pub mod request {
    use serde::{Deserialize, Serialize};
    use utoipa::ToSchema;

    #[derive(Debug, Deserialize, Serialize, ToSchema)]
    pub struct ScheduleMessageRequest {
        #[serde(with = "time::serde::rfc3339::option")]
        pub scheduled: Option<time::OffsetDateTime>,
        pub status: String,
        pub user_id: uuid::Uuid,
    }

    impl ScheduleMessageRequest {
        pub fn is_valid(&self) -> bool {
            self.scheduled.is_some() || !self.status.is_empty() || !self.user_id.is_nil()
        }
    }
}

pub mod response {
    use serde::{Deserialize, Serialize};
    use utoipa::ToSchema;

    #[derive(Debug, Default, Deserialize, Serialize, ToSchema)]
    pub struct ScheduleMessageResponse {
        pub message: String,
        pub data: Vec<textsender_models::message::scheduling::ScheduledMessage>
    }
}

pub mod endpoint {
    use crate::repo::scheduling as scheduling_repo;

    /// Endpoint to create a Scheudled Message
    #[utoipa::path(
    post,
    path = crate::caller::endpoints::SCHEDULE_MESSAGE,
    request_body(
        content = super::request::ScheduleMessageRequest,
        description = "Data needed to create a Scheduled Message",
        content_type = "application/json"
        ),
    responses(
        (status = 201, description = "Scheduled Message created", body = super::response::ScheduleMessageResponse),
        (status = 400, description = "Error", body = super::response::ScheduleMessageResponse),
        (status = 500, description = "Error creating Scheduled Message", body = super::response::ScheduleMessageResponse)
    )
)]
    pub async fn schedule_message(
        axum::Extension(pool): axum::Extension<sqlx::PgPool>,
        axum::Json(payload): axum::Json<super::request::ScheduleMessageRequest>,
    ) -> (
        axum::http::StatusCode,
        axum::Json<super::response::ScheduleMessageResponse>,
    ) {
        let mut response = super::response::ScheduleMessageResponse::default();

        if payload.is_valid() {
            if payload.status != textsender_models::message::scheduling::PENDING {
                response.message = String::from("scheduled message must be pending");
                (axum::http::StatusCode::BAD_REQUEST, axum::Json(response))
            } else {
                if can_schedule(&payload.scheduled) {
                    let mut scheduled_message = textsender_models::message::scheduling::ScheduledMessage {
                        user_id: payload.user_id,
                        ..Default::default()
                    };
                    match scheduling_repo::insert(&pool, &scheduled_message, &payload.user_id).await {
                        Ok((id, created)) => {
                            scheduled_message.id = id;
                            scheduled_message.created = Some(created);
                            response.message = String::from("Message scheduled");
                            (axum::http::StatusCode::CREATED, axum::Json(response))
                        }
                        Err(err) => {
                            eprintln!("Error: {err:?}");
                            response.message = String::from("Error inserting");
                            (axum::http::StatusCode::INTERNAL_SERVER_ERROR, axum::Json(response))
                        }
                    }
                } else {
                    response.message = String::from("Cannot schedule message");
                    (axum::http::StatusCode::BAD_REQUEST, axum::Json(response))
                }
            }
        } else {
            response.message = String::from("Request body is not valid");
            (axum::http::StatusCode::BAD_REQUEST, axum::Json(response))
        }
    }

    fn can_schedule(scheduled_time: &Option<time::OffsetDateTime>) -> bool {
        scheduled_time.is_some_and(|t| t - time::OffsetDateTime::now_utc() >= time::Duration::minutes(10))
    }
}