import { MeiliSearch } from 'meilisearch';

export { MeiliSearch } from 'meilisearch';

export interface MeiliDocument {
  id: string;              // DB Message.id
  tenantId: string;        // tenant owner — required for multi-tenant filter
  content: string;
  senderName: string;      // empty string when null
  sourceGroupId: string;
  sourceGroupName: string;
  tags: string[];
  platform: string;
  approvedAt: number;      // Unix ms — Meilisearch sorts numbers, not ISO strings
}

export const MESSAGES_INDEX = 'tower-messages';

export function createMeiliClient(url: string, masterKey: string): MeiliSearch {
  return new MeiliSearch({ host: url, apiKey: masterKey });
}

export async function configureIndex(client: MeiliSearch): Promise<void> {
  // Ensure the index exists with the correct primary key
  // (Meilisearch v1.11 can't infer it when multiple fields end with `id`)
  try {
    await client.getIndex(MESSAGES_INDEX);
  } catch {
    await client.createIndex(MESSAGES_INDEX, { primaryKey: 'id' });
  }
  await client.index(MESSAGES_INDEX).updateSettings({
    searchableAttributes: ['content', 'senderName', 'sourceGroupName'],
    filterableAttributes: ['tenantId', 'sourceGroupId', 'tags', 'platform'],
    sortableAttributes: ['approvedAt'],
  });
}

export async function indexMessage(client: MeiliSearch, doc: MeiliDocument): Promise<void> {
  await client.index(MESSAGES_INDEX).addDocuments([doc], { primaryKey: 'id' });
}

export async function deleteMessage(client: MeiliSearch, id: string): Promise<void> {
  await client.index(MESSAGES_INDEX).deleteDocument(id);
}