import {
    convexAuthNextjsMiddleware,
    createRouteMatcher,
    isAuthenticatedNextjs,
    nextjsMiddlewareRedirect,
} from "@convex-dev/auth/nextjs/server";
import { NextResponse } from "next/server";

const isSignInPage = createRouteMatcher(["/auth"]);
const isProtectedPage = createRouteMatcher([
    "/app(.*)",
    "/onboarding(.*)",
]);

export default convexAuthNextjsMiddleware(async (request) => {
    const { pathname, search } = request.nextUrl;
    if (pathname === "/app" || pathname === "/app/") {
        return NextResponse.redirect(new URL(`/app/dashboard${search || ""}`, request.url));
    }
    const legacyRedirects: Record<string, string> = {
        "/dashboard": "/app/dashboard",
        "/search": "/app/search",
        "/inbox": "/app/inbox",
        "/settings": "/app/settings",
        "/data-sources": "/app/data-sources",
        "/help": "/app/help",
        "/leads": "/app/inbox",
        "/opportunities": "/app/search",
    };
    const legacyMatch = Object.keys(legacyRedirects).find((path) =>
        pathname === path || pathname.startsWith(`${path}/`)
    );
    if (legacyMatch) {
        const targetBase = legacyRedirects[legacyMatch];
        const suffix = pathname.slice(legacyMatch.length);
        const target = `${targetBase}${suffix}${search || ""}`;
        return NextResponse.redirect(new URL(target, request.url));
    }

    if (isSignInPage(request) && (await isAuthenticatedNextjs())) {
        return nextjsMiddlewareRedirect(request, "/app/dashboard");
    }
    if (isProtectedPage(request) && !(await isAuthenticatedNextjs())) {
        const nextUrl = new URL("/auth", request.url);
        nextUrl.searchParams.set("next", request.nextUrl.pathname + request.nextUrl.search);
        return NextResponse.redirect(nextUrl);
    }
});

export const config = {
    // The following matcher runs middleware on all routes
    // except static assets.
    matcher: ["/((?!.*\\..*|_next).*)", "/", "/(api|trpc)(.*)"],
};