import type { Sequelize } from "sequelize";
import { QueryTypes } from "sequelize";

type Entry = {
  eventId?: string;
  id: string;
  companyId: string;
  companyName: string;
  name: string;
  recordedAt: string | null;
  actorName: string | null;
};

/** Proyección de lectura acotada; no reconstruye inventarios ni agregados. */
export class AssetDashboardReader {
  constructor(private readonly database: Sequelize) {}
  stats(companyId?: string) {
    return this.database.query<{ companyId: string; count: number }>(
      "SELECT companyId,COUNT(*) AS count FROM assets WHERE (:companyId IS NULL OR companyId=:companyId) GROUP BY companyId",
      { type: QueryTypes.SELECT, replacements: { companyId: companyId ?? null } }
    );
  }
  async entries(companyId?: string, issue?: string, page = 1) {
    const where =
      "WHERE (:companyId IS NULL OR a.companyId=:companyId)" +
      (issue === "missing_site" ? " AND a.siteId IS NULL" : "");
    const replacements = { companyId: companyId ?? null, offset: (page - 1) * 10 };
    const counts = await this.database.query<{ total: number }>(
      `SELECT COUNT(*) AS total FROM assets a ${where}`,
      { type: QueryTypes.SELECT, replacements }
    );
    const items = await this.database.query<Entry>(
      `SELECT a.id,a.companyId,c.name AS companyName,JSON_UNQUOTE(JSON_EXTRACT(a.\`values\`,'$.name')) AS name,NULL AS recordedAt,NULL AS actorName FROM assets a JOIN companies c ON c.id=a.companyId ${where} ORDER BY name,a.id LIMIT 10 OFFSET :offset`,
      { type: QueryTypes.SELECT, replacements }
    );
    return { total: Number(counts[0]?.total ?? 0), items };
  }
  inactivePeople(companyId?: string) {
    return this.database.query<{ id: string }>(
      "SELECT DISTINCT p.id FROM assets a JOIN company_contacts p ON p.id=a.personId AND p.companyId=a.companyId WHERE p.active=0 AND JSON_UNQUOTE(JSON_EXTRACT(a.`values`,'$.status')) <> 'retired' AND (:companyId IS NULL OR a.companyId=:companyId)",
      { type: QueryTypes.SELECT, replacements: { companyId: companyId ?? null } }
    );
  }
  activity(companyId?: string) {
    return this.database.query<Entry>(
      "SELECT a.id,r.id AS eventId,a.companyId,c.name AS companyName,JSON_UNQUOTE(JSON_EXTRACT(a.`values`,'$.name')) AS name,r.recordedAt,u.name AS actorName FROM asset_revisions r JOIN assets a ON a.id=r.assetId JOIN companies c ON c.id=a.companyId LEFT JOIN users u ON u.id=r.actorId WHERE (:companyId IS NULL OR a.companyId=:companyId) ORDER BY r.recordedAt DESC,r.id DESC LIMIT 6",
      { type: QueryTypes.SELECT, replacements: { companyId: companyId ?? null } }
    );
  }
}