// Shared formatting for checklist incident-event messages (sc-33251).
// The client owns the checklist item fields (name, neris_benchmark) preserved
// on the incident at create time and sent in the event opts; every service
// that renders a checklist event message should build it with these helpers.

export interface ChecklistItemEvent {
  name?: unknown;
  neris_benchmark?: unknown;
}

function eventString(value: unknown): string {
  return typeof value === "string" ? value : "";
}

export function nerisBenchmarkLabel(nerisKey: string): string {
  return nerisKey
    .split(/[_\s]+/)
    .filter((word) => word !== "")
    .map((word) => word.charAt(0).toUpperCase() + word.slice(1).toLowerCase())
    .join(" ");
}

// checklistItemChange: "Checked"/"Unchecked", with the item name and an
// optional NERIS suffix when the event carries them.
export function buildChecklistMessage(checked: boolean, checklistItemEvent?: ChecklistItemEvent | null): string {
  const prefix = checked ? "Checked" : "Unchecked";
  const name = eventString(checklistItemEvent?.name);
  const nerisKey = eventString(checklistItemEvent?.neris_benchmark);
  if (name === "") {
    return prefix;
  }
  if (nerisKey !== "") {
    return `${prefix}: ${name} (NERIS: ${nerisBenchmarkLabel(nerisKey)})`;
  }
  return `${prefix}: ${name}`;
}

// incidentChecklistAddRemoved: "Added checklist"/"Removed checklist", with
// the checklist name when the event carries it.
export function buildIncidentChecklistMessage(addToIncident: boolean, checklistItemEvent?: ChecklistItemEvent | null): string {
  const prefix = addToIncident ? "Added checklist" : "Removed checklist";
  const name = eventString(checklistItemEvent?.name);
  if (name === "") {
    return prefix;
  }
  return `${prefix}: ${name}`;
}