import { NextResponse } from "next/server"
import type { NextRequest } from "next/server"

export function middleware(request: NextRequest) {
  const { pathname } = request.nextUrl

  // Public routes that don't require authentication
  const publicRoutes = [
    "/",
    "/auth/signin",
    "/auth/signup",
    "/auth/forgot-password",
    "/auth/reset-password",
  ]

  // Check if route is public
  const isPublicRoute = publicRoutes.some((route) => pathname === route || pathname.startsWith(route))

  // Get session token from cookie or header
  const sessionToken = request.cookies.get("session_token")?.value || 
                      request.headers.get("x-session-token")

  // If accessing public route, allow
  if (isPublicRoute) {
    return NextResponse.next()
  }

  // If no session token and trying to access protected route, redirect to signin
  if (!sessionToken && !isPublicRoute) {
    const signInUrl = new URL("/auth/signin", request.url)
    signInUrl.searchParams.set("redirect", pathname)
    return NextResponse.redirect(signInUrl)
  }

  return NextResponse.next()
}

// Matcher configuration for Next.js middleware
export const config = {
  matcher: [
    /*
     * Match all request paths except for the ones starting with:
     * - api (API routes)
     * - _next/static (static files)
     * - _next/image (image optimization files)
     * - favicon.ico (favicon file)
     * - public files (images, etc.)
     */
    "/((?!api|_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp|ico)).*)",
  ],
}