const pool = require("../config");

// Get all roles
const getAllRolesDb = async (searchParams = {}) => {
  let queryParams = [];

  // Pagination
  if (searchParams.limit) {
    const page = Number(searchParams.page ?? 1) - 1;
    queryParams = [Number(searchParams.limit ?? 10), page];
  }

  // Filtering
  const { whereConditions, whereParamAnd } = pool.buildFilterQuery(
    [
      { column: "r.role_name", param: searchParams.role_name, type: "string" },
      { column: "r.role_level", param: searchParams.role_level, type: "number" },
    ],
    queryParams
  );

  queryParams = whereParamAnd ? whereParamAnd : queryParams;

  const queryText = `
    SELECT 
      COUNT(*) OVER() AS total_data,
      r.role_id,
      r.role_name,
      r.role_description,
      r.role_level,
      r.created_at,
      r.updated_at,
      r.updated_by,
      r.deleted_at,
      r.deleted_by,
      r.created_by
    FROM m_roles r
    WHERE r.deleted_at IS NULL
    ${whereConditions.length > 0 ? `AND ${whereConditions.join(" AND ")}` : ""}
    ORDER BY r.role_id ASC
    ${searchParams.limit ? `OFFSET $2 ROWS FETCH NEXT $1 ROWS ONLY` : ''};
  `;

  const result = await pool.query(queryText, queryParams);

  const total = result?.recordset.length > 0 
    ? parseInt(result.recordset[0].total_data, 10) 
    : 0;

  return { data: result.recordset, total };
};

// Get role by ID
const getRolesByIdDb = async (id) => {
  const queryText = `
    SELECT 
      r.role_id,
      r.role_name,
      r.role_description,
      r.role_level,
      r.created_at,
      r.updated_at,
      r.updated_by,
      r.deleted_at,
      r.deleted_by,
      r.created_by
    FROM m_roles r
    WHERE r.role_id = $1 AND r.deleted_at IS NULL
  `;
  const result = await pool.query(queryText, [id]);
  return result.recordset;
};

// Create role
const createRolesDB = async (data) => {
  const store = { ...data };

  const { query: queryText, values } = pool.buildDynamicInsert("m_roles", store);
  const result = await pool.query(queryText, values);

  const insertedId = result.recordset[0]?.inserted_id;
  return insertedId ? await getRolesByIdDb(insertedId) : null;
};

// Update role
const updateRolesDb = async (id, data) => {
  const store = { ...data };
  const whereData = { role_id: id };

  const { query: queryText, values } = pool.buildDynamicUpdate("m_roles", store, whereData);
  await pool.query(`${queryText} AND deleted_at IS NULL`, values);

  return getRolesByIdDb(id);
};

// Soft delete role
const deleteRolesDb = async (id, deletedBy) => {
  const queryText = `
    UPDATE m_roles
    SET deleted_at = CURRENT_TIMESTAMP,
        deleted_by = $1
    WHERE role_id = $2 AND deleted_at IS NULL
  `;
  await pool.query(queryText, [deletedBy, id]);
  return true;
};

module.exports = {
  getAllRolesDb,
  getRolesByIdDb,
  createRolesDB,
  updateRolesDb,
  deleteRolesDb,
};