import type { PageSelectorItem } from '../types/components'
import type { PluginNavItem } from '../types/platform'

export interface PluginNavPageSelectorOptions {
  pluginIcon?: string
}

export function normalizeNavPath(path?: string): string {
  const raw = path?.trim() || '/'
  const prefixed = raw.startsWith('/') ? raw : `/${raw}`
  return prefixed.replace(/\/+$/, '') || '/'
}

export function pageIdFromPath(path: string, fallback: string): string {
  const normalized = normalizeNavPath(path)
  if (normalized === '/') return 'dashboard'
  return normalized.replace(/^\/+/, '').replace(/\/+/g, '-') || fallback
}

export function pluginNavItemToPageSelectorItem(
  item: PluginNavItem,
  index: number,
  options: PluginNavPageSelectorOptions = {},
): PageSelectorItem {
  const path = normalizeNavPath(item.path)
  return {
    id: item.id || pageIdFromPath(path, `page-${index + 1}`),
    label: item.label,
    to: path,
    icon: item.icon || options.pluginIcon,
  }
}

export function currentPagePath(
  pathname: string | undefined,
  routePrefix?: string,
): string | undefined {
  if (!pathname) return undefined
  const normalizedPathname = normalizeNavPath(pathname)
  const normalizedRoutePrefix = normalizeNavPath(routePrefix)

  if (normalizedPathname === normalizedRoutePrefix) return '/'
  if (
    normalizedRoutePrefix !== '/' &&
    normalizedPathname.startsWith(`${normalizedRoutePrefix}/`)
  ) {
    return normalizeNavPath(normalizedPathname.slice(normalizedRoutePrefix.length))
  }
  return normalizedPathname
}

export function currentItemIdFromLocation(
  pages: Array<Pick<PageSelectorItem, 'id' | 'to' | 'href'>>,
  pathname: string | undefined,
  routePrefix?: string,
): string | undefined {
  const path = currentPagePath(pathname, routePrefix)
  if (!path) return undefined
  return pages.find((page) => normalizeNavPath(page.to || page.href) === path)?.id
}