import { getServerSession } from "next-auth/next";
import { authOptions } from "@/app/api/auth/[...nextauth]/route";
import { NextResponse } from "next/server";

export async function GET(
  req: Request,
  { params }: { params: { groupId: string } }
) {
  const session = await getServerSession(authOptions);

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

  try {
    // 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 });
    }

    // Get group members
    const membersResponse = await fetch(
      `${process.env.KEYCLOAK_BASE_URL}/admin/realms/${process.env.KEYCLOAK_REALM}/groups/${params.groupId}/members`,
      {
        headers: {
          'Authorization': `Bearer ${tokenData.access_token}`,
        },
      }
    );

    if (!membersResponse.ok) {
      const errorData = await membersResponse.json();
      console.error("Failed to get group members:", errorData);
      return NextResponse.json({ error: "Failed to get group members" }, { status: membersResponse.status });
    }

    const members = await membersResponse.json();
    return NextResponse.json(members);
  } catch (error) {
    console.error("Error in get group members:", error);
    return NextResponse.json({ error: "Internal server error" }, { status: 500 });
  }
}

export async function POST(
  req: Request,
  { params }: { params: { groupId: string } }
) {
  const session = await getServerSession(authOptions);

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

  try {
    const { userId } = await req.json();

    // 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 });
    }

    // Add user to group
    const addResponse = await fetch(
      `${process.env.KEYCLOAK_BASE_URL}/admin/realms/${process.env.KEYCLOAK_REALM}/users/${userId}/groups/${params.groupId}`,
      {
        method: 'PUT',
        headers: {
          'Authorization': `Bearer ${tokenData.access_token}`,
        },
      }
    );

    if (!addResponse.ok) {
      const errorData = await addResponse.json();
      console.error("Failed to add user to group:", errorData);
      return NextResponse.json({ error: "Failed to add user to group" }, { status: addResponse.status });
    }

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