use ruma::api::client::space::get_hierarchy;

use crate::{services, Result, Ruma};

/// # `GET /_matrix/client/v1/rooms/{room_id}/hierarchy``
///
/// Paginates over the space tree in a depth-first manner to locate child rooms
/// of a given space.
pub async fn get_hierarchy_route(body: Ruma<get_hierarchy::v1::Request>) -> Result<get_hierarchy::v1::Response> {
	let sender_user = body.sender_user.as_ref().expect("user is authenticated");

	let skip = body.from.as_ref().and_then(|s| s.parse::<usize>().ok()).unwrap_or(0);

	let limit = body.limit.map_or(10, u64::from).min(100) as usize;

	let max_depth = body.max_depth.map_or(3, u64::from).min(10) as usize + 1; // +1 to skip the space room itself

	services().rooms.spaces.get_hierarchy(sender_user, &body.room_id, limit, skip, max_depth, body.suggested_only).await
}