/**
 * Verdict label helpers — convert long verdict strings to short display values
 * and derive CSS colour classes from emoji prefixes.
 */

/**
 * Converts a long verdict label into a short display string.
 * e.g. "🟢 BUY (High Conviction)" → "Strong"
 */
export function verdictShort(label: string | null | undefined): string {
  if (!label) return '—';
  if (label.includes('No Data')) return 'No Data';
  if (label.includes('High Conviction')) return 'Strong Buy';
  if (label.includes('Speculative')) return 'Speculative';
  if (label.includes('Momentum')) return 'Momentum';
  if (label.includes('BUY')) return 'Buy';
  if (label.includes('Efficient')) return 'Efficient';
  if (label.includes('Attractive')) return 'Attractive';
  if (label.includes('Neutral')) return 'Hold';
  if (label.includes('REJECT')) return 'Reject';
  if (label.includes('Avoid')) return 'Avoid';
  return label.replace(/[\u{1F7E2}\u{1F7E1}\u{1F534}]/u, '').trim();
}

/**
 * Returns a CSS colour class based on the verdict label content.
 *
 * Signal mapping:
 *   🟢 / High Conviction / Efficient / Attractive → green
 *   🟡 / Speculative / Momentum → yellow
 *   Neutral / Hold / no signal → blue  (calm, not alarming)
 *   🔴 / Avoid / Reject / REJECT → red
 */
export function vClass(
  label: string | null | undefined,
): 'green' | 'yellow' | 'red' | 'blue' | 'gray' {
  if (!label) return 'gray';
  // Insufficient data is unknown, not a neutral opinion — render gray
  if (label.includes('No Data')) return 'gray';
  if (
    label.startsWith('🟢') ||
    label.includes('High Conviction') ||
    label.includes('Efficient') ||
    label.includes('Attractive')
  )
    return 'green';
  if (label.startsWith('🟡') || label.includes('Speculative') || label.includes('Momentum'))
    return 'yellow';
  if (
    label.startsWith('🔴') ||
    label.includes('Avoid') ||
    label.includes('Reject') ||
    label.includes('REJECT')
  )
    return 'red';
  if (label.includes('Neutral') || label.includes('Hold') || label.includes('BUY')) return 'blue';
  return 'gray';
}

/**
 * Returns a CSS colour class for a portfolio advice string based on its emoji prefix.
 * 🟢 → 'green', 🟡 → 'yellow', 🟠 → 'orange', 🔴 → 'red', else 'gray'.
 */
export function advClass(
  advice: string | null | undefined,
): 'green' | 'yellow' | 'orange' | 'red' | 'gray' {
  if (advice?.includes('🟢')) return 'green';
  if (advice?.includes('🟡')) return 'yellow';
  if (advice?.includes('🟠')) return 'orange';
  if (advice?.includes('🔴')) return 'red';
  return 'gray';
}

/**
 * Returns 'green' for non-negative G/L percentage, 'red' otherwise.
 * Accepts string (e.g. "12.5") or number.
 */
export function glClass(pct: string | number | null | undefined): 'green' | 'red' {
  return parseFloat(String(pct ?? 0)) >= 0 ? 'green' : 'red';
}