import { isInstallModeEnabled } from '@services/install/install'
import {
  LEARNHOUSE_DOMAIN,
  getDefaultOrg,
  isMultiOrgModeEnabled,
} from './services/config/config'
import { NextResponse } from 'next/server'
import type { NextRequest } from 'next/server'

export const config = {
  matcher: [
    /*
     * Match all paths except for:
     * 1. /api routes
     * 2. /_next (Next.js internals)
     * 3. /fonts (inside /public)
     * 4. /examples (inside /public)
     * 5. all root files inside /public (e.g. /favicon.ico)
     */
    '/((?!api|_next|fonts|examples|[\\w-]+\\.\\w+).*)',
  ],
}

export default async function middleware(req: NextRequest) {
  // Get initial data
  const hosting_mode = isMultiOrgModeEnabled() ? 'multi' : 'single'
  const default_org = getDefaultOrg()
  const pathname = req.nextUrl.pathname
  const fullhost = req.headers ? req.headers.get('host') : ''

  // Organizations & Global settings
  if (pathname.startsWith('/organizations')) {
    return NextResponse.rewrite(new URL(pathname, req.url))
  }

  // Install Page
  if (pathname.startsWith('/install')) {
    // Check if install mode is enabled
    const install_mode = await isInstallModeEnabled()
    if (install_mode) {
      return NextResponse.rewrite(new URL(pathname, req.url))
    } else {
      return NextResponse.redirect(new URL('/', req.url))
    }
  }

  // Dynamic Pages Editor
  if (pathname.match(/^\/course\/[^/]+\/activity\/[^/]+\/edit$/)) {
    return NextResponse.rewrite(new URL(`/editor${pathname}`, req.url))
  }

  // Multi Organization Mode
  if (hosting_mode === 'multi') {
    // Get the organization slug from the URL
    const orgslug = fullhost
      ? fullhost.replace(`.${LEARNHOUSE_DOMAIN}`, '')
      : default_org
    return NextResponse.rewrite(new URL(`/orgs/${orgslug}${pathname}`, req.url))
  }

  // Single Organization Mode
  if (hosting_mode === 'single') {
    // Get the default organization slug
    const orgslug = default_org
    return NextResponse.rewrite(new URL(`/orgs/${orgslug}${pathname}`, req.url))
  }
}