor || '#ffffff'} onChange={(v) => setProp('btnColor', v)} />
      </CollapsibleSection>

      {/* Box model: margin, padding, border, shadow, opacity */}
      <CollapsibleSection title="Spacing & Border" defaultOpen={false}>
        <SpacingControl
          label="Margin"
          value={{
            top: style.marginTop as string, right: style.marginRight as string,
            bottom: style.marginBottom as string, left: style.marginLeft as string,
          }}
          onChange={(side, v) => setPropStyle(`margin${capSide(side)}`, v)}
        />
        <SpacingControl
          label="Padding"
          value={{
            top: style.paddingTop as string, right: style.paddingRight as string,
            bottom: style.paddingBottom as string, left: style.paddingLeft as string,
          }}
          onChange={(side, v) => setPropStyle(`padding${capSide(side)}`, v)}
        />
        <BorderControl
          value={parseBorderShorthand(style.border as string)}
          onChange={(v) => setPropStyle('border', buildBorderShorthand(v))}
        />
        <div className="guided-section">
          <SectionLabel>Shadow</SectionLabel>
          <PresetButtonGrid presets={SHADOW_PRESETS} activeValue={style.boxShadow as string} onSelect={(v) => setPropStyle('boxShadow', v)} />
        </div>
        <div className="guided-section">
          <SectionLabel>Opacity</SectionLabel>
          <input
            type="range"
            min={0}
            max={100}
            value={style.opacity !== undefined ? Math.round(Number(style.opacity) * 100) : 100}
            onChange={(e) => setPropStyle('opacity', String(Number(e.target.value) / 100))}
            style={{ width: '100%' }}
          />
        </div>
      </CollapsibleSection>

      {/* Entrance animation */}
      <CollapsibleSection title="Animation" defaultOpen={false}>
        <AnimationControl
          value={{ animation: nodeProps.animation || 'none', animationDelay: nodeProps.animationDelay || '0' }}
          onChange={(v) => { setProp('animation', v.animation); setProp('animationDelay', v.animationDelay); }}
        />
      </CollapsibleSection>

      {/* Responsive visibility */}
      <CollapsibleSection title="Visibility" defaultOpen={false}>
        <VisibilityControl
          value={{
            hideOnDesktop: !!nodeProps.hideOnDesktop,
            hideOnTablet: !!nodeProps.hideOnTablet,
            hideOnMobile: !!nodeProps.hideOnMobile,
          }}
          onChange={(v) => {
            setProp('hideOnDesktop', !!v.hideOnDesktop);
            setProp('hideOnTablet', !!v.hideOnTablet);
            setProp('hideOnMobile', !!v.hideOnMobile);
          }}
        />
      </CollapsibleSection>
    </>
  );
};