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;
};

/** Consulta definiciones por stockKey, nunca por nombres editables. */
export class ResourceDashboardReader {
  constructor(private readonly database: Sequelize) {}

  stats(companyId?: string) {
    return this.database.query<{ companyId: string; count: number }>(
      "SELECT companyId,COUNT(*) AS count FROM resources WHERE companyId IS NOT NULL AND (: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 expiry = issue === "certificate" || issue === "license";
    const join = expiry
      ? " JOIN resource_definitions d ON d.id=r.templateId JOIN resource_definitions f ON f.stockKey='field:expires' JOIN resource_characteristics expiry ON expiry.resourceId=r.id AND expiry.fieldId=f.id"
      : "";
    const where =
      "WHERE r.companyId IS NOT NULL AND (:companyId IS NULL OR r.companyId=:companyId)" +
      (expiry
        ? " AND d.stockKey=:stockKey AND r.active=1 AND expiry.dateValue BETWEEN :today AND :until"
        : "");
    const today = new Date().toISOString().slice(0, 10);
    const until = new Date(Date.now() + 30 * 86400000).toISOString().slice(0, 10);
    const replacements = {
      companyId: companyId ?? null,
      stockKey: issue === "certificate" ? "template:certificate" : "template:software_license",
      today,
      until,
      offset: (page - 1) * 10,
    };
    const counts = await this.database.query<{ total: number }>(
      `SELECT COUNT(*) AS total FROM resources r ${join} ${where}`,
      { type: QueryTypes.SELECT, replacements }
    );
    const items = await this.database.query<Entry>(
      `SELECT r.id,r.companyId,c.name AS companyName,r.name AS name,NULL AS recordedAt,NULL AS actorName FROM resources r JOIN companies c ON c.id=r.companyId ${join} ${where} ORDER BY name,r.id LIMIT 10 OFFSET :offset`,
      { type: QueryTypes.SELECT, replacements }
    );

    return { total: Number(counts[0]?.total ?? 0), items };
  }

  activity(companyId?: string) {
    return this.database.query<Entry>(
      "SELECT r.id,h.id AS eventId,r.companyId,c.name AS companyName,r.name AS name,h.recordedAt,u.name AS actorName FROM resource_revisions h JOIN resources r ON r.id=h.resourceId JOIN companies c ON c.id=r.companyId LEFT JOIN users u ON u.id=h.actorId WHERE r.companyId IS NOT NULL AND (:companyId IS NULL OR r.companyId=:companyId) ORDER BY h.recordedAt DESC,h.id DESC LIMIT 6",
      { type: QueryTypes.SELECT, replacements: { companyId: companyId ?? null } }
    );
  }
}