// lib/signalRegistry.ts
export type SignalType = 'trajectory' | 'headwind' | 'neutral';

export interface SignalMetadata {
  id: string;
  name: string;
  type: SignalType;
  tier: number;
  weight: number;
  color: string;
  tooltip: string;
  source: string;
  missingReason: string;
}

export const SIGNAL_REGISTRY: SignalMetadata[] = [
  {
    id: 'building_permit_momentum',
    name: 'Permit Momentum',
    type: 'trajectory',
    tier: 1,
    weight: 0.15,
    color: '#0D9488',
    tooltip: 'Acceleration in new residential and commercial construction permits.',
    source: 'Nashville Open Data',
    missingReason: 'No permits filed in this tract recently.'
  },
  {
    id: 'zillow_zhvi_momentum',
    name: 'Home Price Momentum',
    type: 'trajectory',
    tier: 1,
    weight: 0.20,
    color: '#0D9488',
    tooltip: 'Month-over-month home price appreciation velocity.',
    source: 'Zillow ZHVI',
    missingReason: 'Insufficient transaction volume.'
  },
  // Add more as needed.
];

export const TRAJECTORY_SIGNAL_COUNT = SIGNAL_REGISTRY.filter(s => s.type === 'trajectory').length;
export const HEADWIND_SIGNAL_COUNT = SIGNAL_REGISTRY.filter(s => s.type === 'headwind').length;