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use crate::{
    client::Client,
    error::Error,
    request::{Pending, Request},
    routing::Route,
};
use serde::Serialize;
use twilight_model::id::{ChannelId, GuildId, UserId};

#[derive(Serialize)]
struct UpdateUserVoiceStateFields {
    channel_id: ChannelId,
    #[serde(skip_serializing_if = "Option::is_none")]
    suppress: Option<bool>,
}

/// Update another user's voice state.
pub struct UpdateUserVoiceState<'a> {
    fields: UpdateUserVoiceStateFields,
    fut: Option<Pending<'a, ()>>,
    guild_id: GuildId,
    http: &'a Client,
    user_id: UserId,
}

impl<'a> UpdateUserVoiceState<'a> {
    pub(crate) fn new(
        http: &'a Client,
        guild_id: GuildId,
        user_id: UserId,
        channel_id: ChannelId,
    ) -> Self {
        Self {
            fields: UpdateUserVoiceStateFields {
                channel_id,
                suppress: None,
            },
            fut: None,
            guild_id,
            http,
            user_id,
        }
    }

    /// Toggle the user's suppress state.
    ///
    /// # Caveats
    ///
    /// - You must have the [`MUTE_MEMBERS`] permission to use this method.
    /// - When unsuppressed, non-bot users will have their
    /// `request_to_speak_timestamp` set to the current time. Bot users will
    /// not.
    /// - When suppressed, the user will have their `request_to_speak_timestamp`
    /// removed.
    ///
    /// [`MUTE_MEMBERS`]: twilight_model::guild::Permissions::MUTE_MEMBERS
    pub fn suppress(mut self) -> Self {
        self.fields.suppress.replace(true);

        self
    }

    fn start(&mut self) -> Result<(), Error> {
        let request = Request::builder(Route::UpdateUserVoiceState {
            guild_id: self.guild_id.0,
            user_id: self.user_id.0,
        })
        .json(&self.fields)?
        .build();

        self.fut.replace(Box::pin(self.http.verify(request)));

        Ok(())
    }
}

poll_req!(UpdateUserVoiceState<'_>, ());