import type { GoalState } from "./state.ts";

export type GoalDisplay = {
  label: "Active" | "Waiting" | "Paused" | "Blocked" | "Complete" | "None";
  color: "accent" | "warning" | "error" | "success" | "muted";
};

export function goalDisplay(state: GoalState): GoalDisplay {
  if (state.status === "none") return state.lastOutcome
    ? { label: "Complete", color: "success" }
    : { label: "None", color: "muted" };
  if (state.status === "blocked" ||
      (state.status === "paused" && state.pausedReason?.startsWith("blocked:"))) {
    return { label: "Blocked", color: "error" };
  }
  if (state.status === "paused") return { label: "Paused", color: "warning" };
  if (state.activeWait && !state.activeWait.wakeSent) return { label: "Waiting", color: "warning" };
  return { label: "Active", color: "accent" };
}

/** Full recall is deliberately separate from short transient notifications. */
export function goalDetails(state: GoalState): string {
  const display = goalDisplay(state);
  if (display.label === "None") return "Goal: None\nUse /goal <text> to set a goal.";
  const completed = state.status === "none" ? state.lastOutcome : undefined;
  const lines = [`Goal: ${display.label}`, "", completed?.text ?? state.text, ""];
  if (completed) {
    lines.push(`Completed: ${completed.at}`, `Evidence: ${completed.evidence}`);
  } else {
    if (state.pausedReason) lines.push(`Reason: ${state.pausedReason}`);
    if (state.status === "active" && state.activeWait) {
      lines.push(`Wait owner: ${state.activeWait.owner}`);
      if (state.activeWait.nextCheck) lines.push(`Next check: ${state.activeWait.nextCheck}`);
      if (state.activeWait.watchId) lines.push(`Watch: ${state.activeWait.watchId}`);
      if (state.activeWait.deadlineAt !== undefined) {
        const deadline = new Date(state.activeWait.deadlineAt);
        lines.push(`Deadline: ${Number.isFinite(deadline.getTime()) ? deadline.toISOString() : "invalid"}`);
      }
    }
    lines.push(`Checks: ${state.checks}/${state.maxChecks}`, `No-progress reports: ${state.noProgressReports}/${state.maxNoProgressReports}`);
  }
  lines.push("", "/goal stop | /goal resume | /goal clear");
  return lines.join("\n");
}