/**
 * Custom session messages for dashboard / bridge consumers.
 */

export const GOAL_EVENT_TYPE = "pi-goal-expander:event";

export interface GoalEventDetails {
  kind: string;
  goalId?: string;
  status?: string;
  phase?: string;
  objective?: string;
  [key: string]: unknown;
}

/**
 * Build a CustomMessage-compatible payload for pi.sendMessage.
 */
export function buildGoalEvent(details: GoalEventDetails): {
  customType: string;
  content: string;
  display: boolean;
  details: GoalEventDetails;
} {
  const kind = details.kind ?? "event";
  const goalBit = details.goalId ? ` goal=${details.goalId}` : "";
  const statusBit = details.status ? ` status=${details.status}` : "";
  return {
    customType: GOAL_EVENT_TYPE,
    content: `[pi-goal-expander] ${kind}${goalBit}${statusBit}`,
    display: false,
    details,
  };
}