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use crate::{
    client::Client,
    error::Error,
    request::{Request, TryIntoRequest},
    response::{Response, ResponseFuture},
    routing::Route,
};
use std::future::IntoFuture;
use twilight_model::{
    channel::Message,
    id::{
        marker::{ChannelMarker, MessageMarker, WebhookMarker},
        Id,
    },
};

/// Get a webhook message by webhook ID, token, and message ID.
#[must_use = "requests must be configured and executed"]
pub struct GetWebhookMessage<'a> {
    http: &'a Client,
    message_id: Id<MessageMarker>,
    thread_id: Option<Id<ChannelMarker>>,
    token: &'a str,
    webhook_id: Id<WebhookMarker>,
}

impl<'a> GetWebhookMessage<'a> {
    pub(crate) const fn new(
        http: &'a Client,
        webhook_id: Id<WebhookMarker>,
        token: &'a str,
        message_id: Id<MessageMarker>,
    ) -> Self {
        Self {
            http,
            message_id,
            thread_id: None,
            token,
            webhook_id,
        }
    }

    /// Get a message in a thread belonging to the channel instead of the
    /// channel itself.
    pub fn thread_id(mut self, thread_id: Id<ChannelMarker>) -> Self {
        self.thread_id.replace(thread_id);

        self
    }

    /// Execute the request, returning a future resolving to a [`Response`].
    #[deprecated(since = "0.14.0", note = "use `.await` or `into_future` instead")]
    pub fn exec(self) -> ResponseFuture<Message> {
        self.into_future()
    }
}

impl IntoFuture for GetWebhookMessage<'_> {
    type Output = Result<Response<Message>, Error>;

    type IntoFuture = ResponseFuture<Message>;

    fn into_future(self) -> Self::IntoFuture {
        let http = self.http;

        match self.try_into_request() {
            Ok(request) => http.request(request),
            Err(source) => ResponseFuture::error(source),
        }
    }
}

impl TryIntoRequest for GetWebhookMessage<'_> {
    fn try_into_request(self) -> Result<Request, Error> {
        Ok(Request::builder(&Route::GetWebhookMessage {
            message_id: self.message_id.get(),
            thread_id: self.thread_id.map(Id::get),
            token: self.token,
            webhook_id: self.webhook_id.get(),
        })
        .use_authorization_token(false)
        .build())
    }
}