use conduit_core::{err, Err, Result};
use ruma::{OwnedRoomId, OwnedUserId, RoomId, UserId};
use service::Services;

pub(crate) fn escape_html(s: &str) -> String {
	s.replace('&', "&")
		.replace('<', "&lt;")
		.replace('>', "&gt;")
}

pub(crate) fn get_room_info(services: &Services, id: &RoomId) -> (OwnedRoomId, u64, String) {
	(
		id.into(),
		services
			.rooms
			.state_cache
			.room_joined_count(id)
			.ok()
			.flatten()
			.unwrap_or(0),
		services
			.rooms
			.state_accessor
			.get_name(id)
			.ok()
			.flatten()
			.unwrap_or_else(|| id.to_string()),
	)
}

/// Parses user ID
pub(crate) fn parse_user_id(services: &Services, user_id: &str) -> Result<OwnedUserId> {
	UserId::parse_with_server_name(user_id.to_lowercase(), services.globals.server_name())
		.map_err(|e| err!("The supplied username is not a valid username: {e}"))
}

/// Parses user ID as our local user
pub(crate) fn parse_local_user_id(services: &Services, user_id: &str) -> Result<OwnedUserId> {
	let user_id = parse_user_id(services, user_id)?;

	if !services.globals.user_is_local(&user_id) {
		return Err!("User {user_id:?} does not belong to our server.");
	}

	Ok(user_id)
}

/// Parses user ID that is an active (not guest or deactivated) local user
pub(crate) fn parse_active_local_user_id(services: &Services, user_id: &str) -> Result<OwnedUserId> {
	let user_id = parse_local_user_id(services, user_id)?;

	if !services.users.exists(&user_id)? {
		return Err!("User {user_id:?} does not exist on this server.");
	}

	if services.users.is_deactivated(&user_id)? {
		return Err!("User {user_id:?} is deactivated.");
	}

	Ok(user_id)
}