import { db } from "@/db";
import { apps, remoteConfig } from "@/db/schema";
import { eq } from "drizzle-orm";
import { NextResponse } from "next/server";

/**
 * GET /api/config/:slug
 *
 * :slug → bundle ID (önerilen)  örn: com.sirket.uygulama
 *        → numeric app ID (geriye dönük uyumluluk)  örn: 4
 *
 * Kimlik doğrulama — iki yöntemden biri:
 *   Authorization: Bearer <CONFIG_API_TOKEN>
 *   ?token=<CONFIG_API_TOKEN>
 */
export async function GET(
  request: Request,
  { params }: { params: Promise<{ slug: string }> }
) {
  // ── Auth ──────────────────────────────────────────────────────────────
  const apiToken = process.env.CONFIG_API_TOKEN;
  if (apiToken) {
    const authHeader = request.headers.get("Authorization") ?? "";
    const url = new URL(request.url);
    const queryToken = url.searchParams.get("token") ?? "";
    const bearerToken = authHeader.startsWith("Bearer ")
      ? authHeader.slice(7)
      : "";

    if ((bearerToken || queryToken) !== apiToken) {
      return NextResponse.json(
        { error: "Unauthorized" },
        {
          status: 401,
          headers: { "WWW-Authenticate": 'Bearer realm="config"' },
        }
      );
    }
  }

  // ── Lookup ────────────────────────────────────────────────────────────
  const { slug } = await params;
  const numericId = parseInt(slug);
  const isNumeric = !isNaN(numericId) && String(numericId) === slug;

  const app = await db.query.apps.findFirst({
    where: isNumeric
      ? eq(apps.id, numericId)
      : eq(apps.bundleId, slug),
  });

  if (!app) {
    return NextResponse.json({ error: "App not found" }, { status: 404 });
  }

  // Numeric ID ile gelindiyse bundle ID'li URL'e kalıcı yönlendir
  if (isNumeric) {
    const url = new URL(request.url);
    url.pathname = `/api/config/${app.bundleId}`;
    return NextResponse.redirect(url.toString(), 301);
  }

  // ── Config ────────────────────────────────────────────────────────────
  const configs = await db.query.remoteConfig.findMany({
    where: eq(remoteConfig.appId, app.id),
  });

  const configObject = configs.reduce<Record<string, unknown>>((acc, c) => {
    acc[c.configKey] = c.configValue;
    return acc;
  }, {});

  return NextResponse.json(configObject, {
    headers: { "Cache-Control": "no-store" },
  });
}