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use super::{
    super::EntityMetadataFields, CreateGuildScheduledEvent, CreateGuildScheduledEventFields,
};
use crate::{
    error::Error,
    request::{AuditLogReason, Request, TryIntoRequest},
    response::{Response, ResponseFuture},
};
use std::future::IntoFuture;
use twilight_model::{
    guild::scheduled_event::{EntityType, GuildScheduledEvent},
    util::Timestamp,
};
use twilight_validate::request::{
    audit_reason as validate_audit_reason,
    scheduled_event_description as validate_scheduled_event_description, ValidationError,
};

/// Create an external scheduled event in a guild.
#[must_use = "requests must be configured and executed"]
pub struct CreateGuildExternalScheduledEvent<'a>(CreateGuildScheduledEvent<'a>);

#[allow(clippy::needless_pass_by_value)]
impl<'a> CreateGuildExternalScheduledEvent<'a> {
    pub(crate) const fn new(
        inner: CreateGuildScheduledEvent<'a>,
        name: &'a str,
        location: &'a str,
        scheduled_start_time: &'a Timestamp,
        scheduled_end_time: &'a Timestamp,
    ) -> Self {
        Self(CreateGuildScheduledEvent {
            fields: CreateGuildScheduledEventFields {
                entity_type: Some(EntityType::External),
                entity_metadata: Some(EntityMetadataFields {
                    location: Some(location),
                }),
                name: Some(name),
                scheduled_end_time: Some(scheduled_end_time),
                scheduled_start_time: Some(scheduled_start_time),
                ..inner.fields
            },
            ..inner
        })
    }

    /// Set the description of the event.
    ///
    /// Must be between 1 and 1000 characters in length.
    ///
    /// # Errors
    ///
    /// Returns an error of type [`ScheduledEventDescription`] if the
    /// description is invalid.
    ///
    /// [`ScheduledEventDescription`]: twilight_validate::request::ValidationErrorType::ScheduledEventDescription
    pub fn description(mut self, description: &'a str) -> Result<Self, ValidationError> {
        validate_scheduled_event_description(description)?;

        self.0.fields.description = Some(description);

        Ok(self)
    }

    /// Set the cover image of the event.
    ///
    /// This must be a Data URI, in the form of
    /// `data:image/{type};base64,{data}` where `{type}` is the image MIME type
    /// and `{data}` is the base64-encoded image. See [Discord Docs/Image Data].
    ///
    /// [Discord Docs/Image Data]: https://discord.com/developers/docs/reference#image-data
    pub const fn image(mut self, image: &'a str) -> Self {
        self.0.fields.image = Some(image);

        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<GuildScheduledEvent> {
        self.into_future()
    }
}

impl<'a> AuditLogReason<'a> for CreateGuildExternalScheduledEvent<'a> {
    fn reason(mut self, reason: &'a str) -> Result<Self, ValidationError> {
        validate_audit_reason(reason)?;

        self.0.reason.replace(reason);

        Ok(self)
    }
}

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

    type IntoFuture = ResponseFuture<GuildScheduledEvent>;

    fn into_future(self) -> Self::IntoFuture {
        self.0.exec()
    }
}

impl TryIntoRequest for CreateGuildExternalScheduledEvent<'_> {
    fn try_into_request(self) -> Result<Request, Error> {
        self.0.try_into_request()
    }
}