//! `POST /_matrix/client/*/user_directory/search`

pub mod v3 {
    //! `/v3/` ([spec])
    //!
    //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3user_directorysearch

    use js_int::{uint, UInt};
    use ruma_common::api::ruma_api;
    use ruma_identifiers::{MxcUri, UserId};
    use serde::{Deserialize, Serialize};

    ruma_api! {
        metadata: {
            description: "Performs a search for users.",
            method: POST,
            name: "search_users",
            r0_path: "/_matrix/client/r0/user_directory/search",
            stable_path: "/_matrix/client/v3/user_directory/search",
            rate_limited: true,
            authentication: AccessToken,
            added: 1.0,
        }

        request: {
            /// The term to search for.
            pub search_term: &'a str,

            /// The maximum number of results to return.
            ///
            /// Defaults to 10.
            #[serde(default = "default_limit", skip_serializing_if = "is_default_limit")]
            pub limit: UInt,

            /// Language tag to determine the collation to use for the (case-insensitive) search.
            ///
            /// See [MDN] for the syntax.
            ///
            /// [MDN]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Language#Syntax
            #[ruma_api(header = ACCEPT_LANGUAGE)]
            pub language: Option<String>,
        }

        response: {
            /// Ordered by rank and then whether or not profile info is available.
            pub results: Vec<User>,

            /// Indicates if the result list has been truncated by the limit.
            pub limited: bool,
        }

        error: crate::Error
    }

    impl<'a> Request<'a> {
        /// Creates a new `Request` with the given search term.
        pub fn new(search_term: &'a str) -> Self {
            Self { search_term, limit: default_limit(), language: None }
        }
    }

    impl Response {
        /// Creates a new `Response` with the given results and limited flag
        pub fn new(results: Vec<User>, limited: bool) -> Self {
            Self { results, limited }
        }
    }

    fn default_limit() -> UInt {
        uint!(10)
    }

    fn is_default_limit(limit: &UInt) -> bool {
        limit == &default_limit()
    }

    /// User data as result of a search.
    #[derive(Clone, Debug, Deserialize, Serialize)]
    #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
    pub struct User {
        /// The user's matrix user ID.
        pub user_id: Box<UserId>,

        /// The display name of the user, if one exists.
        #[serde(skip_serializing_if = "Option::is_none")]
        pub display_name: Option<String>,

        /// The avatar url, as an MXC, if one exists.
        ///
        /// If you activate the `compat` feature, this field being an empty string in JSON will
        /// result in `None` here during deserialization.
        #[serde(skip_serializing_if = "Option::is_none")]
        #[cfg_attr(
            feature = "compat",
            serde(default, deserialize_with = "ruma_serde::empty_string_as_none")
        )]
        pub avatar_url: Option<Box<MxcUri>>,
    }

    impl User {
        /// Create a new `User` with the given `UserId`.
        pub fn new(user_id: Box<UserId>) -> Self {
            Self { user_id, display_name: None, avatar_url: None }
        }
    }
}