/** Score-Bänder der 5×5-Matrix (Farben/Stufen aus dem Mockup). */

export type RiskLevelKey = "low" | "medium" | "elevated" | "high" | "critical";

export function riskLevel(score: number): RiskLevelKey {
  if (score >= 20) return "critical";
  if (score >= 15) return "high";
  if (score >= 10) return "elevated";
  if (score >= 5) return "medium";
  return "low";
}

/** Zellen-Hintergrund der Heatmap — kräftige Ampelfarben (auf Dunkel kontrastreich). */
export const RISK_CELL_COLORS: Record<RiskLevelKey, string> = {
  low: "#2ea86b",
  medium: "#e3b427",
  elevated: "#e2802e",
  high: "#e0553f",
  critical: "#d63c5e",
};

/** Sättigungsstarke Farbskala grün→rot für den Risiko-Score-Balken. */
export const RISK_SCALE_GRADIENT =
  "linear-gradient(90deg,#2ec76b 0%,#e3b427 32%,#e2802e 60%,#e0553f 82%,#d63c5e 100%)";

/** Pillen-Ton je Stufe — gemäß Heatmap-Skala: Grün → Gelb → Orange → Rot. */
export const RISK_PILL_TONE: Record<RiskLevelKey, "ok" | "warn" | "orange" | "risk"> = {
  low: "ok",
  medium: "warn",
  elevated: "orange",
  high: "risk",
  critical: "risk",
};

export function riskRef(refNo: number): string {
  return `R-${String(refNo).padStart(3, "0")}`;
}