import type { InferAttributes, InferCreationAttributes, Sequelize } from "sequelize";
import { DataTypes, Model, QueryTypes } from "sequelize";
export class AssetModel extends Model<
  InferAttributes<AssetModel>,
  InferCreationAttributes<AssetModel>
> {
  declare id: string;
  declare companyId: string;
  declare templateId: string;
  declare siteId: string | null;
  declare personId: string | null;
  declare specification: unknown;
  declare values: unknown;
}
export class AssetRevisionModel extends Model<
  InferAttributes<AssetRevisionModel>,
  InferCreationAttributes<AssetRevisionModel>
> {
  declare id: string;
  declare assetId: string;
  declare actorId: string;
  declare recordedAt: string;
  declare values: unknown;
  declare position: number;
  declare siteId: string | null;
  declare personId: string | null;
}
const id = { type: DataTypes.UUID, primaryKey: true };
const fk = (model: string, nullable = false) => ({
  type: DataTypes.UUID,
  allowNull: nullable,
  references: { model, key: "id" },
  onDelete: "RESTRICT",
});
export async function migrateInventory(database: Sequelize) {
  const query = database.getQueryInterface();
  const tables = await database.query<{ name: string }>(
    "SELECT TABLE_NAME AS name FROM information_schema.TABLES WHERE TABLE_SCHEMA=DATABASE()",
    { type: QueryTypes.SELECT }
  );
  const asset = {
    id,
    companyId: fk("companies"),
    templateId: fk("asset_definitions"),
    siteId: fk("company_sites", true),
    personId: fk("company_contacts", true),
    specification: { type: DataTypes.JSON, allowNull: false },
    values: { type: DataTypes.JSON, allowNull: false },
  };
  const revision = {
    id,
    assetId: fk("assets"),
    actorId: fk("users"),
    siteId: fk("company_sites", true),
    personId: fk("company_contacts", true),
    recordedAt: { type: DataTypes.STRING(30), allowNull: false },
    values: { type: DataTypes.JSON, allowNull: false },
    position: { type: DataTypes.INTEGER, allowNull: false },
  };
  if (!tables.some((table) => table.name === "assets")) {
    await query.createTable("assets", asset);
  }
  if (!tables.some((table) => table.name === "asset_revisions")) {
    await query.createTable("asset_revisions", revision);
  }
  const revisionColumns = await query.describeTable("asset_revisions");
  for (const [column, reference] of [
    ["siteId", "company_sites"],
    ["personId", "company_contacts"],
  ] as const) {
    if (!(column in revisionColumns)) {
      await query.addColumn("asset_revisions", column, fk(reference, true));
    }
    // Reconstruye las referencias de instalaciones que ya hubieran registrado revisiones.
    const source =
      column === "siteId"
        ? "UPDATE asset_revisions SET siteId = NULLIF(JSON_UNQUOTE(JSON_EXTRACT(`values`, '$.siteId')), 'null')"
        : "UPDATE asset_revisions SET personId = NULLIF(JSON_UNQUOTE(JSON_EXTRACT(`values`, '$.personId')), 'null')";
    await database.query(
      source + (column === "siteId" ? " WHERE siteId IS NULL" : " WHERE personId IS NULL")
    );
  }
  AssetModel.init(asset, { sequelize: database, tableName: "assets", timestamps: false });
  AssetRevisionModel.init(revision, {
    sequelize: database,
    tableName: "asset_revisions",
    timestamps: false,
  });
}