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

// Primero se retiran los hijos y las referencias; las tablas raíz quedan al final.
export const ARCHIVED_SUPPORT_TABLES = [
  "intervention_procedure_steps",
  "intervention_procedures",
  "intervention_revision_targets",
  "intervention_revision_steps",
  "intervention_targets",
  "intervention_steps",
  "intervention_revisions",
  "interventions",
  "intervention_counter",
  "ticket_revision_targets",
  "ticket_targets",
  "ticket_revisions",
  "tickets",
  "ticket_counter",
  "intervention_template_revision_steps",
  "intervention_template_steps",
  "intervention_template_revisions",
  "intervention_templates",
  "intervention_template_lock",
] as const;

/** Retirada idempotente: MariaDB confirma el DDL y permite continuar tras una interrupción. */
export async function removeArchivedSupportTables(database: Sequelize) {
  const references = await database.query<{ tableName: string }>(
    "SELECT TABLE_NAME AS tableName FROM information_schema.KEY_COLUMN_USAGE WHERE REFERENCED_TABLE_SCHEMA=DATABASE() AND REFERENCED_TABLE_NAME IN (:tables)",
    { replacements: { tables: [...ARCHIVED_SUPPORT_TABLES] }, type: QueryTypes.SELECT }
  );
  const archivedTables = new Set<string>(ARCHIVED_SUPPORT_TABLES);

  if (references.some((reference) => !archivedTables.has(reference.tableName))) {
    throw new Error(
      "Una tabla activa referencia tablas de soporte archivadas. Revisar la migración."
    );
  }
  const existing = await database.query<{ name: string }>(
    "SELECT TABLE_NAME AS name FROM information_schema.TABLES WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME IN (:tables)",
    { replacements: { tables: [...ARCHIVED_SUPPORT_TABLES] }, type: QueryTypes.SELECT }
  );
  const query = database.getQueryInterface();

  for (const table of ARCHIVED_SUPPORT_TABLES) {
    if (existing.some((item) => item.name === table)) {
      await query.dropTable(table);
    }
  }
}