import { getServerSession } from "next-auth/next";
import { authOptions } from "@/app/api/auth/options";
import { NextResponse } from "next/server";

export async function DELETE(
  req: Request, 
  props: { params: Promise<{ groupId: string; userId: string }> }
) {
  const params = await props.params;
  const session = await getServerSession(authOptions);

  if (!session) {
    return NextResponse.json({ error: "Non autorisé" }, { status: 401 });
  }

  try {
    const { groupId, userId } = await params;

    // Get client credentials token
    const tokenResponse = await fetch(
      `${process.env.KEYCLOAK_BASE_URL}/realms/${process.env.KEYCLOAK_REALM}/protocol/openid-connect/token`,
      {
        method: 'POST',
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
        },
        body: new URLSearchParams({
          grant_type: 'client_credentials',
          client_id: process.env.KEYCLOAK_CLIENT_ID!,
          client_secret: process.env.KEYCLOAK_CLIENT_SECRET!,
        }),
      }
    );

    const tokenData = await tokenResponse.json();

    if (!tokenResponse.ok) {
      console.error("Failed to get token:", tokenData);
      return NextResponse.json({ error: "Failed to get token" }, { status: 500 });
    }

    // Remove user from group
    const removeResponse = await fetch(
      `${process.env.KEYCLOAK_BASE_URL}/admin/realms/${process.env.KEYCLOAK_REALM}/users/${userId}/groups/${groupId}`,
      {
        method: 'DELETE',
        headers: {
          'Authorization': `Bearer ${tokenData.access_token}`,
        },
      }
    );

    if (!removeResponse.ok) {
      const errorData = await removeResponse.text();
      console.error("Failed to remove user from group:", {
        status: removeResponse.status,
        statusText: removeResponse.statusText,
        error: errorData,
        userId,
        groupId,
      });
      return NextResponse.json(
        { error: "Failed to remove user from group" }, 
        { status: removeResponse.status }
      );
    }

    return NextResponse.json({ success: true });
  } catch (error) {
    console.error("Error in remove user from group:", error);
    return NextResponse.json(
      { error: "Internal server error" }, 
      { status: 500 }
    );
  }
}