/**
 * Shared status presentation for the execution monitor: NodeStatus /
 * RunStatus → StatusBadge config, plus a human duration formatter.
 *
 * Kept as a tiny pure module so both ExecutionTimeline and
 * WorkflowRunViewer/ExecNodeDetails render statuses identically and the
 * mapping stays test-covered in one place.
 */
import type { StatusBadgeConfig } from '../badge/StatusBadge';
import type { NodeStatus, RunStatus } from './types';

/** NodeStatus → badge label + tailwind color classes. */
export const NODE_STATUS_BADGE: Record<NodeStatus, StatusBadgeConfig> = {
  idle: {
    label: 'Idle',
    className: 'bg-gray-100 text-gray-600 border border-gray-200',
  },
  pending: {
    label: 'Pending',
    className: 'bg-amber-100 text-amber-800 border border-amber-200',
  },
  running: {
    label: 'Running',
    className: 'bg-blue-100 text-blue-800 border border-blue-200',
  },
  success: {
    label: 'Success',
    className: 'bg-green-100 text-green-800 border border-green-200',
  },
  error: {
    label: 'Error',
    className: 'bg-red-100 text-red-800 border border-red-200',
  },
  skipped: {
    label: 'Skipped',
    className: 'bg-gray-100 text-gray-500 border border-gray-200',
  },
};

/** RunStatus → badge label + tailwind color classes. */
export const RUN_STATUS_BADGE: Record<RunStatus, StatusBadgeConfig> = {
  pending: {
    label: 'Pending',
    className: 'bg-amber-100 text-amber-800 border border-amber-200',
  },
  running: {
    label: 'Running',
    className: 'bg-blue-100 text-blue-800 border border-blue-200',
  },
  completed: {
    label: 'Completed',
    className: 'bg-green-100 text-green-800 border border-green-200',
  },
  failed: {
    label: 'Failed',
    className: 'bg-red-100 text-red-800 border border-red-200',
  },
  cancelled: {
    label: 'Cancelled',
    className: 'bg-gray-100 text-gray-600 border border-gray-200',
  },
  waiting: {
    label: 'Waiting',
    className: 'bg-purple-100 text-purple-800 border border-purple-200',
  },
};

/** Statuses that are still in flight (warrant a live indicator). */
const NON_TERMINAL: ReadonlySet<NodeStatus> = new Set(['running']);

export function isLiveStatus(status: NodeStatus): boolean {
  return NON_TERMINAL.has(status);
}

/**
 * Format a millisecond duration as a compact human string:
 * `42ms`, `1.23s`, `1m 5s`. Returns `null` for nullish/negative input.
 */
export function formatDuration(ms?: number | null): string | null {
  if (ms == null || ms < 0 || Number.isNaN(ms)) return null;
  if (ms < 1000) return `${Math.round(ms)}ms`;
  const totalSeconds = ms / 1000;
  if (totalSeconds < 60) {
    // up to 2 decimal places, trimming trailing zeros
    return `${parseFloat(totalSeconds.toFixed(2))}s`;
  }
  const minutes = Math.floor(totalSeconds / 60);
  const seconds = Math.round(totalSeconds % 60);
  return seconds > 0 ? `${minutes}m ${seconds}s` : `${minutes}m`;
}