// Winter-shaped URLs (config_list recordUrl, config_form redirects) mapped
// onto the SPA's D-10 routes. The strings come from plugin YAML, so they are
// never used verbatim: only the current controller's list, create and record
// routes can come out (research Gap 8, T-10-20).
//
//   <vendor>/<plugin>/<controller>              -> list
//   <vendor>/<plugin>/<controller>/create       -> create
//   <vendor>/<plugin>/<controller>/update/:id   -> record (:id substituted)
//   anything else, or another controller        -> list
import { controllerPath, parseControllerId } from './controllerRoutes'

const DIGITS = /^\d+$/

export function mapWinterUrl(url: string | null | undefined, controllerId: string, id?: string | number | null): string {
  const params = parseControllerId(controllerId)
  const base = controllerPath(controllerId)
  if (!params || !base) {
    return '/'
  }
  const raw = (url ?? '').trim().split(/[?#]/, 1)[0] ?? ''
  const segments = raw.split('/').filter((segment) => segment !== '')
  const owner = [params.vendor, params.plugin, params.controller]
  const ownsUrl = owner.every((segment, index) => segments[index]?.toLowerCase() === segment.toLowerCase())
  if (!ownsUrl) {
    return base
  }
  const rest = segments.slice(owner.length)
  if (rest.length === 0) {
    return base
  }
  if (rest.length === 1 && rest[0] === 'create') {
    return `${base}/create`
  }
  if (rest.length === 2 && rest[0] === 'update') {
    const target = rest[1] === ':id' ? String(id ?? '') : (rest[1] ?? '')
    return DIGITS.test(target) ? `${base}/${target}` : base
  }
  return base
}