// services/company/companyService.js
const { findCompanyByDomain } = require("../../db/seller.db")

function normalizeDomain(hostname) {
  return hostname.replace(/^www\./, "")
}

async function findCompanyFromLink(url) {
  let hostname

  try {
    hostname = new URL(url).hostname
  } catch {
    return null
  }

  const domain = normalizeDomain(hostname)

  const company = await findCompanyByDomain(domain)
  if (company) {
    return company
  }

  const domainParts = domain.split(".")
  for (let i = 1; i <= domainParts.length - 2; i += 1) {
    const parentDomain = domainParts.slice(i).join(".")
    const parentCompany = await findCompanyByDomain(parentDomain)
    if (parentCompany) {
      return parentCompany
    }
  }

  return null
}

module.exports = {
  findCompanyFromLink,
}