/**
 * Create-desc gate (Call 2): disable Create desc unless these are present.
 * Does NOT require short_description, description, or price — Call 2 writes
 * short + long; price stays publish-only.
 */

export type CreateDescInput = {
  contentLlmEnabled: boolean;
  title: string;
  speciesId: number | null | undefined;
  woodCategoryIds: number[];
  primaryCatId: number | '' | null | undefined;
  edgeTermId: number | string | '' | null | undefined;
  figureTermIds: number[];
  gradeTermId: number | string | '' | null | undefined;
  moistureTermId: number | string | '' | null | undefined;
};

/** Human labels shown under Create desc when the gate fails. */
export const CREATE_DESC_LABELS: Record<string, string> = {
  content_llm: 'content LLM on',
  title: 'title',
  species: 'species',
  wood_categories: '≥1 wood category',
  primary: 'primary wood category',
  edge: 'edge type',
  figure: '≥1 figure',
  grade: 'grade',
  moisture: 'moisture',
};

function presentId(v: number | string | '' | null | undefined): boolean {
  if (v === null || v === undefined || v === '') return false;
  if (typeof v === 'number') return Number.isFinite(v);
  return String(v).trim() !== '';
}

/** Return missing field keys (stable order). Empty ⇒ Create desc enabled. */
export function missingCreateDesc(input: CreateDescInput): string[] {
  const missing: string[] = [];
  if (!input.contentLlmEnabled) missing.push('content_llm');
  if (!String(input.title ?? '').trim()) missing.push('title');
  if (input.speciesId == null || !Number.isFinite(Number(input.speciesId))) missing.push('species');
  if (!input.woodCategoryIds?.length) missing.push('wood_categories');
  if (!presentId(input.primaryCatId)) missing.push('primary');
  if (!presentId(input.edgeTermId)) missing.push('edge');
  if (!input.figureTermIds?.length) missing.push('figure');
  if (!presentId(input.gradeTermId)) missing.push('grade');
  if (!presentId(input.moistureTermId)) missing.push('moisture');
  return missing;
}

export function canCreateDesc(input: CreateDescInput): boolean {
  return missingCreateDesc(input).length === 0;
}

export function missingCreateDescLabels(input: CreateDescInput): string[] {
  return missingCreateDesc(input).map((k) => CREATE_DESC_LABELS[k] ?? k);
}