if (process.env.NODE_ENV !== "test")
    require("server-only");
import getPool from "@/lib/server/db";
import { apiError } from "@/lib/server/errors";

export type GroupRole = "MEMBER" | "GROUP_ADMIN" | "GROUP_OWNER";

export async function getGroupRole(userId: number, groupId: number): Promise<GroupRole | null> {
    const pool = getPool();
    const { rows } = await pool.query(
        "select role from group_members where user_id=$1 and group_id=$2",
        [userId, groupId]
    );
    return (rows[0]?.role as GroupRole | undefined) ?? null;
}

export function isAdminRole(role: GroupRole | null | undefined) {
    return role === "GROUP_ADMIN" || role === "GROUP_OWNER";
}

export async function requireGroupMember(userId: number, groupId: number): Promise<GroupRole> {
    const role = await getGroupRole(userId, groupId);
    if (!role) apiError("FORBIDDEN", { userId, groupId });
    return role;
}

export async function requireGroupAdmin(userId: number, groupId: number): Promise<GroupRole> {
    const role = await getGroupRole(userId, groupId);
    if (!isAdminRole(role)) apiError("FORBIDDEN", { userId, groupId });
    return role!;
}

export async function requireGroupOwner(userId: number, groupId: number): Promise<GroupRole> {
    const role = await getGroupRole(userId, groupId);
    if (role !== "GROUP_OWNER") apiError("FORBIDDEN", { userId, groupId });
    return role;
}