import { AUTH_COOKIE_NAME, BE_BASE_URL } from "@/app/services/constants";
import { NextRequest, NextResponse } from "next/server";
import { buildFilterParam } from "../utils";

export async function POST(request: NextRequest) {
  try {
    const { cookies } = await import("next/headers");
    const cookieStore = await cookies();
    const token = cookieStore.get(AUTH_COOKIE_NAME)?.value;

    if (!token) {
      return NextResponse.json(
        { message: "Missing Authorization header" },
        { status: 401 }
      );
    }

    const body = await request.json();
    const { filters = {}, pagination = { page: 1, limit: 100 }, sort } = body;

    const queryParams = new URLSearchParams();
    queryParams.set("limit", String(pagination.limit ?? 100));
    queryParams.set("page", String(pagination.page ?? 1));

    if (sort?.field && sort?.order) {
      queryParams.set("sort", `${sort.field}:${sort.order}`);
    }

    const filterParam = buildFilterParam(filters);
    if (filterParam) {
      queryParams.set("filter", filterParam);
    }

    const backendUrl = `${BE_BASE_URL}/api/v1/sessions${
      queryParams.size ? `?${queryParams.toString()}` : ""
    }`;

    const response = await fetch(backendUrl, {
      method: "GET",
      headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${token}`,
      },
      cache: "no-store",
    });

    if (!response.ok) {
      const errorData = await response
        .json()
        .catch(() => ({ message: "Failed to fetch sessions" }));

      return NextResponse.json(
        {
          success: false,
          message: errorData?.message || "Failed to fetch sessions",
        },
        { status: response.status }
      );
    }

    const data = await response.json();
    return NextResponse.json(data, { status: response.status });
  } catch (err: unknown) {
    console.error("Proxy POST /api/dashboard/admin/sessions error:", err);
    const errorMessage = err instanceof Error ? err.message : "Unknown error";
    return NextResponse.json(
      { message: "Internal server error", error: errorMessage },
      { status: 500 }
    );
  }
}